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? semiconductor components industries, llc, 2008 december, 2008 ? rev. 11 1 publication order number: mc34161/d mc34161, mc33161, ncv33161 universal voltage monitors the mc34161/mc33161 are universal voltage monitors intended for use in a wide variety of voltage sensing applications. these devices offer the circuit designer an economical solution for positive and negative voltage detection. the circuit consists of two comparator channels each with hysteresis, a unique mode select input for channel programming, a pinned out 2.54 v reference, and two open collector outputs capable of sinking in excess of 10 ma. each comparator channel can be configured as either inverting or noninverting by the mode select input. this allows over, under, and window detection of positive and negative voltages. the minimum supply voltage needed for these devices to be fully functional is 2.0 v for positive voltage sensing and 4.0 v for negative voltage sensing. applications include direct monitoring of positive and negative voltages used in appliance, automotive, consumer, and industrial equipment. features ? unique mode select input allows channel programming ? over, under, and window voltage detection ? positive and negative voltage detection ? fully functional at 2.0 v for positive voltage sensing and 4.0 v for negative voltage sensing ? pinned out 2.54 v reference with current limit protection ? low standby current ? open collector outputs for enhanced device flexibility ? ncv prefix for automotive and other applications requiring site and control changes ? pb ? free packages are available figure 1. simplified block diagram (positive voltage window detector application) v cc 6 1 7 v s 2 3 + 1.27v + 1.27v + 2.8v + 0.6v + - 8 5 2.54v reference - + - + + - 4 this device contains 141 transistors. pdip ? 8 p suffix case 626 1 soic ? 8 d suffix case 751 1 marking diagrams x = 3 or 4 a = assembly location wl, l = wafer lot yy, y = year ww, w = work week g or = pb ? free package pin connections v ref input 1 input 2 gnd v cc mode select output 1 output 2 1 2 3 4 8 7 6 5 (top view) 1 8 mc3x161p awl yywwg see detailed ordering and shipping information in the package dimensions section on page 15 of this data sheet. ordering information micro8 dm suffix case 846a 1 8 1 x161 ayw http://onsemi.com (note: microdot may be in either location) 3x161 alyw 1 8
mc34161, mc33161, ncv33161 http://onsemi.com 2 maximum ratings (note 1) rating symbol value unit power supply input voltage v cc 40 v comparator input voltage range v in ? 1.0 to +40 v comparator output sink current (pins 5 and 6) (note 2) i sink 20 ma comparator output voltage v out 40 v power dissipation and thermal characteristics (note 2) p suffix, plastic package, case 626 maximum power dissipation @ t a = 70 c thermal resistance, junction ? to ? air d suffix, plastic package, case 751 maximum power dissipation @ t a = 70 c thermal resistance, junction ? to ? air dm suffix, plastic package, case 846a thermal resistance, junction ? to ? ambient p d r ja p d r ja r ja 800 100 450 178 240 mw c/w mw c/w c/w operating junction temperature t j +150 c operating ambient temperature (note 3) mc34161 mc33161 ncv33161 t a 0 to +70 ? 40 to +105 ? 40 to +125 c storage temperature range t stg ? 55 to +150 c stresses exceeding maximum ratings may damage the device. maximum ratings are stress ratings only. functional operation above t he recommended operating conditions is not implied. extended exposure to stresses above the recommended operating conditions may af fect device reliability. 1. this device series contains esd protection and exceeds the following tests: human body model 2000 v per mil ? std ? 883, method 3015. machine model method 200 v. 2. maximum package power dissipation must be observed. 3. t low =0 c for mc34161 t high = +70 c for mc34161 ? 40 c for mc33161 +105 c for mc33161 ? 40 c for ncv33161 +125 c for ncv33161
mc34161, mc33161, ncv33161 http://onsemi.com 3 electrical characteristics (v cc = 5.0 v, for typical values t a = 25 c, for min/max values t a is the operating ambient temperature range that applies [notes 4 and 5], unless otherwise noted.) characteristics symbol min typ max unit comparator inputs threshold voltage, v in increasing (t a = 25 c) (t a = t min to t max ) v th 1.245 1.235 1.27 ? 1.295 1.295 v threshold voltage variation (v cc = 2.0 v to 40 v) v th ? 7.0 15 mv threshold hysteresis, v in decreasing v h 15 25 35 mv threshold difference |v th1 ? v th2 | v d ? 1.0 15 mv reference to threshold difference (v ref ? v in1 ), (v ref ? v in2 ) v rtd 1.20 1.27 1.32 v input bias current (v in = 1.0 v) (v in = 1.5 v) i ib ? ? 40 85 200 400 na mode select input mode select threshold voltage (figure 6) channel 1 channel 2 v th(ch 1) v th(ch 2) v ref +0.15 0.3 v ref +0.23 0.63 v ref +0.30 0.9 v comparator outputs output sink saturation voltage (i sink = 2.0 ma) (i sink = 10 ma) (i sink = 0.25 ma, v cc = 1.0 v) v ol ? ? ? 0.05 0.22 0.02 0.3 0.6 0.2 v off ? state leakage current (v oh = 40 v) i oh ? 0 1.0 a reference output output voltage (i o = 0 ma, t a = 25 c) v ref 2.48 2.54 2.60 v load regulation (i o = 0 ma to 2.0 ma) reg load ? 0.6 15 mv line regulation (v cc = 4.0 v to 40 v) reg line ? 5.0 15 mv total output variation over line, load, and temperature v ref 2.45 ? 2.60 v short circuit current i sc ? 8.5 30 ma total device power supply current (v mode , v in1 , v in2 = gnd) (v cc = 5.0 v) (v cc = 40 v) i cc ? ? 450 560 700 900 a operating voltage range (positive sensing) (negative sensing) v cc 2.0 4.0 ? ? 40 40 v 4. low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible. 5. t low =0 c for mc34161 t high = +70 c for mc34161 ? 40 c for mc33161 +105 c for mc33161 ? 40 c for ncv33161 +125 c for ncv33161
mc34161, mc33161, ncv33161 http://onsemi.com 4 v out , channel output voltage (v) t a = 25 c t a = -40 c t a = -40 c t a = 85 c t a = 85 c 1.0 3.0 0 0.5 1.5 2.5 2.0 3.5 channel 2 threshold channel 1 threshold v cc = 5.0 v r l = 10 k to v cc v mode , mode select input voltage (v) t a = 25 c figure 2. comparator input threshold voltage v cc = 5.0 v r l = 10 k to v cc t a = 25 c v t a = -40 c t a = 85 c t a = 25 c 1.22 1.28 1.23 1.24 1.25 1.26 1.27 1.29 v in , input voltage (v) out , output voltage (v) t a = 85 c t a = 25 c t a = -40 c figure 3. comparator input bias current versus input voltage 4.0 6.0 0 2.0 1 2 3 4 1. v mode = gnd, output falling 2. v mode = v cc , output rising 3. v mode = v cc , output falling 4. v mode = gnd, output rising v cc = 5.0 v t a = 25 c 8.0 10 , output propagation delay time (ns) phl t percent overdrive (%) figure 4. output propagation delay time versus percent overdrive figure 5. output voltage versus supply voltage i , input bias current (na) ib v cc = 5.0 v v mode = gnd t a = 25 c 1.0 3.0 2.0 0 4.0 5.0 v in , input voltage (v) figure 6. mode select thresholds 0 2.0 4.0 6.0 8.0 v cc , supply voltage (v) v out , output voltage (v) t a = -40 c t a = -25 c t a = -85 c figure 7. mode select input current versus input voltage 1.0 3.0 2.0 0 4.0 5.0 v cc = 5.0 v t a = 25 c v mode , mode select input voltage (v) 2.0 1.0 6.0 5.0 0 4.0 3.0 2.0 1.0 6.0 5.0 0 4.0 3.0 3600 3000 2400 1800 1200 600 500 400 300 200 100 0 8.0 6.0 4.0 2.0 0 40 35 30 25 20 15 10 5.0 0 , mode select input current ( a) mode i undervoltage detector programmed to trip at 4.5 v r 1 = 1.8 k, r 2 = 4.7 k r l = 10 k to v cc refer to figure 17
mc34161, mc33161, ncv33161 http://onsemi.com 5 v out , output saturation voltage (v) ref v , reference voltage (v) figure 8. reference voltage versus supply voltage v mode = gnd t a = 25 c 10 30 20 40 v cc , supply voltage (v) figure 9. reference voltage versus ambient temperature , reference voltage change (mv) ref v 1.0 0 i ref , reference source current (ma) 2.0 3.0 4.0 5.0 6.0 7.0 8.0 t a = 85 c t a = 25 c v cc = 5.0 v v mode = gnd t a = -40 c figure 10. reference voltage change versus source current 10 0 v cc , supply voltage (v) 20 30 40 , supply current (ma) cc i v mode = gnd pins 2, 3 = 1.5 v v mode = v ref pin 1 = 1.5 v pin 2 = gnd i cc measured at pin 8 t a = 25 c v mode = v cc pins 2, 3 = gnd figure 11. output saturation voltage versus output sink current figure 12. supply current versus supply voltage figure 13. supply current versus output sink current , reference output voltage (v) ref v v cc = 5.0 v v mode = gnd t a , ambient temperature ( c) -55 -25 0 25 50 75 100 125 v ref min = 2.48 v v ref typ = 2.54 v v ref max = 2.60 v 4.0 0 i out , output sink current (ma) 8.0 12 16 t a = 85 c t a = 25 c t a = -40 c v cc = 5.0 v v mode = gnd v cc = 5.0 v v mode = gnd t a = 25 c 4.0 0 i out , output sink current (ma) 8.0 12 16 , input supply current (ma) cc i 2.8 2.4 2.0 1.6 1.2 0.8 0.4 0 0 0 -2.0 -4.0 -6.0 -8.0 -10 0.8 0.6 0 0.4 0.2 2.610 2.578 2.546 2.514 2.482 2.450 0.1 0.5 0.4 0 0.3 0.2 1.6 1.2 0 0.8 0.4
mc34161, mc33161, ncv33161 http://onsemi.com 6 figure 14. mc34161 representative block diagram 8 v cc 2.54v reference + 1.27v + 2.8v + - - + + 1.27v + 0.6v - + + - 4 1 v ref 6 5 output 1 output 2 mode select 7 input 1 2 input 2 3 gnd channel 1 channel 2 mode select pin 7 input 1 pin 2 output 1 pin 6 input 2 pin 3 output 2 pin 5 comments gnd 0 1 0 1 0 1 0 1 channels 1 & 2: noninverting v ref 0 1 0 1 0 1 1 0 channel 1: noninverting channel 2: inverting v cc (>2.0 v) 0 1 1 0 0 1 1 0 channels 1 & 2: inverting figure 15. truth table
mc34161, mc33161, ncv33161 http://onsemi.com 7 functional description introduction to be competitive in today?s electronic equipment market, new circuits must be designed to increase system reliability with minimal incremental cost. the circuit designer can take a significant step toward attaining these goals by implementing economical circuitry that continuously monitors critical circuit voltages and provides a fault signal in the event of an out ? of ? tolerance condition. the mc34161, mc33161 series are universal voltage monitors intended for use in a wide variety of voltage sensing applications. the main objectives of this series was to configure a device that can be used in as many voltage sensing applications as possible while minimizing cost. the flexibility objective is achieved by the utilization of a unique mode select input that is used in conjunction with traditional circuit building blocks. the cost objective is achieved by processing the device on a standard bipolar analog flow, and by limiting the package to eight pins. the device consists of two comparator channels each with hysteresis, a mode select input for channel programming, a pinned out reference, and two open collector outputs. each comparator channel can be configured as either inverting or noninverting by the mode select input. this allows a single device to perform over, under, and window detection of positive and negative voltages. a detailed description of each section of the device is given below with the representative block diagram shown in figure 14. input comparators the input comparators of each channel are identical, each having an upper threshold voltage of 1.27 v 2.0% with 25 mv of hysteresis. the hysteresis is provided to enhance output switching by preventing oscillations as the comparator thresholds are crossed. the comparators have an input bias current of 60 na at their threshold which approximates a 21.2 m resistor to ground. this high impedance minimizes loading of the external voltage divider for well defined trip points. for all positive voltage sensing applications, both comparator channels are fully functional at a v cc of 2.0 v. in order to provide enhanced device ruggedness for hostile industrial environments, additional circuitry was designed into the inputs to prevent device latchup as well as to suppress electrostatic discharges (esd). reference the 2.54 v reference is pinned out to provide a means for the input comparators to sense negative voltages, as well as a means to program the mode select input for window detection applications. the reference is capable of sourcing in excess of 2.0 ma output current and has built ? in short circuit protection. the output voltage has a guaranteed tolerance of 2.4% at room temperature. the 2.54 v reference is derived by gaining up the internal 1.27 v reference by a factor of two. with a power supply voltage of 4.0 v, the 2.54 v reference is in full regulation, allowing the device to accurately sense negative voltages. mode select circuit the key feature that allows this device to be flexible is the mode select input. this input allows the user to program each of the channels for various types of voltage sensing applications. figure 15 shows that the mode select input has three defined states. these states determine whether channel 1 and/or channel 2 operate in the inverting or noninverting mode. the mode select thresholds are shown in figure 6. the input circuitry forms a tristate switch with thresholds at 0.63 v and v ref + 0.23 v. the mode select input current is 10 a when connected to the reference output, and 42 a when connected to a v cc of 5.0 v, refer to figure 7. output stage the output stage uses a positive feedback base boost circuit for enhanced sink saturation, while maintaining a relatively low device standby current. figure 11 shows that the sink saturation voltage is about 0.2 v at 8.0 ma over temperature. by combining the low output saturation characteristics with low voltage comparator operation, this device is capable of sensing positive voltages at a v cc of 1.0 v. these characteristics are important in undervoltage sensing applications where the output must stay in a low state as v cc approaches ground. figure 5 shows the output voltage versus supply voltage in an undervoltage sensing application. note that as v cc drops below the programmed 4.5 v trip point, the output stays in a well defined active low state until v cc drops below 1.0 v. applications the following circuit figures illustrate the flexibility of this device. included are voltage sensing applications for over, under, and window detectors, as well as three unique configurations. many of the voltage detection circuits are shown with the open collector outputs of each channel connected together driving a light emitting diode (led). this ?ored? connection is shown for ease of explanation and it is only required for window detection applications. note that many of the voltage detection circuits are shown with a dashed line output connection. this connection gives the inverse function of the solid line connection. for example, the solid line output connection of figure 16 has the led ?on? when input voltage v s is above trip voltage v 2 , for overvoltage detection. the dashed line output connection has the led ?on? when v s is below trip voltage v 2 , for undervoltage detection.
mc34161, mc33161, ncv33161 http://onsemi.com 8 the above figure shows the mc34161 configured as a dual positive overvoltage detector. as the input voltage increases from grou nd, the led will turn ?on? when v s1 or v s2 exceeds v 2 . with the dashed line output connection, the circuit becomes a dual positive undervoltage detector. as the input voltage decre ases from the peak towards ground, the led will turn ?on? when v s1 or v s2 falls below v 1 . for known resistor values, the voltage trip points are: for a specific trip voltage, the required resistor ratio is: v 1 (v th v h ) r 2 r 1 1 v 2 v th r 2 r 1 1 r 2 r 1 v 1 v th v h 1 r 2 r 1 v 2 v th 1 figure 16. dual positive overvoltage detector 8 + 1.27v + 1.27v + 2.8v + 0.6v + - 2.54v reference - + - + + - 4 1 7 2 3 5 6 v s2 r 1 r 2 r 2 r 1 v cc input v s output voltage pins 5, 6 v 2 v 1 gnd v cc led `on' v hys gnd v s1 the above figure shows the mc34161 configured as a dual positive undervoltage detector. as the input voltage decreases towards ground, the led will turn ?on? when v s1 or v s2 falls below v 1 . with the dashed line output connection, the circuit becomes a dual positive overvoltage detector. as the input voltage increa ses from ground, the led will turn ?on? when v s1 or v s2 exceeds v 2 . v 1 (v th v h ) r 2 r 1 1 v 2 v th r 2 r 1 1 r 2 r 1 v 1 v th v h 1 r 2 r 1 v 2 v th 1 for known resistor values, the voltage trip points are: for a specific trip voltage, the required resistor ratio is: figure 17. dual positive undervoltage detector v s1 + 1.27v + 1.27v + 2.8v + 0.6v + - 8 - + - + + - 4 1 7 2 3 5 6 v s2 2.54v reference v cc r 1 r 2 r 2 r 1 v hys input v s output voltage pins 5, 6 v 2 v 1 gnd v cc led `on' gnd
mc34161, mc33161, ncv33161 http://onsemi.com 9 the above figure shows the mc34161 configured as a dual negative overvoltage detector. as the input voltage increases from grou nd, the led will turn ?on? when ? v s1 or ? v s2 exceeds v 2 . with the dashed line output connection, the circuit becomes a dual negative undervoltage detector. as the input voltage decre ases from the peak towards ground, the led will turn ?on? when ? v s1 or ? v s2 falls below v 1 . for known resistor values, the voltage trip points are: for a specific trip voltage, the required resistor ratio is: figure 18. dual negative overvoltage detector v 1 r 1 r 2 (v th v ref ) v th v 2 r 1 r 2 (v th v h v ref ) v th v h r 1 r 2 v 1 v th v th v ref r 1 r 2 v 2 v th v h v th v h v ref + 1.27v + 1.27v + 2.8v + 0.6v + - 2.54v reference - + - + + - 4 1 7 2 3 5 6 r1 -v s1 r1 -v s2 r 2 r 2 8 v cc input -v s output voltage pins 5, 6 gnd v 1 v 2 v cc led `on' v hys gnd the above figure shows the mc34161 configured as a dual negative undervoltage detector. as the input voltage decreases towards ground, the led will turn ?on? when ? v s1 or ? v s2 falls below v 1 . with the dashed line output connection, the circuit becomes a dual negative overvoltage detector. as the input voltage increa ses from ground, the led will turn ?on? when ? v s1 or ? v s2 exceeds v 2 . for known resistor values, the voltage trip points are: for a specific trip voltage, the required resistor ratio is: figure 19. dual negative undervoltage detector v 1 r 1 r 2 (v th v ref ) v th v 2 r 1 r 2 (v th v h v ref ) v th v h r 1 r 2 v 1 v th v th v ref r 1 r 2 v 2 v th v h v th v h v ref + 1.27v + 1.27v + 2.8v + 0.6v + - 8 - + - + + - 4 1 7 2 3 5 6 r1 -v s1 r1 -v s2 2.54v reference r 2 r 2 v cc v hys input -v s output voltage pins 5, 6 gnd v 1 v 2 v cc led `on' gnd
mc34161, mc33161, ncv33161 http://onsemi.com 10 the above figure shows the mc34161 configured as a positive voltage window detector. this is accomplished by connecting channel 1 as an undervoltage detector, and channel 2 as an overvoltage detector. when the input voltage v s falls out of the window established by v 1 and v 4 , the led will turn ?on?. as the input voltage falls within the window, v s increasing from ground and exceeding v 2 , or v s decreasing from the peak towards ground and falling below v 3 , the led will turn ?off?. with the dashed line output connection, the led will turn ?on? when the input voltage v s is within the window. for known resistor values, the voltage trip points are: for a specific trip voltage, the required resistor ratio is: figure 20. positive voltage window detector v 1 (v th1 v h1 ) r 3 r 1 r 2 1 v 3 (v th2 v h2 ) r 2 r 3 r 1 1 v 2 v th1 r 3 r 1 r 2 1 v 4 v th2 r 2 r 3 r 1 1 r 2 r 1 v 3 (v th2 v h2 ) v 1 (v th1 v h1 ) 1 r 3 r 1 v 3 (v 1 v th1 v h1 ) v 1 (v th2 v h2 ) r 2 r 1 v 4 xv th1 v 2 xv th2 1 r 3 r 1 v 4 (v 2 v th1 ) v 2 xv th2 + 1.27v + 1.27v + 2.8v + 0.6v + - 2.54v reference - + - + + - 4 1 7 2 3 5 6 v s r 3 r 1 r 2 8 v cc output voltage pins 5, 6 gnd ch2 ch1 led `on' v hys2 v hys1 led `on' `off' led `off' `on' v 4 v 3 v 2 v 1 v cc gnd input v s the above figure shows the mc34161 configured as a negative voltage window detector. when the input voltage ? v s falls out of the window established by v 1 and v 4 , the led will turn ?on?. as the input voltage falls within the window, ? v s increasing from ground and exceeding v 2 , or ? v s decreasing from the peak towards ground and falling below v 3 , the led will turn ?off?. with the dashed line output connection, the led will turn ?on? when the input voltage ? v s is within the window. for known resistor values, the voltage trip points are: for a specific trip voltage, the required resistor ratio is: figure 21. negative voltage window detector v 1 r 1 (v th2 v ref ) r 2 r 3 v th2 v 2 r 1 (v th2 v h2 v ref ) r 2 r 3 v th2 v h2 v 3 (r 1 r 2 )(v th1 v ref ) r 3 v th1 v 4 (r 1 r 2 )(v th1 v h1 v ref ) r 3 v th1 v h1 r 1 r 2 r 3 v 1 v th2 v th2 v ref r 1 r 2 r 3 v 2 v th2 v h2 v th2 v h2 v ref r 3 r 1 r 2 v th1 v ref v 3 v th1 r 3 r 1 r 2 v th1 v h1 v ref v 4 v h1 v th1 + 1.27v + 1.27v + 2.8v + 0.6v + - - + - + + - 4 1 7 2 3 5 6 2.54v reference r 3 r 1 r 2 -v s 8 v cc output voltage pins 5, 6 gnd ch2 ch1 v 1 v 2 v 3 v 4 v cc gnd input -v s led `on' led `on' `off' led `off' `on' v hys1 v hys2
mc34161, mc33161, ncv33161 http://onsemi.com 11 the above figure shows the mc34161 configured as a positive and negative overvoltage detector. as the input voltage increases f rom ground, the led will turn ?on? when either ? v s1 exceeds v 2 , or v s2 exceeds v 4 . with the dashed line output connection, the circuit becomes a positive and negative undervoltage detector. as the input voltage decreases from the peak towards ground, the led will turn ?on? when either v s2 falls below v 3 , or ? v s1 falls below v 1 . for known resistor values, the voltage trip points are: for a specific trip voltage, the required resistor ratio is: figure 22. positive and negative overvoltage detector v 1 r 3 r 4 (v th1 v ref ) v th1 v 2 r 3 r 4 (v th1 v h1 v ref ) v th1 v h1 v 3 (v th2 v h2 ) r 2 r 1 1 v 4 v th2 r 2 r 1 1 r 3 r 4 (v 1 v th1 ) (v th1 v ref ) r 3 r 4 (v 2 v th1 v h1 ) (v th1 v h1 v ref ) r 2 r 1 v 4 v th2 1 r 2 r 1 v 3 v th2 v h2 1 + 1.27v + 1.27v + 2.8v + 0.6v + - 2.54v reference - + - + + - 4 1 7 2 3 5 6 r 4 r 3 -v s1 v s2 r 1 r2 8 v cc output voltage pins 5, 6 gnd led `on' v hys2 v hys1 v cc gnd input -v s1 v 4 v 3 v 1 v 2 input v s2 the above figure shows the mc34161 configured as a positive and negative undervoltage detector. as the input voltage decreases toward ground, the led will turn ?on? when either v s1 falls below v 1 , or ? v s2 falls below v 3 . with the dashed line output connection, the circuit becomes a positive and negative overvoltage detector. as the input voltage increases from the ground, the led will turn ?on? when either v s1 exceeds v 2 , or ? v s1 exceeds v 1 . for known resistor values, the voltage trip points are: for a specific trip voltage, the required resistor ratio is: figure 23. positive and negative undervoltage detector v 1 (v th1 v h1 ) r 4 r 3 1 v 2 v th1 r 4 r 3 1 v 3 r 1 r 2 (v th v ref ) v th2 v 4 r 1 r 2 (v th v h2 v ref ) v th2 v h2 r 4 r 3 v 2 v th1 1 r 4 r 3 v 1 v th1 v h1 1 r 1 r 2 v 4 v h2 v th2 v th2 v h2 v ref r 1 r 2 v 3 v th2 v th2 v ref + 1.27v + 1.27v + 2.8v + 0.6v + - - + - + + - 4 1 7 2 3 5 6 2.54v reference 8 v cc r 3 v s1 r 4 r 1 r 2 -v s2 v 2 v 1 v 3 v 4 gnd v cc gnd output voltage pins 5, 6 input -v s2 input v s1 led `on' v hys2 v hys1
mc34161, mc33161, ncv33161 http://onsemi.com 12 the above figure shows the mc34161 configured as an overvoltage detector with an audio alarm. channel 1 monitors input voltage v s while channel 2 is connected as a simple rc oscillator. as the input voltage increases from ground, the output of channel 1 allows the oscillator to turn ?o n? when v s exceeds v 2 . for known resistor values, the voltage trip points are: for a specific trip voltage, the required resistor ratio is: figure 24. overvoltage detector with audio alarm v 1 (v th v h ) r 2 r 1 1 v 2 v th r 2 r 1 1 r 2 r 1 v 1 v th v h 1 r 2 r 1 v 2 v th 1 + 1.27v + 1.27v + 2.8v + 0.6v + - 2.54v reference - + - + + - 4 1 7 2 3 5 6 8 v cc r a v s r 1 r 2 r b c t v 2 v 1 input v s output voltage pins 5, 6 gnd v cc gnd osc `on' v hys piezo the above figure shows the mc34161 configured as a microprocessor reset with a time delay. channel 2 monitors input voltage v s while channel 1 performs the time delay function. as the input voltage decreases towards ground, the output of channel 2 quickly discharges c dly when v s falls below v 1 . as the input voltage increases from ground, the output of channel 2 allows r dly to charge c dly when v s exceeds v 2 . for known resistor values, the voltage trip points are: for a specific trip voltage, the required resistor ratio is: figure 25. microprocessor reset with time delay v 1 (v th v h ) r 2 r 1 1 v 2 v th r 2 r 1 1 for known r dly c dly values, the reset time delay is: r 2 r 1 v 1 v th v h 1 r 2 r 1 v 2 v th 1 + 1.27v + 1.27v + 2.8v + 0.6v + - - + - + + - 4 1 7 2 3 5 6 2.54v reference 8 v cc r 3 r dly v s r 1 r 2 c dly input v s output voltage pin 6 v 2 v 1 gnd v cc gnd v cc gnd v hys t dly reset led `on' output voltage pin 5 1 1 ? v th v cc t dly = r dly c dly in
mc34161, mc33161, ncv33161 http://onsemi.com 13 t figure 26. automatic ac line voltage selector + 1.27v + 1.27v + 2.8v + 0.6v + - 2.54v reference - + - + + - 4 1 7 2 3 5 6 8 10k + 220 250v 10k 1.2k 100k 1.6m + 10 10k 3w mr506 3.0a input 92 vac to 276 vac 1n 4742 b+ rtn + 47 + 220 250v 75k 75k mac 228a6fp the above circuit shows the mc34161 configured as an automatic line voltage selector. the ic controls the triac, enabling the c ircuit to function as a fullwave voltage doubler or a fullwave bridge. channel 1 senses the negative half cycles of the ac line voltage. if the li ne voltage is less than150 v, the circuit will switch from bridge mode to voltage doubling mode after a preset time delay. the delay is controlled by the 100 k resistor and the 10 f capacitor. if the line voltage is greater than 150 v, the circuit will immediately return to fullwave bridge mode.
mc34161, mc33161, ncv33161 http://onsemi.com 14 figure 27. step ? down converter + 1.27v + 1.27v + 2.8v + 0.6v + - 2.54v reference - + - + + - 4 1 7 2 3 5 6 8 0.005 470 0.01 1.8k + 330 v in 12v 4.7k 1.6k 0.01 47k 1n5819 mps750 470 h + 1000 v o 5.0v/250ma test conditions results line regulation v in = 9.5 v to 24 v, i o = 250 ma 40 mv = 0.1% load regulation v in = 12 v, i o = 0.25 ma to 250 ma 2.0 mv = 0.2% output ripple v in = 12 v, i o = 250 ma 50 mvpp efficiency v in = 12 v, i o = 250 ma 87.8% the above figure shows the mc34161 configured as a step ? down converter. channel 1 monitors the output voltage while channel 2 performs the oscillator function. upon initial powerup, the converters output voltage will be below nominal, and the output o f channel 1 will allow the oscillator to run. the external switch transistor will eventually pump ? up the output capacitor until its voltage exceeds the input threshold of channel 1. the output of channel 1 will then switch low and disable the oscillator. the oscillator will commence operation when the output voltage falls below the lower threshold of channel 1.
mc34161, mc33161, ncv33161 http://onsemi.com 15 ordering information device package shipping ? mc34161d soic ? 8 98 units/rail mc34161dg soic ? 8 (pb ? free) mc34161dr2 soic ? 8 2500/tape & reel mc34161dr2g soic ? 8 (pb ? free) mc34161dmr2 micro8 4000/tape & reel mc34161dmr2g micro8 (pb ? free) mc34161p pdip ? 8 50 units/rail mc34161pg pdip ? 8 (pb ? free) mc33161d soic ? 8 98 units/rail mc33161dg soic ? 8 (pb ? free) mc33161dr2 soic ? 8 2500/tape & reel mc33161dr2g soic ? 8 (pb ? free) mc33161dmr2 micro8 4000/tape & reel mc33161dmr2g micro8 (pb ? free) mc33161p pdip ? 8 50 units/rail mc33161pg pdip ? 8 (pb ? free) ncv33161dr2* soic ? 8 2500/tape & reel NCV33161DR2G* soic ? 8 (pb ? free) ?for information on tape and reel specifications, including part orientation and tape sizes, please refer to our tape and reel packaging specifications brochure, brd8011/d. *ncv: t low = ? 40 c, t high = +125 c. guaranteed by design. ncv prefix is for automotive and other applications requiring site and control changes.
mc34161, mc33161, ncv33161 http://onsemi.com 16 package dimensions notes: 1. dimension l to center of lead when formed parallel. 2. package contour optional (round or square corners). 3. dimensioning and tolerancing per ansi y14.5m, 1982. 14 5 8 f note 2 ? a ? ? b ? ? t ? seating plane h j g d k n c l m m a m 0.13 (0.005) b m t dim min max min max inches millimeters a 9.40 10.16 0.370 0.400 b 6.10 6.60 0.240 0.260 c 3.94 4.45 0.155 0.175 d 0.38 0.51 0.015 0.020 f 1.02 1.78 0.040 0.070 g 2.54 bsc 0.100 bsc h 0.76 1.27 0.030 0.050 j 0.20 0.30 0.008 0.012 k 2.92 3.43 0.115 0.135 l 7.62 bsc 0.300 bsc m --- 10 --- 10 n 0.76 1.01 0.030 0.040 pdip ? 8 case 626 ? 05 issue l
mc34161, mc33161, ncv33161 http://onsemi.com 17 package dimensions soic ? 8 nb case 751 ? 07 issue aj seating plane 1 4 5 8 n j x 45 k notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimension a and b do not include mold protrusion. 4. maximum mold protrusion 0.15 (0.006) per side. 5. dimension d does not include dambar protrusion. allowable dambar protrusion shall be 0.127 (0.005) total in excess of the d dimension at maximum material condition. 6. 751 ? 01 thru 751 ? 06 are obsolete. new standard is 751 ? 07. a b s d h c 0.10 (0.004) dim a min max min max inches 4.80 5.00 0.189 0.197 millimeters b 3.80 4.00 0.150 0.157 c 1.35 1.75 0.053 0.069 d 0.33 0.51 0.013 0.020 g 1.27 bsc 0.050 bsc h 0.10 0.25 0.004 0.010 j 0.19 0.25 0.007 0.010 k 0.40 1.27 0.016 0.050 m 0 8 0 8 n 0.25 0.50 0.010 0.020 s 5.80 6.20 0.228 0.244 ? x ? ? y ? g m y m 0.25 (0.010) ? z ? y m 0.25 (0.010) z s x s m 1.52 0.060 7.0 0.275 0.6 0.024 1.270 0.050 4.0 0.155 mm inches scale 6:1 *for additional information on our pb ? free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. soldering footprint*
mc34161, mc33161, ncv33161 http://onsemi.com 18 package dimensions micro8 case 846a ? 02 issue g s b m 0.08 (0.003) a s t notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimension a does not include mold flash, protrusions or gate burrs. mold flash, protrusions or gate burrs shall not exceed 0.15 (0.006) per side. 4. dimension b does not include interlead flash or protrusion. interlead flash or protrusion shall not exceed 0.25 (0.010) per side. 5. 846a-01 obsolete, new standard 846a-02. b e pin 1 id 8 pl 0.038 (0.0015) ? t ? seating plane a a1 c l *for additional information on our pb ? free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. soldering footprint* 8x 8x 6x mm inches scale 8:1 1.04 0.041 0.38 0.015 5.28 0.208 4.24 0.167 3.20 0.126 0.65 0.0256 dim a min nom max min millimeters ?? ?? 1.10 ?? inches a1 0.05 0.08 0.15 0.002 b 0.25 0.33 0.40 0.010 c 0.13 0.18 0.23 0.005 d 2.90 3.00 3.10 0.114 e 2.90 3.00 3.10 0.114 e 0.65 bsc l 0.40 0.55 0.70 0.016 ?? 0.043 0.003 0.006 0.013 0.016 0.007 0.009 0.118 0.122 0.118 0.122 0.026 bsc 0.021 0.028 nom max 4.75 4.90 5.05 0.187 0.193 0.199 h e h e d d e on semiconductor and are registered trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to mak e changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for an y particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including wi thout limitation special, consequential or incidental damages. ?typical? parameters which may be provided in scillc data sheets and/or specifications can and do vary in different application s and actual performance may vary over time. all operating parameters, including ?typicals? must be validated for each customer application by customer?s technical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its of ficers, employees, subsidiaries, af filiates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, direct ly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws and is not for resale in any manner. publication ordering information n. american technical support : 800 ? 282 ? 9855 toll free usa/canada europe, middle east and africa technical support: phone: 421 33 790 2910 japan customer focus center phone: 81 ? 3 ? 5773 ? 3850 mc34161/d micro8 is a trademark of international rectifier. literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 303 ? 675 ? 2175 or 800 ? 344 ? 3860 toll free usa/canada fax : 303 ? 675 ? 2176 or 800 ? 344 ? 3867 toll free usa/canada email : orderlit@onsemi.com on semiconductor website : www.onsemi.com order literature : http://www.onsemi.com/orderlit for additional information, please contact your local sales representative

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