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general description the max7384 dual-speed silicon oscillator replaces ceramic resonators, crystals, and crystal-oscillator modules as the primary and secondary clock source for microcontrollers in 3v, 3.3v, and 5v applications. the max7384 features a factory-programmed high-speed oscillator, a 32.768khz oscillator, a clock enable input, a clock-selector input, and a ? power-on-reset (por) supervisor. the clock output can be switched at any time between the high-speed clock and the 32.768khz clock for low-power operation. switchover is synchro- nized internally to provide glitch-free clock switching. unlike typical crystal and ceramic-resonator oscillator circuits, the max7384 is resistant to vibration and emi. the high-output-drive current and absence of high- impedance nodes makes the oscillator less susceptible to dirty or humid operating conditions. with a wide oper- ating temperature range as the max7384 is a good choice for demanding home appliance, industrial, and automotive environments. the max7384 is available with factory-programmed fre- quencies ranging from 10mhz to 16mhz. see table 1 for standard frequencies and contact the factory for custom frequencies and por thresholds. the max7384 is available in an 8-pin ?ax package. the max7384 operating temperature range is -40? to +125?. applications white goods automotive consumer products appliances and controls handheld products portable equipment microcontroller systems features ? 2.7v to 5.5v operation ? high-speed oscillator from 10mhz to 16mhz ? low-speed 32.768khz oscillator ? glitch-free clock-speed switching ? integrated por (factory programmable) ? 10ma clock-output drive capability ? 2.5% initial accuracy ? typical 4.5ma operating current at 16mhz ? typical 0.5 a shutdown supply current ? typical 13 a operating current at 32.768khz ? 100ppm/c frequency drift ? clock enable input ? 50% duty cycle ? 5ns output rise and fall time ? -40c to +125c temperature range max7384 silicon oscillator with low-power frequency select, reset output, and enable ________________________________________________________________ maxim integrated products 1 ordering information osc1 osc2 rst c gnd rst clock enable v cc 0.1 f v cc 2.7v to 5.5v max7384 v l 0.1 f i/o port speed typical application circuit 19-3493; rev 2; 4/07 for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. part* temp range pin- package reset output max7384b_ _ _ -40 c to +125 c 8 ?ax active low push-pull max7384c_ _ _ -40 c to +125 c 8 max open drain * standard version is shown in bold. the first letter after the part number designates the reset output option. insert the letter corresponding to the desired reset threshold level from table 1 in the next position. insert the two-letter code from table 2 in the remaining two positions for the desired frequency range. table 1 and table 2 are located at the end of the data sheet. pin configuration appears at end of data sheet. ?ax is a registered trademark of maxim integrated products, inc.
max7384 silicon oscillator with low-power frequency select, reset output, and enable 2 _______________________________________________________________________________________ absolute maximum ratings stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. v cc to gnd ...........................................................-0.3v to +6.0v all other pins to gnd.................................-0.3v to (v cc + 0.3v) clock, rst current .......................................................?0ma input current (speed, enable) ......................................?0ma continuous power dissipation (t a = +70?) 8-pin max (derate 4.5mw/? above +70?) ... 362mw (u8-1) operating temperature range .........................-40? to +125? junction temperature ......................................................+150? storage temperature range .............................-65? to +150? lead temperature (soldering, 10s) .................................+300? electrical characteristics ( typical operating circuit , v cc = 2.7v to 5.5v, v l = v cc , t a = -40? to +125?. typical values are at v cc = 5.0v, t a = +25?, unless otherwise noted.) (notes 1 and 2) parameter symbol conditions min typ max units operating supply voltage v cc , v l 2.7 5.5 v f clock = 16mhz, v cc = 5.5v, no load 8.7 f clock = 14mhz, v cc = 5.5v, no load 8.0 f clock = 12mhz, v cc = 5.5v, no load 6.5 f clock = 11mhz, v cc = 5.5v, no load 6.0 f clock = 10mhz, v cc = 5.5v, no load 5.4 ma operating supply current i cc + i l f clock = 32.768khz, v cc = 5.5v, no load 13 25 ? shutdown supply current i shdn enable = 0v; i shdn = i cc + i l 0.5 1 a logic inputs (speed, enable) input high voltage v ih 0.7 x v cc v input low voltage v il 0.3 x v cc v input current i in v cc = v speed = v enable = 5.5v 2 a clock output v cc = 4.5v, i source = 7.0ma output high voltage v oh v cc = 3.0v, i source = 2.0ma for max7384xsxx v cc - 0.4 v v cc = 4.5v, i sink = 20ma output low voltage v ol v cc = 3.0v, i sink = 10ma 0.4 v v cc = 5v (for max7384xmxx) or v cc = 3.3v (for max7384xsxx), t a = +25?, deviation from nominal frequency -2.5 +2.5 fast clock frequency accuracy f clock v cc = 3.0v to 5.5v, t a = +25?, deviation from nominal frequency -5.0 +3.5 % fast clock temperature coefficient (note 3) ?00 ?50 p p m /c v cc = 5v (for max7384xmxx) or v cc = 3.3v (for max7384xsxx), t a = +25? 32.268 32.768 33.268 slow clock frequency f clock v cc = 3.0v to 5.5v, t a = +25? 31.768 32.768 33.768 khz
max7384 silicon oscillator with low-power frequency select, reset output, and enable _______________________________________________________________________________________ 3 electrical characteristics (continued) ( typical operating circuit , v cc = 2.7v to 5.5v, v l = v cc , t a = -40? to +125?. typical values are at v cc = 5.0v, t a = +25?, unless otherwise noted.) (notes 1 and 2) parameter symbol conditions min typ max units slow clock temperature coefficient (note 3) ?0 ?25 p p m /c duty cycle (note 3) 40 50 60 % output period jitter j p f out = 16mhz; ? period jitter ?40 ps output rise time t r 10% to 90%, c l = 10pf 5 ns output fall time t f 90% to 10%, c l = 10pf 5 ns t a = +25? -2 +2 power-on-reset threshold accuracy v cc rising, deviation from nominal threshold (v th ) (table 1) -5 +5 % power-on-reset hysteresis difference between rising and falling thresholds 1% power-on-reset delay pordly v cc rising from 0 to 5v in 1? at +25? 122 ? reset output ( rst ) v cc = 4.5v, i source = 7.0ma (max7384xmxx) output high voltage (note 4) v oh v cc = 3.0v, i source = 2.0ma (max7384xsxx) v cc - 0.4 v v cc = 4.5v, i sink = 20ma (max7384xmxx) output low voltage v ol v cc = 3.0v, i sink = 10ma (max7384xsxx) 0.4 v note 1: all parameters tested at t a = +25?. specifications over temperature are guaranteed by design. note 2: oscillator is enabled when v cc > v th . note 3: guaranteed by design. not production tested. note 4: for push-pull output only.
max7384 silicon oscillator with low-power frequency select, reset output, and enable 4 _______________________________________________________________________________________ typical operating characteristics (v cc = v l = v enable = v speed = 5v, t a = +25?, frequency = 10mhz, unless otherwise noted.) 48.0 48.5 49.5 49.0 50.0 50.5 -55 21 -17 59 97 135 duty cycle vs. temperature max7384 toc01 temperature ( c) duty cycle (%) frequency = 10mhz 45 47 46 49 48 50 51 2.7 3.9 4.3 3.1 3.5 4.7 5.1 5.5 duty cycle vs. supply voltage max7384 toc02 supply voltage (v) duty cycle (%) frequency = 11mhz 2.90 3.00 2.95 3.10 3.05 3.20 3.15 3.25 -55 21 59 -17 97 135 supply current vs. temperature max7384 toc03 temperature ( c) supply current (ma) frequency = 10mhz 1.5 2.0 3.0 2.5 3.5 4.0 2.7 3.5 3.1 3.9 4.3 4.7 5.1 5.5 supply current vs. supply voltage max7384 toc04 supply voltage (v) supply current (ma) frequency = 11mhz -2.0 -1.0 -1.5 0 -0.5 1.5 1.0 0.5 2.0 2.7 3.5 3.1 3.9 4.3 4.7 5.1 5.5 frequency deviation vs. supply voltage max7384 toc05 supply voltage (v) frequency deviation (%) frequency = 11mhz -4 -3 -2 -1 0 1 2 3 4 -55 -17 21 59 97 135 frequency deviation vs. temperature max7384 toc06 temperature ( c) frequency = 10mhz frequency deviation (%) channel 1 = clock, channel 2 = v cc 10 s/div settling time from start max7384 toc07 ch1 freq 9.992mhz low resolution ch2 2v/div ch1 2v/div clock output waveform (c l = 10pf) max7384 toc08 20ns/div 2v/div clock output waveform (c l = 50pf) max7384 toc09 20ns/div 2v/div
max7384 silicon oscillator with low-power frequency select, reset output, and enable _______________________________________________________________________________________ 5 clock output waveform (c l = 100pf) max7384 toc10 20ns/div 2v/div 5 4 3 2 1 10 13 11 12 14 15 16 supply current vs. frequency max7384 toc11 frequency (mhz) supply current (ma) maximum transient duration vs. reset threshold overdrive max7384 toc12 reset threshold overdrive (v) maximum transient duration (s) 0.19 0.14 0.09 10 100 1m 10m 0.1 1 1 0.04 0.24 v reset = 4.32v channel 1 = clock, channel 2 = speed 10 s/div high-speed to low-speed transition max7384 toc13 2v/div 2v/div ch2 ch1 channel 1 = clock, channel 2 = speed 40ns/div high-speed to low-speed transition max7384 toc14 2v/div 2v/div ch2 ch1 channel 1 = clock, channel 2 = speed 10 s/div low-speed to high-speed transition max7384 toc15 2v/div ch2 2v/div ch1 channel 1 = clock, channel 2 = speed 100ns/div low-speed to high-speed transition max7384 toc16 ch2 2v/div ch1 2v/div typical operating characteristics (continued) (v cc = v l = v enable = v speed = 5v, t a = +25?, frequency = 10mhz, unless otherwise noted.)
max7384 detailed description the max7384 is a dual-speed clock generator with inte- grated reset for microcontrollers (?s) and uarts in 3v, 3.3v, and 5v applications. the max7384 is a replace- ment for crystal-oscillator modules, crystals, or ceramic resonators and a system reset ic. the high-speed clock frequency and reset threshold voltage are factory pro- grammed to specific values (see tables 1 and 2). a vari- ety of popular standard frequencies are available. the low-speed clock frequency is fixed at 32.768khz. no external components are required for setting or adjusting the frequency. oscillator the push-pull clock output is enabled when v cc > v th (table 1) and drives a load to within 400mv of either supply rail. the clock output remains stable over the full operating voltage range and does not generate short output cycles during either power-on or changing of the frequency. a typical oscillating startup is shown in the typical operating characteristics . enable input the max7384 has an active-high enable input that con- trols the clock and reset outputs. the clock output is driven low and rst asserts when the device is dis- abled. drive enable low to disable the clock output on the next rising edge. drive enable high to activate the clock output. clock-speed selection drive speed low to select slow clock speed (nominally 32.768khz) or high to select full clock speed. speed can be connected to v cc or to gnd to select fast or slow clock speed, or connected to a logic output (such as a ? gpio port) used to change clock speed on the fly. if speed is connected to a ? gpio port, connect a pullup or pulldown resistor to set the clock to the preferred speed on power-up. speed input bias current is 2? (max), so a resistor value as high as 100k ? can be used. applications information interfacing to a microcontroller clock input the max7384 clock output is a push-pull, cmos, logic output that directly drives a ? or ? clock input. there are no impedance-matching issues when using the max7384. refer to the microcontroller data sheet for clock input compatibility with external clock signals. the max7384 requires no biasing components or load capacitance. when using the max7384 to retrofit a crystal oscillator, remove all biasing components from the oscillator input. silicon oscillator with low-power frequency select, reset output, and enable 6 _______________________________________________________________________________________ max7384 rst clock 10mhz to 16mhz (hf oscillator) por v cc 2.7v to 5.5v gnd 32khz (lf oscillator) v l mux logic speed enable figure 1. functional diagram pin description pin name function 1v cc positive supply voltage. bypass v cc to gnd with a 0.1? capacitor. 2v l output supply voltage. bypass v l to gnd with a 0.1? capacitor. v l must be connected to v cc . 3 speed clock-speed select input. drive speed low to select the 32.768khz fixed frequency. drive speed high to select factory-trimmed frequency. 4 rst reset output. open-drain or push-pull output. see the ordering information. 5 clock push-pull clock output 6 gnd ground 7 enable active-high clock enable input. see the enable input section for more details. 8 n.c. no connection
reset output the max7384 is available with two reset output stage options: push-pull active low and open-drain active low. rst is asserted when the monitored input (v cc ) drops below the internal v th threshold and remains asserted for 120? after the monitored input exceeds the internal v th threshold. the open-drain rst output requires an external pullup resistor. under a reset condition, the oscillator is turned off. output jitter the max7384? jitter performance is given in the electrical characteristics table as a ? period jitter value. jitter measurements are approximately propor- tional to the output period of the device. the jitter perfor- mance of all clock sources degrades in the presence of mechanical and electrical interference. the max7384 is relatively immune to vibration, shock, and emi influences and thus provides a considerably more robust clock source than crystal or ceramic resonator-based oscilla- tor circuits. initial power-up and operation an internal power-up reset asserts rst until the supply voltage has risen above the power-on-reset threshold (v th ). rst holds the microcontroller in a reset condition until 120? after v cc has risen above v th . this reset delay ensures that the clock output and the microcon- troller? internal clock circuits have stabilized before the system is allowed to start. typical microcontroller reset delay ranges from 1ms to 250ms to allow a slow crystal oscillator circuit to start up. the max7384 has a fast startup, eliminating the need for such a long reset delay. power-supply considerations the max7384 operates with a 2.7v and 5.5v power- supply voltage. v cc provides power to the the internal circuitry and v l supplies power to the clock and reset outputs. good power-supply decoupling is needed to maintain the power-supply rejection performance of the max7384. bypass both v cc and v l to gnd with a 0.1? surface-mount ceramic capacitor. mount the bypassing capacitors as close to the device as possi- ble. use a larger value bypass capacitor if the max7384 is to operate with a large capacitive load. use a bypass capacitor value of at least 1000 times that of the output load capacitance. max7384 silicon oscillator with low-power frequency select, reset output, and enable _______________________________________________________________________________________ 7 part reset threshold (v) frequency (mhz) max7384csuk 2.89 10 max7384csut 2.89 11 max7384csvb 2.89 12 max7384csvt 2.89 14 max7384cswb 2.89 16 max7384cmuk 4.38 10 max7384cmut 4.38 11 max7384cmvb 4.38 12 max7384cmvt 4.38 14 max7384cmwb 4.38 16 table 3. standard part numbers suffix reset threshold (v) (v th ) s 2.89 standard value m 4.38 standard value table 1. standard reset threshold levels suffix standard frequency (mhz) uk 10 ut 11 vb 12 vt 14 wb 16 table 2. standard frequencies contact factory for nonstandard reset threshold options of 2.5v < v th < 4.38v. for all other frequency options, contact factory.
max7384 silicon oscillator with low-power frequency select, reset output, and enable 8 _______________________________________________________________________________________ top view gnd clock rst 1 2 8 7 n.c. enable v l speed v cc max 3 4 6 5 max7384 pin configuration chip information process: bicmos
max7384 silicon oscillator with low-power frequency select, reset output, and enable maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 _____________________ 9 2007 maxim integrated products is a registered trademark of maxim integrated products, inc. max7384 package information (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .) 8lumaxd.eps package outline, 8l umax/usop 1 1 21-0036 j rev. document control no. approval proprietary information title: max 0.043 0.006 0.014 0.120 0.120 0.198 0.026 0.007 0.037 0.0207 bsc 0.0256 bsc a2 a1 c e b a l front view side view e h 0.60.1 0.60.1 ?0.500.1 1 top view d 8 a2 0.030 bottom view 1 6 s b l h e d e c 0 0.010 0.116 0.116 0.188 0.016 0.005 8 4x s inches - a1 a min 0.002 0.95 0.75 0.5250 bsc 0.25 0.36 2.95 3.05 2.95 3.05 4.78 0.41 0.65 bsc 5.03 0.66 6 0 0.13 0.18 max min millimeters - 1.10 0.05 0.15 dim revision history pages changed at rev 2: 1?
e nglish ? ???? ? ??? ? ??? what's ne w p roducts solutions de sign ap p note s sup p ort buy comp any me mbe rs max7384 part number table notes: see the max7384 quickview data sheet for further information on this product family or download the max7384 full data sheet (pdf, 264kb). 1. other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales . 2. didn't find what you need? ask our applications engineers. expert assistance in finding parts, usually within one business day. 3. part number suffixes: t or t&r = tape and reel; + = rohs/lead-free; # = rohs/lead-exempt. more: see full data sheet or part naming c onventions . 4. * some packages have variations, listed on the drawing. "pkgc ode/variation" tells which variation the product uses. 5. part number free sample buy direct package: type pins size drawing code/var * temp rohs/lead-free? materials analysis max7384c ryn-t -40c to +125c rohs/lead-free: no max7384c ruk-t -40c to +125c rohs/lead-free: no max7384c rvb-t -40c to +125c rohs/lead-free: no max7384c myn-t -40c to +125c rohs/lead-free: no max7384c mwb-t -40c to +125c rohs/lead-free: no max7384c rvt-t -40c to +125c rohs/lead-free: no max7384c mvt-t -40c to +125c rohs/lead-free: no
max7384c mvb-t -40c to +125c rohs/lead-free: no max7384c rwb-t -40c to +125c rohs/lead-free: no max7384c mut-t -40c to +125c rohs/lead-free: no max7384c muk-t -40c to +125c rohs/lead-free: no max7384c rut-t -40c to +125c rohs/lead-free: no max7384c rwb -40c to +125c rohs/lead-free: no max7384c rvt -40c to +125c rohs/lead-free: no max7384c ryn -40c to +125c rohs/lead-free: no max7384c rvb -40c to +125c rohs/lead-free: no max7384c rut -40c to +125c rohs/lead-free: no max7384c ruk -40c to +125c rohs/lead-free: no max7384c myn -40c to +125c rohs/lead-free: no max7384c mwb -40c to +125c rohs/lead-free: no max7384c mvt -40c to +125c rohs/lead-free: no max7384c mvb -40c to +125c rohs/lead-free: no max7384c mut -40c to +125c rohs/lead-free: no didn't find what you need?
max7384c muk -40c to +125c rohs/lead-free: no didn't find what you need? c ontac t us: send us an email c opyright 2 0 0 7 by m axim i ntegrated p roduc ts , dallas semic onduc tor ? legal n otic es ? p rivac y p olic y

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