Part Number Hot Search : 
NX3L2267 AM7204A WE9140A DWR2G 0ETTT NESW064T T54ACS CA3146E
Product Description
Full Text Search
 

To Download MAX16054 Datasheet File

  If you can't view the Datasheet, Please click here to try to view without PDF Reader .  
 
 


  Datasheet File OCR Text:
  general description the MAX16054 is a pushbutton on/off controller with a single switch debouncer and built-in latch. it accepts a noisy input from a mechanical switch and produces a clean latched digital output after a factory-fixed qualifi- cation delay. the MAX16054 eliminates contact bounce during switch opening and closing. the state of the output changes only when triggered by the falling edge of the debounced switch input; the output remains unchanged on the rising edge of the input. robust switch inputs handle ?5v levels and are ?5kv esd protected for use in harsh industrial environments. the MAX16054 features a complementary output, out , which is the inverted state of out. an asynchronous clear input allows an external signal to force the output flip-flop low. undervoltage-lockout circuitry ensures that out is in the off state upon power-up. the MAX16054 requires no external components, and its low supply current makes it ideal for use in portable equipment. the MAX16054 operates from a +2.7v to +5.5v single supply. the MAX16054 is offered in a 6-pin thin sot23 package and operates over the -40? to +125? auto- motive temperature range. applications pdas mp3/video players portable electronics set-top boxes portable instrumentation white goods features  robust inputs can handle power supplies up to ?5v  ?5kv esd protection  latched output  low 7? supply current  operates from 2.7v to 5.5v  -40? to +125? temperature range  thin sot23 package MAX16054 on/off controller with debounce and 15kv esd protection ________________________________________________________________ maxim integrated products 1 gnd out clear 1 + 6v cc 5 out in MAX16054 thin sot23 top view 2 34 pin configuration ordering information MAX16054 out 3v ldo p en out in clear gnd on/off with ldo v cc typical operating circuits 19-4128; rev 0; 5/08 for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. + denotes a lead-free package. t = tape and reel package. devices are offered in 2.5k unit increments. part temp range pin- package top mark MAX16054azt+t -40? to +125? 6 thin sot23 +aadu typical operating circuits continued at end of data sheet.
MAX16054 on/off controller with debounce and 15kv esd protection 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v cc = +2.7v to +5.5v, t a = t j = -40? to +125?, unless otherwise noted. typical values are at v cc = +5v, t a = +25?.) (note 2) 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. note 1: as per jedec 51 standard, multilayer board (pcb). note 2: all devices are 100% production tested at t a = +25?. specifications over temperature limits are guaranteed by design. note 3: out is guaranteed to be low for 1.0v v cc v uvlo . v cc to gnd ..............................................................-0.3v to +6v in to gnd ................................................................-30v to +30v clear to gnd .........................................................-0.3v to +6v out, out to gnd......................................-0.3v to (v cc + 0.3v) short-circuit duration out, out to gnd ...................................................continuous continuous power dissipation (t a = +70?) 6-pin thin sot23 (derate 9.1mw/? at +70?) (note 1) ............................727mw operating temperature range .........................-40? to +125? maximum junction temperature .....................................+150? storage temperature range .............................-60? to +150? lead temperature (soldering, 10s) .................................+300? parameter symbol conditions min typ max units operating voltage range v cc (note 3) 2.7 5.5 v supply current i cc v cc = 5v, i out = i out = 0, in not connected 720a t a = +25? 20 50 80 debounce duration t dp t a = -40? to +125? 5 50 99 ms v il 0.65 v cc = 5v 2.5 in threshold v ih v cc = 2.7v 2.0 v in hysteresis 420 mv in pullup resistance 32 63 100 k v in = +25v +1.5 in current i in v in = -25v -1.5 ma in voltage range v in -25 +25 v undervoltage-lockout threshold v uvlo v cc falling 1.8 2.4 v v ol i sink = 1.6ma 0.4 out/ out output voltage v oh i source = 0.4ma v cc - 1.0 v v clear_il 0.7 v cc = 5v 2.4 clear threshold v clear_ih v cc = 2.7v 2.0 v clear input current i clear -1 +1 ? clear high to out low propagation delay t co r l = 10k , c l = 100pf 200 ns esd characteristics iec 61000-4-2 air discharge ?5 iec 61000-4-2 contact discharge ? esd protection in human body model ?5 kv
MAX16054 on/off controller with debounce and 15kv esd protection _______________________________________________________________________________________ 3 supply current vs. temperature MAX16054 toc01 temperature ( c) supply current ( a) 110 95 65 80 -10 5 20 35 50 -25 1 2 3 4 5 6 7 8 9 10 0 -40 125 v cc = 5v v cc = 3v debounce of closing switch MAX16054 toc02 10ms/div 10v in 10v/div -10v out 5v/div 0v out 5v/div 0v v cc = 5v output logic level vs. supply voltage MAX16054 toc03 supply voltage (v) output logic level (v) 5.0 4.5 4.0 3.5 3.0 2.5 1 2 3 4 5 6 0 2.0 5.5 v oh , i source = 0.4ma v ol , i sink = 1.6ma typical operating characteristics (t a = +25?, unless otherwise noted.) debounce delay period vs. temperature MAX16054 toc04 temperature ( c) debounce delay period (ms) 110 95 65 80 -10 5 20 35 50 -25 42 44 46 48 50 52 54 56 58 60 40 -40 125 v cc = 5v v cc = 3v v cc undervoltage lockout vs. temperature MAX16054 toc05 temperature ( c) v cc undervoltage lockout (v) 110 95 80 65 50 35 20 5 -10 -25 0.5 1.0 1.5 2.0 2.5 3.0 3.5 0 -40 125 v cc rising pin description pin name function 1in switch toggle input. in features a -25v to +25v maximum input range and includes an internal 63k pullup resistor to v cc . connect a pushbutton from in to gnd. 2 gnd ground 3 clear clear input. pull clear high to force out low. connect clear to gnd if unused. 4 out active-low cmos output 5 out active-high cmos output 6 v cc +2.7v to +5.5v supply input. in noisy environments, bypass v cc to gnd with a 0.1? or greater ceramic capacitor.
detailed description theory of operation the MAX16054 creates a push-on, push-off function using a momentary-contact normally open spst switch. the high-to-low transition that occurs when closing the switch causes out to go high and out to go low. the output state remains latched after the switch is released/opened. closing the switch again causes out to go low and out to go high. debounce circuitry eliminates the extraneous level changes that result from interfacing with mechanical switches (switch bounce). virtually all mechanical switches bounce upon opening and closing. the bounce when a switch opens or closes is eliminated by requiring that the sequentially clocked input remains in the same state for a number of sampling periods. the output does not change state from high-to-low or low- to-high until the input is stable for at least 50ms (typ). the functional diagram shows the functional blocks consisting of an on-chip oscillator, counter, exclusive- nor gate, a d flip-flop, and a t (toggle) flip-flop. when the pushbutton input does not equal the internal debounced button state (the q output of the d flip- flop), the xnor gate issues a counter reset. when the switch input state is stable for the full qualification peri- od, the counter clocks the d flip-flop, changing the internal pushbutton state. the q output of the d flip-flop is connected to a toggle flip-flop that toggles when the internal pushbutton state goes through a high-to-low transition. figure 1 shows the typical opening and clos- ing switch debounce operation. a rising pulse at clear resets the t flip-flop and pulls out low and out high. MAX16054 on/off controller with debounce and 15kv esd protection 4 _______________________________________________________________________________________ functional diagram xnor undervoltage lockout t q clr counter d q r d q clr osc v cc r pu r in out out clear esd protection v cc MAX16054
undervoltage lockout the undervoltage-lockout circuitry ensures that the out- puts are at the correct state on power-up. while v cc is less than the 2.1v (typ) undervoltage threshold and greater than 1.0v, out remains low and transitions at in are ignored. robust switch input the switch input (in) has overvoltage clamping diodes to protect against damaging fault conditions. switch input voltages can safely swing ?5v to ground. proprietary esd-protection structures protect against high esd encountered in harsh industrial environments, membrane keypads, and portable applications. they are designed to withstand ?5kv per the iec 61000-4-2 air-gap discharge test and ?kv per the iec 61000-4-2 contact- discharge test. since there is a 63k (typ) pullup resistor connected to in, driving the input to -25v draws approximately 0.5ma from the v cc supply. driving the input to +25v causes approximately 0.32ma of current to flow back into the v cc supply. if the total system v cc supply current is less than the current flowing back into the v cc supply, v cc rises above normal levels. in some low-current sys- tems, a zener diode on v cc may be required. 15kv esd protection esd-protection structures are incorporated on all pins to protect against electrostatic discharges encountered during handling and assembly. the MAX16054 has extra protection against static electricity to protect against esd of ?5kv at the switch input without dam- age. the esd structures withstand high esd in all states: normal operation, shutdown, and powered down. a design advantage of the MAX16054 is that it continues working without latchup after an esd event, which eliminates the need to power-cycle the device. esd protection can be tested in various ways; this product is characterized for protection to the following limits: 1) ?5kv using the human body model. 2) ?kv using the contact-discharge method specified in iec 61000-4-2. 3) ?5kv using the iec 61000-4-2 air-gap method. MAX16054 on/off controller with debounce and 15kv esd protection _______________________________________________________________________________________ 5 v cc t dp t dp t dp t dp t dp t co uvlo in output of d flip-flop (inverted in after debounce) out clear figure 1. MAX16054 timing diagram
MAX16054 human body model figure 2a shows the human body model, and figure 2b shows the current waveform it generates when dis- charged into a low impedance. this model consists of a 100pf capacitor charged to the esd voltage of interest, which is then discharged into the test device through a 1.5k resistor. iec 61000-4-2 the iec 61000-4-2 standard covers esd testing and performance of finished equipment; it does not specifi- cally refer to integrated circuits. the MAX16054 helps in the design of equipment that meets iec 61000-4-2, with- out the need for additional esd-protection components. the major difference between tests done using the human body model and iec 61000-4-2 is higher peak current in iec 61000-4-2, because series resistance is lower in the iec 61000-4-2 model. hence, the esd with- stand voltage measured to iec 61000-4-2 is generally lower than that measured using the human body model. figure 3a shows the iec 61000-4-2 model, and figure 3b shows the current waveform for the iec 61000-4-2 esd contact-discharge test. the air-gap test involves approaching the device with a charged probe. the contact-discharge method connects the probe to the device before the probe is energized. machine model the machine model for esd tests all pins using a 200pf storage capacitor and zero discharge resis- tance. its objective is to emulate the stress caused by contact that occurs with handling and assembly during manufacturing. on/off controller with debounce and 15kv esd protection 6 _______________________________________________________________________________________ charge-current limit resistor discharge resistance storage capacitor c s 100pf r c 1m r d 1500 high- voltage dc source device under test figure 2a. human body esd test model charge-current limit resistor discharge resistance storage capacitor c s 150pf r c 50m to 100m r d 330 high- voltage dc source device under test figure 2b. human body current waveform i p 100% 90% 36.8% t rl time t dl current waveform peak-to-peak ringing (not drawn to scale) i r 10% 0 0 amperes figure 3a. iec 61000-4-2 esd test model t r = 0.7ns to 1ns 30ns 60ns t 100% 90% 10% i peak i figure 3b. iec 61000-4-2 esd generator current waveform
MAX16054 on/off controller with debounce and 15kv esd protection _______________________________________________________________________________________ 7 typical operating circuits (continued) MAX16054 out 3v p out in clear gnd on/off with p-channel mosfet v cc MAX16054 out out in clear gnd push either button v cc 3.3v MAX16054 out out in clear gnd digital pushbutton with led (default = off) v cc 3.3v MAX16054 out out in clear gnd push both buttons v cc 3.3v
MAX16054 on/off controller with debounce and 15kv esd protection 8 _______________________________________________________________________________________ typical operating circuits (continued) MAX16054 out out in clear gnd digital pushbutton with led (default = on) v cc 3.3v MAX16054 out r r, c sets pulse width c out in clear gnd pushbutton one-shot v cc 3.3v MAX16054 out out in a b state 0 clear gnd v cc 3.3v MAX16054 out a b out in clear gnd 4-position pushbutton selector switch led state v cc 3.3v state 1 state 2 state 3
MAX16054 on/off controller with debounce and 15kv esd protection 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 2008 maxim integrated products is a registered trademark of maxim integrated products, inc. package information for the latest package outline information, go to www.maxim-ic.com/packages . package type package code document no. 6 thin sot23 z6-1 21-0114 chip information process: bicmos


▲Up To Search▲   

 
Price & Availability of MAX16054

All Rights Reserved © IC-ON-LINE 2003 - 2022  

[Add Bookmark] [Contact Us] [Link exchange] [Privacy policy]
Mirror Sites :  [www.datasheet.hk]   [www.maxim4u.com]  [www.ic-on-line.cn] [www.ic-on-line.com] [www.ic-on-line.net] [www.alldatasheet.com.cn] [www.gdcy.com]  [www.gdcy.net]


 . . . . .
  We use cookies to deliver the best possible web experience and assist with our advertising efforts. By continuing to use this site, you consent to the use of cookies. For more information on cookies, please take a look at our Privacy Policy. X