ace 809 3 - pin microprocessor res et circuits ver 1. 3 1 d escription the ace 809 is a cost - effective system supervisor integrated circuit (ic) designed to monitor vcc in digital and mixed signal systems and provide a warning signal when the system power supply is out of working range, and a reset signal to the host processor when necessary. no external components are required. the reset output is driven active within 20sec of vcc falling through the reset voltage threshold. reset is maintained active after vcc rises above the reset threshold. the ace 809 has an active - low rese t output. the output of the ac e809 is guaranteed valid down to vcc=1v. the ac e809 is characterized for operation from - 40 to 85 , junction temperature. the ac e809 is optimized to reject fast transient glitches on the vcc line. low supply current of 7a (v cc=3.3v) makes these devices suitable for battery powered applications. the output voltages range from 1.7v to 4.5v in 100mv increments. standard voltage versions are 2.30, 2.63, 2.93, 3.08, 4.0, 4.38, and 4.63v. features ? precision vcc monitor for 2.8v, 3.0v,3.3v and 5.0v supplies ? 1 5 0ms guaranteed minimum reset output duration ? reset output g ua ranteed to vcc=1.0v ? lo w 7 a supply current. ? vcc transient immunity. ? no external components. ? esd rating is 7kv(hbm) ? wide operating temperat ure: - 40 to 85 application ? embedded systems ? computers ? critic al p p ower s upply m onitoring ? battery p owered equipment absolute maximum ratings (1) parameter symbol max unit supply voltage v cc 5.5 v outp ut voltage reset - 0.3 to (vcc+0.3) v input current 20 ma output current i out 20 ma power dissipation p d internally limited (3) output short circuit duration infinite thermal resistance junction to ambient ja 230 /w operating temperature range t a - 40~85 operating junction temperature range t j 0 to 125 storage temp erature range t s - 60 to 150
ace 809 3 - pin microprocessor res et circuits ver 1. 3 2 o p e r a t i n g r a t i n g ( 2 ) parameter symbol v a l u e unit supply i n p u t v o l t a g e v cc 2 . 0 t o 5 . 5 v j u n c t i o n t e m p e r a t u r e t j 0 t o 1 2 5 note: 1. exceeding the absolute maximum rati ng may damage the device. 2 . the device is not guaranteed to function outside its operating rating. 3. the maximum allowable power dissipation at any ta (ambient temperature) is calculated using: p d(max) = (t j(max) C t a )/ ja . exceeding the maxi mum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. see thermal consideration section for details 4 . reset threshold temperature coefficient is the worst case voltage change div ided by the total temperature range. packaging type sot - 23 - 3 3 1 2 ordering information ace 809 x xx + h s o t - 2 3 - 3 d e s c r i p t i o n f u n c t i o n 1 gnd ground 2 reset reset output remains low while vcc is below the reset voltage threshold and for 240msec(typ.) after vcc rises a bove reset threshold 3 vcc supply voltage (typ.) bm : sot - 23 - 3 v o l t a g e : l : 4.63v / m : 4.38v / j : 4.00v / t : 3.08v / s : 2.93v / r : 2.63v pb - free halogen - free
ace 809 3 - pin microprocessor res et circuits ver 1. 3 3 electrical characteristics vcc=5v for l/m/j ;3.3v for t/s ;3.0v for r ,ta = 25c, unless otherwise specified. parameter symbol conditions min. typ. max. unit input voltage vcc 2.0 5.5 v supply current icc 7 1 0 ua reset threshold v th ace809 - 4.63 ace809 - 4.38 ace809 - 4.00 ace809 - 3.08 ace809 - 2.93 ace809 - 2.63 a c e 8 0 9 - 2 . 3 v 4.5 1 4.2 7 3.9 0 3.0 0 2.8 5 2. 5 6 2.18 4.63 4.38 4.00 3.08 2.93 2.63 2.25 4.7 5 4.4 9 4. 1 0 3.1 6 3 . 0 0 2. 7 0 2.33 v reset threshold temper ature coefficient ( 4 ) 30 ppm/ vcc to reset delay vcc=v th to (v th - 100mv) 20 usec reset active timeout period 1 5 0 msec reset output voltage low v ol i sink =3ma 0.4 v reset output voltage high v oh i source =800ua 0.8vcc v typical performa nce characteristics v t h v s . t e m p e r a t u r e t - d e l a y v s . t e m p e r a t u r e temperature ( ) temperature ( )
ace 809 3 - pin microprocessor res et circuits ver 1. 3 4 packing information sot - 23 - 3
ace 809 3 - pin microprocessor res et circuits ver 1. 3 5 notes ace does not assume any responsibility for use as critical components in life support devices or systems without the express written ap proval of the president and general counsel of ace electronics co., ltd. as sued herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and shoes failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. a critical component is any component of a life support device or system whose failure t o perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. ace technology co., ltd. http://www.ace - ele.com/
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