ver: 0.3 apr 10, 2012 tel: 886-3-5788833 http://www.gmt.com.tw 1 G663 global mixed-mode technology microprocessor reset ic features ? power-on reset generator with fixed delay time of 200ms ? manual reset input ? push-pull reset and reset output ? supply voltage supervision range 2.5v, 3v, 3.3v, 5v ? supply current of 10 a at v cc =3.3v ? sot-23-5 package applications ? critical p and c power monitoring ? industrial equipment ? programmable controls ? automotive systems ? portable/battery-powered equipment ? intelligent instruments ? wireless communications systems ? notebook/desktop computers general description the G663 provide circuits initialization and timing su- pervision, primarily for dsp and processor-based sys- tems. during power-on, reset (reset) is asserted when supply voltage vcc becomes higher than 1.1 v. thereafter, the supply voltage supervisor monitors vcc and keeps reset (reset) active as long as vcc remains below the threshold voltage v it+ (1) . an internal timer delays the return of the output to the inactive state to ensure proper system reset. the de- lay time, td, starts after vcc has risen above the threshold voltage v it+ . when the supply voltage drops below the threshold voltage v it- (2) , the outputs be- comes active again. no external components are re- quired. all the devices have a fixed-sense threshold voltage v it- set by an internal voltage divider. the G663 incorporate a manual reset input mr . a low level at mr causes reset (reset) to be- come active. the product spectrum is designed for supply voltages of 2.5v, 3v, 3.3v, and 5v. the circuits are available in a sot-23-5 package. note: (1) v it+ means the reset voltage of v cc from low to high (2) v it- means the reset voltage of v cc from high to low. ordering information order number reset threshold (v) marking output type temp. range package (green) G663-225t11u 2.25 663ax push-pull reset & reset -40 c ~ +85 c sot-23-5 G663-263t11u 2.63 663bx push-pull reset & reset -40 c ~ +85 c sot-23-5 G663-293t11u 2.93 663cx push-pull reset & reset -40 c ~ +85 c sot-23-5 G663-455t11u 4.55 663dx push-pull reset & reset -40 c ~ +85 c sot-23-5 note: t1: sot-23-5 1: bonding code u: tape & reel pin configuration typical application circuit p reset gnd vcc vcc reset gnd mr 3.3v 100nf * G663 reset gnd sot-23-5 5 1 2 mr 4 3 vcc reset G663 reset reset the bypass capacitor should be mounted as close as possible to v cc . icc may increased at high t a , therefore, can not connect resistors to vcc to prevent icc abnormal behavior at high t a . p reset gnd vcc vcc reset gnd mr 3.3v 100nf * G663 reset gnd sot-23-5 5 1 2 mr 4 3 vcc reset G663 reset reset the bypass capacitor should be mounted as close as possible to v cc . icc may increased at high t a , therefore, can not connect resistors to vcc to prevent icc abnormal behavior at high t a .
|
