2000 ?imp, inc. 408-432-9100/www.impweb.com 1 imp1 imp1 233m 233m p ower m anagement key features applications set-top boxes cellular phones pdas energy management systems embedded control systems printers single board computers improved dallas ds1233m replacement ?60% lower maximum supply current low supply current ?20? maximum (5.5v) ?15? maximum (3.6v) automatically restarts a microprocessor after power failure 350ms reset delay after v cc returns to an in-tolerance condition active low power-up reset, 5k ? internal pull-up precision temperature-compensated voltage reference and comparator eliminates external components pin function compatible with the motorola mc33064, mc34064, mc33164 and mc34164 motorola 68xxx and hc16 compatible compact surface mount so-8 package operating temperature 40 c to +85 c block diagram + 1233m_01.eps v cc reset gnd 5.0k w supply tolerance bias imp1233m delay 350ms typical reference lo lo w p w p o o w w er er , 5v/3.0v , 5v/3.0v p r p r eset eset C a C a ctiv ctiv e l e l o o w w , open-dr , open-dr ain output ain output C 350ms r C 350ms r eset p eset p er er iod iod the imp1233m supply voltage monitor is an improved, low-power replacement for the dallas semiconductor ds1233m. maximum supply current over temperature is a low 20 a, representing 60 percent lower power as compared to the ds1233m. the imp1233m issues an active low reset signal whenever the moni- tored supply is out-of-tolerance. a precision reference and comparator circuit monitor power supply (v cc ) level. tolerance level options are 5- and 10-percent for a 5v power supply. the tolerance is 15-percent for the 3.3v, imp1233m. when an out-of-tolerance condition is detected, an internal power-fail signal is generated which forces an active low reset signal. after v cc returns to an in-tolerance condition, the reset signal remains active for 350ms to allow the power supply and system micro- processor to stabilize. the imp1233m is designed with a open-drain output stage and operates over the extended industrial temperature range. devices are available in the compact surface mount so-8 package. other low power products in this family include the imp1810/11/12/15/ 16/17 and imp1233d. typical application imp1233m microprocessor reset reset 1233m_02.eps v cc gnd t r a p e g a t l o v t e s e r ) v ( e m i t t e s e r ) s m ( t u p t u o e g a t s t e s e r y t i r a l o p 0 1 8 1 p m i0 2 1 . 4 , 0 7 3 . 4 , 0 2 6 . 40 5 1l l u p - h s u pw o l 1 1 8 1 p m i0 3 1 . 4 , 0 5 3 . 4 , 0 2 6 . 40 5 1n i a r d - n e p ow o l 2 1 8 1 p m i0 3 1 . 4 , 0 5 3 . 4 , 0 2 6 . 40 5 1l l u p - h s u ph g i h 5 1 8 1 p m i0 5 5 . 2 , 0 8 8 . 2 , 0 6 0 . 30 5 1l l u p - h s u pw o l 6 1 8 1 p m i0 5 5 . 2 , 0 8 8 . 2 , 0 6 0 . 30 5 1n i a r d - n e p ow o l 7 1 8 1 p m i0 5 5 . 2 , 0 8 8 . 2 , 0 6 0 . 30 5 1l l u p - h s u ph g i h d 3 3 2 1 p m i5 2 1 . 4 , 5 7 3 . 4 , 5 2 6 . 40 5 3n i a r d - n e p ow o l m 3 3 2 1 p m i0 2 7 . 2 , 5 7 3 . 4 , 5 2 6 . 40 5 3n i a r d - n e p ow o l family selection guide
imp1 imp1 233m 233m 2 408-432-9100/www.impweb.com 2000 ?imp, inc. ! pin configuration pin descriptions 1233m_03.eps 4 gnd 3 nc 2 v cc 1 reset 5nc 6nc 7nc 8nc imp1233m ordering information so-8 y r a m m u s e c i v e d * * t r a p r e b m u n t e s e r t u p t u o e g a t l o v ) v ( t e s e r e c n a r e l o t ) % ( t e s e r e m i t ) s m ( e g a t s t u p t u o 8 - o s e g a k c a p t e s e r y t i r a l o p * n i a r d - n e p ol l u p - h s u p t / 5 5 - s m 3 3 2 1 p m i5 2 6 . 450 5 3 "" w o l t / 5 - s m 3 3 2 1 p m i5 7 3 . 40 10 5 3 "" w o l t / 3 - s m 3 3 2 1 p m i0 2 7 . 25 10 5 3 "" w o l k 5 l a n r e t n i * ? . p u l l u p r o t s i s e r . l e e r d n a e p a t s e t a c i d n i t / * * s p e . 3 0 t _ m 3 3 2 1 s r e b m u n n i p e m a nn o i t c n u f 8 - o s2 9 - o t 11t e s e rt u p t u o t e s e r w o l e v i t c a 22v c c t u p n i y l p p u s r e w o p 8 d n a 7 , 6 , 5 , 3 c nn o i t c e n n o c o n 43d n gd n u o r g
imp1 imp1 233m 233m 2000 ?imp, inc. microprocessor supervisor 3 notes: 1. a 1k ? external resistor maybe required in some applications for proper operation of the microprocessor reset control circuit. absolute maximum ratings electrical characteristics voltage on v cc . . . . . . . . . . . . . . . . . . . . . . . . 0.5v to 6.5v voltage on reset . . . . . . . . . . . . . . . . . . . . . 0.5v to v cc + 0.5v operating temperature range . . . . . . . . . . . 40 c to 85 c soldering temperature . . . . . . . . . . . . . . . . . . 260 c for 10 seconds storage temperature . . . . . . . . . . . . . . . . . . . 55 c to 125 c voltages measured with respect to ground. these are stress ratings only and functional operation is not implied. parameter symbol conditions min typ max units supply voltage v cc 1.2 5.5 v output voltage v oh i out < 500 av cc 0.5v v cc 0.1v v output current i ol output = 0.4v, v cc 2.7v +8 ma operating current i cc v cc < 5.5v, reset output open 8 20 a operating current i cc v cc 3.6v, reset output open 6 15 a v cc trip point (imp1233m-5) v cctp 4.25 4.375 4.49 v v cc trip point (imp1233m-55) v cctp 4.5 4.625 4.75 v v cc trip point (imp1233m-3) v cctp 2.64 2.72 2.8 v voltage high trip level v htl 4.75 v imp1233m-5 imp1233m-55 voltage low trip level v lt l 4.00 v imp1233m-5 imp1233m-55 voltage high trip level v htl 3.14 v imp1233m-3 voltage low trip level v lt l 2.48 v imp1233m-3 internal pull-up resistor r p 3.5 5.0 7.5 k ? output capacitance c out 10 pf v cc detect to reset low t rpd 210 s v cc slew rate t f 300 s (v htl - v lt l ) v cc slew rate t r 0ns (v lt l - v htl ) v cc detect to reset high t rpu t r = 5 s 200 350 500 ms unless otherwise noted, v cc = 1.2v to 5.5v and specifications are over the operating temperature range of 40 c to +85 c. all voltages are referenced to ground.
imp1 imp1 233m 233m 4 408-432-9100/www.impweb.com 2000 ?imp, inc. ! operation ?power monitor the imp1233m detects out-of-tolerance power supply conditions. it resets a processor during power-up and issues a reset to the system processor when the monitored power supply voltage is below the reset threshold (power-down). when an out-of- tolerance v cc voltage is detected, the reset signal is asserted. on power-up, reset is kept active (low) for approximately 350ms after the power supply voltage has reached the selected tolerance. this allows the power supply and microprocessor to stabilize before reset is released. figure 1. timing diagram: power-up figure 2. timing diagram: power-down v htl v cctp v ltl v cc reset t r t rpu v oh 1233m_05.eps v htl v cctp v ltl v cc reset t f v ol t rpd 1233m_06.eps application information
imp1 imp1 233m 233m 2000 ?imp, inc. microprocessor supervisor 5 absolute maximum ratings plastic so-8 (8-pin) l 0 8 c h e e d b a1 a so (8-pin).eps s e h c n is r e t e m i l l i m n i mx a mn i mx a m ) n i p - 8 ( 8 - o s c i t s a l p a3 5 0 . 09 6 0 . 05 3 . 15 7 . 1 1 a4 0 0 . 00 1 0 . 00 1 . 05 2 . 0 b3 1 0 . 00 2 0 . 03 3 . 01 5 . 0 c7 0 0 . 00 1 0 . 09 1 . 05 2 . 0 e0 5 0 . 07 2 . 1 e0 5 1 . 07 5 1 . 00 8 . 30 0 . 4 h8 2 2 . 04 4 2 . 00 8 . 50 2 . 6 l6 1 0 . 00 5 0 . 00 4 . 07 2 . 1 d9 8 1 . 07 9 1 . 00 8 . 40 0 . 2 s p e . 5 t _ m 3 3 2 1
imp, inc. corporate headquarters 2830 n. first street san jose, ca 95134-2071 tel: 408-432-9100 tel: 800-438-3722 fax: 408-434-0335 e-mail: info@impinc.com http://www.impweb.com the imp logo is a registered trademark of imp, inc. all other company and product names are trademarks of their respective owners. 2000 ? imp, inc. printed in usa publication #: 1013 revision: b issue date: 06/01/00 type: preliminary imp1 imp1 233m 233m
|
