technical data 2011, february, re v. 0 1 micro monitor supply control the IN1705 is designed to control power supply and to start m i- crocontroller and microproce s sor systems. it is used for securing st a- ble functioning of the system when starting and halting the device as well as in the case of the supply vol t age drops. manufactured in 8 - pin soic/dip package ms - 012aa . lsi features: ? rated supply voltage 5.0 v; ? generat ion of reset signal when power supply is on for correct start of microprocessor; ? generation of reset signal when power supply drops below the operating one to avoid incorrect functioning of microprocessor; ? generation of reset signal when pushing reset but ton; ? possibility to program threashold voltage at which reset signal is generated. the IN1705 contains a source of reference voltage, two analog comparators, watchdog timer, digital sampler, digital delay. functions: ? generation of reset signal per fixed level of supply voltage; ? generation of reset signal from external ?reset? button; ? generation of signal of watchdog timer status; ? emergency interruption of primary power source. ordering inform a tion il1705n plastic il1705d soic t a = - 40 to 85 c for all packages . IN1705 fig. 2 ? pin assignment pbrst 1 vcc 2 gnd 3 in 4 5 nmi 6 st 7 rst 8 wds
in 1705 2011, february, rev. 0 1 industrial temperature range industrial temperature range - 40 to + 85. table 1 ? recommended operating conditions symbol parameter typical units min max v supply voltage 1.2 5 . 5 v v ih input voltage, high level 2.0 v +0.3 v v il input voltage, low level - 0.03 0.5 v a operating temperature range - 40 85 table 2 ? absolute maximum ratings symbol parameter typical units min max v supply voltage - 0.5 7.0 v v ih input voltage, high level - v +0.5 v v il input voltage, low level - 0.5 - v t stg storage temperature - 60 125 exposure to abs olute maximum rating conditions may affect reliability of ic and its functional operation. upon removing the absolute maximum ratings conditions, functional operation is guaranteed in recommended opera t ing conditions. * stresses beyond those listed under ?absolute maximum ratings? may cause permanent damage to the device. these are stress ratings only and functional operation of the device at these or any other conditions beyond those ind i- cated under ?recommended operating conditions? is not implied. exp osure to absolute - maximum - rated conditions for extended periods may affect device reliability.
in 1705 2011, february, rev. 0 1 table 3 ? dc electrical characteristics ( t a = - 40 to + 85 ) symbol parameter test conditions typical units min max v il input voltage, low level v kk = from 2 . 4 to 5.5v - 0.5 v v ih input voltage, high level v kk =from 2 . 4 to 5 .5 v 2 . 0 v i ol output current, low level ( nmi, rst ) v kk =from 2 . 4 to 5.5v v ol = 0.4v 10.0 - ma i o h output current, high level ( wds, nmi) v kk =from 4.5 to 5 .5v v oh = 2.4v - 100 - 1000 a i oh 1 output current, high level, ( rst ) v cc = from 5 .0 to 5.5v v oh =2.4v - 10 - ma v oh output voltage, high level (rst) v kk =from 5.0 to 5.5v i oh = - fd: v kk - 0.3 - v i lil 1 input leakage current, low level ( in) v kk =from 1.2 to 5.5v v il = 0 v - - 1.0 a i lil 2 input leakage current, low level ( st) v kk = 5.5v v il = 0 v - 10 - 100 a i lil 3 input leakage current, low level ( pbrst) v kk = 5.5v v il = 0 v - 50 - 450 a i lih input leakage current, high level v kk =from 1.2 to 5.5v v ih = v kk - 1.0 a i kk operating current v kk = from 1.2 to 5.5v v il = 0 v , v ih =v cc - 60 a v cctp v cc trip point v il = 0 v , v ih =v cc 4.5 4.75 v v tp in input trip point v kk =5 .0 v v il = 0 v , v ih =v cc 1.2 1.3 v
in 1705 2011, february, rev. 0 1 table 4 ? ac electrical characteristics (v = 5.0 v , a = - 40 to + 85 ) symbol paramete r typical units min max t td watchdog timeout 1.0 2 . 2 s t pdly pbrst stable low to rst and rst - 250 ns t rst reset active time 130 285 ms t rpd v kk detect to rst and rst - 8.0 s t rpu v kk detect to rst and rst 130 285 ms t ipd vin detect to nmi - 8.0 s t pb ( pbrst= v il ) 150 - ns t st st pulse width 10 - ns
in 1705 2011, february, rev. 0 1 timing diagrams fig. 3 ? timing diagram of forming reset signal from external pbrst control button fig. 4 ? timing diagram: strobe input ______ pbrst v il v ih ____ rst t rst t pb t pdly v o h ___ st ____ wds t td min max invalid strobe valid strobe indeterminate strobe t st ___ rst reset initiated by pushbutton
in 1705 2011, february, rev. 0 1 fig. 5 ? timing diagram: power down to v cctp t f t rpd v ol v cctp ( max) v cctp v cct p ( min) v cc ____ rst ____ wds ____ wds slews with v cc
in 1705 2011, february, rev. 0 1 fig. 6 ? timing diagram: power - up t r t rpu ____ rst v cc v cctp ( min) v cctp v cctp ( max) v oh ____ wds
in 1705 2011, february, rev. 0 1 fig. 7 ? timing diagram: non - maskable interrupt v i > 1, 25 b v tp ( max) v tp v tp ( min) v tp ( max) v tp v tp ( min) t i pd t i pd v ol v oh ____ nmi
in 1705 2011, february, rev. 0 1 fig. 8 ? block diagram table 5 ? pin description pin symbol description type 01 pbrst pushbutton reset input input 02 vcc power supply - 03 gnd ground - 04 in input input 05 nmi non - maskable interrupt output 06 s t watchdog timer strobe input 07 rst active low reset output 08 wds watchdog status output ____ rst ____ nmi reference voltage source in v cc ______ pbrst + - - + digital sampler digital sampler digital delay wat chdog timer ____ wds schmitt trigger __ st gnd
in 1705 2011, february, rev. 0 1 n suffix plastic dip (ms ? 001ba) symbol min max a 8.51 10.16 b 6.1 7.11 c 5.33 d 0.36 0.56 f 1.14 1.78 g h j 0 10 k 2.92 3.81 no tes : l 7.62 8.26 1. dimensions ?a?, ?b? do not include mold flash or protrusions. m 0.2 0.36 maximum mold flash or protrusions 0.25 mm (0.010) per side. n 0.38 d s uffix s oic (ms - 012aa) symbol min max a 4.8 5 b 3.8 4 c 1.35 1.75 d 0.33 0.51 f 0.4 1.27 g h j 0 8 no tes : k 0.1 0.25 1. dimensions a and b do not include mold flash or protrusion. m 0.19 0.25 2. maximum mold flash or protrusion 0.15 mm (0.006) per side p 5.8 6.2 for a; for b ? 0.25 mm (0.010) per s ide. r 0.25 0.5 1.27 5.72 dimens ion, mm dimens ion, mm 2.54 7.62 a b h c k c m j f m p g d r x 45 seating plane 0.25 (0.010) m t -t- 1 8 4 5 l h m j a b f g d se ati ng plane n k 0.25 (0.010) m t -t- c 1 8 4 5
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