features z precision supply-voltage monitor - 4.63v (AMS803/09/10l) - 4.26v (AMS803/09/10m) - 3.08v (AMS803/09/1 0t) - 2.93v (AMS803/09/1 0s) - 2.63v (AMS803/09/10r) - 2.32v (AMS803/09/10z) z 140ms(min) reset pulse width z push-pull /reset output configurations for ams809 z push-pull reset output configurations for ams810 z open-drain /reset output configuration for AMS803 z 12a supply current z guaranteed reset(/reset) valid to v cc = +1.0v z power supply transient immunity z no external components ordering information part number package AMS803xte lead free and green sot23-3 ams809xte lead free and green sot23-3 ams810xte lead free and green sot23-3 note: ?x? refers to voltage range, see below table. description the AMS803/09/10 ar e microprocessor (p) supervisory circuits used to monitor the power supplies in p and digital systems. they provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with +3.3v, +3.0v, or 2.5v powered circuits. these circuits perform a single function: they assert a reset signal whenever the vcc supply voltage declines below a preset threshold, keeping it asserted for at least 140ms after vcc has risen above the reset threshold. reset thresholds suitable for operation with a variety of supply voltages are available. the AMS803 has an open-drain output stage, while the ams809/10 have push-pull o utputs. the AMS803?s open-drain /reset output requires a pull-up resistor that can be connected to a voltage higher than v cc . the AMS803/09 have an active-low /reset output while the ams810 has an active-high reset output. the reset comparator is designed to ignore fast transients on v cc , and the outputs are guaranteed to be in the correct logic state for v cc down to 1v. low supply current makes the AMS803/09/10 ideal for use in portable equipment. the ics are available in 3 pin sot23 packages. suffix: x?monitored voltage x l m t s r z reset threshold (v) 4.63 4.26 3.08 2.93 2.63 2.32 block diagram reset reset logic and timer v cc + - v rst
pin configuration pin description pin type description vcc - supply voltage. reset is asserted when v cc drops below the reset threshold voltage (v rst ). reset remains asserted until v cc rises above v rst and keep asserted for the duration of the reset timeout period (t rs ) once v cc rises above v rst . gnd - ground reset o active-low reset output (push-pull). it goes low when vcc is below the reset threshold. it remains low for about 200ms after vcc rises above the reset threshold (v rst ). functional description reset output a microprocessor ( p) reset input starts the p in a known state. whenever the p is in an unknown state, it should be held in reset. the supervisory circuits assert reset during power-up and prevent code execution errors during power-down or brownout conditions. on power-up, once vcc reaches about 1.0v, /reset is a guaranteed logic low of 0.4v or less. as vcc rises, /reset stays low. when vcc rises above the reset threshold, an internal timer releases /reset after about 200ms. /reset pulses low whenever vcc drops below the reset threshold, i.e. brownout condition. if brownout occurs in the middle of a previously initiated reset pulse, guaranteed to be 0.4v or less until vcc drops below 1.0v. r eset timing diagram shows the timing relationship. 1 2 vcc gnd reset 3 sot23-3 AMS803/09/10xt
typical application circuit
maximum ratings storage temperature ............................................................-65 o c to +150 o c ambient temperature with power applied.......................... -40 o c to +85 o c supply voltage to ground potential (vcc to gnd) ............ ..-0.3v to +6.0v dc input voltage (all inputs exce pt vcc and gnd)......-0.3v to v cc +0.3v dc output current (all outputs) ..........................................................20ma power dissipation .... ............ ........... ............ ........... ............ .......... ...... 320mw recommended operation conditions sym description test conditions min typ max unit supply voltage for 803/09/10(l/m) - 4.5 5.0 5.5 v supply voltage for 803/09/10(t/s) - 3.0 3.3 5.5 v v cc supply voltage for 803/09/10(r/z) - 2.7 3.0 5.5 v t a ope rating tem perature - -4 0 - 85 note: stresses greater than those listed under maximum ratings may cause permanent damage to the device. this is a stress rating only and functional operation of the device at these or any other condi- tions above those indicated in the operational sec- tions of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect reliability.
dc electrical characteristics (v cc = v rn + 5% to 5.5v, t a = -40~85oc, unless otherwise noted.)(note 1) symbol description test conditions min typ max unit v cc operating voltage range - 1.0 - 5.5 v i cc supply cu rrent vcc < 5.5v , ams8x xl/m - 10 30 i cc supply cu rrent vcc < 3.6v, ams8xxr/s /t/z - 10 30 a ams80 9m v rn -1.1% v rn v rn +1.1% t a = 25oc all except 809m v rn - 1.5% v rn v rn + 1.5% t a = -40 ~ 85 oc ams80 9m v rn - 1.8% v rn v rn + 2% v rst
v rth ) threshold voltage(falling- edge)( note 2 ) t a = -40 ~ 85oc all except 809m v rn - 2.5% v rn v rn + 2.5% v v rth threshold voltage(rising- edge) (note 2) t a = -40 ~ 85oc ams809m 4.232 4.31 4.396 v rth reset threshold hysteresis ( note 2 ) vcc varies between v rn 5% (o nly for 8xxl/m) - 50 - mv vcc t 4.5v isource=800 a vcc-1.5 - - vcc t 2.7v isource=500 a 0.8vcc - - vcc t 1.8v isource=150 a 0.8vcc - - v oh output high voltage vcc t 1.0v isource=4 a 0.8vcc - - v vcc t 4.5v isink=3.2ma - - 0.4 vcc t 2.7v isink=1.2ma - - 0.3 v ol output low voltage vcc t 1.0v isink=100 a - - 0.3 v note: 1. parameters of room temperature guaranteed by production test and parameters of full-temperature guaranteed by design. 2 . v rst is reset threshold voltage when v cc falls from high to low level. v rn is nominal reset threshold voltage. ac electrical characteristics symbol description test co nditions min typ max unit - 8x xt/s/r/ z 140 240 560 t rs reset pulse width t a = 2 5oc 8x xl/m 140 200 280 ms reset timing diagram vcc t rs reset v rst v rst + v rth
mechanical information te (lead free and green sot23-3) x. xx x. xx denotes dimensions in millimeters note: 1) controlling dimensions in millimeters. 2) ref: jedec to-236h
marking information example: aapj part no.: ams809lt aapj part no.: ams809lte date code: year 2005 ww10 date code: year 2005 ww10 lead ?free package no. part no. code no. part no. code no. part no. code 1 ams809l aa 7 AMS803l bc 13 ams810l ah 2 ams80 9m ab 8 ams80 3m bd 14 ams81 0m ai 3 ams809t ac 9 AMS803t be 15 ams810t aj 4 ams809s ad 10 AMS803s bf 16 ams810s ak 5 ams80 9r ae 11 ams80 3r bg 17 ams81 0r al 6 ams809z af 12 AMS803z bh 18 ams810z am aa lj part no. 2 bit code (see below table) date code year & work week lead-free sign -: lead-free
notes disclaimer: ? ams reserves the rig ht t o make ch an g es t o the inf ormation herei n f or the improvement of the design and performance without further notice! customers should obtain the latest relevant information before placing orders and should verify that such information is complete and current. ? all semiconductor prod uc t s malf u nction or f ail wi th som e probability under special conditio ns . when using ams prod uc t s in system design or complete machine manufacturing, it is the responsibility of the buyer to comply with the safety standards strictly and take essenti al measures to avoid situation s in which a malf unction or failure of such ams products could cause loss of body injury or damage to property. ? ams will supply the be s t po ss i ble product for cu s tomers!
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