1/9 n ultra low power consumption : 12 m a max. at v cc = 5v n precision reset threshold ( guaran- teed over temperature) n threshold voltage: 4.50v typ. for ts831-4 n guaranteed reset operation for v cc down to 1v n open drain output comparator with v ol = 450mv typ. @ i ol = 8ma & v cc = 4v n fast response time : 20 m s for a 10mv overdrive n 100mv internal hysteresis description the ts836 ultra low power integrated circuit incor- porates a high stability band-gap voltage refer- ence and a comparator with open drain output. the threshold voltage is set at 4.5v for ts836-4 by internal thermally matched resistances. the comparator exhibits a 20 m s response (with 10mv overdrive) and has an open drain output ac- tive when input voltage is lower than the threshold. an internal hysteresis of 100mv increases the comparators noise margin and prevents false re- set operation. application n power-on reset generator for microcontroller n power failure detector order code z = to92 plastic package d = small outline package (so) - also available in tape & reel (dt) p = thin shrink small outline package (tssop) - only available in tape & reel (pt) pin connections (top view) part number temperature range package dzp ts836-4i -40, +85c d so8 (plastic micropackage) p tssop8 (thin shrink small outline package) z to92 (plastic package) 1 2 3 out in gnd 8765 1234 nc nc nc out in nc gnd nc to92 so8-tssop8 ts836 micropower voltage supervisor reset active high september 2000
ts836 2/9 absolute maximum ratings operating conditions ts836-4 electrical characteristics tamb = 25c (unless otherwise specified) symbol parameter value unit v cc supply voltage 1) 7v v out output voltage -0.3 to v cc + 0.3 v i out output current 20 ma pd power dissipation 200 mw t oper operating free air temperature range -40 to +85 c t stg storage temperature -65 to +150 c 1. all voltages values, except differential voltage are with respect to network ground terminal. symbol parameter value unit v cc supply voltage 1 to 5.5 v symbol parameter min. typ. max. unit v thi threshold voltage - v cc increasing t min. t amb t max. 4.17 4.5 4.66 v v thd threshold voltage - v cc decreasing t min. t amb t max. 4.17 4.4 4.66 v v hys hysteresis voltage 50 100 200 mv i cc current consumption v cc = 5v 12 m a v ol low level output voltage v cc = 4v i ol = 8ma, t min. t amb t max. 450 800 1000 mv i oh output off-state leakage v cc = 5v t min. t amb t max. 2 100 1000 na tphl response time high to low r l = 10k w , c l = 15pf, v cc = v thd -10mv 20 m s
ts836 3/9 equivalent schematic diagram timing diagram
ts836 4/9 vth vs temperature while v cc increasing hysteresis vs temperature reset output voltage vs input voltage vth vs temperature while v cc decreasing i cc vs temperature voltage output low vs sink current -50-40-30-20-10 0 102030405060708090100110120 temperature (c) 4.4 4.44 4.48 4.52 4.56 vthi (volts) v t h i m a x v t h i m i n ts836-4 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 temperature (c) hysteresis (mv) ts836-4 160 140 120 100 80 60 4.3 4.4 4.5 4.6 input voltage (v) output voltage (v) ts836-4 rl=10kohms t=25c 5 4 3 2 1 0 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 temperature (c) vthd (volts) v t h d m a x v t h d m i n ts836-4 4.44 4.42 4.4 4.38 4.36 4.34 4.32 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 icc (a) i c c m i n i c c m a x ts836-4 0 2 4 6 8 10 12 14 16 18 20 isink (ma) vol (volts) ts836-4 t=25c 1 0.8 0.6 0.4 0.2 0
ts836 5/9 reset output voltage vs input voltage supply failing down : extended reset delaytime with an additional capacitor reset output voltage vs input voltage (example) supply failing down : reset delay time supply rising up : output delay time reset output voltage vs input voltage (example) ts836-4 rl=10kohms t=25c input signal 2v/div 0.5ms/div reset output 2v/div 0.5ms/div 5v 0v 5v 0v ts836-4 rl=10kohms t=25c input signal 2v/div 0.5ms/div reset output 2v/div 0.5ms/div 5v 0v 5v 0v ts836-4 rl=10 kohms cl=10 nf t=25c input signal 0.5v/div 0.1 ms/div reset output 2v/div 0.1 ms/div 5v 3.5v 3.5v 0v ts836-4 rl=10 kohms cl=10 nf t=25c input signal 0.5v/div 0.1 ms/div reset output 2v/div 0.1 ms/div 5v 3.5v 3.5v 0v ts836-4 rl=10 kohms t=25c input signal 2 v/div 0.5 ms/div reset output 2v/div 0.5 ms/div 6v 4v 6v 0v ts836-4 rl=10 kohms t=25c input signal 2 v/div 0.5 ms/div reset output 2v/div 0.5 ms/div 6v 4v 6v 0v input signal 0.5v/div 10 s/div reset output 2v/div 10 s/div ts836-4 rl=10kohms t=25c 5v 3.5v 3.5v 0v input signal 0.5v/div 10 s/div reset output 2v/div 10 s/div ts836-4 rl=10kohms t=25c 5v 3.5v 3.5v 0v input signal 0.5v/div 0.5 s/div reset output 2v/div 0.5 s/div 5v 3.5v 5v 0v ts836-4 rl=10 kohms t=25c input signal 0.5v/div 0.5 s/div reset output 2v/div 0.5 s/div 5v 3.5v 5v 0v ts836-4 rl=10 kohms t=25c ts836-4 rl=10 kohms t=25c input signal 2 v/div 0.5 ms/div reset output 2v/div 0.5 ms/div 5v 3v 5v 0v ts836-4 rl=10 kohms t=25c input signal 2 v/div 0.5 ms/div reset output 2v/div 0.5 ms/div 5v 3v 5v 0v
ts836 6/9 basic configuration configuration with an additional capacitive load ts836 load resistor input voltage output voltage vcc reset ts836 load resistor input voltage output voltage vcc reset capacitive load
ts836 7/9 package mechanical data 8 pins - plastic micropackage (so) dim. millimeters inches min. typ. max. min. typ. max. a 1.75 0.069 a1 0.1 0.25 0.004 0.010 a2 1.65 0.065 a3 0.65 0.85 0.026 0.033 b 0.35 0.48 0.014 0.019 b1 0.19 0.25 0.007 0.010 c 0.25 0.5 0.010 0.020 c1 45 (typ.) d 4.8 5.0 0.189 0.197 e 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 3.81 0.150 f 3.8 4.0 0.150 0.157 l 0.4 1.27 0.016 0.050 m 0.6 0.024 s 8 (max.)
ts836 8/9 package mechanical data 3 pins - plastic package to92 dim. millimeters inches min typ. max. min. typ. max. l 1.27 0.05 b 3.2 3.7 4.2 0.126 0.1457 0.1654 o1 4.45 5.00 5.2 0.1752 0.1969 0.2047 c 4.58 5.03 5.33 0.1803 0.198 0.2098 k 12.7 0.5 o2 0.407 0.5 0.508 0.016 0.0197 0.02 a 0.35 0.0138
ts836 9/9 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result f rom its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specificati ons mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectronics. ? the st logo is a registered trademark of stmicroelectronics ? 2000 stmicroelectronics - printed in italy - all rights reserved stmicroelectronics group of companies australia - brazil - china - finland - france - germany - hong kong - india - italy - japan - malaysia - malta - morocco singapore - spain - sweden - switzerland - united kingdom ? http://www.st.com package mechanical data 8 pins - thin shrink small outline package dim. millimeters inches min. typ. max. min. typ. max. a 1.20 0.05 a1 0.05 0.15 0.01 0.006 a2 0.80 1.00 1.05 0.031 0.039 0.041 b 0.19 0.30 0.007 0.15 c 0.09 0.20 0.003 0.012 d 2.90 3.00 3.10 0.114 0.118 0.122 e 6.40 0.252 e1 4.30 4.40 4.50 0.169 0.173 0.177 e 0.65 0.025 k 0 8 0 8 l 0.50 0.60 0.75 0.09 0.0236 0.030 0,25 mm .010 inch gage plane c aaa c plane seating e a a2 a1 d b e e1 l k c 14 8 5 pin 1 identification l1
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