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| (R) TS831 MICROPOWER VOLTAGE SUPERVISOR RESET ACTIVE LOW . . . . . . . . ULTRA LOW POWER CONSUMPTION : 12A max. @ VCC = 5V PRECISION RESET THRESHOLD (guaranteed over Temperature) 4.33Vtyp. THRESHOLD VOLTAGE (TS831-5) 4.50Vtyp. THRESHOLD VOLTAGE (TS831-4) GUARANTEED RESET OPERATION FOR VCC DOWN TO 1V OPEN DRAIN OUTPUT COMPARATOR WITH Vol = 450mVtyp. @ Iol = 8mA & VCC = 4V FAST RESPONSE TIME : 20s FOR A 10mV OVERDRIVE 100mV INTERNAL HYSTERESIS PIN TO PIN COMPATIBLE WITH MC33064 AND MC33164 D SO8 (Plastic Micropackage) Z TO92 (Plastic Package) ORDER CODES Part Number TS831-5I TS831-4I Temperature Range -40, +125oC -40, +125 C o Package D * * Z u u DESCRIPTION The TS831 ultra low power integrated circuit incorporates a high stability band gap voltage reference and a comparator with open drain output. The threshold voltage is set at 4.33V for TS831-5 and 4.5V for TS831-4 by internal thermally matched resistances. The comparator exhibits a 20s response (with 10mV overdrive) and has an open drain output active when input voltage is lower than the threshold. An internalhysteresis of 100mV increases the comparator's noise margin and prevents false reset operation. APPLICATIONS Power-on reset generator for microcontroler Power failure detector PIN CONNECTIONS TO92 (top view) NC 8 SO8 NC 7 NC 6 NC 5 1 OUT 2 IN 3 GND 1 OUT 2 IN 3 NC 4 GND . . August 1999 1/8 TS831 ABSOLUTE MAXIMUM RATINGS Symbol VCC Vout Iout Pd IF Toper Tstg Note: 1. 2. 3. Parameter Supply Voltage - note 1 Output Voltage Output Current Power Dissipation - note 2 Clamp Diode Forward Current, pin 1 to pin 2 - note 3 Operating Free Air Temperature Range Storage Temperature TO92 SO8 Value 7 + -0.3 to VCC 0.3 20 650 700 100 -40 to +125 -65 to +150 Unit V V mA mW mA o C o C All voltages values, except differential voltage are with respect to network ground terminal. Tj = 150oC, Tamb = 25oC with Rthja = 200oC/W for TO92 package Rthja = 175oC/W for SO8 package Maximum package power dissipation limits must be observed. OPERATING CONDITIONS Symbol VCC Parameter Supply Voltage Value 1 to 5.5 Unit V TS831-5 ELECTRICAL CHARACTERISTICS Tamb = 25oC (unless otherwise specified) Symbol Vthi Parameter Threshold Voltage - VCC Increasing o o -40 C Tamb +125 C o o -40 C Tamb +125 C Threshold Voltage - VCC Decreasing o o -40 C Tamb +125 C o o -40 C Tamb +125 C Hysteresis Voltage Current Consumption VCC = 5V Low Level Output Voltage VCC = 4V, IOL = 8mA -40oC Tamb +125oC o o -40 C Tamb +125 C Output Off-state Leakage VCC = 5V o o -40 C Tamb +125 C Response Time High to Low RL = 10k, CL = 15pF, VCC = Vthd -10mV Min. 4.10 4.10 4.21 4.10 4.06 50 4.46 4.46 200 12 800 1000 1300 100 1000 Typ. 4.33 Max. 4.46 4.50 V Unit V Vthd Vhys ICC VOL IOH tphl 100 450 mV A mV 2 20 nA s TS831-4 ELECTRICAL CHARACTERISTICS Tamb = 25oC (unless otherwise specified) Symbol Vthi Vthd Vhys ICC VOL Parameter Threshold Voltage - VCC Increasing -40oC Tamb +125oC -40oC Tamb +125oC Threshold Voltage - VCC Decreasing o o -40 C Tamb +125 C o o -40 C Tamb +125 C Hysteresis Voltage Current Consumption VCC = 5V Low Level Output Voltage VCC = 4V, IOL = 8mA o o -40 C Tamb +125 C o o -40 C Tamb +125 C Output Off-state Leakage VCC = 5V o o -40 C Tamb +125 C Response Time High to Low RL = 10k, CL = 15pF, VCC = Vthd -10mV Min. 4.17 4.17 4.4 4.17 4.13 50 4.66 4.66 200 12 800 1000 1300 100 1000 Typ. 4.5 Max. 4.66 4.70 V Unit V 100 450 mV A mV IOH tphl 2 20 nA s 2/8 TS831 EQUIVALENT SCHEMATIC DIAGRAM TIMING DIAGRAM 3/8 TS831 Vth vs Temperature while VCC increasing Vth vs Temperature while VCC decreasing Vthi (Volts) 4,56 Vthd ( Volts) 4,44 TS831-4 4,42 Vt h d max 4,52 V max t ih 4,4 4,48 in h im Vt 4,38 TS831-4 4,44 4,36 mn di Vt h 4,34 4,4 -50 -40 -30 -20 -10 0 10 20 30 40 50 Temperature (C) 60 70 80 90 100 110 120 4,32 -50 -40 -30 -20 -10 0 10 20 30 40 50 Temperature (C) 60 70 80 90 100 110 120 Hysteresis vs Temperature ICC vs Temperature Hyst eresis (mV) 160 Icc ( A) 9,6 TS831-4 140 9,4 x m ca Ic 9,2 120 Ic c 9 in m 100 8,8 8,6 80 TS831-4 8,4 60 -50 -40 -30 -20 -10 0 10 20 30 40 50 Temperature (C) 60 70 80 90 100 110 120 8,2 -50 -40 -30 -20 -10 0 10 20 30 40 50 Temperature( C) 60 70 80 90 100 110 120 Reset Output Voltage vs Input Voltage Voltage Output Low vs Sink Current Output voltage(V) Vol (Volts) 1,4 5 1,2 4 1 TS831 -4 T=25C 3 TS831-4 RL=10 Kohms T=25C 0,8 0,6 2 0,4 1 0,2 0 4,3 4,4 Input voltage (V) 4,5 4,6 0 0 2 4 6 8 10 12 14 16 18 20 Isi nk (mA) 4/8 TS831 Reset Output Voltage vs Input Voltage Supply Falling Down : Reset Delay Time 5V Input signal 2 V/div 0 .5ms/div 0V TS831-4 RL=10 K ohms T=25C 5V Input signal 0.5V/div 2 s/div 3 .5V 5V TS831-4 RL=1 0 Kohms T=25C 5V R eset output 2 V/div 0 .5ms/div 0V Reset output 2V/div 2 s/div 0V Extended Delay of Power-On-Reset with an External Capacitor Supply Rising up : Output Delay Time 5V Input signal 0.5V /div 0.5 s/div 3 .5V 5V Reset output 2V/div 0.5 s/div 0V TS831-4 RL=10 Kohms T=25 C Reset Output Voltage vs Input Voltage (example) Reset Output Voltage vs Input Voltage (example) Input signal 6 V 2 V/div 0.5 ms/div 4 V TS831-4 RL=1 0 Kohms T=25C 6V Input signal 5 V 2 V/div 0.5 ms/div 3V TS831 -4 RL=1 0 K ohms T=25C 5V R eset output 2 V/div 0.5 ms/div 0V Reset output 2V/div 0.5 ms/div 0V 5/8 TS831 Basic Configuration Clamp Diode Forward Current vs Voltage If Forward Current (mA) Load Resistor 50 40 30 Vcc Input Voltage TS831 Output Voltage Reset 20 10 0,7 0,8 0,9 1 1,1 1,2 Vf Forward voltage (V) Configuration with an Additional Capacitive Load Load Resistor Vcc Input Voltage TS831 C apacitive Load Reset Output Voltage 6/8 TS831 PACKAGE MECHANICAL DATA 8 PINS - PLASTIC MICROPACKAGE (SO) Dim. A a1 a2 a3 b b1 C c1 D E e e3 F L M S Min. 0.1 0.65 0.35 0.19 0.25 4.8 5.8 Millimeters Typ. Max. 1.75 0.25 1.65 0.85 0.48 0.25 0.5 45 (typ.) 5.0 6.2 o Min. 0.004 0.026 0.014 0.007 0.010 0.189 0.228 Inches Typ. Max. 0.069 0.010 0.065 0.033 0.019 0.010 0.020 0.197 0.244 1.27 3.81 3.8 0.4 4.0 1.27 0.6 8 (max.) o 0.050 0.150 0.150 0.016 0.157 0.050 0.024 7/8 TS831 PACKAGE MECHANICAL DATA 3 PINS - PLASTIC PACKAGE TO92 Dim. L B O1 C K O2 a Millimeters Min. 3.2 4.45 4.58 12.7 0.407 0.35 0.5 0.508 Typ. 1.27 3.7 5.00 5.03 4.2 5.2 5.33 0.126 0.1752 0.1803 0.5 0.016 0.0138 Max. Min. Inches Typ. 0.05 0.1457 0.1969 0.198 0.0197 0.1654 0.2047 0.2098 0.02 Max. 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 from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this pub lication 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. (c) The ST logo is a trademark of STMicroelectronics (c) 1999 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 - U.S.A. (c) http://www.st.com 8/8 |
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