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| (R) TS834 MICROPOWER VOLTAGE SUPERVISOR RESET ACTIVE LOW OR HIGH WITH INTEGRATED TIMER . . . . . . . . ULTRA LOW POWER CONSUMPTION : 12A max. @ VCC = 5V BOTH ACTIVE HIGH AND ACTIVE LOW OUTPUTS RESET TIMER WITH DISABLE FUNCTION PRECISION RESET THRESHOLD (guaranteed over Temperature) 4.33V typ. THRESHOLD VOLTAGE GUARANTEED RESET OPERATION DOWN TO 1.5V OPEN DRAIN OUTPUT WITH Vol = 450mVtyp. @ Iol = 8mA & VCC = 4V FAST RESPONSE TIME : 20s FOR A 10mV OVERDRIVE 100mV INTERNAL HYSTERESIS N DIP8 (Plastic Package) D SO8 (Plastic Micropackage) P TSSOP8 (Thin Shrink Small Outline Package) ORDER CODES Part Number TS834-5I Temperature Range -40, +85 C o Package N * D * P * DESCRIPTION The TS834 is a voltage supervisor providing two different outputs (one active low and one active high) with an integrated timer that can be disabled. It incorporates a high stability bandgap voltage reference and a comparator with open drain output. The threshold voltage is set at 4.33V by internal thermally matched resistors. The comparator exhibits a 20s response (with 10mV overdrive). An internal hysteresis of 100mV increases the comparator noise margin and prevents false reset operation. APPLICATIONS Computers Microcontrollers Microprocessor systems Intelligent instruments Power failure detection PIN CONNECTIONS Rese t Low 1 8 Rese t High Vcc 2 7 NC NC 3 6 NC . . . . . Gnd 4 5 Time r Control* * This pin must be connecte d to Vcc or Gnd November 1999 1/8 TS834 ABSOLUTE MAXIMUM RATINGS Symbol VCC Vout Iout Pd Supply Voltage - note 1 Output Voltage - note 1 Output Current Power Dissipation - note 2 SO8 DIP8 TSSOP8 Parameter Value 7 -0.3 to VCC + 0.3 20 700 1200 625 -40 to +85 -65 to +150 Unit V V mA mW Toper Tstg Note: 1. 2. Operating Free Air Temperature Range Storage Temperature All voltages values, except differential voltage are with respect to network ground terminal. o o o T j = 150 C, Tamb = 25 C with Rthja = 175 C/W for SO8 package o Rthja = 100 C/W for DIP8 package o Rthja = 200 C/W for TSSOP8 package o o C C OPERATING CONDITIONS Symbol VCC Supply Voltage Parameter Value 1.5 to 5.5 Unit V TS834-5 o ELECTRICAL CHARACTERISTICS Tamb = 25 C (unless otherwise specified) Symbol Vthi Vthd Vhys ICC VOL1 VOL2 IOH1 IOH2 tphl Parameter Threshold Voltage VCC Increasing Threshold Voltage VCC Decreasing Hysteresis Voltage Test Condition Min. 4.10 Typ. 4.33 Max. 4.46 Unit V V Tamb = 25 C o -40 Tamb +85 C Tamb = 25 C o -40 Tamb +85 C VCC = 5V VCC = 4V, IOL = 8mA, o -40 Tamb +85 C VCC = 5V, IOL = 8mA, o -40 Tamb +85 C VCC = 5V o -40 Tamb +85 C VCC = 4V o -40 Tamb +85 C RL = 10k, CL = 15pF VCC = Vthd -10mV o o 4.23 4.10 50 100 450 450 2 2 20 4.46 200 12 800 1000 800 1000 40 1000 40 1000 mV A mV mV nA nA s Current Consumption Low Level Output Voltage (OUTPUT 1) Low Level Output Voltage (OUTPUT 2) Output Off-state Leakage current (OUTPUT 1) Output Off-state Leakage current (OUTPUT 2) Response Time High to Low 2/8 TS834 TIMING DIAGRAMS All the timing diagrams are given with outputs loaded by 10kW resistors to VCC. Vcc+ Input Timer Control Vcc RESE T OUTPUT Timer Vcc RESE T OUTP UT Vref Time r e nable : timer control to Vcc Time r dis able : time r control to Gnd GND Active Low Reset, Timer Enabled Active Low Reset, Timer Disabled Active High Reset, Timer Enabled Active High Reset, Timer Disabled 3/8 TS834 Voltage Threshold (Vthi) vs Temperature Current Consumption vs Temperature Timer Period (trst) vs Temperature Vol vs Temperature Output Voltage vs Input Output Voltage vs Input 4/8 TS834 Vol vs Isink Schematic to Measure Vol vs Isink Vc c Vc c=4V TS834 Is ink Re s e t =low Vcc =5V Vc c TS834 Is ink Re s e t=low Reset High After Vcc Transition (timer disabled) Reset Low After Vcc Transition (timer disabled) 5/8 TS834 PACKAGE MECHANICAL DATA 8 PINS - PLASTIC PACKAGE Dimensions A a1 B b b1 D E e e3 e4 F i L Z Min. 0.51 1.15 0.356 0.204 7.95 Millimeters Typ. 3.32 Max. Min. 0.020 0.045 0.014 0.008 0.313 Inches Typ. 0.131 Max. 1.65 0.55 0.304 10.92 9.75 2.54 7.62 7.62 6.6 5.08 3.81 1.52 0.065 0.022 0.012 0.430 0.384 0.100 0.300 0.300 0260 0.200 0.150 0.060 3.18 0.125 6/8 TS834 PACKAGE MECHANICAL DATA 8 PINS - PLASTICMICROPACKAGE (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 8o (max.) 0.150 0.016 0.050 0.150 0.157 0.050 0.024 7/8 TS834 PACKAGE MECHANICAL DATA 8 PINS - THIN SHRINK SMALL OUTLINE PACKAGE k 0,25 mm .010 inch GAGE PLANE c L E1 SEATING PLANE A A2 A1 5 C E L1 D 4 b C 8 aaa PIN 1 IDENTIFICA TION Dim. A A1 A2 b c D E E1 e k l Min. 0.05 0.80 0.19 0.09 2.90 4.30 0o 0.50 Millimeters Typ. 1 e 1.00 3.00 6.40 4.40 0.65 0.60 Max. 1.20 0.15 1.05 0.30 0.20 3.10 4.50 8o 0.75 Min. 0.01 0.031 0.007 0.003 0.114 0.169 0o 0.09 Inches Typ. 0.039 0.118 0.252 0.173 0.025 0.0236 Max. 0.05 0.006 0.041 0.15 0.012 0.122 0.177 8o 0.030 Information furnished is believed to be accurateand reliable. However, STMicroelectronicsassumes 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 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. (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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