TS834 MICROPOWER VOLTAGE SUPERVISOR RESET ACTIVE LOW OR HIGH WITH INTEGRATED TIMER . . .. . . . . ULTRA LOW POWER CONSUMPTION : 12µA 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 : 20µs 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 Temperature Range o TS834-5I -40, +85 C 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 20µs 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 November 1999 Package N D P • • • 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 1/8 TS834 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit V VCC Supply Voltage - note 1 7 Vout Output Voltage - note 1 -0.3 to VCC + 0.3 V Iout Output Current 20 mA Pd Power Dissipation - note 2 700 1200 625 mW Toper Operating Free Air Temperature Range Tstg Note: 1. 2. SO8 DIP8 TSSOP8 Storage Temperature -40 to +85 o C -65 to +150 o C 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 OPERATING CONDITIONS Symbol VCC Parameter Supply Voltage Value Unit 1.5 to 5.5 V TS834-5 o ELECTRICAL CHARACTERISTICS Tamb = 25 C (unless otherwise specified) Symbol 2/8 Parameter Test Condition Min. o Vthi Threshold Voltage VCC Increasing Tamb = 25 C o -40 ≤ Tamb ≤ +85 C Vthd Threshold Voltage VCC Decreasing Tamb = 25 C o -40 ≤ Tamb ≤ +85 C Typ. Max. 4.33 4.10 o V 4.46 4.23 4.10 50 Unit V 4.46 200 mV 12 µA 450 800 1000 mV 450 800 1000 mV VCC = 5V o -40 ≤ Tamb ≤ +85 C 2 40 1000 nA Output Off-state Leakage current (OUTPUT 2) VCC = 4V o -40 ≤ Tamb ≤ +85 C 2 40 1000 nA Response Time High to Low RL = 10kΩ, CL = 15pF VCC = Vthd -10mV 20 Vhys Hysteresis Voltage ICC Current Consumption VCC = 5V VOL1 Low Level Output Voltage (OUTPUT 1) VCC = 4V, IOL = 8mA, o -40 ≤ Tamb ≤ +85 C VOL2 Low Level Output Voltage (OUTPUT 2) VCC = 5V, IOL = 8mA, o -40 ≤ Tamb ≤ +85 C IOH1 Output Off-state Leakage current (OUTPUT 1) IOH2 tphl 100 µs 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 6/8 Min. Millimeters Typ. 3.32 0.51 1.15 0.356 0.204 Max. 1.65 0.55 0.304 10.92 9.75 7.95 Min. 0.020 0.045 0.014 0.008 Max. 0.065 0.022 0.012 0.430 0.384 0.313 2.54 7.62 7.62 3.18 Inches Typ. 0.131 0.100 0.300 0.300 6.6 5.08 3.81 1.52 0.125 0260 0.200 0.150 0.060 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. Millimeters Typ. 0.1 0.65 0.35 0.19 0.25 Max. 1.75 0.25 1.65 0.85 0.48 0.25 0.5 Min. Inches Typ. 0.026 0.014 0.007 0.010 Max. 0.069 0.010 0.065 0.033 0.019 0.010 0.020 0.189 0.228 0.197 0.244 0.004 o 45 (typ.) 4.8 5.8 5.0 6.2 1.27 3.81 3.8 0.4 0.050 0.150 4.0 1.27 0.6 0.150 0.016 0.157 0.050 0.024 8o (max.) 7/8 TS834 PACKAGE MECHANICAL DATA 8 PINS - THIN SHRINK SMALL OUTLINE PACKAGE k 0,25 mm .010 inch GAGE PLANE C SEATING PLANE E1 L1 L c A E A2 e aaa 1 8 C b D 5 4 A1 PIN 1 IDENTIFICATION 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. 1.00 3.00 6.40 4.40 0.65 0.60 Max. 1.20 0.15 1.05 0.30 0.20 3.10 Min. 0.01 0.031 0.007 0.003 0.114 4.50 0.169 8o 0.75 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. 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