TS834-5IDT STMicroelectronics

TS834 MICROPOWER VOLTAGE SUPERVISOR RESET ACTIVE LOW OR HIGH INTEGRATED TIMER ULTRA LOW POWER CONSUMPTION : 12A max. V = 5V CC BOTH ACTIVE HIGH AND ACTIVE LOW OUTPUTS RESET TIMER WITH DISABLE FUNCTION PRECISION RESET THRESHOLD (guaran- teed over Temperature) 4.33V typ. THRESHOLD VOLTAGE GUARANTEED RESET OPERATION DOWN D TO 1.5V SO8 (Plastic Micropackage) OPEN DRAIN OUTPUT WITH Vol = 450mV typ. Iol = 8mA & V = 4V CC FAST RESPONSE TIME : 20s FOR A 10mV OVERDRIVE 100mV INTERNAL HYSTERESIS P TSSOP8 (Thin Shrink Small Outline Package) DESCRIPTION The TS834 is a voltage supervisor providing two ORDER CODE different outputs (one active low and one active high) with an integrated timer that can be dis- Package abled. Part Number Temperature Range DP It incorporates a high stability bandgap voltage TS834-5I -40, +85C reference and a comparator with open drain out- put. D = Small Outline Package (SO) - also available in Tape & Reel (DT) P = Thin Shrink Small Outline Package (TSSOP) - only available The threshold voltage is set at 4.33V by internal in Tape & Reel (PT) thermally matched resistors. PIN CONNECTIONS (top view) The comparator exhibits a 20s response (with 10mV overdrive). An internal hysteresis of 100mV increases the Reset Low comparator noise margin and prevents false reset 1 8 Reset High operation. Vcc 2 7 NC APPLICATION 6 NC 3 NC Computers Microcontrollers Gnd Timer Control* 5 4 Microprocessor systems Intelligent instruments * This pin must be connected to Vcc or Gnd Power failure detection January 2001 1/7TS834 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit 1) V 7V CC Supply Voltage V Output Voltage - See note 1 -0.3 to V + 0.3 V out cc I Output Current 20 mA out 2) Pd 700 mW Power Dissipation SO8 625 TSSOP8 T Operating Free Air Temperature Range -40 to +85 C oper T Storage Temperature -65 to +150 C stg 1. All voltages values, except differential voltage are with respect to network ground terminal. o o 2. T = 150C, T = 25 C with Rthja = 175 C/W for SO8 package amb j o Rthja = 200 C/W for TSSOP8 package OPERATING CONDITIONS Symbol Parameter Value Unit V Supply Voltage 1.5 to 5.5 V CC T Operating Free Air Temperature Range -40 to +85 C oper TS834-5 ELECTRICAL CHARACTERISTICS T = 25C (unless otherwise specified) amb Symbol Parameter Min. Typ. Max. Unit Threshold Voltage - V Increasing CC V T = 25C 4.33 V thi amb -40C T +85C 4.10 4.46 amb Threshold Voltage - V Decreasing CC T = 25C V 4.23 V amb thd 4.10 4.46 -40C T +85C amb V Hysteresis Voltage 50 100 200 mV hys I Current Consumption V = 5V 12 A CC CC Low Level Output Voltage V = 4V, I = 8mA CC OL 450 800 V mV OL1 (OUTPUT 1) -40C T +85C 1000 amb Low Level Output Voltage V = 5V, I = 8mA CC OL 450 800 V mV OL2 (OUTPUT 2) -40C T +85C 1000 amb Low Level Output Voltage V = 5V CC 240 I nA OH1 (OUTPUT 1) -40C T +85C 1000 amb Low Level Output Voltage V = 4V CC 240 I nA OH2 (OUTPUT 2) -40C T +85C 1000 amb Response Time High to Low tphl 20 s R = 10k, C = 15pF, V = V -10mV L L CC thd Reset Pulse width (Timer enabled) ms trst -40C T +85C 125 300 500 amb 2/7