TS834 MICROPOWER VOLTAGE SUPERVISOR RESET ACTIVE LOW OR HIGH 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 D SO8 (Plastic Micropackage) TO 1.5V ■ OPEN DRAIN OUTPUT WITH ■ Vol = 450mV typ.@ Iol = 8mA & VCC = 4V ■ FAST RESPONSE TIME : 20µs FOR A 10mV OVERDRIVE ■ 100mV INTERNAL HYSTERESIS P TSSOP8 (Thin Shrink Small Outline Package) 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 ORDER CODE Package Part Number Temperature Range TS834-5I -40, +85°C D P • • 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) Reset Low 1 8 Reset High Vcc 2 7 NC NC 3 6 NC Gnd 4 5 Timer Control* operation. APPLICATION ■ ■ ■ ■ ■ Computers Microcontrollers Microprocessor systems Intelligent instruments Power failure detection January 2001 * This pin must be connected to Vcc or Gnd 1/7 TS834 ABSOLUTE MAXIMUM RATINGS Symbol Parameter VCC Supply Voltage Vout Output Voltage - See note 1 Iout Output Current Pd Toper Tstg Value Unit 7 V -0.3 to Vcc + 0.3 V 1) 20 mA 700 625 mW Operating Free Air Temperature Range -40 to +85 °C Storage Temperature -65 to +150 °C Value Unit Power Dissipation 2) SO8 TSSOP8 1. All voltages values, except differential voltage are with respect to network ground terminal. 2. T j = 150°C, Tamb = 25oC with Rthja = 175oC/W for SO8 package Rthja = 200oC/W for TSSOP8 package OPERATING CONDITIONS Symbol VCC Toper Parameter Supply Voltage 1.5 to 5.5 V Operating Free Air Temperature Range -40 to +85 °C TS834-5 ELECTRICAL CHARACTERISTICS Tamb = 25°C (unless otherwise specified) Symbol Vthi Vthd Parameter Min. Threshold Voltage - VCC Increasing Tamb = 25°C -40°C ≤ Tamb ≤ +85°C 4.10 Threshold Voltage - VCC Decreasing Tamb = 25°C -40°C ≤ Tamb ≤ +85°C 4.10 Typ. Max. 4.33 V 4.46 4.23 Vhys Hysteresis Voltage ICC Current Consumption VCC = 5V VOL1 Low Level Output Voltage (OUTPUT 1) VCC = 4V, IOL = 8mA -40°C ≤ Tamb ≤ +85°C VOL2 Low Level Output Voltage (OUTPUT 2) IOH1 V 4.46 200 mV 12 µA 450 800 1000 mV VCC = 5V, IOL = 8mA -40°C ≤ Tamb ≤ +85°C 450 800 1000 mV Low Level Output Voltage (OUTPUT 1) VCC = 5V -40°C ≤ Tamb ≤ +85°C 2 40 1000 nA IOH2 Low Level Output Voltage (OUTPUT 2) VCC = 4V -40°C ≤ Tamb ≤ +85°C 2 40 1000 nA tphl Response Time High to Low RL = 10kΩ, CL = 15pF, VCC = Vthd -10mV trst Reset Pulse width (Timer enabled) -40°C ≤ Tamb ≤ +85°C 2/7 50 Unit 100 µs 20 ms 125 300 500 TS834 TIMING DIAGRAMS All the timung diagrams are given with outputs loaded by 10 kΩ resistors to VCC Vcc+ Input Vcc Timer Control RESET OUTPUT Timer Vcc Vref GND RESET OUTPUT Timer enable : timer control to Vcc Timer disable : timer control to Gnd Active Low Reset, Timer Enabled Active High Reset, Timer Enabled Active Low Reset, Timer Disabled Active High Reset, Timer Disabled 3/7 TS834 Voltage Threshold (Vthi) vs Temperature Vol vs Temperature Current Consumption vs Temperature Output Voltage vs Input Timer Period (trst) vs Temperature Output Voltage vs Input 4/7 TS834 Vol vs Isink Reset High After Vcc Tansition (timer disabled) Schematic to Measure Vol vs Isink Reset Low After Vcc Tansition (timer disabled) Vcc Vcc=4V Isink TS834 Reset =low Reset Vin Gnd Reset Vcc=5V Vcc TS834 Reset Isink Vin Gnd Reset Reset=low 5/7 TS834 PACKAGE MECHANICAL DATA 8 PINS - PLASTIC MICROPACKAGE (SO) Millimeters Inches Dim. Min. A a1 a2 a3 b b1 C c1 D E e e3 F L M S Typ. Max. 0.65 0.35 0.19 0.25 1.75 0.25 1.65 0.85 0.48 0.25 0.5 4.8 5.8 5.0 6.2 0.1 Min. Typ. Max. 0.026 0.014 0.007 0.010 0.069 0.010 0.065 0.033 0.019 0.010 0.020 0.189 0.228 0.197 0.244 0.004 45° (typ.) 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 8° (max.) 6/7 TS834 PACKAGE MECHANICAL DATA 8 PINS - THIN SHRINK SMALL OUTLINE PACKAGE k c 0.25mm .010 inch GAGE PLANE L1 L L L1 C SEATING PLANE E1 A E A2 A1 4 4 5 5 D b e 1 1 8 8 PIN 1 IDENTIFICATION Millimeters Inches Dim. Min. A A1 A2 b c D E E1 e k l L L1 0.05 0.80 0.19 0.09 2.90 4.30 0° 0.50 0.45 Typ. 1.00 3.00 6.40 4.40 0.65 0.60 0.600 1.000 Max. Min. 1.20 0.15 1.05 0.30 0.20 3.10 0.01 0.031 0.007 0.003 0.114 4.50 0.169 8° 0.75 0.75 0° 0.09 0.018 Typ. 0.039 0.118 0.252 0.173 0.025 0.0236 0.024 0.039 Max. 0.05 0.006 0.041 0.15 0.012 0.122 0.177 8° 0.030 0.030 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 publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. 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