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TS834
MICROPOWER VOLTAGE SUPERVISOR RESET ACTIVE LOW OR HIGH INTEGRATED TIMER
s ULTRA LOW POWER CONSUMPTION :
12A max. @ VCC = 5V s BOTH ACTIVE HIGH AND ACTIVE LOW OUTPUTS
s RESET TIMER WITH DISABLE FUNCTION s PRECISION RESET THRESHOLD (guaranteed over Temperature)
s 4.33V typ. THRESHOLD VOLTAGE s GUARANTEED RESET OPERATION DOWN
TO 1.5V
s OPEN DRAIN OUTPUT WITH s Vol = 450mV typ.@ Iol = 8mA & VCC = 4V s FAST RESPONSE TIME : 20s FOR A 10mV
OVERDRIVE
D SO8 (Plastic Micropackage)
s 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 20s response (with 10mV overdrive). An internal hysteresis of 100mV increases the comparator noise margin and prevents false reset operation.
ORDER CODE
Package Part Number TS834-5I Temperature Range D -40, +85C * 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 NC
Vcc
2
7
APPLICATION
s s s s s
Computers Microcontrollers Microprocessor systems Intelligent instruments Power failure detection
NC
3
6
NC
Gnd
4
5
Timer Control*
* This pin must be connected to Vcc or Gnd
January 2001
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TS834
ABSOLUTE MAXIMUM RATINGS
Symbol VCC Vout Iout Pd Toper Tstg Supply Voltage Output Current Power Dissipation
2) 1)
Parameter
Value 7 -0.3 to Vcc + 0.3 20
Unit V V mA mW C C
Output Voltage - See note 1 SO8 TSSOP8
700 625 -40 to +85 -65 to +150
Operating Free Air Temperature Range Storage Temperature
1. All voltages values, except differential voltage are with respect to network ground terminal. 2. T j = 150C, Tamb = 25oC with Rthja = 175oC/W for SO8 package Rthja = 200oC/W for TSSOP8 package
OPERATING CONDITIONS
Symbol VCC Toper Supply Voltage Operating Free Air Temperature Range Parameter Value 1.5 to 5.5 -40 to +85 Unit V C
TS834-5 ELECTRICAL CHARACTERISTICS Tamb = 25C (unless otherwise specified)
Symbol Vthi Parameter Threshold Voltage - VCC Increasing Tamb = 25C -40C Tamb +85C Threshold Voltage - VCC Decreasing Tamb = 25C -40C Tamb +85C Hysteresis Voltage Current Consumption Low Level Output Voltage (OUTPUT 1) Low Level Output Voltage (OUTPUT 2) Low Level Output Voltage (OUTPUT 1) Low Level Output Voltage (OUTPUT 2) VCC = 5V VCC = 4V, IOL = 8mA -40C Tamb +85C VCC = 5V, IOL = 8mA -40C Tamb +85C VCC = 5V -40C Tamb +85C VCC = 4V -40C Tamb +85C 450 450 2 2 Min. Typ. 4.33 4.10 4.23 4.10 50 100 4.46 200 12 800 1000 800 1000 40 1000 40 1000 mV A mV mV nA nA s ms 125 300 500 4.46 V Max. Unit V
Vthd Vhys ICC VOL1 VOL2 IOH1 IOH2 tphl trst
Response Time High to Low RL = 10k, CL = 15pF, VCC = Vthd -10mV Reset Pulse width (Timer enabled) -40C Tamb +85C
20
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TS834
TIMING DIAGRAMS
All the timung diagrams are given with outputs loaded by 10 k resistors to VCC
Vcc+ Input
Vcc
Timer Control
RESET OUTPUT Timer Vcc RESET OUTPUT Timer enable : timer control to Vcc Timer disable : timer control to Gnd
Vref
GND
Active Low Reset, Timer Enabled
Active High Reset, Timer Enabled
Active Low Reset, Timer Disabled
Active High Reset, Timer Disabled
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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
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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
TS834
Reset Vin Gnd Reset
Isink Reset =low
Vcc=5V
Vcc
TS834
Reset Vin Gnd Reset
Isink Reset=low
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TS834
PACKAGE MECHANICAL DATA 8 PINS - PLASTIC MICROPACKAGE (SO)
Millimeters Dim. Min. A a1 a2 a3 b b1 C c1 D E e e3 F L M S 0.1 0.65 0.35 0.19 0.25 4.8 5.8 1.27 3.81 3.8 0.4 4.0 1.27 0.6 8 (max.) 0.150 0.016 Typ. Max. 1.75 0.25 1.65 0.85 0.48 0.25 0.5 45 (typ.) 5.0 6.2 0.189 0.228 Min. 0.004 0.026 0.014 0.007 0.010
Inches Typ. Max. 0.069 0.010 0.065 0.033 0.019 0.010 0.020 0.197 0.244 0.050 0.150 0.157 0.050 0.024
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TS834
PACKAGE MECHANICAL DATA 8 PINS - THIN SHRINK SMALL OUTLINE PACKAGE
k c
0.25mm .010 inch GAGE PLANE
L1
L
L
L1
E1
SEATING PLANE
A A2 A1 5 D b 8
8
C
E
4 e
5
PIN 1 IDENTIFICATION
Millimeters 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. Max. 1.20 0.15 1.05 0.30 0.20 3.10 4.50 8 0.75 0.75 Min. 0.01 0.031 0.007 0.003 0.114 0.169 0 0.09 0.018
1
4
1
Inches Typ. Max. 0.05 0.006 0.041 0.15 0.012 0.122 0.177 8 0.030 0.030
1.00
0.039
3.00 6.40 4.40 0.65 0.60 0.600 1.000
0.118 0.252 0.173 0.025 0.0236 0.024 0.039
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. 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 registered trademark of STMicroelectronics (c) 2001 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 (c) http://www.st.com
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