Document
TS831
MICROPOWER VOLTAGE SUPERVISOR RESET ACTIVE LOW
s ULTRA LOW POWER CONSUMPTION :
12µA maximum
s PRECISION RESET THRESHOLD s THRESHOLD VOLTAGE:
4.33V typ. FOR TS831-5
4.50V typ. FOR TS831-4
2.71V typ. FOR TS831-3
s GUARANTEED RESET OPERATION FOR
VCC DOWN TO 1V
s OPEN DRAIN OUTPUT COMPARATOR s FAST RESPONSE TIME : 20µs FOR A 10mV
OVERDRIVE
s INTERNAL BUILT-IN HYSTERESIS s PIN TO PIN COMPATIBLE WITH MC33064
AND MC33164
DESCRIPTION
The TS831 is an ultra low power integrated circuit incorporating a high stability band-gap voltage reference and a comparator with an open drain output. The threshold voltage is set at 4.33V for TS831-5, 4.5V for TS831-4 and 2.71V for TS831-3 by internal thermally matched resistors. The comparator exhibits a 20µs response (with 10mV overdrive) and has an open drain output active when input voltage is lower than the threshold. An internal hysteresis, 100mV for TS831-4 / TS831-5 and 60mV for TS831-3, increases the comparator’s noise margin and prevents false reset operation.
APPLICATION
s Power-on reset generator for microcontroller s Power failure detector
ORDER CODE
Part Number
TS831-5I TS831-4I TS831-3I
Temperature Range -40, +125°C
Package
DZP ••• ••• •••
Z= TO92 Plastic package
D = Small Outline Package (SO) - also available in Tape & Reel (DT) P = Thin Shrink Small Outline Package (TSSOP) - only available
in Tape & Reel (PT)
D SO8 (Plastic Micropackage)
Z TO92 (Plastic Package)
P TSSOP8 (Thin Shrink Small Outline Package)
PIN CONNECTIONS (top view)
SO8-TSSOP8
TO92
November 2001
1/11
TS831
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
VCC Supply Voltage 1)
VOUT Output Voltage
IOUT Output Sink Current
TS831-5 and TS831-4 TS831-3
PD Power Dissipation 2)
TO92 SO8 TSSOP8
IF
Clamp Diode Forward Current, pin 1 to pin 2 3)
TSTG Storage Temperature
1. All voltages values, except differential voltage are with respect to network ground terminal.
2. Tj = 150°C, Tamb = 25oC with Rthja = 200oC/W for TO-92 package
Rthja = 175oC/W for SO8 package Rthja = 200oC/W for TSSOP8 package
3. Maximum package power dissipation limits must be observed.
Value
7
-0.3 to Vcc + 0.3 20 5 625 700 625
100
-65 to +150
OPERATING CONDITIONS
Symbol
Parameter
VCC Supply Voltage TOPER Operating Free Air Temperature Range
Value 1 to 5.5 -40 to +125
TS831-5 ELECTRICAL CHARACTERISTICS Tamb = 25°C (unless otherwise specified)
Symbol
Parameter
Min. Typ. Max.
Threshold Voltage with VCC Increasing
VTHI
-40°C ≤ Tamb ≤ +85°C
-40°C ≤ Tamb ≤ +125°C
4.33 4.11 4.11
VTHD
Threshold Voltage with VCC Decreasing
-40°C ≤ Tamb ≤ +85°C -40°C ≤ Tamb ≤ +125°C
4.21 4.10 4.06
VHYS Hysteresis Voltage
50
100
ICC Current Consumption
VCC = 5V
Low Level Output Voltage
VCC = 4V, IOL = 8mA
450
VOL
-40°C ≤ Tamb ≤ +85°C
-40°C ≤ Tamb ≤ +125°C
IOH
High Level Output Current -40°C ≤ Tamb ≤ +125°C
VCC = 5V
2
TPHL
Response Time High to Low RL = 10kΩ, CL = 15pF, VCC = VTHD -10mV
20
Note : Limits are 100% production tested at 25°C. Lim.