ST TS831 User Manual
TS831
MICROPOWER VOLTAGE SUPERVISOR
RESET ACTIVE LOW
■ ULTRA LOW POWER CONSUMPTION :
12µA maximum
■ PRECISIO N RESET THRESH O L D
■ THRESHOLD VOLTAGE:
4.33V typ. FOR TS831-5
4.50V typ. FOR TS831-4
2.71V typ. FOR TS831-3
■ GUARANTEED RESET OPERATION FOR
V
CC DOWN TO 1V
■ OPEN DRAIN OUTPUT COMPARATOR
■ FAST RESPONSE TIME : 20µs FOR A 10mV
OVERDRIVE
■ INTERNAL BUILT-IN HYSTERESIS
■ 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 op eration.
D
(Plastic Micropackage)
SO8
P
TSSOP8
(Thin Shrink Small Outline Package)
TO92
(Plastic Package)
PIN CONNECTIONS (top view)
SO8-TSSOP8
Z
APPLICATION
■ Power-on reset generator for microcontroller
■ Power failure detector
ORDER CODE
Part Number Temperature Range
TS831-5I
TS831-4I
TS831-3I
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)
November 2001
-40, +125°C
Package
DZP
•••
•••
•••
TO92
1/11
TS831
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
V
I
T
1. All voltages values, except differential voltage are with respect to network ground terminal.
2. T
j
3. Maximum package power dissipation limits must be observed.
Supply Voltage
CC
Output Voltage
OUT
Output Sink Current TS831-5 and TS831-4
OUT
P
Power Dissipation 2) TO92
D
I
Clamp Diode Forward Current, pin 1 to pin 2
F
Storage Temperature -65 to +150 °C
STG
= 150°C, T
= 25oC with Rthja = 200oC/W for TO-92 package
amb
OPERATING CONDITIONS
Symbol Parameter Value Unit
V
T
OPER
Supply Voltage 1 to 5.5 V
CC
Operating Free Air Temperature Range -40 to +125 °C
1)
Rthja = 175
Rthja = 200
TS831-3
SO8
TSSOP8
o
C/W for SO8 package
o
C/W for TSSOP8 package
7V
-0.3 to V
+ 0.3
cc
20
5
625
700
625
3)
100 mA
V
mA
mW
TS831-5
ELECTRICAL CHARACTERISTICS Tamb = 25°C (unless otherwise specified)
Symbol Parameter Min. Typ. Max. Unit
V
THI
-40°C ≤ Tamb ≤ +85°C
-40°C ≤ Tamb ≤ +125°C
4.11
4.11
Threshold Voltage with VCC Decreasing
Threshold Voltage with VCC Increasing
V
THD
-40°C ≤ Tamb ≤ +85°C
-40°C ≤ Tamb ≤ +125°C
V
Hysteresis Voltage 50 100 200 mV
HYS
I
Current Consumption VCC = 5V
CC
4.10
4.06
Low Level Output Voltage VCC = 4V, IOL = 8mA
V
OL
-40°C ≤ Tamb ≤ +85°C
-40°C ≤ Tamb ≤ +125°C
High Level Output Current VCC = 5V
I
OH
T
PHL
Note : Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation and by design.
-40°C ≤ Tamb ≤ +125°C
Response Time High to Low
R
= 10kΩ, CL = 15pF, VCC = V
L
THD
-10mV
4.33
4.46
4.50
4.21
4.46
4.46
12
450 800
1000
1300
2 100
1000
20
V
V
µ
mV
nA
µ
A
s
2/11
TS831
TS831-4
ELECTRICAL CHARACTERISTICS Tamb = 25°C (unless otherwise specified)
Symbol Parameter Min. Typ. Max. Unit
Threshold Voltage with VCC Increasing
V
THI
-40°C ≤ Tamb ≤ +85°C
-40°C ≤ Tamb ≤ +125°C
4.18
4.18
Threshold Voltage with VCC Decreasing
V
THD
-40°C ≤ Tamb ≤ +85°C
-40°C ≤ Tamb ≤ +125°C
V
Hysteresis Voltage 50 100 200 mV
HYS
Current Consumption VCC = 5V
I
CC
4.17
4.13
Low Level Output Voltage VCC = 4V, IOL = 8mA
V
OL
-40°C ≤ Tamb ≤ +85°C
-40°C ≤ Tamb ≤ +125°C
High Level Output Current VCC = 5V
I
OH
T
PHL
Note : Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation and by design.
-40°C ≤ Tamb ≤ +125°C
Response Time High to Low
= 10kΩ, CL = 15pF, VCC = V
R
L
THD
-10mV
4.50
4.66
4.70
4.40
4.66
4.66
12
450 800
1000
1300
2 100
1000
20
V
V
µ
mV
nA
µ
A
s
TS831-3
ELECTRICAL CHARACTERISTICS Tamb = 25°C (unless otherwise specified)
Symbol Parameter Min. T yp. Max. Unit
V
V
V
V
T
Note : Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation and by design.
Threshold Voltage with VCC Increasing
THI
THD
HYS
I
CC
OL
I
OH
PHL
-40°C ≤ Tamb ≤ +125°C
Threshold Voltage with VCC Decreasing
-40°C ≤ Tamb ≤ +125°C
Hysteresis Voltage 30 60 100 mV
Current Consumption VCC = 3V
Low Level Output Voltage VCC = 2.4V, IOL = 1mA
-40°C ≤ Tamb ≤ +125°C
High Level Output Current VCC = 3V
-40°C ≤ Tamb ≤ +125°C
Response Time High to Low
R
= 10kΩ, CL = 15pF, VCC = V
L
THD
-10mV
2.55
2.55
2.71
2.8
2.65
2.8
12
140 400
500
2 100
1000
20
V
V
µ
mV
nA
µ
A
s
3/11
TS831
EQUIVALENT SCHEMATIC DIAGRAM
1.2V Vref
INPUT (Vcc)
OUTPUT
GND
TIMING DIAGRAM
4/11
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