TS831
MICROPOWER VOLTAGE SUPERVISOR
RESET ACTIVE LOW
s
ULTRA LOW POWER CONSUMPTION :
s
s
12µA maximum
PRECISION RESET THRESHOLD
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
s
s
s
s
s
D
SO8
(Plastic Micropackage)
Z
TO92
(Plastic Package)
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
P
TSSOP8
(Thin Shrink Small Outline Package)
PIN CONNECTIONS
(top view)
SO8-TSSOP8
s
Power-on reset generator for microcontroller
s
Power failure detector
ORDER CODE
Package
Part Number
TS831-5I
TS831-4I
TS831-3I
Temperature Range
D
-40, +125°C
•
•
•
Z
•
•
•
P
•
•
•
TO92
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
1/11
TS831
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CC
V
OUT
I
OUT
P
D
Supply Voltage
1)
Output Voltage
Output Sink Current
Power Dissipation
2)
TS831-5 and TS831-4
TS831-3
TO92
SO8
TSSOP8
Parameter
Value
7
-0.3 to V
cc
+ 0.3
20
5
625
700
625
100
-65 to +150
Unit
V
V
mA
mW
mA
°C
I
F
T
STG
Clamp Diode Forward Current, pin 1 to pin 2
3)
Storage Temperature
1. All voltages values, except differential voltage are with respect to network ground terminal.
2. T
j
= 150°C, T
amb
= 25
o
C with Rthja = 200
o
C/W for TO-92 package
Rthja = 175
o
C/W for SO8 package
Rthja = 200
o
C/W for TSSOP8 package
3. Maximum package power dissipation limits must be observed.
OPERATING CONDITIONS
Symbol
V
CC
T
OPER
Supply Voltage
Operating Free Air Temperature Range
Parameter
Value
1 to 5.5
-40 to +125
Unit
V
°C
TS831-5
ELECTRICAL CHARACTERISTICS
Tamb = 25°C (unless otherwise specified)
Symbol
V
THI
Parameter
Threshold Voltage with V
CC
Increasing
-40°C
≤
Tamb
≤
+85°C
-40°C
≤
Tamb
≤
+125°C
Threshold Voltage with V
CC
Decreasing
-40°C
≤
Tamb
≤
+85°C
-40°C
≤
Tamb
≤
+125°C
Hysteresis Voltage
Current Consumption
Low Level Output Voltage
-40°C
≤
Tamb
≤
+85°C
-40°C
≤
Tamb
≤
+125°C
High Level Output Current
-40°C
≤
Tamb
≤
+125°C
V
CC
= 5V
V
CC
= 4V, I
OL
= 8mA
450
Min.
4.11
4.11
4.21
4.10
4.06
50
100
4.46
4.46
200
12
800
1000
1300
100
1000
V
mV
µA
mV
Typ.
4.33
4.46
4.50
V
Max.
Unit
V
THD
V
HYS
I
CC
V
OL
I
OH
T
PHL
V
CC
= 5V
2
nA
µs
Response Time High to Low
R
L
= 10kΩ, C
L
= 15pF, V
CC
= V
THD
-10mV
20
Note :
Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation and by design.
2/11
TS831
TS831-4
ELECTRICAL CHARACTERISTICS
Tamb = 25°C (unless otherwise specified)
Symbol
V
THI
Parameter
Threshold Voltage with V
CC
Increasing
-40°C
≤
Tamb
≤
+85°C
-40°C
≤
Tamb
≤
+125°C
Threshold Voltage with V
CC
Decreasing
-40°C
≤
Tamb
≤
+85°C
-40°C
≤
Tamb
≤
+125°C
Hysteresis Voltage
Current Consumption
Low Level Output Voltage
-40°C
≤
Tamb
≤
+85°C
-40°C
≤
Tamb
≤
+125°C
High Level Output Current
-40°C
≤
Tamb
≤
+125°C
V
CC
= 5V
V
CC
= 4V, I
OL
= 8mA
450
Min.
4.18
4.18
4.40
4.17
4.13
50
100
4.66
4.66
200
12
800
1000
1300
100
1000
V
mV
µA
mV
Typ.
4.50
4.66
4.70
V
Max.
Unit
V
THD
V
HYS
I
CC
V
OL
I
OH
T
PHL
V
CC
= 5V
2
nA
µs
Response Time High to Low
R
L
= 10kΩ, C
L
= 15pF, V
CC
= V
THD
-10mV
20
Note :
Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation and by design.
TS831-3
ELECTRICAL CHARACTERISTICS
Tamb = 25°C (unless otherwise specified)
Symbol
V
THI
V
THD
V
HYS
I
CC
V
OL
I
OH
T
PHL
Parameter
Threshold Voltage with V
CC
Increasing
-40°C
≤
Tamb
≤
+125°C
Threshold Voltage with V
CC
Decreasing
-40°C
≤
Tamb
≤
+125°C
Hysteresis Voltage
Current Consumption
Low Level Output Voltage
-40°C
≤
Tamb
≤
+125°C
High Level Output Current
-40°C
≤
Tamb
≤
+125°C
V
CC
= 3V
V
CC
= 2.4V, I
OL
= 1mA
V
CC
= 3V
140
2
Min.
2.55
2.65
2.55
30
60
2.8
100
12
400
500
100
1000
Typ.
2.71
2.8
Max.
Unit
V
V
mV
µA
mV
nA
µs
Response Time High to Low
R
L
= 10kΩ, C
L
= 15pF, V
CC
= V
THD
-10mV
20
Note :
Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation and by design.
3/11
TS831
EQUIVALENT SCHEMATIC DIAGRAM
INPUT (Vcc)
OUTPUT
1.2V Vref
GND
TIMING DIAGRAM
4/11
TS831
Output voltage versus Vcc
5
TS831- 3
RL = 10 k
Ω
T=25°C
Reset output voltage versus Vcc
5
TS831- 3
RL = 10 k
Ω
T=25°C
Output Voltage (V)
Output Voltage (V)
4
4
3
3
2
2
1
1
0
0
1
2
3
4
5
0
2.600
2.625
2.650
2.675
2.700
2.725
2.750
Vcc (V)
Vcc (V)
Output voltage versus Vcc
5
TS831- 4
RL = 10 k
Ω
T=25°C
Reset output voltage versus Vcc
5
Output Voltage (V)
Output Voltage (V)
4
4
TS831- 4
RL = 10 k
Ω
T=25°C
3
3
2
2
1
1
0
0
1
2
3
4
5
0
4.40
4.45
4.50
4.55
4.60
Vcc (V)
Vcc (V)
Output voltage versus Vcc
5
TS831- 5
RL = 10 k
Ω
T=25°C
Reset output voltage versus Vcc
5
Output Voltage (V)
Output Voltage (V)
4
4
TS831- 5
RL = 10 k
Ω
T=25°C
3
3
2
2
1
1
0
0
1
2
3
4
5
0
4.20
4.25
4.30
4.35
4.40
Vcc (V)
Vcc (V)
5/11
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