Page 1
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
Page 2
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
Page 3
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
Page 4
TS831
EQUIVALENT SCHEMATIC DIAGRAM
1.2V Vref
INPUT (Vcc)
OUTPUT
GND
TIMING DIAGRAM
4/11
Page 5
TS831
Output voltage versus Vcc
5
4
3
2
Output Voltage (V)
1
0
012345
Output voltage
5
4
3
2
Output Voltage (V)
1
TS831- 3
RL = 10 kΩ
T=25°C
Vcc (V)
versus Vcc
TS831- 4
RL = 10 k
Ω
T=25°C
Reset output voltage versus Vcc
5
4
3
2
Output Volta ge (V)
1
0
2.600 2.625 2.650 2.675 2.700 2.725 2.750
TS831- 3
RL = 10 k
T=25°C
Ω
Vcc (V)
Reset output voltage versus Vcc
5
4
TS831- 4
RL = 10 k
T=25°C
Ω
Output Voltage (V)
3
2
1
0
012345
Vcc (V)
Output voltage versus Vcc
5
4
3
2
Output Voltage (V)
1
0
012345
TS831- 5
RL = 10 k
T=25°C
Vcc (V)
Ω
0
4.40 4.45 4.50 4.55 4.60
Vcc (V)
Reset output voltage versus Vcc
5
4
3
2
Output Voltage (V)
1
0
4.20 4.25 4.30 4.35 4.40
TS831- 5
RL = 10 k
T=25°C
Ω
Vcc (V)
5/11
Page 6
TS831
V
versus temperature
THI
V
versus temperature
THD
4.60
TS831- 4
4.55
x
a
m
I
V
H
T
(V)
4.50
THI
V
4.45
4.40
-40-200 20406080100120
m
I
V
H
T
n
i
Temperature (°C)
Hysteresis voltage versus temperature
160
140
120
100
Hysteresis (mV)
80
TS831- 4
No load
4.44
V
max
4.42
4.40
(V)
4.38
THD
V
4.36
4.34
4.32
-40 -20 0 20 40 60 80 100 120
THD
V
min
THD
Temperature (°C)
TS831-4
Supply current versus temperature
10.0
9.5
9.0
Supply current (µA )
8.5
Icc max
Icc min
TS831- 4
Vcc=5V
No load
60
-40-200 20406080100120
Temperature (°C)
Supply current vs Vcc & temperature
12
TS831- 3
10
No load
8
6
+125°C
Supply current (µA )
4
2
0
012345
-40°C
+25°C
Vcc (V)
8.0
-40-200 20406080100120
Temperature (°C)
Voltage output low vs Isink & temperature
TS831- 3
2.0
Input voltage=2 .4 V
+25°C
I
SINK
+125°C
+85°C
(mA)
1.5
(V)
OL
V
1.0
- 40°C
0.5
0.0
012345
6/11
Page 7
TS831
Supply current vs Vcc & temperature
10
TS831- 4
No load
8
6
4
Supply current (µA)
2
0
012345
+125°C
- 40°C
+85°C
+25°C
Vcc (V)
Supply current vs Vcc & temperature
10
TS831- 5
Supply current (µA)
No load
8
6
4
2
+85°C
- 40°C
+125°C
+25°C
Voltage output low vs Isink & temperature
4
TS831- 4
Vcc= 4 V
3
(V)
2
OL
V
1
0
0 5 10 15 20
- 40°C
I
SINK
+125°C
+85°C
+25°C
(mA)
Voltage output low vs Isink & temperature
4
TS831- 5
Vcc=4 V
3
(V)
2
OL
V
1
- 40°C
+125°C
+85°C
+25°C
0
012345
Vcc (V )
Clamp diode forward current versus voltage
100
Vcc=0 V
80
T=25°C
60
40
Forward current (mA)
20
0
0.0 0.5 1.0 1.5
Forward voltage (V)
0
0 5 10 15 20
I
(mA)
SINK
Response time
5 V
4 V
5 V
4 V
Response time
0 20406080
Reset output
Time (µs)
Vcc
TS831- 4
RL = 10 k
T=25°C
Ω
0 V
7/11
Page 8
TS831
Basic configuration
n
i
Power
TS831
Supply
d
n
G
Special remarks
* Some m icroprocessor may integrate the pull up resistor.
* For the pull up resistor choice, please use the graphs nammed "Voltage
output low vs Isink & temperature" depending on TS831 versions.
Pull up
resistor
Reset
Microprocessor
circuit
8/11
Page 9
PACKAGE MECHANICAL DATA
8 PINS - PLASTIC MICROPACKAGE (SO)
TS831
Dim.
Min. Typ. Max. Min. Typ. Max.
A 1.75 0.069
a1 0.1 0.25 0.004 0.010
a2 1.65 0.065
a3 0.65 0.85 0.026 0.033
b 0.35 0.48 0.014 0.019
b1 0.19 0.25 0.007 0.010
C 0.25 0.5 0.010 0.020
c1 45° (typ.)
D 4.8 5.0 0.189 0.197
E 5.8 6.2 0.228 0.244
e 1.27 0.050
e3 3.81 0.150
F 3.8 4.0 0.150 0.157
L 0.4 1.27 0.016 0.050
M 0.6 0.024
S 8° (max.)
Millimeters Inches
9/11
Page 10
TS831
PACKAGE MECHANICAL DATA
3 PINS - PLASTIC PACKAGE TO92
Dim.
Min Typ. Max. Min. Typ. Max.
L 1.27 0.05
B 3.2 3.7 4.2 0.126 0.1457 0.1654
O1 4.45 5.00 5.2 0.1752 0.1969 0.2047
C 4.58 5.03 5.33 0.1803 0.198 0.2098
K 12.7 0.5
O2 0.407 0.5 0.508 0.016 0.0197 0.02
a 0.35 0.0138
Millimeters Inches
10/11
Page 11
PACKAGE MECHANICAL DATA
8 PINS - THIN SHRINK SMALL OUTL INE PAC KAGE
TS831
c
E1
A2
A1
D
b
C
aaa
0,25 mm
.010 inch
GAGE PLANE
PLANE
SEATING
5
8
PIN 1 IDENTIFICATION
k
L
L1
C
EA
e
14
Millimeters Inches
Dim.
Min. Typ. Max. Min. Typ. Max.
A 1.20 0.05
A1 0.05 0.15 0.01 0.006
A2 0.80 1.00 1.05 0.031 0.039 0.041
b 0.19 0.30 0.007 0.15
c 0.09 0.20 0.003 0.012
D 2.90 3.00 3.10 0.114 0.118 0.122
E 6.40 0.252
E1 4.30 4.40 4.50 0.169 0.173 0.177
e 0.65 0.025
k 0° 8° 0° 8°
l 0.50 0.60 0.75 0.09 0.0236 0.030
Information furnished is bel ieved to be accurate and reliable. However, STMicroe lectronics 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 li cense is granted by implica tion or otherwise under any patent or patent rig hts of STMicroelectronics. Specifications
mentioned in this publication ar e subject to change without notice. This publication supersedes and replaces all information
previously supplied. S TMicroelectronics products are not authorized for use as critica l components in life suppo rt devices or
systems without express written approval of STMicroelectronics.
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