TS834
MICROPOWER VOLTAGE SUPERVISOR
RESET ACTIVE LOW OR HIGH WITH INTEGRATED TIMER
.
ULTRALOW POWER CONSUMPTION :12µA
max. @ V
.
BOTH ACTIVE HIGH ANDACTIVE LOW
OUTPUTS
.
RESET TIMER WITH DISABLE FUNCTION
.
PRECISION RESET THRESHOLD (guaranteed over Temperature)
.
4.33V typ. THRESHOLD VOLTAGE
GUARANTEED RESET OPERATION DOWN
TO 1.5V
.
OPEN DRAIN OUTPUT WITH
= 450mVtyp. @ Iol= 8mA & VCC=4V
V
ol
.
FASTRESPONSE TIME : 20µs FOR A 10mV
OVERDRIVE
.
100mV INTERNAL HYSTERESIS
CC
=5V
N
DIP8
(Plastic Package)
(Thin Shrink Small Outline Package)
(Plastic Micropackage)
P
TSSOP8
D
SO8
DESCRIPTION
The TS834 is a voltage supervisor providing two
different outputs (one active low and one active
high)with anintegratedtimer thatcanbedisabled.
It incorporates a high stability bandgapvoltage 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 20µs response (with
10mV overdrive).
An internal hysteresis of 100mV increases the
comparatornoisemarginand preventsfalsereset
operation.
APPLICATIONS
.
Computers
.
Microcontrollers
.
Microprocessor systems
.
Intelligent instruments
.
Power failure detection
ORDER CODES
Part Number Temperature Range
TS834-5I -40, +85
PIN CONNECTIONS
Reset Low
* This pin m ust be connected to Vcc or G nd
Vcc
NC
Gnd
1
2
3
4
o
C
8
7
6
5
Package
NDP
•••
Rese t High
NC
NC
Timer Control*
November 1999
1/8
TS834
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
CC
V
out
I
out
Pd Power Dissipation - note 2 SO8
T
oper
T
stg
Note: 1. All voltages values, except differential voltage are with respect to network ground terminal.
OPERATINGCONDITIONS
Symbol Parameter Value Unit
V
CC
TS834-5
ELECTRICAL CHARACTERISTICS T
Symbol Parameter
V
thi
V
thd
V
hys
I
CC
V
OL1
V
OL2
I
OH1
I
OH2
tphl Response Time High to Low
Supply Voltage - note 1 7 V
Output Voltage - note 1 -0.3 to VCC+ 0.3 V
Output Current 20 mA
700
DIP8
TSSOP8
1200
625
Operating Free Air Temperature Range -40 to +85
Storage Temperature -65 to +150
2. T
= 150oC, T
j
=25oC with R
amb
= 175oC/W for SO8 package
thja
= 100oC/W for DIP8 package
R
thja
= 200oC/W for TSSOP8 package
R
thja
Supply Voltage 1.5 to 5.5 V
=25oC (unless otherwise specified)
amb
Threshold Voltage
V
Increasing
CC
Threshold Voltage
V
Decreasing
CC
Hysteresis Voltage
Test Condition
=25oC
T
amb
-40 ≤ T
amb
=25oC
T
amb
-40 ≤ T
amb
≤ +85oC
≤ +85oC
Min. Typ. Max. Unit
4.33
4.10
4.23
4.10
50 100 200 mV
Current Consumption VCC=5V 12
Low Level Output Voltage
(OUTPUT 1)
Low Level Output Voltage
(OUTPUT 2)
Output Off-state Leakage current
(OUTPUT 1)
Output Off-state Leakage current
(OUTPUT 2)
VCC= 4V, IOL= 8mA,
-40 ≤ T
≤ +85oC
amb
VCC= 5V, IOL= 8mA,
-40 ≤ T
≤ +85oC
amb
VCC=5V
-40 ≤ T
≤ +85oC
amb
VCC=4V
-40 ≤ T
R
L
V
CC=Vthd
≤ +85oC
amb
= 10kΩ,CL= 15pF
-10mV
450 800
450 800
240
240
20
4.46
4.46
1000
1000
1000
1000
mW
o
C
o
C
V
V
µA
mV
mV
nA
nA
µs
2/8
TIMING DIAGRAMS
All the timing diagrams are given with outputs loaded by 10k
Wresistors to V
TS834
.
CC
Vcc+
Input
Vref
GND
Active Low Reset, Timer Enabled
Timer
Vcc
Vcc
Timer e nable : timer control to Vcc
Timer disable : timer control to Gnd
Timer Control
RESE T
OUTPUT
RESE T
OUTPUT
Active Low Reset, Timer Disabled
Active High Reset, Timer DisabledActive High Reset, Timer Enabled
3/8
TS834
Voltage Threshold (Vthi) vs Temperature Current Consumption vs Temperature
Timer Period (trst) vs Temperature Vol vs Temperature
4/8
Output Voltage vs InputOutput Voltagevs Input
TS834
Vol vs Isink
Reset High After Vcc Transition
(timer disabled)
Schematic to Measure Vol vs Isink
Vc c =4V
TS834
Vcc =5V
TS834
Vc c
Is in k
Vc c
Is in k
Reset Low After Vcc Transition
(timer disabled)
Rese t =low
Rese t=low
5/8
TS834
PACKAGEMECHANICAL DATA
8 PINS - PLASTIC PACKAGE
Dimensions
A 3.32 0.131
a1 0.51 0.020
B 1.15 1.65 0.045 0.065
b 0.356 0.55 0.014 0.022
b1 0.204 0.304 0.008 0.012
D 10.92 0.430
E 7.95 9.75 0.313 0.384
e 2.54 0.100
e3 7.62 0.300
e4 7.62 0.300
F 6.6 0260
i 5.08 0.200
L 3.18 3.81 0.125 0.150
Z 1.52 0.060
Min. Typ. Max. Min. Typ. Max.
Millimeters Inches
6/8
PACKAGEMECHANICAL DATA
8 PINS - PLASTICMICROPACKAGE(SO)
TS834
Dim.
Min. Typ. Max. Min. Typ. Max.
Millimeters Inches
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
o
(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
S8
o
(max.)
7/8
TS834
PACKAGEMECHANICAL DATA
8 PINS - THIN SHRINK SMALL OUTLINE PACKAGE
c
GAGE PLANE
E1
A2
A1
0,25 mm
.010 inch
PLANE
SEATING
5
k
L
L1
C
EA
Dim.
D
b
Caaa
8
PIN 1 IDENTIFICATION
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
e
14
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
k0
o
o
8
o
0
l 0.50 0.60 0.75 0.09 0.0236 0.030
o
8
Information furnishedis believedto beaccurateand reliable.However, STMicroelectronicsassumesno responsibility forthe consequences of use of such information nor forany infringement of patentsor other rights of third parties which may result from its use.
No license is granted byimplication orotherwise under any patent or patent rights of STMicroelectronics. Specificationsmentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronicsproducts are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
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1999 STMicroelectronics – Printed in Italy – All Rights Reserved
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