®
TS834
MICROPOWER VOLTAGE SUPERVISOR
RESET ACTIVE LOW OR HIGH WITH INTEGRATED TIMER
.
.
.
.
.
.
.
.
ULTRA LOW POWER CONSUMPTION : 12µA
max. @ V
CC
= 5V
BOTH ACTIVE HIGH AND ACTIVE LOW
OUTPUTS
RESET TIMER WITH DISABLE FUNCTION
PRECISION RESET THRESHOLD (guaran-
teed over Temperature)
4.33V typ. THRESHOLD VOLTAGE
GUARANTEED RESET OPERATION DOWN
TO 1.5V
OPEN DRAIN OUTPUT WITH
V
ol
= 450mVtyp. @ I
ol
= 8mA & V
CC
= 4V
FAST RESPONSE TIME : 20µs FOR A 10mV
OVERDRIVE
100mV INTERNAL HYSTERESIS
N
DIP8
(Plastic Package)
D
SO8
(Plastic Micropackage)
P
TSSOP8
(Thin Shrink Small Outline Package)
ORDER CODES
Part Number
TS834-5I
Temperature Range
-40, +85 C
o
Package
N
•
D
•
P
•
DESCRIPTION
The TS834 is a voltage supervisor providing two
different outputs (one active low and one active
high) with an integrated timer that can be disabled.
It incorporates a high stability bandgap voltage ref-
erence 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
comparator noise margin and prevents false reset
operation.
APPLICATIONS
Computers
Microcontrollers
Microprocessor systems
Intelligent instruments
Power failure detection
PIN CONNECTIONS
Rese t Low
1
8
Rese t High
Vcc
2
7
NC
NC
3
6
NC
.
.
.
.
.
Gnd
4
5
Time r Control*
* This pin must be connecte d to Vcc or Gnd
November 1999
1/8
TS834
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CC
V
out
I
out
Pd
Supply Voltage - note 1
Output Voltage - note 1
Output Current
Power Dissipation - note 2
SO8
DIP8
TSSOP8
Parameter
Value
7
-0.3 to V
CC
+ 0.3
20
700
1200
625
-40 to +85
-65 to +150
Unit
V
V
mA
mW
T
oper
T
stg
Note:
1.
2.
Operating Free Air Temperature Range
Storage Temperature
All voltages values, except differential voltage are with respect to network ground terminal.
o
o
o
T
j
= 150 C, T
amb
= 25 C with R
thja
= 175 C/W for SO8 package
o
R
thja
= 100 C/W for DIP8 package
o
R
thja
= 200 C/W for TSSOP8 package
o
o
C
C
OPERATING CONDITIONS
Symbol
V
CC
Supply Voltage
Parameter
Value
1.5 to 5.5
Unit
V
TS834-5
o
ELECTRICAL CHARACTERISTICS
T
amb
= 25 C (unless otherwise specified)
Symbol
V
thi
V
thd
V
hys
I
CC
V
OL1
V
OL2
I
OH1
I
OH2
tphl
Parameter
Threshold Voltage
V
CC
Increasing
Threshold Voltage
V
CC
Decreasing
Hysteresis Voltage
Test Condition
Min.
4.10
Typ.
4.33
Max.
4.46
Unit
V
V
T
amb
= 25 C
o
-40
≤
T
amb
≤
+85 C
T
amb
= 25 C
o
-40
≤
T
amb
≤
+85 C
V
CC
= 5V
V
CC
= 4V, I
OL
= 8mA,
o
-40
≤
T
amb
≤
+85 C
V
CC
= 5V, I
OL
= 8mA,
o
-40
≤
T
amb
≤
+85 C
V
CC
= 5V
o
-40
≤
T
amb
≤
+85 C
V
CC
= 4V
o
-40
≤
T
amb
≤
+85 C
R
L
= 10kΩ, C
L
= 15pF
V
CC
= V
thd
-10mV
o
o
4.23
4.10
50
100
450
450
2
2
20
4.46
200
12
800
1000
800
1000
40
1000
40
1000
mV
µA
mV
mV
nA
nA
µs
Current Consumption
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)
Response Time High to Low
2/8
TS834
TIMING DIAGRAMS
All the timing diagrams are given with outputs loaded by 10k
W
resistors to V
CC
.
Vcc+
Input
Timer Control
Vcc
RESE T
OUTPUT
Timer
Vcc
RESE T
OUTP UT
Vref
Time r e nable : timer control to Vcc
Time r dis able : time r control to Gnd
GND
Active Low Reset, Timer Enabled
Active Low Reset, Timer Disabled
Active High Reset, Timer Enabled
Active High Reset, Timer Disabled
3/8
TS834
Voltage Threshold (Vthi) vs Temperature
Current Consumption vs Temperature
Timer Period (trst) vs Temperature
Vol vs Temperature
Output Voltage vs Input
Output Voltage vs Input
4/8
TS834
Vol vs Isink
Schematic to Measure Vol vs Isink
Vc c
Vc c=4V
TS834
Is ink
Re s e t =low
Vcc =5V
Vc c
TS834
Is ink
Re s e t=low
Reset High After Vcc Transition
(timer disabled)
Reset Low After Vcc Transition
(timer disabled)
5/8
