1/7
s
ULTRA LOW POWER CONSUMPTION :
12
A max.
@
V
CC
= 5V
s
BOTH ACTIVE HIGH AND ACTIVE LOW
OUTPUTS
s
RESET TIMER WITH DISABLE FUNCTION
s
PRECISION RESET THRESHOLD (guaran-
teed over Temperature)
s
4.33V typ. THRESHOLD VOLTAGE
s
GUARANTEED RESET OPERATION DOWN
TO 1.5V
s
OPEN DRAIN OUTPUT WITH
s
Vol = 450mV typ.
@
Iol = 8mA & V
CC
= 4V
s
FAST RESPONSE TIME : 20
s FOR A 10mV
OVERDRIVE
s
100mV INTERNAL HYSTERESIS
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 dis-
abled.
It incorporates a high stability bandgap voltage
reference and a comparator with open drain out-
put.
The threshold voltage is set at 4.33V by internal
thermally matched resistors.
The comparator exhibits a 20
s response (with
10mV overdrive).
An internal hysteresis of 100mV increases the
comparator noise margin and prevents false reset
operation.
APPLICATION
s
Computers
s
Microcontrollers
s
Microprocessor systems
s
Intelligent instruments
s
Power failure detection
ORDER CODE
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
P = Thin Shrink Small Outline Package (TSSOP) - only available
in Tape & Reel (PT)
PIN CONNECTIONS (top view)
Part Number
Temperature Range
Package
D
P
TS834-5I
-40, +85C
D
SO8
(Plastic Micropackage)
P
TSSOP8
(Thin Shrink Small Outline Package)
1
2
3
4
8
7
6
5
Reset Low
Vcc
NC
Gnd
Reset High
NC
NC
Timer Control*
* This pin must be connected to Vcc or Gnd
TS834
MICROPOWER VOLTAGE SUPERVISOR
RESET ACTIVE LOW OR HIGH INTEGRATED TIMER
January 2001
TS834
2/7
ABSOLUTE MAXIMUM RATINGS
OPERATING CONDITIONS
TS834-5
ELECTRICAL CHARACTERISTICS T
amb
= 25C (unless otherwise specified)
Symbol
Parameter
Value
Unit
V
CC
Supply Voltage
1)
7
V
V
out
Output Voltage - See note 1
-0.3 to V
cc
+ 0.3
V
I
out
Output Current
20
mA
Pd
Power Dissipation
2)
SO8
TSSOP8
700
625
mW
T
oper
Operating Free Air Temperature Range
-40 to +85
C
T
stg
Storage Temperature
-65 to +150
C
1. All voltages values, except differential voltage are with respect to network ground terminal.
2. T
j
= 150C, T
amb
= 25
o
C with Rthja = 175
o
C/W for SO8 package
Rthja = 200
o
C/W for TSSOP8 package
Symbol
Parameter
Value
Unit
V
CC
Supply Voltage
1.5 to 5.5
V
T
oper
Operating Free Air Temperature Range
-40 to +85
C
Symbol
Parameter
Min.
Typ.
Max.
Unit
V
thi
Threshold Voltage - V
CC
Increasing
T
amb
=
25C
-40C
T
amb
+85C
4.10
4.33
4.46
V
V
thd
Threshold Voltage - V
CC
Decreasing
T
amb
=
25C
-40C
T
amb
+85C
4.10
4.23
4.46
V
V
hys
Hysteresis Voltage
50
100
200
mV
I
CC
Current Consumption
V
CC
= 5V
12
A
V
OL1
Low Level Output Voltage
V
CC
= 4V, I
OL
= 8mA
(OUTPUT 1) -40C
T
amb
+85C
450
800
1000
mV
V
OL2
Low Level Output Voltage
V
CC
= 5V, I
OL
= 8mA
(OUTPUT 2) -40C
T
amb
+85C
450
800
1000
mV
I
OH1
Low Level Output Voltage
V
CC
= 5V
(OUTPUT 1) -40C
T
amb
+85C
2
40
1000
nA
I
OH2
Low Level Output Voltage
V
CC
= 4V
(OUTPUT 2) -40C
T
amb
+85C
2
40
1000
nA
tphl
Response Time High to Low
R
L
= 10k
, C
L
= 15pF, V
CC
= V
thd
-10mV
20
s
trst
Reset Pulse width (Timer enabled)
-40C
T
amb
+85C
125
300
500
ms
TS834
3/7
TIMING DIAGRAMS
All the timung diagrams are given with outputs loaded by 10 k
resistors to V
CC
Active Low Reset, Timer Enabled
Active Low Reset, Timer Disabled
Active High Reset, Timer Enabled
Active High Reset, Timer Disabled
Timer
Vcc+
Input
Vref
GND
Timer Control
RESET
OUTPUT
RESET
OUTPUT
Vcc
Vcc
Timer enable : timer control to Vcc
Timer disable : timer control to Gnd
TS834
4/7
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
TS834
5/7
Vol vs Isink
Schematic to Measure Vol vs Isink
Reset High After V
cc
Tansition (timer disabled)
Reset Low After V
cc
Tansition (timer disabled)
TS834
Reset =low
Vcc=4V
TS834
Reset=low
Vcc=5V
Isink
Vcc
Isink
Vcc
Vin
Gnd
Reset
Reset
Reset
Reset
Gnd
Vin
PDF 
ZIP