SGS Thomson Microelectronics TS834 Datasheet

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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

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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

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