SGS Thomson Microelectronics SERIES Datasheet

TL7700A Series

April 2000

SUPPLY VOLTAGE SUPERVISORS



.POWER-ONRESETGENERATOR

.AUTOMATIC RESET GENERATION AFTER

VOLTAGEDROP

.

WIDE SUPPLY VOLTAGE RANGE ... 3V TO
18V

.

PRECISIONVOLTAGESENSOR

.TEMPERATURE-COMPENSATED VOLTAGE

REFERENCE

.

TRUEANDCOMPLEMENTRESETOUTPUTS

.EXTERNALLYADJUSTABLEPULSE WIDTH

N

Minidip

DESCRIPTION

TheTL7700Aseriesaremonolithicintegratedcircuit
supplyvoltagesupervisorsspecificallydesi-gnedfor
use as reset controllers in microcomputerand mi­croprocessorsystems.During power-upthedevice
teststhesupplyvoltageandkeepsthe RESET and
RESEToutputsactive(high and low, respectively)
as long as the supply voltage has not reached its
nominalvoltage value.Taking RESIN low has the
sameeffect.Toensurethatthe microcomputersys­temhasreset,theTL7700Atheninitiatesaninternal
timedelaythatdelaysthereturnofthe resetoutputs
totheirinactivestates.Sincethetimedelayformost
microcomputersandmicroprocessorsisintheorder
of several machinecycles, the device internaltime
delayis determinedby an externaltimedelayisde­terminedbyan externalcapacitorconnectedtothe
C

T

input(pin3).

t

d

=1.3x 104xC

T

Where: CTisin farads(F) and tdinseconds (s).In
addition,when the supplyvoltagedrops below the
nominal value, the outputs will be active until the
supplyvoltagereturnstothe nominalvalue.An ex­ternalcapacitor(typically0.1µF)mustbeconnected
to the REF output(pin 1) to reducetheinfluenceof
fasttransientsin the supply voltage.

TheTL7700AIseries is characterizedforoperation
from– 25

o

Cto85oC ; theTL7700ACseriesischar-

acterizedfrom 0

o

Cto70oC.

D

SO8

ORDERINGNUMBERS

Temperature Range Minidip S08

0to70

o

C TL77XXACP TL77XXACD

-25to 85

o

C TL77XXAIP TL77XXAID

PIN CONNECTION (top view)

1/7

*

TL7702A R1 =0Ω, R2 = open; TL7705A R1= 7.8KΩ, R2 = 10kΩ;TL7709A R1 = 19.7KΩ,R2 = 10kΩ;
TL7712A R1 = 32.7kΩ, R2 = 10kΩ; TL7715AR1 = 43.4 KΩ, R2 = 10kΩ.

BLOCK DIAGRAM

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

S

Supply Voltage, VCC- (see note 1) 20 V

V

i

Input Voltage Range at RESIN -0.3 to 20 V

V

i

Input Voltage at SENSE : TL7702A (see note 2)

TL7705A

-0.3 to 6

-0.3 to 10

V

I

OH

High-level Output Current at RESET -30 mA

I

OL

Low-level Output Current at RESET 30 mA

T

amb

Operating Free-air Temperature Range :

TL77XXAI
TL77XXAC

-25 to 85
0to70

o

C

T

stg

Storage Temperature Range -65 to 150

o

C

Notes: 1. All voltagevaluesare withrespect to the networkground terminal

2. For the TL7700A, thevoltage appliedto the SENSEterminal must neverexceed V

s

.

THERMAL DATA

Symbol Parameter Value Unit

R

th j-amb

Thermal Resistance Junction-ambient Max. 120

o

C/W

RECOMMENDED OPERATING CONDITIONS

Symbol Parameter Min. Max. Unit

V

S

Supply Voltage 3.6 18 V

V

IH

High-level Input Voltage at RESIN 2 V

V

IL

Low-level Input Voltage at RESIN 0.6 V

V

i

Voltage at Sense Input TL7702A

TL7705A

0
0

See note 310V

I

OH

High-level Output Current at RESET -16 mA

I

OL

Low-level Output Current at RESET 16 mA

T

amb

Operating Free-air Temperature Range TL77-AI

TL77-AC

-25
0

85
70

o

C

Note : 3. Forproper operation of theTL7702A,thevoltage applied totheSENSEterminalshould not exceed Vs-1V or6V,whicheverisless.

TL7700A Series

2/7

ELECTRICAL CHARACTERISTICS these specificationsunless otherwisespecified, apply for :

T

amb

= –25 to 85oC (TLXXAI),T

amb

= 0 to 70oC (TL77XXAC)

Symbol Parameter Test Conditions (1) Min. Typ. Max. Unit

V

OH

High-level Output Voltage at RESET IOH= –16mA Vs-

1.5

V

V

OL

Low-Level Output Voltage at RESET IOL= 16mA 0.4 V

V

ref

Reference Voltage T

amb

=25oC 2.48 2.53 2.58 V

V

T

Threshold Voltage at SENSE Input TL7702A

TL7705A

Vs= 3.6V to 18V
T

amb

=25oC

2.48

4.5

2.53

4.55

2.58

4.6

V

V

T

Threshold Voltage at SENSE Inpu TL7702A

TL7705A

Vs= 3.6V to 18V 2.45

4.45

2.53

4.55

2.58

4.6

V

V

T+,VT–

Hysteresis (2) at SENSE Input TL7702A

TL7705A

Vs= 3.6V to 18V
T

amb

=25oC

10
15

mV

I

I

Input Current at RESIN Input Vi= 2.4V to V

S

Vi= 0.4V

20

-100

µ

A

I

I

Input Current at SENSE Input TL7702A V

ref<Vi<Vs

- 1.5V 0.5 2

µ

A

I

OH

High-level Output Current at RESET VO= 18V 50

µ

A

I

OL

Low-level Output Current at RESET VO=0V -50 µA

I

S

Supply Current All Inputs and out.

open

1.8 3.3 mA

Notes:

1. All characteristicsare measured withC = 0.1µF from Pin1 toGND, and withC = 0.1µF fromPin 3 to GND.

2. Hysteresis is thedifferencebetween thepositive going inputthreshold voltage. V

T+

,and thenegativegoing inputthreshold

voltage, V

T-

.

SWITCHING CHARACTERISTICS

Symbol Parameter Test Conditions Min. Typ. Max. Unit

t

pi

Pulse Width at SENSE Input Vih=V

ityp

+0.04 x V

i

ViL=V

ityp

–0.04 x V

i

0.9

µ

s

t

pi

Pulse Width at RESIN Input 0.4

µ

s

t

po

Pulse Width at Output CT= 0.1µF 0.65 1.3 2.6 ms

t

pdHL

Propagation Delay Time from RESIN
to RESET

CL= 100pF, Vs= 5V, RL= 4.7k

Ω

1

µ

s

t

r/f

Rise/Falltime at RESET and RESET CL= 10pF, Vs= 5V, RL= 4.7k

Ω

1

µ

s

TL7700A Series

3/7