Datasheet SERIES Datasheet (SGS Thomson Microelectronics)

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

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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

TL7705

Figure1 : Reset ControllerforµP

TL7700A Series

4/7

DIM.

mm inch

MIN. TYP. MAX. MIN. TYP. MAX.

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° (typ.)

D (1) 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 (1) 3.8 4.0 0.15 0.157

L 0.4 1.27 0.016 0.050

M 0.6 0.024

S8°(max.)

(1) D andF donot includemoldflash or protrusions. Mold flash or

potrusions shall not exceed0.15mm (.006inch).

SO8

OUTLINE AND

MECHANICAL DATA

TL7700A Series

5/7

Minidip

DIM.

mm inch

MIN. TYP. MAX. MIN. TYP. MAX.

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 0.260

I 5.08 0.200
L 3.18 3.81 0.125 0.150
Z 1.52 0.060

OUTLINE AND

MECHANICAL DATA

TL7700A Series

6/7

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license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this
publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMi­croelectronics products are not authorized for use as critical components in life support devices or systems without express written
approval of STMicroelectronics.

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TL7700A Series

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