TL7702A [STMICROELECTRONICS]

SUPPLY VOLTAGE SUPERVISORS; 电源电压监控器


型号：	TL7702A
厂家：	ST
描述：	SUPPLY VOLTAGE SUPERVISORS 电源电压监控器监控
文件：	总7页 (文件大小：69K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

TL7700 A Series

SUPPLY VOLTAGE SUPERVISORS

POWER-ON RESET GENERATOR

AUTOMATIC RESET GENERATION AFTER

VOLTAGEDROP

WIDE SUPPLY VOLTAGE RANGE ... 3V TO

18V

PRECISION VOLTAGE SENSOR

TEMPERATURE-COMPENSATED VOLTAGE

REFERENCE

TRUE AND COMPLEMENT RESET OUTPUTS

EXTERNALLY ADJUSTABLE PULSE WIDTH

Minidip

DESCRIPTION

TheTL7700Aseriesaremonolithicintegratedcircuit

supplyvoltagesupervisorsspecificallydesi-gnedfor

use as reset controllers in microcomputer and mi-

croprocessorsystems. During power-upthe device

tests the supply voltage and keeps the RESET and

RESET outputs active (high and low, respectively)

as long as the supply voltage has not reached its

nominal voltage value. Taking RESIN low has the

sameeffect.To ensurethatthe microcomputersys-

temhasreset, theTL7700Athen initiatesaninternal

timedelaythat delaysthereturnof the resetoutputs

to theirinactivestates.Since thetimedelay for most

microcomputersandmicroprocessorsis intheorder

of several machine cycles, the device internal time

delayis determinedby an externaltime delay is de-

termined by an externalcapacitorconnectedto the

C_Tinput (pin 3).

SO8

ORDERING NUMBERS

Temperature Range

0 to 70^oC

Minidip

TL77XXACP

TL77XXAIP

S08

TL77XXACD

TL77XXAID

-25 to 85^oC

PIN CONNECTION (top view)

t_d= 1.3 x 10⁴x C_T

Where : C_Tis in farads (F) and t_dinseconds (s). In

addition, when the supply voltage drops below the

nominal value, the outputs will be active until the

supply voltage returns to the nominal value. An ex-

ternalcapacitor(typically0.1µF)mustbeconnected

to the REF output (pin 1) to reduce the influence of

fast transientsin the supply voltage.

The TL7700AI series is characterized for operation

from – 25^oC to 85^oC ; theTL7700ACseries is char-

acterized from 0^oC to 70^oC.

1/7

August 1996

TL7700A Series

BLOCK DIAGRAM

TL7702A R1 = 0 , R2 = open ; TL7705A R1 = 7.8K , R2 = 10k ; TL7709A R1 = 19.7K , R2 = 10k ;

Ω

TL7712A R1 = 32.7k , R2 = 10k ; TL7715A R1 = 43.4K , R2 = 10k .

Ω

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

Supply Voltage, V_CC- (see note 1)

Value

Unit

V_S

V_i

Input Voltage Range at RESIN

Input Voltage at SENSE :

-0.3 to 20

V_i

TL7702A (see note 2)

TL7705A

-0.3 to 6

-0.3 to 10

-0.3 to 15

-0.3 to 20

TL7709A

TL7712A

TL7715A

I_OH

I_OL

High-level Output Current at RESET

Low-level Output Current at RESET

Operating Free-air Temperature Range :

-30

^oC

T_amb

TL77XXAI

TL77XXAC

-25 to 85

0 to 70

T_stg

Storage Temperature Range

-65 to 150

^oC

Notes : 1. All voltage values are with respect to the network ground terminal

2. For the TL7700A, the voltage applied to the SENSE terminal must never exceed V_s.

THERMAL DATA

Symbol

Parameter

Value

Unit

^oC/W

R_{th j-amb}Thermal Resistance Junction-ambient

Max.

120

RECOMMENDED OPERATING CONDITIONS

Symbol

V_S

Parameter

Min.

Max.

Unit

Supply Voltage

3.6

V_IH

High-level Input Voltage at RESIN

Low-level Input Voltage at RESIN

Voltage at Sense Input

V_IL

0.6

V_i

TL7702A

TL7705A

TL7709A

TL7712A

TL7715A

See note 3

I_OH

I_OL

High-level Output Current at RESET

Low-level Output Current at RESET

-16

^oC

T_amb

Operating Free-air Temperature Range TL77-AI

TL77-AC

-25

Note :

3. For proper operation of the TL7702A, the voltage applied to the SENSE terminal should not exceed V_s- 1V or 6V, which ever is less.

2/7

TL7700A Series

ELECTRICAL CHARACTERISTICS these specifications unless otherwise specified, apply for :

T_amb= –25 to 85^oC (TLXXAI), T_amb= 0 to 70^oC (TL77XXAC)

Symbol

Parameter

Test Conditions (1)

Min.

Typ. Max. Unit

V_OH

High-level Output Voltage at RESET

I_OH= –16mA

V_s-

1.5

V_OL

V_ref

V_T

Low-Level Output Voltage at RESET

Reference Voltage

I_OL= 16mA

T_amb= 25^oC

0.4

2.48

2.53 2.58

Threshold Voltage at SENSE Input

TL7702A

TL7705A

TL7709A

TL7712A

TL7715A

V_s= 3.6V to 18V

T_amb= 25^oC

2.48

4.5

2.53 2.58

4.55

7.6

10.8

4.6

7.7

7.5

10.6

13.2

13.5 13.8

V_T

Threshold Voltage at SENSE Inpu

TL7702A

TL7705A

TL7709A

TL7712A

TL7715At

V_s= 3.6V to 18V

2.45

4.45

7.4

10.4

2.53 2.58

4.55

7.6

4.6

7.7

10.8

13.5 13.8

V_T+, V_T–Hysteresis (2) at SENSE Input

TL7702A

TL7705A

TL7709A

TL7712A

TL7715A

V_s= 3.6V to 18V

T_amb= 25^oC

I_I

Input Current at RESIN Input

V_i= 2.4V to V_S

V_i= 0.4V

-100

I_I

Input Current at SENSE Input

High-level Output Current at RESET

Low-level Output Current at RESET

Supply Current

TL7702A

V_ref< V_i< V_s- 1.5V

V_O= 18V

0.5

I_OH

I_OL

I_S

µA

V_O= 0V

-50

1.8

All Inputs and out.

open

3.3

1. All characteristics are measured with C = 0.1 F from Pin 1 to GND, and with C = 0.1 F fromPin 3 to GND.

Notes :

2. Hysteresis is the difference between the positive going input threshold voltage. V_T+, and the negative going input threshold

voltage, V_T-.

SWITCHING CHARACTERISTICS

Symbol

Parameter

Test Conditions

Min. Typ. Max. Unit

t_pi

Pulse Width at SENSE Input

V_ih= V_ityp+0.04 x V_i

V_iL= V_ityp–0.04 x V_i

0.9

t_pi

t_po

Pulse Width at RESIN Input

Pulse Width at Output

0.4

C_T= 0.1µF

0.65

1.3

2.6

t_pdHL

Propagation Delay Time from RESIN

to RESET

C_L= 100pF, V = 5V, R = 4.7k

Ω

t_r/f

Rise/Falltime at RESET and RESET

C_L= 10pF, V_s= 5V, R_L= 4.7k

Ω

3/7

TL7700A Series

Figure 1 : Multiple Power SupplySystem Reset Generation

Figure 2 : Reset Controller for µP

4/7

TL7700A Series

SO8 PACKAGE MECHANICAL DATA

inch

DIM.

MIN.

TYP.

MAX.

1.75

0.25

1.65

0.85

0.48

0.25

0.5

MIN.

TYP.

MAX.

0.069

0.010

0.065

0.033

0.019

0.010

0.020

0.1

0.004

0.65

0.35

0.19

0.25

0.026

0.014

0.007

0.010

45 (typ.)

4.8

5.8

5.0

6.2

0.189

0.228

0.197

0.244

1.27

3.81

0.050

0.150

3.8

0.4

4.0

1.27

0.6

0.15

0.157

0.050

0.024

0.016

(max.)

5/7

TL7700A Series

MINIDIP PACKAGE MECHANICAL DATA

inch

TYP.

0.131

DIM.

MIN.

TYP.

MAX.

MIN.

MAX.

3.32

0.51

1.15

0.020

0.045

0.014

0.008

1.65

0.55

0.065

0.022

0.012

0.430

0.384

0.356

0.204

0.304

10.92

9.75

7.95

0.313

2.54

7.62

0.100

0.300

6.6

0.260

0.200

0.150

0.060

5.08

3.81

1.52

3.18

0.125

6/7

TL7700A Series

Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for

the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its

use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specification

mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously

supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems

without express written approval of SGS-THOMSON Microelectronics.

SGS-THOMSON Microelectronics GROUP OF COMPANIES

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7/7

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