Datasheet 5962-8868505PA, 5962-8868505HA, 5962-88685052A, 5962-8868504HA, 5962-88685042A Datasheet (Texas Instruments)

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Page 1

TL7702B, TL7705B

SUPPLY-VOLTAGE SUPERVISORS

SLVS037H – SEPTEMBER 1989 – REVISED JULY 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Power-On Reset Generator

Automatic Reset Generation After Voltage Drop

RESET Output Defined From VCC ≥ 1 V

Precision V oltage Sensor

T emperature-Compensated Voltage Reference

True and Complement Reset Outputs

Externally Adjustable Pulse Duration

description

The TL7702B and TL7705B are integrated-circuit supply-voltage supervisors designed for use as reset controllers in microcomputer and microprocessor systems. The supply-voltage supervisor monitors the supply for undervoltage conditions at the SENSE input. During power up, the RESET

output becomes active (low) when

attains a value approaching 1 V. As V

approaches 3 V (assuming that SENSE is above VT+), the delay timer function activates a time delay , after which outputs RESET and RESET go inactive (high and low, respectively). When an undervoltage condition occurs during normal operation, outputs RESET

and RESET go active. To ensure that a complete reset occurs, the reset outputs remain active for a time delay after the voltage at the SENSE input exceeds the positive-going threshold value. The time delay is determined by the value of the external capacitor C

: td ≈ 2.6 × 104 × CT, where CT is in farads (F)

and td is in seconds (s). An external capacitor (typically 0.1 µF) must be

connected to REF to reduce the influence of fast transients in the supply voltage.

The TL7702BC and TL7705BC are characterized for operation from 0°C to 70°C. The TL7702BI and TL7705BI are characterized for operation from –40°C to 85°C. The TL7705BQ is characterized for operation from –40°C to 125°C. The TL7705BM is characterized for operation from –55°C to 125°C.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

3212019

910111213

4 5 6 7 8

18 17 16 15 14

NC SENSE NC RESET NC

RESIN

TL7705BM ...FK PACKAGE

(TOP VIEW)

REF

RESET

GND

1 2 3 4

8 7 6 5

REF

RESIN

GND

SENSE RESET RESET

TL77xxBC ...D OR P PACKAGE

TL7705BM . . .JG PACKAGE

TL7705BQ ...D PACKAGE

(TOP VIEW)

1 2 3 4 5

9 8 7 6

REF

RESIN

GND

NC V

SENSE RESET RESET

TL7705BM ...U PACKAGE

(TOP VIEW)

•

NC – No internal connection

On products compliant to MIL-PRF-38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters.

Page 2

TL7702B, TL7705B SUPPLY-VOLTAGE SUPER VISORS

SLVS037H – SEPTEMBER 1989 – REVISED JULY 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

AVAILABLE OPTIONS

PACKAGED DEVICES

SMALL

OUTLINE

(D)

CHIP

CARRIER

(FK)

CERAMIC

DIP

(JG)

PLASTIC

DIP

(P)

CERAMIC

FLATPACK

(U)

CHIP FORM

(Y)

TL7702BCD — — TL7702BCP —

0°C to 70°C

TL7705BCD — — TL7705BCP —

TL7702BID — — TL7702BIP —

TL7702BY

–

40°C to 85°C

TL7705BID — — TL7705BIP —

TL7702BY,

TL7705BY

–40°C to 125°C TL7705BQD — — — —

— TL7702BMFK TL7702BMJG — TL7702BMU

–

55°C to 125°C

— TL7705BMFK TL7705BMJG — TL7705BMU

The D package is available taped and reeled. Add the suffix R to device type (e.g., TL7702BCDR). Chip forms are tested at 25°C.

Page 3

TL7702B, TL7705B

SUPPLY-VOLTAGE SUPER VISORS

SLVS037H – SEPTEMBER 1989 – REVISED JULY 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

functional block diagram

The functional block diagram is shown for illustrative purposes only; the actual circuit includes a trimming network to adjust the reference voltage and sense-comparator trip point.

RESIN

≈ 70 µA

R1 (see Note A)

R2 (see Note A)

Reference

Voltage

SENSE

GND

RESET

REF

Pin numbers shown are for the D, JG, and P packages. NOTE A: TL7702B: R1 = 0 Ω, R2 = open

TL7705B: R1 = 23 kΩ, R2 = 10 kΩ, nominal

typical timing diagram

IT–

RESET

res

VCC and

SENSE

IT–

IT+

res

Output Undefined

Output

Undefined

Page 4

TL7702B, TL7705B SUPPLY-VOLTAGE SUPER VISORS

SLVS037H – SEPTEMBER 1989 – REVISED JULY 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

†

Supply voltage, VCC (see Note 1) 20 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage range, VI: RESIN –0.3 V to 20 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SENSE –0.3 V to 20 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

High-level output current, I

(RESET) –30 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Low-level output current, IOL (RESET) 30 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Package thermal impedance, θJA (see Notes 2 and 3): D package 97°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . .

P package 127°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Case temperature for 60 seconds, T

: FK package 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: JG or U packages 300°C. . . . . . . . . . . . . .

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D or P packages 260°C. . . . . . . . . . . . . . . .

Storage temperature range, T

stg

–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

†

Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

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

2. Maximum power dissipation is a function of TJ(max),

, and TA. The maximum allowable power dissipation at any allowable

ambient temperature is PD = (TJ(max) – TA)/

. Operating at the absolute maximum TJ of 150°C can impact reliability.

3. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace length of zero.

recommended operating conditions

MIN MAX UNIT

Supply voltage, V

3.6 18 V

High-level input voltage, V

RESIN 2 18 V

Low-level input voltage, V

RESIN 0 0.8 V

Input voltage, V

SENSE 0 18 V

High-level output current, I

RESET –16 mA

Low-level output current, I

RESET 16 mA TL770xBC 0 70

TL770xBI –40 85

Operating free-air temperature range, T

TL7705BQ –40 125

°C

TL7705BM –55 125

Page 5

TL7702B, TL7705B

SUPPLY-VOLTAGE SUPER VISORS

SLVS037H – SEPTEMBER 1989 – REVISED JULY 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

electrical characteristics over recommended operating conditions (unless otherwise noted)

PARAMETER

TEST CONDITIONS

†

TL77xxBC

TL77xxBI

TL7705BQ

UNIT

MIN TYP MAX

High-level output voltage, RESET IOH = –16 mA VCC–1.5 V

Low-level output voltage, RESET IOL = 16 mA 0.4 V

ref

Reference voltage I

ref

= 500 µA, TA = 25°C 2.48 2.53 2.58 V

TL7702B

2.505 2.53 2.555

Negative-going

TL7705B

25°C

4.5 4.55 4.6

IT–

nput threshold voltage

at SENS

E input

TL7702B

2.48 2.53 2.58

at SENSE in ut

TL7705B

= full range

‡

4.45 4.55 4.65

Hysteresis, SENSE

TL7702B

hys

IT+

– V

IT–

)

TL7705B

= 3.6 V to 18 V,

25°C

res

Power-up reset voltage IOL at RESET = 2 mA, TA = 25°C 1 V

RESIN VI = 0.4 V to V

–10

IIInput current

SENSE TL7702B VI = V

ref

to 18 V –0.1 –2

High-level output current, RESET VO = 18 V, See Figure 1 50 µA

Low-level output current, RESET VO = 0 V, See Figure 1 –50 µA

SENSE

= 15 V, RESIN ≥ 2 V 1.8 3 mA

ICCSupply current

VCC = 18 V, TA = full range

‡

3.5 mA

†

All electrical characteristics are measured with 0.1-µF capacitors connected at REF, CT , and VCC to GND.

‡

Full range is 0°C to 70°C for the C-suffix devices, –40°C to 85°C for the I-suffix devices, and –40°C to 125°C for the Q-suffix device.

This is the lowest voltage at which RESET

becomes active.

switching characteristics, VCC = 5 V, CT open, TA = 25°C

PARAMETER

FROM

(INPUT)

(OUTPUT)

TEST CONDITIONS

TL77xxBC

TL77xxBI

TL7705BQ

UNIT

()

MIN TYP MAX

PLH

Propagation delay time from low- to high-level output

RESIN RESET

270 500 ns

PHL

Propagation delay time from high- to low-level output

RESIN RESET

See Figures 1, 2, and 3

270 500 ns

RESIN

150

twEffective pulse duration

SENSE

See Figure 2

100

Rise time

Fall time

RESET

150 200

Rise time

See Figures 1 and 3

75 150

Fall time

RESET

Page 6

TL7702B, TL7705B SUPPLY-VOLTAGE SUPER VISORS

SLVS037H – SEPTEMBER 1989 – REVISED JULY 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

electrical characteristics over recommended operating conditions (unless otherwise noted)

TL7705BM UNIT

PARAMETER

TEST CONDITIONS

†

MIN TYP MAX UNIT

High-level output voltage, RESET IOH = –16 mA VCC–1.5 V

Low-level output voltage, RESET IOL = 16 mA 0.4 V

ref

Reference voltage I

ref

= 500 µA, TA = 25°C 2.48 2.53 2.58 V

TL7702B

2.505 2.53 2.555

Negative-going

TL7705B

25°C

4.5 4.55 4.6

IT–

nput threshold voltage

at SENSE input

TL7702B

2.48 2.53 2.58

at SENSE in ut

TL7705B

= –

55°C

125°C

4.45 4.55 4.65

Hysteresis, SENSE

TL7702B

hys

IT+

– V

IT–

)

TL7705B

= 3.6 V to 18 V,

25°C

res

‡

Power-up reset voltage

IOL at RESET = 2 mA, TA = 25°C

1 V

RESIN VI = 0.4 V to V

–10

IIInput current

SENSE TL7702B VI = V

ref

to VCC – 1.5 V –0.1 –2

High-level output current, RESET VO = 18 V 50 µA

Low-level output current, RESET VO = 0 –50 µA

SENSE

= 15 V, RESIN ≥ 2 V

1.8 3

Supply current

VCC = 18 V,

TA = –55°C to 125°C

†

All electrical characteristics are measured with 0.1-µF capacitors connected at REF, CT , and VCC to GND.

‡

This is the lowest value at which RESET

becomes active.

switching characteristics, VCC = 5 V, CT open, TA = 25°C

FROM TO

TL7705BM

PARAMETER

(INPUT) (OUTPUT)

TEST CONDITIONS

MIN TYP MAX

UNIT

PLH

Propagation delay time from low- to high-level output

RESIN RESET

270 500* ns

PHL

Propagation delay time from high- to low-level output

RESIN RESET

See Figures 1, 2, and 3

270 500* ns

RESIN

150

twEffective pulse duration

SENSE

See Figure 2

100

Rise time

75*

Fall time

RESET

150 200*

Rise time

See Figures 1 and 3

75 150*

Fall time

RESET

50*

* On products compliant to MIL-PRF-38535, these parameters are not production tested.

Page 7

TL7702B, TL7705B

SUPPLY-VOLTAGE SUPER VISORS

SLVS037H – SEPTEMBER 1989 – REVISED JULY 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

electrical characteristics over recommended operating conditions, TA = 25°C (unless otherwise noted)

PARAMETER

TEST CONDITIONS

†

TL7702BY TL7705BY

UNIT

MIN TYP MAX

High-level output voltage, RESET IOH = –16 mA VCC–1.5 V

Low-level output voltage, RESET IOL = 16 mA 0.4 V

ref

Reference voltage I

ref

= 500 µA 2.48 2.53 2.58 V

Negative-going input threshold voltage

TL7702BY 2.505 2.53 2.555

IT–

ggg g

at SENSE input

TL7705BY

4.5 4.55 4.6

TL7702BY

hys

Hysteresis, SENSE (V

IT+

–

IT–

)

TL7705BY

= 3.6 V to 18

res

‡

Power-up reset voltage IOL at RESET = 2 mA 1 V

RESIN VI = 0.4 V to V

–10

IIInput current

SENSE TL7702BY VI = V

ref

to 18 V –0.1 –2

High-level output current, RESET VO = 18 V, See Figure 1 50 µA

Low-level output current, RESET VO = 0 V, See Figure 1 –50 µA

Supply current V

SENSE

= 15 V, RESIN ≥ 2 V 1.8 3 mA

†

All electrical characteristics are measured with 0.1-µF capacitors connected at REF, CT , and VCC to GND.

‡

This is the lowest voltage at which RESET

becomes active.

switching characteristics, VCC = 5 V, CT open, TA = 25°C

PARAMETER

FROM

TEST CONDITIONS

TL7702BY TL7705BY

UNIT

(INPUT)

(OUTPUT)

MIN TYP MAX

PLH

Propagation delay time from low- to high-level output

RESIN RESET

270 500 ns

PHL

Propagation delay time from high- to low-level output

RESIN RESET

See Figures 1, 2, and 3

270 500 ns

RESIN

150

twEffective pulse duration

SENSE

See Figure 2

100

Rise time

Fall time

RESET

150 200

Rise time

See Figures 1 and 3

75 150

Fall time

RESET

Page 8

TL7702B, TL7705B SUPPLY-VOLTAGE SUPER VISORS

SLVS037H – SEPTEMBER 1989 – REVISED JULY 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

PARAMETER MEASUREMENT INFORMATION

15 pF (see Note B)

RESET

DUT

GND

5 V

(see Note A)

RESET

OUTPUT CONFIGURATION

5 V

DUT

RESET

RESET OUTPUT CONFIGURATION

NOTES: A. For IOL and IOH, RL = 10 kΩ. For all switching characteristics, RL = 511 Ω.

B. This figure includes jig and probe capacitance.

(see Note A)

15 pF (see Note B)

Figure 1. RESET and RESET Output Configurations

5 V

2.5 V 0 V

RESIN

SENSE

VT + 2 V

WAVEFORMS

VT – 2 V

Figure 2. Input Pulse Definition

10%

IT+

IT–

IT+

0 V

2 V

0.8 V

PLH

50%

10%10%

90%

10%

SENSE

Undefined

RESET

Voltage

Fault

90%

RESIN

RESET

PHL

10%

90%

Figure 3. Voltage Waveforms

Page 9

TL7702B, TL7705B

SUPPLY-VOLTAGE SUPER VISORS

SLVS037H – SEPTEMBER 1989 – REVISED JULY 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

†

Figure 4

024 6810

t – Assertion Time – ns

ASSERTION TIME

LOAD RESISTANCE

RL – Load Resistance – kΩ

VCC = 5 V CT = 0.1 µF CL = 10 pF TA = 25°C

RESET t

Figure 5

400

200

100

024 6810

t – Deassertion Time – ns

600

700

DEASSERTION TIME

LOAD RESISTANCE

500

300

RL – Load Resistance – kΩ

VCC = 5 V CT = 0.1 µF CL = 10 pF TA = 25°C

RESET t

Figure 6

0 25 50 75 100 125

t – Assertion Time – ns

ASSERTION TIME

LOAD CAPACITANCE

150 175 200

VCC = 5 V CT = 0.1 µF RL = 4.7 kΩ TA = 25°C

RESET t

CL – Load Capacitance – pF

Figure 7

0.9

0.7

0.5

0.3 0 25 50 75 100 125

t – Deassertion Time –

1.1

1.3

DEASSERTION TIME

LOAD CAPACITANCE

150 175 200

1.7

1.5

1.9

2.1

VCC = 5 V CT = 0.1 µF RL = 4.7 kΩ TA = 25°C

RESET tf and RESET t

CL – Load Capacitance – pF

µs

†

For proper operation, both RESET and RESET should be terminated with resistors of similar value. Failure to do so may cause unwanted plateauing in either output waveform during switching.

Page 10

TL7702B, TL7705B SUPPLY-VOLTAGE SUPER VISORS

SLVS037H – SEPTEMBER 1989 – REVISED JULY 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

APPLICATION INFORMATION

10 kΩ

0.1 µF

SENSE RESIN

GND

REF

RESET

To System RESET

System Supply

Reset Input

(from system)

To System RESET

(see text)

7 2

10 kΩ

Figure 8. System Reset Controller With Undervoltage Sensing

When the TL770xB SENSE terminal is used to monitor VCC, a current-limiting resistor in series with CT is recommended. During normal operation, the timing capacitor is charged by the onboard current source to approximately V

or an internal voltage clamp (≈7.1-V zener), whichever is less. When the circuit is then subjected to an undervoltage condition during which VCC is rapidly slewed down, the voltage on CT exceeds that on VCC. This forward biases a secondary path internally , which falsely activates the outputs. A fault is indicated when VCC drops below V

(CT)

, not when V

SENSE

falls below VT–.

Texas Instruments performs a 100% electrical screen to verify that the outputs do not switch with 1 mA forced into the CT terminal. Adding the external resistor, RT, prevents false triggering. Its value is calculated as follows:

(CT)

Where:

(CT)

= VCC or 7.1 V, whichever is less

T–

= 4.55 V (nom)

= value of series resistor required

For V

= 5 V:

5*4.55

1mA

Therefore,

RTu

450

Using a 20% tolerance resistor, RT should be greater than 560 Ω. Adding this series resistor changes the duration of the reset pulse by no more than 10%. RT extends the discharge

of CT, but also skews the V

(CT)

threshold. These effects tend to cancel one another . The precise percentage change can be derived theoretically , but the equation is complicated by this interaction and is dependent upon the duration of the supply-voltage fault condition.

Both outputs of the TL770xB should be terminated with similar value resistors, even when only one is being used. This prevents unwanted plateauing in either output waveform during switching, which may be interpreted as an undefined state or delay system reset.

Page 11

IMPORTANT NOTICE

T exas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability.

TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements.

CERT AIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICA TIONS IS UNDERSTOOD T O BE FULLY AT THE CUSTOMER’S RISK.

In order to minimize risks associated with the customer’s applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards.

TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. TI’s publication of information regarding any third party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.

Datasheet 5962-8868505PA, 5962-8868505HA, 5962-88685052A, 5962-8868504HA, 5962-88685042A Datasheet (Texas Instruments)

Specifications and Main Features

Frequently Asked Questions

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