Datasheet TL7759CPWR, TL7759CPWLE, TL7759CPS, TL7759CP, TL7759CDR Datasheet (Texas Instruments)

TL7759

SUPPLY-VOLTAGE SUPERVISORS

SLVS042D – JANUARY 1991 – REVISED JULY 1999

1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

D

Power-On Reset Generator

D

Automatic Reset Generation After Voltage
Drop

D

Precision Input Threshold
Voltage . . . 4.55 V ±120 mV

D

Low Standby Current ...20 µA

D

Reset Outputs Defined When V

CC

Exceeds 1 V

D

True and Complementary Reset Outputs

D

Wide Supply-Voltage Range ...1 V to 7 V

description

The TL7759 is a supply-voltage supervisor designed for use as a reset controller in microcomputer and
microprocessor systems. The supervisor monitors the supply voltage for undervoltage conditions. During power
up, when the supply voltage, VCC, attains a value approaching 1 V, the RESET and RESET outputs become
active (high and low, respectively) to prevent undefined operation. If the supply voltage drops below the input
threshold voltage level (V

IT–

), the reset outputs go to the reset active state until the supply voltage has returned

to its nominal value (see timing diagram).
The TL7759C is characterized for operation from 0°C to 70°C.

AVAILABLE OPTIONS

PACKAGED DEVICES

T

A

SMALL

OUTLINE

(D)

PLASTIC

DIP

(P)

SHRINK

SMALL

OUTLINE

(PW)

CHIP

FORM

(Y)

0°C to 70°C TL7759CD TL7759CP TL7759CPW TL7759Y

The D and PW packages are available taped and reeled. Add the suffix R to
the device type (e.g., TL7759CDR). Chip forms are tested at 25°C.

functional block diagram

GND

RESET

RESET

V

CC

–

+

5

7
8

4

Reference

Voltage

Copyright  1999, Texas Instruments Incorporated

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.

1
2
3
4

8
7
6
5

NC
NC
NC

GND

RESET
RESET
NC
V

CC

D, P, OR PW PACKAGE

(TOP VIEW)

NC – No internal connection

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.

TL7759
SUPPLY-VOLTAGE SUPERVISORS

SLVS042D – JANUARY 1991 – REVISED JULY 1999

2

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Off-state output voltage range: RESET voltage –0.3 V to 20 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RESET voltage –0.3 V to 20 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Low-level output current, I

OL

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

High-level output current, IOH (RESET) –10 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

PW package 149°C/W. . . . . . . . . . . . . . . . . . . . . . . . .

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 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),

θ

JA

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

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

θ

JA

. 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

CC

1 7 V

p

Transistor off RESET voltage

15

Output voltage, V

O

(see Note 4)

Transistor off RESET voltage 0

V

Low-level output current, I

OL

RESET

24 mA

High-level output current, I

OH

RESET –8 mA

Operating free-air temperature, T

A

TL7759C 0 70 °C

NOTE 4: RESET output must not be pulled down below GND potential.

electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)

TL7759C

PARAMETER

TEST CONDITIONS

MIN

TYP

‡

MAX

UNIT

V

OL

Low-level output voltage

RESET

IOL = 24 mA 0.4 0.8 V

V

OH

High-level output voltage RESET

V

CC

=

4.3 V

IOH = –8 mA VCC–1 V

Input threshold voltage

TA = 25°C 4.43 4.55 4.67

V

IT–

g

(negative-going VCC)

TA = 0°C to 70°C

4.4 4.7

V

p

TA = 25°C 0.8 1

V

res

§

Power-up reset voltage

R

L

= 2.2

kΩ

TA = 0°C to 70°C 1.2

V

p

TA = 25°C 40 50 60

V

hys

¶

Hysteresis at V

CC

input

TA = 0°C to 70°C 30 70

mV

I

OH

High-level output current

RESET

VOH = 15 V 1 µA

I

OL

Low-level output current RESET

V

CC

= 7 V,

See Figure 1

VOL = 0 V –1 µA

pp

VCC = 4.3 V 1400 2000

ICCSupply current

No load

VCC = 5.5 V 40

µ

A

‡

Typical values are at TA = 25°C.

§

This is the lowest voltage at which RESET

becomes active, VCC slew rate ≤ 5 V/µs.

¶

This is the difference between positive-going input threshold voltage, V

IT+

, and negative-going input threshold voltage, V

IT–

.

TL7759

SUPPLY-VOLTAGE SUPERVISORS

SLVS042D – JANUARY 1991 – REVISED JULY 1999

3

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

electrical characteristics, TA = 25°C (unless otherwise noted)

TL7759Y

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

V

OL

Low-level output voltage

RESET

VCC = 4.3 V, IOL = 24 mA 0.4 V

V

IT–

Input threshold voltage (negative-going VCC) 4.55 V

V

res

†

Power-up reset voltage RL = 2.2 kΩ 0.8 V

V

hys

‡

Hysteresis at VCC input 50 mV

I

CC

Supply current VCC = 4.3 V, No load 1400 µA

†

This is the lowest voltage at which RESET

becomes active, VCC slew rate ≤ 5 V/µs.

‡

This is the difference between positive-going input threshold voltage, V

IT+

, and negative-going input threshold voltage, V

IT–

.

timing diagram

VIT –

0

RESET

0

V

res

V

CC

V

IT+

Output Undefined

for VCC Less Than 1 V

Output Undefined

V

IT+

VIT–

V

res

switching characteristics at TA = 25°C (unless otherwise noted)

FROM TO

TL7759C

PARAMETER

(INPUT) (OUTPUT)

TEST CONDITIONS

MIN MAX

UNIT

t

PLH

Propagation delay time, low-to high-level output V

CC

RESET

See Figures 2 and 3

§

5 µs

t

PHL

Propagation delay time, high-to low-level output V

CC

RESET

See Figures 2 and 4 5 µs

t

r

Rise time

RESET See Figures 2 and 4

§

1 µs

t

f

Fall time

RESET

See Figures 2 and 4 1 µs

t

w(min)

Minimum pulse duration V

CC

RESET

See Figures 2 and 4 5 µs

§

VCC slew rate ≤ 5 V/µs

TL7759
SUPPLY-VOLTAGE SUPERVISORS

SLVS042D – JANUARY 1991 – REVISED JULY 1999

4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

PARAMETER MEASUREMENT INFORMATION

15 V

7 V

GND

V

CC

TL7759

RESET

RESET

A

_

+

A

Figure 1. Test Circuit for Output Leakage Current

10%

50%

90%

4.8 V

V

CC

(see Note A)

4.3 V

RESET

t

r

t

PHL

t

PLH

t

f

90%

50%

10%

NOTE A: VCC slew rate ≤ 5 V/µs.

Figure 2. Switching Diagram

GND

V

CC

TL7759

RESET

RL = 1 kΩ

CL = 100 pF

†

†

CL Includes jig and probe capacitance.

0.1 mF

Pulse

Generator

Figure 3. Test Circuit for RESET Output Switching Characteristics

CL = 100 pF

†

RL= 1k Ω

GND

V

CC

TL7759

RESET

†

CL Includes jig and probe capacitance.

0.1 mF

Pulse

Generator

Figure 4. T est Circuit for RESET Output Switching Characteristics

TL7759

SUPPLY-VOLTAGE SUPERVISORS

SLVS042D – JANUARY 1991 – REVISED JULY 1999

5

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

APPLICATION INFORMATION

GND

V

CC

TL7759

RESET

1 kΩ

7

8

5

4

System Reset

5 V

RESET

0.1 µF

Figure 5. Power-Supply System Reset Generation

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accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
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Copyright  1999, Texas Instruments Incorporated