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 SN54AS760, SN74ALS760, SN74AS760

 OCTAL BUFFERS AND LINE DRIVERS

 WITH OPEN-COLLECTOR OUTPUTS

 SDAS141A – DECEMBER 1983 – REVISED JANUARY 1995

Copyright 

©

 1995, Texas Instruments Incorporated

1

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

Open-Collector Outputs Drive Bus Lines or

Buffer Memory Address Registers

Eliminates the Need for 3-State Overlap

Protection

pnp Inputs Reduce dc Loading

Open-Collector Versions of 

ALS244 and

AS244

Package Options Include Plastic

Small-Outline (DW) Packages, Ceramic

Chip Carriers (FK), and Standard Plastic (N)

and Ceramic (J) 300-mil DIPs

 

description

These octal buffers and line drivers are designed

specifically to improve both the performance and

density of 3-state memory address drivers, clock

drivers, and bus-oriented receivers and

transmitters by eliminating the need for 3-state

overlap protection. With the 

AS756 and

SN74AS757, these devices provide the choice of

selected combinations of inverting outputs,

symmetrical active-low output-enable (OE)

inputs, and complementary OE and OE inputs.

The SN54AS760 is characterized for operation

over the full military temperature range of – 55

°

C

to 125

°

C. The SN74ALS760 and SN74AS760 are

characterized for operation from 0

°

C to 70

°

C.

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

1OE

1A1

2Y4

1A2

2Y3

1A3

2Y2

1A4

2Y1

GND

V

CC

2OE

1Y1

2A4

1Y2

2A3

1Y3

2A2

1Y4

2A1

SN54AS760 . . . J  PACKAGE

SN74ALS760, SN74AS760 . . . DW OR N PACKAGE

(TOP VIEW)

3

2

1 20 19

9 10 11 12 13

4

5

6

7

8

18

17

16

15

14

1Y1

2A4

1Y2

2A3

1Y3

1A2

2Y3

1A3

2Y2

1A4

 SN54AS760 . . . FK PACKAGE

(TOP VIEW)

2Y4

1A1

1OE

1Y4

2A2

2OE

2Y1

GND

2A1

V

CC

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.

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SN54AS760, SN74ALS760, SN74AS760

OCTAL BUFFERS AND LINE DRIVERS

WITH OPEN-COLLECTOR OUTPUTS

SDAS141A – DECEMBER 1983 – REVISED JANUARY 1995

2

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

logic symbol

logic diagram (positive logic)

1

2

4

6

8

19

11

13

15

17

3

5

7

9

12

14

16

18

1A1

1A2

1A3

1A4

1Y1

2A1

2A2

2A3

2A4

2Y1

1Y2

1Y3

1Y4

2Y2

2Y3

2Y4

2OE

1OE

2

1A1

4

1A2

6

1A3

8

1A4

EN

1

1Y1

18

1Y2

16

1Y3

14

1Y4

12

11

2A1

13

2A2

15

2A3

17

2A4

EN

19

2Y1

9

2Y2

7

2Y3

5

2Y4

3

1OE

2OE

† This symbol is in accordance with ANSI/IEEE Std 91-1984 and

IEC Publication 617-12.

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

Supply voltage, V

CC

 

 7 V

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

Input voltage, V

I

 

 7 V

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

Off-state output voltage 

 7 V

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

Operating free-air temperature range, T

A

: SN74ALS760  

0

°

C to 70

°

C

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

Storage temperature range 

 – 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.

recommended operating conditions

SN74ALS760

UNIT

MIN

NOM

MAX

UNIT

VCC

Supply voltage

4.5

5

5.5

V

VIH

High-level input voltage

2

V

VIL

Low-level input voltage

0.8

V

VOH

High-level output voltage

5.5

V

IOL

Low-level output current

24

mA

TA

Operating free-air temperature

0

70

°

C

background image

 SN54AS760, SN74ALS760, SN74AS760

OCTAL BUFFERS AND LINE DRIVERS

WITH OPEN-COLLECTOR OUTPUTS

 SDAS141A – DECEMBER 1983 – REVISED JANUARY 1995

3

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

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

otherwise noted)

PARAMETER

TEST CONDITIONS

SN74ALS760

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VIK

VCC = 4.5 V,

II = – 18 mA

– 1.5

V

IOH

VCC = 4.5 V,

VOH = 5.5 V

0.1

mA

IOL

VCC = 4 5 V

IOL = 12 mA

0.25

0.4

V

IOL

VCC = 4.5 V

IOL = 24 mA

0.35

0.5

V

II

VCC = 5.5 V,

VI = 7 V

0.1

mA

IIH

VCC = 5.5 V,

VI = 2.7 V

20

µ

A

IIL

VCC = 5.5 V,

VI = 0.4 V

– 0.1

mA

ICC

VCC = 5 5 V

Outputs high

9

15

mA

ICC

VCC = 5.5 V

Outputs low

15

19

mA

† All typical values are at VCC = 5 V, TA = 25

°

C.

switching characteristics (see Figure 1)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

VCC = 4.5 V to 5.5 V,

CL = 50 pF,

RL = 500 

,

TA = MIN to MAX‡

UNIT

(INPUT)

(OUTPUT)

SN74ALS760

MIN

MAX

tPLH

A

Y

5

15

ns

tPHL

A

Y

5

12

ns

tPLH

OE

Y

5

16

ns

tPHL

OE

Y

5

13

ns

‡ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.

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

§

Supply voltage, V

CC

 

 7 V

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

Input voltage, V

I

 

 7 V

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

Off-state output voltage 

 7 V

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

Operating free-air temperature range, T

A

: SN54AS760  

– 55

°

C to 125

°

C

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

SN74AS760  

0

°

C to 70

°

C

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

Storage temperature range 

 – 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.

background image

SN54AS760, SN74ALS760, SN74AS760

OCTAL BUFFERS AND LINE DRIVERS

WITH OPEN-COLLECTOR OUTPUTS

SDAS141A – DECEMBER 1983 – REVISED JANUARY 1995

4

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

recommended operating conditions

SN54AS760

SN74AS760

UNIT

MIN

NOM

MAX

MIN

NOM

MAX

UNIT

VCC

Supply voltage

4.5

5

5.5

4.5

5

5.5

V

VIH

High-level input voltage

2

2

V

VIL

Low-level input voltage

0.8

0.8

V

VOH

High-level output voltage

5.5

5.5

V

IOL

Low-level output current

48

64

mA

TA

Operating free-air temperature

– 55

125

0

70

°

C

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

otherwise noted)

PARAMETER

TEST CONDITIONS

SN54AS760

SN74AS760

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

MIN

TYP†

MAX

UNIT

VIK

VCC = 4.5 V,

II = – 18 mA

– 1.2

– 1.2

V

IOH

VCC = 4.5 V,

VOH = 5.5 V

0.1

0.1

mA

VOL

VCC = 4 5 V

IOL = 48 mA

0.55

V

VOL

VCC = 4.5 V

IOL = 64 mA

0.55

V

II

VCC = 5.5 V,

VI = 7 V

0.1

0.1

mA

IIH

VCC = 5.5 V,

VI = 2.7 V

20

20

µ

A

IIL

OE

VCC = 5 5 V

VI = 0 4 V

– 0.5

– 0.5

mA

IIL

A

VCC = 5.5 V,

VI = 0.4 V

– 1

– 1

mA

ICC

VCC = 5 5 V

Outputs high

20

32

20

32

mA

ICC

VCC = 5.5 V

Outputs low

60

94

60

94

mA

† All typical values are at VCC = 5 V, TA = 25

°

C.

switching characteristics (see Figure 1)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

VCC = 4.5 V to 5.5 V,

CL = 50 pF,

RL = 500 

,

TA = MIN to MAX‡

UNIT

(INPUT)

(OUTPUT)

SN54AS760

SN74AS760

MIN

MAX

MIN

MAX

tPLH

A

Y

3

19.5

3

18.5

ns

tPHL

A

Y

1

7

1

6

ns

tPLH

OE

Y

3

19.5

3

18.5

ns

tPHL

OE

Y

1

8

1

7

ns

‡ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.

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 SN54AS760, SN74ALS760, SN74AS760

OCTAL BUFFERS AND LINE DRIVERS

WITH OPEN-COLLECTOR OUTPUTS

 SDAS141A – DECEMBER 1983 – REVISED JANUARY 1995

5

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

PARAMETER MEASUREMENT INFORMATION

SERIES 54ALS/ 74ALS AND 54AS/ 74AS DEVICES

tPHZ

tPLZ

tPHL

tPLH

0.3 V

tPZL

tPZH

tPLH

tPHL

LOAD CIRCUIT

FOR 3-STATE OUTPUTS

From Output

Under Test

Test 

Point

R1

S1

CL

(see Note A)

7 V

1.3 V

1.3 V

1.3 V

3.5 V

3.5 V

0.3 V

0.3 V

th

tsu

VOLTAGE WAVEFORMS

SETUP AND HOLD TIMES

Timing

Input

Data

Input

1.3 V

1.3 V

3.5 V

3.5 V

0.3 V

0.3 V

High-Level

Pulse

Low-Level

Pulse

tw

VOLTAGE WAVEFORMS

PULSE DURATIONS

Input

Out-of-Phase

Output

(see Note C)

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

3.5 V

3.5 V

0.3 V

0.3 V

VOL

VOH

VOH

VOL

Output

Control

(low-level

enabling)

Waveform 1

S1 Closed

(see Note B)

Waveform 2

S1 Open

(see Note B)

[

0 V

VOH

VOL

[

3.5 V

In-Phase

Output

0.3 V

1.3 V

1.3 V

VOLTAGE WAVEFORMS

PROPAGATION DELAY TIMES

VOLTAGE WAVEFORMS

ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS

R2

VCC

RL

Test 

Point

From Output

Under Test

CL

(see Note A)

LOAD CIRCUIT

FOR OPEN-COLLECTOR OUTPUTS

LOAD CIRCUIT FOR 

BI-STATE

TOTEM-POLE OUTPUTS

From Output

Under Test

Test 

Point

CL

(see Note A)

RL

RL = R1 = R2

NOTES: A. CL includes probe and jig capacitance.

B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.

Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.

C. When measuring propagation delay items of 3-state outputs, switch S1 is open.

D. All input pulses have the following characteristics: PRR 

 1 MHz, tr = tf = 2 ns, duty cycle = 50%.

E. The outputs are measured one at a time with one transition per measurement.

Figure 1. Load Circuits and Voltage Waveforms

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Texas 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.

CERTAIN 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 APPLICATIONS IS UNDERSTOOD TO

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.

Copyright 

©

 1998, Texas Instruments Incorporated