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 SN74F125

 QUADRUPLE BUS BUFFER GATE

 WITH 3-STATE OUTPUTS

 SDFS016A – D3211, JANUARY 1989 – REVISED OCTOBER 1993

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

Copyright 

©

 1993, Texas Instruments Incorporated

2–1

3-State Outputs Drive Bus Lines or Buffer

Memory Address Registers

Package Options Include Plastic

Small-Outline Packages and Standard

Plastic 300-mil DIPs

 

description

The SN74F125 features independent line drivers

with 3-state outputs. Each output is disabled when

the associated output enable (OE) input is high.

The SN74F125 is characterized for operation from

0

°

C to 70

°

C.

FUNCTION TABLE

(each buffer)

INPUTS

OUTPUT

OE

A

Y

L

H

H

L

L

L

H

X

Z

logic symbol

logic diagram (positive logic)

EN

1

1OE

2

1A

1Y

3

4

5

2A

10

9

3A

13

12

4A

2Y

6

3Y

8

4Y

11

2OE

3OE

4OE

1

4

5

6

2A

2Y

2OE

1

2

3

1A

1Y

1OE

10

9

8

3A

3Y

3OE

13

12

11

4A

4Y

4OE

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

IEC Publication 617-12.

D OR N PACKAGE

(TOP VIEW)

1

2

3

4

5

6

7

14

13

12

11

10

9

8

1OE

1A

1Y

2OE

2A

2Y

GND

V

CC

4OE

4A

4Y

3OE

3A

3Y

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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SN74F125

QUADRUPLE BUS BUFFER GATE

WITH 3-STATE OUTPUTS

SDFS016A – D3211, JANUARY 1989 – REVISED OCTOBER 1993

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

2–2

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

Supply voltage range, V

CC

 

 – 0.5 V to 7 V

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

Input voltage range, V

I

 (see Note 1) 

 – 1.2 V to 7 V

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

Input current range 

 – 30 mA to 5 mA

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

Voltage range applied to any output in the disabled or power-off state 

 – 0.5 V to 5.5 V

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

Voltage range applied to any output in the high state 

 – 0.5 V to V

CC

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

Current into any output in the low state 

 128 mA

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

Operating free-air temperature range 

 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.

NOTE 1: The input voltage ratings may be exceeded provided the input current ratings are observed.

recommended operating conditions

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

IIK

Input clamp current

– 18

mA

IOH

High-level output current

– 15

mA

IOL

Low-level output current

64

mA

TA

Operating free-air temperature

0

70

°

C

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

otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP‡

MAX

UNIT

VIK

VCC = 4.5 V,

II = – 18 mA

– 1.2

V

VCC = 4 5 V

IOH = – 3 mA

2.4

3.3

VOH

VCC = 4.5 V

IOH = – 15 mA

2

3.1

V

VCC = 4.75 V,

IOH = – 3 mA

2.7

VOL

VCC = 4.5 V,

IOL = 64 mA

0.4

0.55

V

II

VCC = 0,

VI = 7 V

0.1

mA

IIH

VCC = 5.5 V,

VI = 2.7 V

20

µ

A

IIL

VCC = 5.5 V,

VI = 0.5 V

– 20

µ

A

IOZH

VCC = 5.5 V,

VO = 2.7 V

50

µ

A

IOZL

VCC = 5.5 V,

VO = 0.5 V

– 50

µ

A

IOS§

VCC = 5.5 V,

VO = 0

– 100

– 225

mA

ICCH

VCC = 5.5 V,

Outputs open

17

24

mA

ICCL

VCC = 5.5 V,

Outputs open

28

40

mA

ICCZ

VCC = 5.5 V,

Outputs open

25

35

mA

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

°

C.

§ Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second.

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 SN74F125

 QUADRUPLE BUS BUFFER GATE

 WITH 3-STATE OUTPUTS

 SDFS016A – D3211, JANUARY 1989 – REVISED OCTOBER 1993

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

2–3

switching characteristics (see Note 2)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

VCC = 5 V,

CL = 50 pF,

RL = 500 

,

TA = 25

°

C

VCC = 4.5 V to 5.5 V,

CL = 50 pF,

RL = 500 

,

TA = MIN to MAX†

UNIT

MIN

TYP

MAX

MIN

MAX

tPLH

A

Y

1.2

3.6

6

1.2

6.5

ns

tPHL

A

Y

2.2

5.1

7.5

2.2

8

ns

tPZH

OE

Y

2.7

5.1

7.5

2.7

8.5

ns

tPZL

OE

Y

3.2

5.6

8

3.2

9

ns

tPHZ

OE

Y

1

3.1

5

1

6

ns

tPLZ

OE

Y

1

3.1

5.5

1

6

ns

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

NOTE 2: Load circuits and waveforms are shown in Section 1.

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SN74F125

QUADRUPLE BUS BUFFER GATE

WITH 3-STATE OUTPUTS

SDFS016A – D3211, JANUARY 1989 – REVISED OCTOBER 1993

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

2–4

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Copyright 

©

 1998, Texas Instruments Incorporated