SN54F240, SN74F240

OCTAL BUFFERS/DRIVERS

WITH 3-STATE OUTPUTS

SDFS061A – D2932, MARCH 1987 – REVISED OCTOBER 1993

2–2

POST OFFICE BOX 655303

logic diagram (positive logic)

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

and IEC Publication 617-12.

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

1OE

2OE

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

– 0.5 V to 7 V

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

– 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

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

Current into any output in the low state: SN54F240

96 mA

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

SN74F240

128 mA

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

Operating free-air temperature range:

SN54F240

– 55

°C to 125°C

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

SN74F240

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.