SN54F251B, SN74F251B

1-OF-8 DATA SELECTORS/MULTIPLEXERS

WITH 3-STATE OUTPUTS

SDFS066A – MARCH 1987 – REVISED OCTOBER 1993

2–3

POST OFFICE BOX 655303

logic diagram (positive logic)

Data

Select

(Binary)

Data

Inputs

D0

D1

D2

D3

D4

D5

D6

D7

G

W

Y

C

A

B

7

4

3

2

1

15

14

13

12

11

10

9

5

6

Pin numbers shown are for the D, J, and N packages.

– 0.5 V to 7 V

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Input voltage range (see Note 1)

– 1.2 V to 7 V

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Input current range

– 30 mA to 5 mA

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

– 0.5 V to 5.5 V

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Voltage range applied to any output in the high state

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Current into any output in the low state: SN54F251B

40 mA

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SN74F251B

48 mA

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Operating free-air temperature range:

SN54F251B

– 55

°C to 125°C

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SN74F251B

0

°C to 70°C

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Storage temperature range

– 65

°C to 150°C

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† 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.