Multiplexers | MC74HC251A

8-Input Multiplexer (3-state)

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Overview

The MC54/74HC251 is identical in pinout to the LS251. The deviceinputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs.This device selects one of the eight binary Data Inputs, as determined by the Address Inputs. The Output Enable pin must be a low level for the selected data to appear at the outputs. If Output Enable is high, both the Y and the Y outputs are in the high impedance state. This 3 state feature allows the HC251 to be used in bus oriented systems. The HC251 is similar in function to the HC251 which does not have 3 state outputs.

  • Desktop
  • Output Drive Capability: 10 LSTTL Loads
  • Outputs Directly Interface to CMOS, NMOS, and TTL
  • Operating Voltage Range: 2 to 6 V
  • Low Input Current: 1 A
  • High Noise Immunity Characteristic of CMOS Devices
  • These are PbFree Devices

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MC74HC251ADG

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CAD Model

Pb

A

H

P

SOIC-16

751B-05

1

260

TUBE

48

No

1

2

6

48

null

$0.2048

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MC74HC251ADR2G

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Pb

A

H

P

SOIC-16

751B-05

1

260

REEL

2500

No

1

2

6

48

null

$0.1667

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MC74HC251ADTG

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Pb

A

H

P

TSSOP-16

948F-01

1

260

TUBE

96

No

1

2

6

48

null

$0.2852

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MC74HC251ADTR2G

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Pb

A

H

P

TSSOP-16

948F-01

1

260

REEL

2500

No

1

2

6

48

null

$0.1753

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NLV74HC251ADR2G

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Pb

A

H

P

SOIC-16

751B-05

1

260

REEL

2500

No

1

2

6

48

null

Price N/A

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Reliability Data

Die Related Summary Data

Device: MC74HC251ADG

Equivalent to wafer fab process: CMOS SUB

Product Technology

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Equivalent Device-Hours

MTBF/MTTF in Hours

FITS

CMOS SUB

3

7566029322

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Data is based on the following assumptions.

Note: The temperature and confidence level may be adjusted to your requirements.

Disclaimer: A reliability FIT rate calculated using this tool shall not be used for any functional safety purpose. In case a raw FIT rate needs to be estimated for a component which is targeted to be used in a safety critical application (i.e. compliant to ISO 26262 standard) it should be calculated according to generic safety standards (IEC62380, IEC61709, SN29500, FIDES, etc.)

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