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74HC251D Datasheet Preview

74HC251D Datasheet

8-input multiplexer

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74HC251; 74HCT251
8-input multiplexer; 3-state
Rev. 5 — 15 July 2019
Product data sheet
1. General description
The 74HC251; 74HCT251 is an 8-bit multiplexer with eight binary inputs (I0 to I7), three select
inputs (S0 to S2) and an output enable input (OE). The select inputs select one of the eight binary
inputs and route it to the complementary outputs (Y and Y). A HIGH on OE causes the outputs to
assume a high-impedance OFF-state. Inputs include clamp diodes that enable the use of current
limiting resistors to interface inputs to voltages in excess of VCC.
2. Features and benefits
Input levels:
For 74HC251: CMOS level
For 74HCT251: TTL level
Low-power dissipation
Non-inverting data path
Specified in compliance with JEDEC standard no. 7A
ESD protection:
• • HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
Multiple package options
Specified from -40 °C to +85 °C and from -40 °C to +125 °C
3. Ordering information
Table 1. Ordering information
Type number
Package
Temperature range Name
74HC251D
-40 °C to +125 °C SO16
74HCT251D
74HC251DB
-40 °C to +125 °C SSOP16
74HCT251DB
74HC251PW
-40 °C to +125 °C TSSOP16
74HCT251PW
Description
plastic small outline package; 16 leads;
body width 3.9 mm
plastic shrink small outline package; 16 leads;
body width 5.3 mm
plastic thin shrink small outline package;
16 leads; body width 4.4 mm
Version
SOT109-1
SOT338-1
SOT403-1




nexperia

74HC251D Datasheet Preview

74HC251D Datasheet

8-input multiplexer

No Preview Available !

Nexperia
4. Functional diagram
4 3 2 1 15 14 13 12
I0 I1 I2 I3 I4 I5 I6 I7
7 OE
Y5
Y6
S0
S1
S2
11
10
Fig. 1. Logic symbol
I7
9
aaa-008235
I6
I5
I4
I3
I2
I1
I0
74HC251; 74HCT251
8-input multiplexer; 3-state
4 3 2 1 15 14 13 12
I0 I1 I2 I3 I4 I5 I6 I7
11
S0
10
S1
9
S2
7
OE
MULTIPLEXER
Y
5
Fig. 2. Functional diagram
Y
6 aaa-008236
Y
Y
Fig. 3. Logic diagram
S2
S1
S0
OE aaa-008237
74HC_HCT251
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 5 — 15 July 2019
© Nexperia B.V. 2019. All rights reserved
2 / 17


Part Number 74HC251D
Description 8-input multiplexer
Maker nexperia
PDF Download

74HC251D Datasheet PDF






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