74HC253; 74HCT253
Dual 4-input multiplexer; 3-state
Rev. 5 21 January 2015 Product data sheet
1. General description
The 74HC253; 74HCT253 are high-speed Si-gate CMOS devices and are pin compatible
with Low-power Schottky TTL (LSTTL).
The 74HC253; 74HCT253 provides a dual 4-input multiplexer with 3-state outputs which
selects 2 bits of data from up to four sources selected by common data select inputs (S0,
S1). The two 4-input multiplexer circuits have individual active LOW output enable inputs
(1OE, 2OE).
The 74HC253 and 74HCT253 are the logic implementation of a 2-pole, 4-position switch,
where the position of the switch is determined by the logic levels applied to S0 and S1.
The outputs are forced to a high-impedance OFF-state when nOE is HIGH.
The logic equations for the outputs are:
1Y = 1OE 1I0 S1 S0++1I1 S1 S0+1I2 S1 S0 1I3 S1 S0
2Y = 2OE 2I0 S1 S0++2I1 S1 S0+2I2 S1 S0 2I3 S1 S0
2. Features and benefits
Non-inverting data path
3-state outputs interface directly with system bus
Complies with JEDEC standard no. 7A
Common select inputs
Separate output enable inputs
Input levels:
For 74HC253: CMOS level
For 74HCT253: TTL level
ESD protection:
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
Multiple package options
Specified from 40 Cto+85 C and from 40 Cto+125 C74HC253; 74HCT253
NXP Semiconductors
Dual 4-input multiplexer; 3-state
3. Applications
Data selectors
Data multiplexers
4. Ordering information
Table 1. Ordering information
Type number Package
Temperature range Name Description Version
74HC253N 40 C to +125 C DIP16 plastic dual in-line package; 16 leads (300 mil) SOT38-4
74HCT253N
74HC253D 40 C to +125 C SO16 plastic small outline package; 16 leads; body width SOT109-1
3.9 mm
74HCT253D
74HC253DB 40 C to +125 C SSOP16 plastic shrink small outline package; 16 leads; SOT338-1
body width 5.3 mm
74HCT253DB
5. Functional diagram
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Fig 1. Logic symbol Fig 2. Functional diagram
74HC_HCT253 All information provided in this document is subject to legal disclaimers. NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet Rev. 5 21 January 2015 2 of 17
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