74HC257; 74HCT257
Quad 2-input multiplexer; 3-state
Rev. 7 — 2 February 2016
Product data sheet
1. General description
The 74HC257; 74HCT257 is a quad 2-input multiplexer with 3-state outputs. Inputs
include clamp diodes. This enables the use of current limiting resistors to interface inputs
to voltages in excess of VCC.
2. Features and benefits
Non-inverting data path
3-state outputs interface directly with system bus
Complies with JEDEC standard no. 7A
Input levels:
For 74HC257: CMOS level
For 74HCT257: TTL level
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
Description
Version
74HC257D 40 C to +125 C SO16
plastic small outline package; 16 leads; body width 3.9 mm SOT109-1
74HCT257D
74HC257DB 40 C to +125 C
74HCT257DB
SSOP16 plastic shrink small outline package; 16 leads;
body width 5.3 mm
SOT338-1
74HC257PW 40 C to +125 C
74HCT257PW
TSSOP16 plastic thin shrink small outline package; 16 leads;
body width 4.4 mm
SOT403-1
