SNx4HC257, SNx4HC258 Quadruple 2-Line to 1-Line Data Selectors/Multiplexers With

3-State Outputs

1 Features

• Wide operating voltage range of 2 V to 6 V

• High-current inverting outputs can drive up to 15

LSTTL loads

• Low power consumption, 80-µA max ICC

• 'HC257 typical tpd = 9 ns

• 'HC258 typical tpd = 12 ns

• ±6-mA output drive at 5 V

• Low input current of 1 µA max

• Provides bus interface from multiple sources in

high-performance systems

2 Description

The SNx4HC257 and '258 contain four data selectors/

multiplexers to select one of two data sources. All

channels are controlled by the same address select

(A/B) input, and active-low strobe (G) input. A high

level at the G terminal forces all outputs into the high-

impedance state. The '257 has non-inverted outputs

and the '258 has inverted outputs.

Device Information

PART NUMBER

PACKAGE

(1)

BODY SIZE (NOM)

SN74HC257D

SOIC (16)

9.90 mm × 3.90 mm

SN74HC257N

PDIP (16)

19.31 mm × 6.35 mm

SN74HC257NS

SO (16)

6.20 mm × 5.30 mm

SN74HC257PW

TSSOP (16)

5.00 mm × 4.40 mm

SN74HC258D

SOIC (16)

9.90 mm × 3.90 mm

SN74HC258N

PDIP (16)

19.31 mm × 6.35 mm

SN74HC258NS

SO (16)

6.20 mm × 5.30 mm

SN74HC258PW

TSSOP (16)

5.00 mm × 4.40 mm

SN54HC257J

CDIP (16)

24.38 mm × 6.92 mm

SNJ54HC257FK

LCCC (20)

8.89 mm × 8.45 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

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

SN74HC257 Functional Block Diagram

SN54HC257, SN54HC258, SN74HC257, SN74HC258

SCLS224C – DECEMBER 1982 – REVISED MARCH 2022

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.