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Texas Instruments SN74LS257BN — Interface & Transceivers

SN74LS257BN Texas Instruments 74LS 4x2:1 Multiplexer, 16-DIP

MPNSN74LS257BN
End of Life

Texas Instruments 74LS series multiplexer, SN74LS257BN, 4 x 2:1 circuit, single 4.75-5.25V supply, 0°C to 70°C, 16-DIP (0.300", 7.62mm) through-hole package, tube.

$1.05Ref. price · indicative, final on quote
Texas Instruments SN74LS257BN datasheet (PDF)
Packaging16-DIP (0.300", 7.62mm)
RoHSROHS3 Compliant
Series74LS
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SN74LS257BN specifications
ParameterValue
TypeMultiplexer
Series74LS
MountingThrough Hole
Supply voltage4.75V ~ 5.25V
Voltage supply sourceSingle Supply
Current - output high, low2.6mA, 24mA
Operating temperature0°C ~ 70°C
Circuit4 x 2:1
PackageTube
Case16-DIP (0.300\", 7.62mm)
Independent circuits1

Product details

Active 74LS multiplexer for 5V bus selection

The SN74LS257BN is an active-production 74LS-series multiplexer from Texas Instruments, configured as four independent 2:1 selector circuits in a single 16-pin DIP package.

Output drive and temperature envelope

Each output can source 2.6 mA and sink 24 mA — the asymmetric drive is typical of 74LS outputs, designed to drive one standard TTL load in the high state and up to ten loads in the low state. Housed in a 16-DIP (0.300", 7.62mm) through-hole package, the SN74LS257BN is suited for prototyping, rework, and boards where surface-mount is not an option. The 16-PDIP footprint matches standard 0.100-inch pitch DIP sockets.

Frequently asked questions

What is the SN74LS257BN used for?

It is a 4 x 2:1 multiplexer from the 74LS low-power Schottky family. It selects one of two 4-bit data sources onto a common output bus, controlled by a single select line — used in data routing, register selection, and address muxing in 5V logic systems.

What compliance documentation does Texas Instruments provide for SN74LS257BN?

The part is ROHS3 compliant. Standard TI documentation includes the datasheet, RoHS certificate, and REACH declaration — all available via the manufacturer's product page.