Texas Instruments SN74LV157ANSR

Overview

SN74LV157ANSR from Texas Instruments is a quadruple 2-line to 1-line data selector/multiplexer operating from 2 V to 5.5 V, with 7.5 ns max propagation delay at 5 V, 5.5 V-tolerant inputs, and latch-up performance exceeding 100 mA per JESD 78 Class II - used in LED display data routing and I/O expansion circuits.

For engineers reviewing the SN74LV157ANSR datasheet, SN74LV157ANSR pinout, SN74LV157ANSR application, or SN74LV157ANSR equivalent, this page delivers verified functional mode behavior, SOP-16 package mapping, true-output logic architecture, and validated alternative options for multiplexer-based signal selection in industrial and telecom infrastructure designs.

Technical Context

The SN74LV157ANSR implements four independent 2:1 multiplexers with a common active-low strobe (G) and shared address select (A/B) input, enabling simultaneous 4-bit word selection from two sources. Each output presents true (non-inverted) data, with no internal inversion between inputs and outputs.

It supports mixed-voltage interfacing: inputs tolerate up to 5.5 V regardless of VCC (2–5.5 V), allowing connection to higher-voltage logic while powered from lower supplies. Output drive strength is specified at ±12 mA at 4.5–5.5 V, with guaranteed VOL ≤ 0.55 V and VOH ≥ 3.8 V under load.

Key Specifications

Pinout & Package

SOP-16 package (NS), body size 10.3 mm × 5.3 mm, 1.2 mm max height, gull-wing leads, RoHS-compliant NIPDAU finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 2:1 multiplexer applications.

Compared with SN74LVCH157A and 74LVC157PW, SN74LV157ANSR uniquely supports 2–5.5 V operation with 5.5 V-tolerant inputs - making it the only option among the three for mixed-voltage board-level integration without external level-shifting components.

Availability

SN74LV157ANSR is available at Aetrix Electronics and suitable for LED display control, telecom infrastructure backplanes, motor driver interfaces, I/O expansion modules, and network switch management requiring stable component supply across industrial temperature ranges.

Supply support for SN74LV157ANSR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions with broad industrial and automotive qualification.

The SN74LV157A product line delivers low-voltage, high-speed logic ICs optimized for reliable signal routing in mixed-supply systems - targeting industrial automation, communications equipment, and embedded control applications.

FAQ

What is the maximum propagation delay of the SN74LV157ANSR at 3.3 V?

The SN74LV157ANSR has a maximum propagation delay of 15.5 ns at VCC = 3.3 V ± 0.3 V with 15 pF load, measured from A/B or G input to Y output. This value is guaranteed across –40°C to +85°C and ensures deterministic timing in 3.3 V digital systems using the SN74LV157ANSR for data path selection.

Does the SN74LV157ANSR support 5 V logic inputs when powered from 3.3 V?

Yes, the SN74LV157ANSR accepts input voltages up to 5.5 V regardless of VCC level - meaning it can safely interface with 5 V signals while operating from a 3.3 V supply. This eliminates external level-shifting components and simplifies mixed-voltage board design using the SN74LV157ANSR.

What is the function of the G (strobe) pin on the SN74LV157ANSR?

The G pin is an active-low output enable/strobe: when G = HIGH, all four Y outputs enter high-impedance state; when G = LOW, outputs reflect the selected A/B input per channel. This allows bus-sharing and dynamic output disabling without affecting internal logic states in the SN74LV157ANSR.

Which package type does the SN74LV157ANSR use, and what are its key mechanical dimensions?

The SN74LV157ANSR uses a SOP-16 (NS) package with nominal body size 10.3 mm × 5.3 mm and maximum height of 2.00 mm. It features gull-wing leads, 1.27 mm pitch, and RoHS-compliant NIPDAU finish - fully compatible with standard SOP-16 footprints and reflow profiles per MSL Level-1.

How does the SN74LV157ANSR differ from the SN74LV157ADR in terms of packaging and application suitability?

The SN74LV157ANSR uses SOP-16 (NS) packaging (10.3 mm × 5.3 mm), while SN74LV157ADR uses SOIC-16 (D) (10.3 mm × 7.5 mm). Both share identical electrical specs and pinout, but the NS package offers narrower width - beneficial for space-constrained layouts where board real estate is limited for the SN74LV157ANSR.