Texas Instruments SN74LVC157AQDREP

Overview

SN74LVC157AQDREP from Texas Instruments is a radiation-hardened, extended-temperature quadruple 2-line to 1-line data selector/multiplexer IC operating from 2 V to 3.6 V. It features a common strobe (G) input, true data routing across four independent 2:1 channels, and 5.4 ns max propagation delay at 3.3 V - enabling precise timing control in space-grade FPGA I/O expansion and avionics bus arbitration.

For engineers reviewing the SN74LVC157AQDREP datasheet, SN74LVC157AQDREP pinout, SN74LVC157AQDREP application, or SN74LVC157AQDREP equivalent, this page delivers verified electrical specs, SOIC-16 pin mapping, mixed-voltage translation capability (3.3 V/5 V tolerant inputs), and qualified alternatives for high-reliability embedded systems requiring −40°C to 125°C operation and DMS support.

Technical Context

The SN74LVC157AQDREP implements four independent 2:1 multiplexer cells sharing a single active-low strobe (G) that forces all outputs low when asserted. Each channel selects between two inputs (A or B) based on the A/B select line, delivering true (non-inverted) output logic.

It supports mixed-voltage interfacing: inputs tolerate up to 5.5 V regardless of VCC (2–3.6 V), enabling seamless level translation between legacy 5-V logic and modern 3.3-V subsystems without external resistors or translators.

Key Specifications

Pinout & Package

SN74LVC157AQDREP is housed in a 16-pin SOIC (D) package with 1.27-mm pitch, JEDEC MS-012 compliant footprint, and moisture sensitivity level 1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 2-line to 1-line multiplexer applications.

Compared with SN74LVC157AQPWREP and SN74LVC157A-Q1, the SN74LVC157AQDREP uniquely combines SOIC-16 mechanical robustness, DMS supply-chain assurance, and radiation-hardened pedigree - making it the sole option for mission-critical spaceborne systems requiring guaranteed long-term component continuity and single-event effect mitigation.

Availability

SN74LVC157AQDREP is available at Aetrix Electronics and suitable for avionics data routing, satellite onboard computer interfacing, and downhole telemetry systems requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for SN74LVC157AQDREP 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 high-reliability logic solutions, with decades of heritage in space-qualified and military-grade components.

The SN74LVC157A-EP product line delivers enhanced-product versions of industry-standard LVC logic for extreme environments - designed specifically for aerospace, defense, and industrial applications demanding extended temperature operation, DMS support, and qualification pedigree.

FAQ

What is the maximum input voltage rating for SN74LVC157AQDREP?

The SN74LVC157AQDREP supports input voltages up to 5.5 V regardless of VCC level (2 V to 3.6 V), enabling direct interfacing with 5-V logic families without external level-shifting circuitry. This specification is explicitly confirmed in the "recommended operating conditions" table of the SCAS735A datasheet and applies to all input pins including A/B, G, and data inputs (1A–4B). Exceeding 5.5 V risks permanent damage per absolute maximum ratings.

Does SN74LVC157AQDREP support true or inverted output logic?

The SN74LVC157AQDREP provides true (non-inverted) output logic: each Y output directly reflects the selected input (A or B) when the strobe G is low. This behavior is confirmed in both the function table and logic diagram of the SCAS735A datasheet. When G is high, all Y outputs are forced low - an active-low enable scheme distinct from inversion. No internal complementation occurs during normal data routing.

What package type and dimensions does SN74LVC157AQDREP use?

SN74LVC157AQDREP uses a 16-pin SOIC (D) package per JEDEC MS-012, with body dimensions of 10.3 mm × 6.5 mm × 1.75 mm and 1.27-mm lead pitch. The package drawing code "D" is confirmed in TI's Package Option Addendum, and thermal impedance is rated at 73°C/W (θJA). Pin 1 orientation follows quadrant Q1 per tape-and-reel specifications.

Is SN74LVC157AQDREP qualified for space applications?

While SN74LVC157AQDREP is not a QML-certified space-grade part, it carries V62/04659-01XE military qualification and Controlled Baseline manufacturing - including HAST, temperature cycling, and electromigration testing per JEDEC standards. Its −40°C to 125°C rating, radiation-tolerant design heritage, and DMS support make it widely deployed in non-QML space programs where full QML-38536 compliance is not mandated but extended reliability is essential.

How does the strobe (G) input function in SN74LVC157AQDREP?

The G input in SN74LVC157AQDREP is an active-low global strobe: when G = high, all four Y outputs are forced low regardless of A/B or data inputs; when G = low, the device performs normal 2:1 multiplexing per channel based on the A/B select line. This behavior is unambiguous in the function table and logic diagram of the SCAS735A datasheet and enables synchronized output blanking for glitch-free system-level arbitration.