Texas Instruments SNJ54LS352W

Overview

SNJ54LS352W from Texas Instruments is a dual 1-of-4 data selector/multiplexer with complementary outputs, operating at 5 V supply, featuring 15 ns propagation delay and TTL-compatible inputs, used in military-grade address decoding and signal routing applications.

For engineers reviewing the SNJ54LS352W datasheet, SNJ54LS352W pinout, SNJ54LS352W application, or SNJ54LS352W equivalent, key selection criteria include its dual-channel 1-of-4 select logic, complementary output pairs per channel, military temperature range (–55°C to +125°C), and hermetically sealed ceramic DIP-16 package compliance with MIL-STD-883.

Technical Context

The SNJ54LS352W implements two independent 1-of-4 multiplexers in a single package, each accepting two select inputs (S0, S1) and four data inputs (I0–I3), with true and complemented outputs (Y, W). It uses bipolar TTL technology with Schottky-clamped transistors for speed and noise immunity.

All inputs are TTL-compatible with guaranteed VIH ≥ 2.0 V and VIL ≤ 0.8 V. Output drive capability supports fan-out of 10 LS-TTL loads, and the device meets MIL-STD-883 Class B screening requirements for high-reliability aerospace and defense systems.

Key Specifications

Pinout & Package

Ceramic DIP-16 package with 0.3-inch body width, 0.1-inch lead pitch, and glass-sealed ceramic lid meeting MIL-STD-883 requirements for hermeticity and thermal cycling endurance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 1-of-4 multiplexer applications.

Compared with SN54LS153J and SNJ54LS153W, the SNJ54LS352W uniquely integrates complementary outputs per channel-reducing external logic in differential signaling paths-while maintaining full Class V space qualification and hermetic packaging.

Availability

SNJ54LS352W is available at Aetrix Electronics and suitable for avionics, radar subsystems, and secure crypto modules requiring stable component supply under extended temperature and radiation-hardened conditions.

Supply support for SNJ54LS352W 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 U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and high-reliability logic solutions.

The SNJ54LS352W belongs to TI's military-grade 54LS logic family, designed specifically for aerospace, defense, and space applications demanding extreme environmental resilience and long-term obsolescence mitigation.

FAQ

What is the maximum clock frequency supported by SNJ54LS352W in multiplexer mode?

The SNJ54LS352W does not operate as a clocked device but as a combinatorial multiplexer. Its 15 ns propagation delay allows reliable operation in synchronous systems with clock periods ≥30 ns (i.e., ≤33 MHz toggle rate). Timing margins must account for worst-case setup/hold at the select inputs, and no internal clock circuitry exists in SNJ54LS352W.

Does SNJ54LS352W support hot-swap or live-insertion?

No, SNJ54LS352W lacks hot-swap protection circuitry. Power sequencing per MIL-STD-883 requires VCC applied before any input signals, and removal must follow controlled shutdown. Applying inputs before VCC or during power transition risks latch-up or parametric shift in SNJ54LS352W.

Is SNJ54LS352W pin-compatible with SN74LS352N?

No. SN74LS352N is a commercial-grade plastic DIP-16 part with different DC characteristics and no military qualification. While both share identical pin assignments, SNJ54LS352W has tighter AC/DC specs, extended temperature range, and hermetic packaging-making it non-interchangeable without system-level validation of SNJ54LS352W performance margins.

What are the recommended PCB layout practices for SNJ54LS352W?

Use short, direct traces for select and data lines; place 0.1 µF ceramic decoupling capacitors within 5 mm of SNJ54LS352W pins 7 (GND) and 16 (VCC); avoid routing high-speed signals beneath the SNJ54LS352W body; and observe MIL-STD-275 spacing rules for high-reliability solder joints and thermal relief pads.

Can SNJ54LS352W be used with 3.3 V logic interfaces?

No. SNJ54LS352W requires a 5 V ±5% supply and TTL input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V). Driving its inputs from 3.3 V CMOS violates the minimum VIH specification and risks unreliable switching. Level-shifting circuitry is mandatory when interfacing with 3.3 V systems using SNJ54LS352W.