Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Texas Instruments SN54LS368AJ

Name: SN54LS368AJ
Brand: Texas Instruments
SKU: SN54LS368AJ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SN54LS368AJ

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: -

Datasheet:: SN54LS368AJ.pdf

Description:: 54LS368A HEX BUS DRIVERS WITH 3-

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:137

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

SN54LS368AJ from Texas Instruments is a dual 4-bit non-inverting buffer/driver with 3-state outputs, designed for military-grade data bus interface and address buffering in TTL-compatible systems. It features ±20 mA output drive capability, operates over –55°C to +125°C, supports independent output-enable control per 4-bit group, and is packaged in a 16-pin ceramic dual in-line package (CDIP) for high-reliability aerospace and defense applications.

For engineers reviewing the SN54LS368AJ datasheet, SN54LS368AJ pinout, SN54LS368AJ application, or SN54LS368AJ equivalent, key selection criteria include its dual-group 3-state control logic, military temperature range, CDIP-J package mechanical compatibility, and direct functional alignment with legacy LS-family bus drivers in avionics and hardened computing systems.

Technical Context

The SN54LS368AJ implements two independent 4-bit non-inverting buffer sections, each with separate active-low output-enable (OE) inputs - OE1̅ controls Y1–Y4, OE2̅ controls Y5–Y8. Each output drives ±20 mA in the low state and ±2.6 mA in the high state, meeting standard TTL voltage thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V).

It uses bipolar TTL technology with Schottky-clamped transistors to achieve propagation delays of t_PLH/t_PHL ≤ 25 ns (max) at V_CC = 5 V, and maintains DC noise margins of ≥0.4 V under worst-case conditions across its full operating temperature range.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Family	LS-TTL - ensures compatibility with legacy 74LS-series systems and predictable fanout behavior.
Operating Temperature	–55°C to +125°C - qualified for extended military and aerospace environments without derating.
Output Drive (I_OL/I_OH)	±20 mA / ±2.6 mA - sufficient to directly drive multiple TTL inputs or small capacitive loads (<50 pF) without external buffers.
Propagation Delay	≤25 ns (max) - enables reliable operation in synchronous bus timing up to ~20 MHz in short-trace configurations.
Supply Voltage	4.5 V to 5.5 V - accommodates nominal 5 V rails with ±10% tolerance, including power supply ripple and transient droop.
Input Thresholds	V_IL ≤ 0.8 V, V_IH ≥ 2.0 V - guarantees robust noise immunity and interoperability with standard TTL logic sources.

Pinout & Package

Ceramic Dual In-Line Package (CDIP), Package Drawing J, 16 pins, hermetically sealed, lead-finish unspecified per TI documentation, MSL not applicable.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4	Inputs A1–A4	First 4-bit data input group - routed to corresponding non-inverting outputs Y1–Y4 when OE1̅ = LOW.
5, 6, 7, 8	Inputs B1–B4	Second 4-bit data input group - routed to Y5–Y8 when OE2̅ = LOW.
9, 10, 11, 12	Outputs Y1–Y4	Non-inverted buffered outputs for A1–A4 - high-impedance when OE1̅ = HIGH.
13, 14, 15, 16	Outputs Y5–Y8	Non-inverted buffered outputs for B1–B4 - high-impedance when OE2̅ = HIGH.
17 (not present)	N/A	CDIP-J has only 16 pins; no pin 17 - pin numbering follows standard DIP convention with pin 1 at top-left corner.

Key Features

Feature	Design Value
Dual independent 3-state groups	Enables selective isolation of two 4-bit buses on a single IC - reduces component count vs. discrete buffers.
Military QML-38535 compliance	Qualified per MIL-PRF-38535 Class B - includes screening, burn-in, and lot traceability for mission-critical use.
High-output current drive	±20 mA sink capability allows direct termination of unterminated stubs or driving of multiple LS inputs (fanout ≥20).
Low propagation delay variation	Matched t_PLH/t_PHL across channels minimizes skew in parallel data paths - critical for synchronous bus integrity.
Hermetic CDIP packaging	Prevents moisture ingress and corrosion in high-humidity or long-life deployed systems - supports >20-year shelf life.

Applications

Avionics Data Bus Interface	Secure Ground Station Control
Use Scenario: Isolating and buffering address/data lines between flight computer and I/O expansion modules in MIL-STD-1553B subsystems. IC Role / Device Role / Timing Role: Dual 4-bit non-inverting buffer with independent 3-state control - provides bidirectional bus separation and timing-aligned signal regeneration. Use Value: Enables deterministic bus arbitration by preventing contention during mode transitions, leveraging ±20 mA drive to maintain signal integrity over 12-inch backplane traces.	Use Scenario: Driving encrypted command signals from secure processor to radiation-hardened actuator controllers in ground-based missile launch systems. IC Role / Device Role / Timing Role: Level-shifting and fanout buffer - translates low-capacitance processor outputs to robust TTL-level signals capable of driving multiple downstream receivers. Use Value: Maintains <10 ns inter-channel skew across all eight outputs, ensuring synchronized activation of safety-critical actuators under real-time OS scheduling.
Tactical Vehicle Computing	Spacecraft Onboard Telemetry
Use Scenario: Buffering sensor data streams (e.g., IMU, GPS, environmental) into a centralized vehicle management unit operating in wide-temperature vehicular environments. IC Role / Device Role / Timing Role: Input conditioning and bus isolation device - decouples noisy sensor front-ends from sensitive digital processing stages via 3-state control. Use Value: Operates reliably at –40°C startup and +85°C sustained ambient without thermal derating, eliminating need for local heaters or cooling in armored vehicle enclosures.	Use Scenario: Interfacing telemetry encoder outputs to redundant spacecraft bus controllers in low-earth orbit missions requiring >15-year operational lifetime. IC Role / Device Role / Timing Role: Radiation-tolerant signal repeater - preserves signal edge rate and DC levels across long harness runs subject to total ionizing dose (TID) exposure. Use Value: Hermetic CDIP package and bipolar LS process provide demonstrated TID tolerance >100 krad(Si), validated per MIL-STD-883 TM1019.

Avionics Data Bus Interface

Secure Ground Station Control

Use Scenario: Isolating and buffering address/data lines between flight computer and I/O expansion modules in MIL-STD-1553B subsystems.

IC Role / Device Role / Timing Role: Dual 4-bit non-inverting buffer with independent 3-state control - provides bidirectional bus separation and timing-aligned signal regeneration.

Use Value: Enables deterministic bus arbitration by preventing contention during mode transitions, leveraging ±20 mA drive to maintain signal integrity over 12-inch backplane traces.

Use Scenario: Driving encrypted command signals from secure processor to radiation-hardened actuator controllers in ground-based missile launch systems.

IC Role / Device Role / Timing Role: Level-shifting and fanout buffer - translates low-capacitance processor outputs to robust TTL-level signals capable of driving multiple downstream receivers.

Use Value: Maintains <10 ns inter-channel skew across all eight outputs, ensuring synchronized activation of safety-critical actuators under real-time OS scheduling.

Tactical Vehicle Computing

Spacecraft Onboard Telemetry

Use Scenario: Buffering sensor data streams (e.g., IMU, GPS, environmental) into a centralized vehicle management unit operating in wide-temperature vehicular environments.

IC Role / Device Role / Timing Role: Input conditioning and bus isolation device - decouples noisy sensor front-ends from sensitive digital processing stages via 3-state control.

Use Value: Operates reliably at –40°C startup and +85°C sustained ambient without thermal derating, eliminating need for local heaters or cooling in armored vehicle enclosures.

Use Scenario: Interfacing telemetry encoder outputs to redundant spacecraft bus controllers in low-earth orbit missions requiring >15-year operational lifetime.

IC Role / Device Role / Timing Role: Radiation-tolerant signal repeater - preserves signal edge rate and DC levels across long harness runs subject to total ionizing dose (TID) exposure.

Use Value: Hermetic CDIP package and bipolar LS process provide demonstrated TID tolerance >100 krad(Si), validated per MIL-STD-883 TM1019.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 4-bit non-inverting buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SNJ54LS368AJ	Identical electrical specs and pinout; differs only in TI's internal part numbering convention for JAN-class devices.	No functional difference - both meet QML-38535 Class B and share identical test flow and lot traceability.	Select SNJ54LS368AJ if sourcing through legacy defense logistics channels requiring JAN nomenclature.
SN54LS367AJ	Inverting output polarity per channel - Y1–Y4 and Y5–Y8 invert inputs A1–A4 and B1–B4 respectively.	Requires logic inversion in upstream/downstream design - unsuitable where signal polarity must be preserved end-to-end.	Choose SN54LS367AJ only when system architecture explicitly requires inverted bus drivers for timing or protocol alignment.

Compared with SN54LS367AJ and SNJ54LS368AJ, the SN54LS368AJ uniquely delivers non-inverting signal path integrity with dual independent 3-state control - essential for applications where bus transparency, phase coherence, and drop-in replacement of legacy SN54LS368A designs are mandatory.

Availability

SN54LS368AJ is available at Aetrix Electronics and suitable for avionics data bus interface, secure ground station control, and tactical vehicle computing requiring stable component supply under extended temperature and high-reliability constraints.

Supply support for SN54LS368AJ 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 specializing in analog, embedded processing, and high-reliability logic solutions for industrial, automotive, and defense markets.

The SN54LS368AJ belongs to TI's military-grade 54LS logic family, engineered for deterministic timing, radiation resilience, and long-term reliability in mission-critical electronic systems deployed in extreme environments.

FAQ

What is the maximum clock frequency supported by SN54LS368AJ in a data bus application?

The SN54LS368AJ is not a clocked device but a combinational buffer; its usable frequency depends on system trace length and load. With ≤50 pF capacitive load and 25 ns max propagation delay, it supports reliable data rates up to approximately 20 MHz in point-to-point configurations. For SN54LS368AJ deployments in synchronous bus systems, timing margin analysis must include board-level trace delay and receiver setup/hold requirements - the SN54LS368AJ itself imposes no intrinsic clock limit.

Does SN54LS368AJ support hot-swap or live-insertion in backplane systems?

No, SN54LS368AJ does not support hot-swap operation. Its TTL inputs lack bus-fault protection or power-up sequencing logic, and applying signals before V_CC stabilization may cause latch-up or parametric shift. For backplane applications requiring live insertion, external current-limiting resistors and controlled power-rail ramp rates are required - the SN54LS368AJ itself offers no integrated hot-swap features.

How does SN54LS368AJ differ from commercial SN74LS368A in terms of reliability and testing?

SN54LS368AJ undergoes full MIL-PRF-38535 Class B qualification, including extended temperature cycling (–55°C to +125°C), steady-state life testing, and lot acceptance testing per military standards. SN74LS368A is catalog-grade with 0°C to +70°C rating and commercial AQL sampling - SN54LS368AJ provides documented failure-in-time (FIT) rates, lot traceability, and radiation tolerance not guaranteed for SN74LS368A.

Can SN54LS368AJ drive terminated transmission lines directly?

SN54LS368AJ is not designed for direct 50 Ω or 75 Ω transmission line termination. Its ±20 mA output drive is optimized for unterminated TTL bus stubs up to 12 inches. For controlled-impedance lines, external series resistors (e.g., 33 Ω) are required to match characteristic impedance and suppress reflections - the SN54LS368AJ itself lacks built-in line-driver circuitry or adjustable slew rate control.

Is there a RoHS-compliant version of SN54LS368AJ available?

No RoHS-compliant variant of SN54LS368AJ exists. As a military-spec hermetic CDIP device, it uses leaded solder and non-RoHS materials per MIL-STD-1288 and QML-38535 requirements. TI does not offer a Pb-free or green-qualified version of this exact part number; alternative solutions require redesign to catalog-grade SN74LS368A in SOIC or PDIP packages, which forfeit military temperature range and screening.

SN54LS368AJ Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Logic Type:: -

Number of Elements:: -

Number of Bits per Element:: -

Input Type:: -

Output Type:: -

Current - Output High, Low:: -

Voltage - Supply:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

SN54LS368AJ FAQ

1.How can I place an order for SN54LS368AJ through Aetrix?

Please submit a Request for Quotation (RFQ) for SN54LS368AJ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SN54LS368AJ reliable?

The price and inventory of SN54LS368AJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN54LS368AJ is usually 5 days.

3.What payment methods are accepted for SN54LS368AJ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN54LS368AJ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN54LS368AJ?

SN54LS368AJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN54LS368AJ order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SN54LS368AJ?

For technical support, including SN54LS368AJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN54LS368AJ requirements.

6.How does Aetrix verify that SN54LS368AJ is sourced from the original manufacturer or authorized distributors?

All SN54LS368AJ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN54LS368AJ meets industry standards.

7.What is the process for return or replacement of SN54LS368AJ?

All SN54LS368AJ units undergo pre-shipment inspection (PSI). If there is an issue with SN54LS368AJ, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SN54LS368AJ part is unused and in its original packaging.

Return procedure for SN54LS368AJ:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…