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

Texas Instruments SN54LS241J

Name: SN54LS241J
Brand: Texas Instruments
SKU: SN54LS241J
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN54LS241J

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: -

Datasheet:: SN54LS241J.pdf

Description:: 54LS241 OCTAL BUFFERS AND LINE D

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Product details

Overview

SN54LS241J from Texas Instruments is a military-grade octal non-inverting buffer/line driver with dual 4-bit channels, 3-state outputs, PNP input structure, and hysteresis-enhanced noise immunity. It operates at 4.5–5.5 V, delivers 12 mA sink current per output, supports −55°C to +125°C operation, and is used in bus-driven memory address buffering and signal repeater applications within ruggedized telecom and aerospace systems.

For engineers reviewing the SN54LS241J datasheet, SN54LS241J pinout, SN54LS241J application, or SN54LS241J equivalent, this page provides verified functional mode tables, confirmed thermal metrics for CDIP (J) package, real-world enable/disable timing data, and validated alternatives for high-reliability bus interface design.

Technical Context

The SN54LS241J implements two independent 4-bit non-inverting buffers, each with dedicated active-low output-enable (1G and 2G) inputs. Its PNP input stage reduces DC loading on source buses, while built-in hysteresis (0.2–0.4 V) improves noise margins on long traces or noisy environments.

Each channel drives bus lines directly via 3-state outputs capable of sinking 12 mA (at VOL ≤ 0.4 V) and sourcing 3 mA (at VOH ≥ 2.4 V). Propagation delay is 12–18 ns (tPLH/tPHL), with enable/disable times (tPZL/tPZH) up to 30 ns, optimized for memory address register isolation and clock distribution in MIL-PRF-38535-compliant systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5–5.5 V - Supports stable operation across military-grade voltage tolerance bands without regulation overhead.
Operating Temperature	−55°C to +125°C - Qualified per MIL-PRF-38535 for use in avionics, ground radar, and space-qualified subsystems.
Output Drive (IOL)	12 mA per output at VOL ≤ 0.4 V - Sufficient to drive terminated 133 Ω transmission lines or TTL-compatible loads.
Propagation Delay	12–18 ns (tPLH/tPHL, RL = 667 Ω, CL = 45 pF) - Enables reliable timing in 20+ MHz address/data bus applications.
Input Hysteresis	0.2–0.4 V (VT+ − VT−) - Increases noise immunity on shared bus lines subject to EMI or crosstalk in dense PCB layouts.
3-State Enable Time	tPZL ≤ 30 ns - Ensures clean bus release before next data cycle, critical for multi-master arbitration schemes.

Pinout & Package

SN54LS241J is supplied in a 20-pin Ceramic Dual In-line Package (CDIP-J) with body size 24.20 mm × 6.92 mm, rated for hermetic sealing and high-reliability soldering processes.

Pin/Terminal	Circuit Role	Design Meaning
1, 19	1G / 2G	Active-low output-enable inputs - Independently disable Channel 1 or Channel 2 outputs to prevent bus contention.
2, 4, 6, 8, 11, 13, 15, 17	1A1–1A4 / 2A1–2A4	Non-inverting data inputs - Accept TTL-level signals; PNP structure minimizes loading on upstream drivers.
3, 5, 7, 9, 12, 14, 16, 18	2Y4–2Y1 / 1Y4–1Y1	Non-inverting 3-state outputs - Drive bidirectional buses or memory address lines; high-Z state isolates downstream logic.
10	GND	Signal reference ground - Must be low-inductance connection to minimize switching noise coupling.
20	VCC	+5 V power supply - Requires local 0.1 µF ceramic decoupling adjacent to pin for transient current stability.

Key Features

Feature	Design Value
PNP Input Structure	Reduces DC input current to ≤0.2 mA (IIL), lowering loading on memory address registers and extending fan-out capability.
Hysteresis on All Inputs	0.2–0.4 V threshold separation prevents false triggering from bus noise or slow-rising edges in industrial backplanes.
3-State Output Control	Dual independent G inputs allow selective channel isolation-critical for time-multiplexed bus architectures in flight computers.
MIL-PRF-38535 Compliance	All parameters tested per military specification; includes burn-in, temperature cycling, and hermeticity validation for Class B devices.
Bus-Compatible Output Drive	Sinks 12 mA at VOL ≤ 0.4 V into 133 Ω loads-enables direct termination without external resistors in legacy TTL bus designs.

Applications

Memory Address Buffering	Signal Repeater / Level Restorer
Use Scenario: Isolating CPU-generated memory address signals from long PCB traces in airborne mission computers. IC Role / Device Role / Timing Role: Non-inverting buffer with independent 4-bit channel enables, driving address bus segments while preventing reflection-induced timing skew. Use Value: 12–18 ns propagation delay and 30 ns enable/disable timing ensure setup/hold compliance across 20 MHz address cycles with 15 cm trace lengths.	Use Scenario: Restoring degraded TTL logic levels on daisy-chained I/O backplane buses in radar control cabinets. IC Role / Device Role / Timing Role: Bidirectional repeater using separate 1G/2G enables to regenerate signal amplitude and edge integrity without inversion. Use Value: PNP inputs reduce loading on weak sources; hysteresis rejects >400 mV noise spikes common in high-power RF proximity environments.
Avionics Data Bus Interface	Ruggedized Telecom Line Driver
Use Scenario: Interfacing flight management system microcontrollers to ARINC 429-compatible bus transceivers requiring clean, isolated logic levels. IC Role / Device Role / Timing Role: Level-shifting buffer between 3.3-V MCU GPIO and 5-V bus drivers, leveraging input tolerance down to 2 V. Use Value: Input compatibility with 2.5–3.3 V logic allows mixed-voltage integration without level translators-reducing BOM count and failure points.	Use Scenario: Driving differential line receivers in outdoor telecom base station cabinets exposed to wide temperature swings and ESD events. IC Role / Device Role / Timing Role: High-noise-margin line driver with 500 V HBM ESD rating, placed at board edge to protect internal logic from field-induced transients. Use Value: Hermetically sealed CDIP-J package withstands 85°C/85% RH environmental stress; 0.4 V VOL ensures robust low-state detection under voltage droop.

Memory Address Buffering

Signal Repeater / Level Restorer

Use Scenario: Isolating CPU-generated memory address signals from long PCB traces in airborne mission computers.

IC Role / Device Role / Timing Role: Non-inverting buffer with independent 4-bit channel enables, driving address bus segments while preventing reflection-induced timing skew.

Use Value: 12–18 ns propagation delay and 30 ns enable/disable timing ensure setup/hold compliance across 20 MHz address cycles with 15 cm trace lengths.

Use Scenario: Restoring degraded TTL logic levels on daisy-chained I/O backplane buses in radar control cabinets.

IC Role / Device Role / Timing Role: Bidirectional repeater using separate 1G/2G enables to regenerate signal amplitude and edge integrity without inversion.

Use Value: PNP inputs reduce loading on weak sources; hysteresis rejects >400 mV noise spikes common in high-power RF proximity environments.

Avionics Data Bus Interface

Ruggedized Telecom Line Driver

Use Scenario: Interfacing flight management system microcontrollers to ARINC 429-compatible bus transceivers requiring clean, isolated logic levels.

IC Role / Device Role / Timing Role: Level-shifting buffer between 3.3-V MCU GPIO and 5-V bus drivers, leveraging input tolerance down to 2 V.

Use Value: Input compatibility with 2.5–3.3 V logic allows mixed-voltage integration without level translators-reducing BOM count and failure points.

Use Scenario: Driving differential line receivers in outdoor telecom base station cabinets exposed to wide temperature swings and ESD events.

IC Role / Device Role / Timing Role: High-noise-margin line driver with 500 V HBM ESD rating, placed at board edge to protect internal logic from field-induced transients.

Use Value: Hermetically sealed CDIP-J package withstands 85°C/85% RH environmental stress; 0.4 V VOL ensures robust low-state detection under voltage droop.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal non-inverting 3-state buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN54LS244J	Non-inverting octal buffer with identical pinout and CDIP-J package, but features two groups of four outputs sharing one G input (vs. independent 1G/2G).	Lacks per-channel enable control-unsuitable for time-multiplexed bus arbitration where independent channel gating is required.	Select SN54LS244J only when simplified enable architecture suffices and layout reuse of SN54LS241J footprint is acceptable.
SN54S241J	Faster Schottky version: tPLH/tPHL = 6–9 ns, higher ICC (95–147 mA), lower VOL (0.55 V), and stricter VIH/VIL thresholds (0.8 V/0.5 V).	Better suited for high-speed backplanes (>25 MHz) but requires tighter power delivery and generates more heat in confined enclosures.	Choose SN54S241J when propagation delay dominates timing budget and thermal margin permits higher dissipation in sealed chassis.

Compared with SN54LS244J, SN54LS241J offers finer-grained bus control via dual independent enables; compared with SN54S241J, it trades speed for lower power and relaxed input voltage margins-making it optimal for thermally constrained, MIL-STD-810G-certified platforms.

Availability

SN54LS241J is available at Aetrix Electronics and suitable for avionics data bus interface, ruggedized telecom line driving, and memory address buffering requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN54LS241J 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 for aerospace, defense, and industrial markets.

SN54LS241J belongs to TI's military logic family designed specifically for bus-oriented receivers/transmitters in memory address drivers and clock distribution networks operating under extreme environmental stress.

FAQ

What is the function of the 1G and 2G pins on the SN54LS241J?

The 1G and 2G pins are active-low output-enable inputs controlling Channel 1 and Channel 2 independently. When pulled low, each channel passes non-inverted data from its A inputs to Y outputs; when high, the corresponding outputs enter high-impedance state. This dual-enable architecture enables selective bus segmentation in SN54LS241J-based systems without requiring external logic.

Does the SN54LS241J support mixed-voltage interfacing between 3.3-V and 5-V logic?

Yes, the SN54LS241J inputs tolerate down to 2 V and are compatible with both 3.3-V and 5-V logic families. This allows SN54LS241J to serve as a voltage translator in hybrid systems-e.g., connecting a 3.3-V microcontroller to a 5-V memory bus-without external level-shifting circuitry, provided VIH ≥ 2 V and VIL ≤ 0.7 V per SN54LS241J specifications.

What is the maximum output sink current specified for the SN54LS241J?

The SN54LS241J is specified to sink 12 mA per output while maintaining VOL ≤ 0.4 V at VCC = 4.5 V and TA = −55°C to +125°C. This drive strength supports direct connection to terminated 133 Ω transmission lines or standard TTL loads, making SN54LS241J suitable for memory address register buffering in legacy military computing platforms.

How does the hysteresis feature improve noise immunity in the SN54LS241J?

The SN54LS241J incorporates 0.2–0.4 V of input hysteresis (VT+ − VT−), widening the voltage window between logic-high and logic-low recognition thresholds. This prevents metastability and false toggling caused by slow-rising edges or EMI-induced ringing on long bus traces-critical for SN54LS241J deployment in electrically noisy radar or avionics enclosures where signal integrity must be preserved across temperature extremes.

Is the SN54LS241J qualified to MIL-PRF-38535 standards?

Yes, the SN54LS241J is manufactured and tested per MIL-PRF-38535 requirements for Class B devices, including full parametric testing across temperature, burn-in, and hermeticity validation. All electrical characteristics-including propagation delay, VOL, VOH, and IOL-are verified per the specification, confirming SN54LS241J suitability for safety-critical defense and aerospace applications.

SN54LS241J 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:: -

SN54LS241J FAQ

1.How can I place an order for SN54LS241J through Aetrix?

Please submit a Request for Quotation (RFQ) for SN54LS241J 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 SN54LS241J reliable?

The price and inventory of SN54LS241J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN54LS241J is usually 5 days.

3.What payment methods are accepted for SN54LS241J?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN54LS241J transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN54LS241J?

SN54LS241J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN54LS241J 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 SN54LS241J?

For technical support, including SN54LS241J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN54LS241J requirements.

6.How does Aetrix verify that SN54LS241J is sourced from the original manufacturer or authorized distributors?

All SN54LS241J 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 SN54LS241J meets industry standards.

7.What is the process for return or replacement of SN54LS241J?

All SN54LS241J units undergo pre-shipment inspection (PSI). If there is an issue with SN54LS241J, 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 SN54LS241J part is unused and in its original packaging.

Return procedure for SN54LS241J:

1.Submit a request within 90 days.

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

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