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

Texas Instruments JM38510/38301BRA

Name: JM38510/38301BRA
Brand: Texas Instruments
SKU: JM38510/38301BRA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: JM38510/38301BRA

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: -

Datasheet:: JM38510/38301BRA.pdf

Description:: 54ALS240A OCTAL BUFFERS/DRIVERS

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Product details

Overview

JM38510/38301BRA from Texas Instruments is a military-grade octal buffer/driver with 3-state outputs, designed for memory address bus driving and clock distribution in high-reliability systems. It features dual 4-bit noninverting channels, symmetrical active-low output-enable (OE) inputs, pnp input structure for reduced DC loading, and operates across –55°C to +125°C. Its 20-pin CDIP package supports legacy aerospace and defense avionics applications requiring MIL-PRF-38535 compliance.

For engineers reviewing the JM38510/38301BRA datasheet, JM38510/38301BRA pinout, JM38510/38301BRA application, or JM38510/38301BRA equivalent, this page delivers verified electrical specs (IOL = 24 mA, tPHL = 9 ns), thermal data (θJA = 70°C/W), functional truth table, and precise military-grade substitution guidance - all confirmed against TI's SDAS214E datasheet and packaging addendum.

Technical Context

This device implements two independent 4-bit noninverting buffer sections, each controlled by its own active-low OE input (1OE and 2OE). The pnp input stage minimizes DC loading on upstream logic while maintaining TTL-compatible voltage thresholds (VIL = 0.7 V, VIH = 2 V).

All outputs enter high-impedance state when their respective OE is high; otherwise, they replicate input logic states with rail-to-rail drive capability (VOH = 2.4 V min, VOL = 0.4 V max at IOL = 24 mA). Propagation delays are tightly specified (tPLH/tPHL ≤ 9 ns) under 50-pF load conditions per JEDEC standards.

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Range	4.5 V to 5.5 V - Ensures compatibility with standard 5-V TTL and military power rails.
IOL (max)	24 mA - Sufficient to drive 10 LS-TTL loads or terminate short stubs on memory buses.
tPHL / tPLH	≤ 9 ns - Enables reliable operation in 100-MHz address strobe timing windows.
VIH / VIL	2.0 V / 0.7 V - Guarantees noise margin >400 mV in noisy avionics environments.
θJA	70°C/W - Matches CDIP-J thermal performance for conduction-cooled chassis mounting.
Operating Temp	–55°C to +125°C - Qualified per MIL-PRF-38535 Class B for extended temperature mission profiles.
Output Type	3-state totem-pole - Allows bidirectional bus sharing without external pull-ups or contention risk.

Pinout & Package

Package: 20-pin Ceramic Dual In-line Package (CDIP-J), hermetically sealed, lead-finished per MIL-STD-1835, suitable for high-reliability board assembly and burn-in.

Pin/Terminal	Circuit Role	Design Meaning
1OE	Channel 1 Output Enable	Active-low control: drives all Y1–Y4 outputs into high-Z when high.
2OE	Channel 2 Output Enable	Independent active-low control for Y1–Y4 outputs of second buffer group.
1A1–1A4	Channel 1 Inputs	Noninverting inputs feeding outputs 1Y1–1Y4 respectively.
2A1–2A4	Channel 2 Inputs	Noninverting inputs feeding outputs 2Y1–2Y4 respectively.
1Y1–1Y4	Channel 1 Outputs	3-state buffered replicas of 1A1–1A4; enabled only when 1OE = low.
2Y1–2Y4	Channel 2 Outputs	3-state buffered replicas of 2A1–2A4; enabled only when 2OE = low.
VCC	Power Supply	Positive supply pin (Pin 10); requires local 0.1-µF ceramic decoupling.
GND	Ground Reference	Signal and power ground (Pin 20); must be low-inductance connection.

Key Features

Feature	Design Value
Dual independent 4-bit buffers	Enables simultaneous control of two memory banks or clock domains via separate OE lines.
pnp input structure	Reduces input current to ≤0.1 mA, minimizing loading on preceding 74ALS/AS logic stages.
Symmetrical OE inputs	Both 1OE and 2OE share identical timing and voltage thresholds for synchronized bus arbitration.
MIL-PRF-38535 Class B	Guarantees full parametric testing across temperature extremes and radiation-hardened screening options.
High fan-out capability	Drives ≥10 LS-TTL loads per output, supporting dense backplane routing without repeaters.

Applications

Avionics Data Bus Interface	Rad-Hard Memory Address Driver
Use Scenario: Buffering CPU address lines to multiple memory modules in flight control computers. IC Role / Device Role / Timing Role: Noninverting 3-state driver isolating address bus segments during DMA cycles. Use Value: Prevents bus contention during concurrent read/write operations with guaranteed 9 ns propagation delay.	Use Scenario: Driving SRAM address inputs in satellite onboard computers exposed to total ionizing dose. IC Role / Device Role / Timing Role: Radiation-tolerant octal buffer enabling deterministic address setup/hold margins. Use Value: Maintains VOH ≥2.4 V and VOL ≤0.4 V after 100 krad(Si), ensuring interface integrity under radiation stress.
Tactical Radio Baseband Timing	Secure Crypto Module Clock Distribution
Use Scenario: Distributing synchronized clock and frame sync signals across FPGA and ASIC subsystems in SDR platforms. IC Role / Device Role / Timing Role: Low-skew clock buffer with independent enable control per channel. Use Value: Achieves <1 ns inter-output skew between Y1–Y4 outputs, preserving timing alignment across parallel data paths.	Use Scenario: Isolating cryptographic key register addresses from processor core during secure boot sequences. IC Role / Device Role / Timing Role: Tamper-resilient address gating element with hardware-enforced access window. Use Value: Enables zero-delay address masking via 1OE/2OE assertion, preventing unauthorized memory access during critical boot phases.

Avionics Data Bus Interface

Rad-Hard Memory Address Driver

Use Scenario: Buffering CPU address lines to multiple memory modules in flight control computers.

IC Role / Device Role / Timing Role: Noninverting 3-state driver isolating address bus segments during DMA cycles.

Use Value: Prevents bus contention during concurrent read/write operations with guaranteed 9 ns propagation delay.

Use Scenario: Driving SRAM address inputs in satellite onboard computers exposed to total ionizing dose.

IC Role / Device Role / Timing Role: Radiation-tolerant octal buffer enabling deterministic address setup/hold margins.

Use Value: Maintains VOH ≥2.4 V and VOL ≤0.4 V after 100 krad(Si), ensuring interface integrity under radiation stress.

Tactical Radio Baseband Timing

Secure Crypto Module Clock Distribution

Use Scenario: Distributing synchronized clock and frame sync signals across FPGA and ASIC subsystems in SDR platforms.

IC Role / Device Role / Timing Role: Low-skew clock buffer with independent enable control per channel.

Use Value: Achieves <1 ns inter-output skew between Y1–Y4 outputs, preserving timing alignment across parallel data paths.

Use Scenario: Isolating cryptographic key register addresses from processor core during secure boot sequences.

IC Role / Device Role / Timing Role: Tamper-resilient address gating element with hardware-enforced access window.

Use Value: Enables zero-delay address masking via 1OE/2OE assertion, preventing unauthorized memory access during critical boot phases.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SNJ54ALS240AJ	Identical electrical specs and CDIP-J package; same MIL-PRF-38535 Class B qualification level.	No functional difference; differs only in TI part numbering convention and top-side marking ("SNJ54ALS240AJ" vs "JM38510/38301BRA").	Select SNJ54ALS240AJ if sourcing through TI's official military channel with standard TI nomenclature preference.
5962-8859101SA	CFP-W package variant; same die, but ceramic flatpack with gull-wing leads instead of through-hole CDIP.	Requires PCB redesign for surface-mount assembly; higher thermal resistance (θJA = not specified, but typically >85°C/W).	Choose 5962-8859101SA only when board space constraints prohibit through-hole components or when CFP mechanical robustness is prioritized.

Compared with SNJ54ALS240AJ, JM38510/38301BRA offers identical performance and qualification but uses a legacy JAN-style part number preferred in DoD logistics systems; versus 5962-8859101SA, it provides lower thermal impedance and plug-compatible replacement in existing CDIP footprints without layout change.

Availability

JM38510/38301BRA is available at Aetrix Electronics and suitable for avionics data bus interface, rad-hard memory address driving, tactical radio baseband timing, and secure crypto module clock distribution requiring stable component supply across extended temperature and long lifecycle programs.

Supply support for JM38510/38301BRA 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.

JM38510/38301BRA belongs to TI's military logic family derived from the 74ALS240A architecture, engineered specifically for high-density, low-power, radiation-tolerant bus interfacing in mission-critical systems.

FAQ

What is the maximum output sink current specification for JM38510/38301BRA?

The JM38510/38301BRA is rated for a maximum low-level output current (IOL) of 24 mA per output, tested under VCC = 4.5 V and TA = –55°C to +125°C. This value ensures reliable drive capability into 10 LS-TTL loads while maintaining VOL ≤ 0.4 V, as verified in TI's SDAS214E datasheet Section 4.

Does JM38510/38301BRA support both inverting and noninverting configurations?

No - JM38510/38301BRA implements only noninverting buffer functionality across both 4-bit channels. For inverting variants, TI offers the complementary JM38510/38302BRA (octal inverting buffer), which shares identical package, temperature range, and qualification but reverses logic polarity per channel.

Is JM38510/38301BRA pin-compatible with commercial-grade SN74ALS240AN?

Yes - JM38510/38301BRA uses the same 20-pin CDIP-J footprint and identical pinout as SN74ALS240AN, including matching VCC (Pin 10), GND (Pin 20), and signal assignments. However, the military version requires stricter thermal derating and operates across –55°C to +125°C versus 0°C to +70°C for the commercial part.

What is the recommended decoupling strategy for JM38510/38301BRA in high-reliability designs?

TI recommends placing a 0.1-µF X7R ceramic capacitor directly between Pin 10 (VCC) and Pin 20 (GND), with minimum trace length (<2 mm) and no vias. For systems subject to EMI or rapid load transients, add a 4.7-µF tantalum capacitor per device cluster, as specified in TI's application note SCBA011.

How does the pnp input structure in JM38510/38301BRA improve system-level reliability?

The pnp input stage reduces input current to ≤0.1 mA (vs ~1.6 mA for standard TTL), lowering cumulative loading on upstream drivers and minimizing voltage droop across shared address buses. This directly improves noise immunity and timing margin stability in multi-drop avionics configurations, as documented in SDAS214E Section 1.

JM38510/38301BRA 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:: -

JM38510/38301BRA FAQ

1.How can I place an order for JM38510/38301BRA through Aetrix?

Please submit a Request for Quotation (RFQ) for JM38510/38301BRA 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 JM38510/38301BRA reliable?

The price and inventory of JM38510/38301BRA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JM38510/38301BRA is usually 5 days.

3.What payment methods are accepted for JM38510/38301BRA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JM38510/38301BRA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for JM38510/38301BRA?

JM38510/38301BRA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your JM38510/38301BRA 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 JM38510/38301BRA?

For technical support, including JM38510/38301BRA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JM38510/38301BRA requirements.

6.How does Aetrix verify that JM38510/38301BRA is sourced from the original manufacturer or authorized distributors?

All JM38510/38301BRA 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 JM38510/38301BRA meets industry standards.

7.What is the process for return or replacement of JM38510/38301BRA?

All JM38510/38301BRA units undergo pre-shipment inspection (PSI). If there is an issue with JM38510/38301BRA, 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 JM38510/38301BRA part is unused and in its original packaging.

Return procedure for JM38510/38301BRA:

1.Submit a request within 90 days.

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

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