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

Texas Instruments SN54AS34J

Name: SN54AS34J
Brand: Texas Instruments
SKU: SN54AS34J
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN54AS34J

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: -

Datasheet:: SN54AS34J.pdf

Description:: BUFFER, AS SERIES, 6-FUNC, TTL

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SN54AS34J from Texas Instruments is a military-grade hex noninverting buffer IC performing Y = A logic with six independent channels, 1 ns typical propagation delay (tPLH/tPHL), 20 mA low-level output drive, and operation across −55°C to 125°C. It is used in high-reliability aerospace data routing, bus buffering, and level-shifting interfaces where TTL-compatible fanout and fast edge integrity are required.

For engineers reviewing the SN54AS34J datasheet, SN54AS34J pinout, SN54AS34J application, or SN54AS34J equivalent, key selection factors include its J-package ceramic DIP-14 mechanical form factor, −55°C to 125°C temperature rating, 20 mA IOL drive strength, and AS-family propagation timing under 50 pF load conditions.

Technical Context

The SN54AS34J implements six identical positive-logic noninverting buffers in a single monolithic bipolar TTL device. Each channel features open-collector compatible output structure, rail-to-rail input voltage tolerance up to 7 V, and guaranteed switching at VCC = 4.5 V to 5.5 V.

It belongs to the Advanced Schottky (AS) logic family, delivering higher speed and lower power than standard TTL while maintaining pin compatibility with earlier 74-series buffers. Its design targets deterministic signal conditioning in synchronous digital systems requiring precise timing margins and noise-immune drive capability.

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Range	4.5 V to 5.5 V - Ensures stable operation across military-grade supply variation without regulation overhead.
tPLH / tPHL	1 ns min / 6.5 ns max - Enables sub-7 ns worst-case propagation for high-speed clock/data distribution paths.
IOL	20 mA - Supports direct driving of multiple TTL inputs or moderate capacitive loads without external buffers.
VIH / VIL	2.0 V / 0.8 V - Provides robust noise margin against ground bounce and crosstalk in dense PCB layouts.
Operating Temp	−55°C to 125°C - Qualified for deployment in avionics, missile guidance, and space-qualified subsystems.
Package	Ceramic DIP-14 (J package) - Hermetically sealed, MIL-STD-883 compliant, suitable for high-reliability solder reflow and long-term storage.

Pinout & Package

Ceramic dual-in-line package (J package), 14-pin, 0.300-inch wide body, hermetically sealed with glass-metal lid. Pin 7 is GND; Pin 14 is VCC; all inputs/outputs arranged in mirrored pairs per buffer channel.

Pin/Terminal	Circuit Role	Design Meaning
1, 3, 5, 9, 11, 13	Input (1A–6A)	Buffer input terminals accepting TTL-compatible logic levels; each drives one independent output.
2, 4, 6, 8, 10, 12	Output (1Y–6Y)	Noninverting buffered outputs; capable of sourcing −2 mA or sinking 20 mA into TTL loads.
7	GND	Ground reference for all internal circuitry and output current return path.
14	VCC	Positive supply terminal; must be decoupled locally to suppress switching noise on shared rails.

Key Features

Feature	Design Value
Advanced Schottky TTL process	Delivers 3× faster switching than standard 74LS while retaining TTL voltage thresholds and drive compatibility.
Six independent buffers	Enables parallel signal conditioning without inter-channel coupling or timing skew between channels.
Military temperature qualification	Validated across −55°C to 125°C per MIL-PRF-38535, eliminating derating calculations for extreme-environment designs.
High sink current (20 mA)	Drives up to 10 standard TTL loads directly, reducing component count in bus interface and address latch circuits.

Applications

Aerospace Data Bus Interface	Missile Guidance Signal Conditioning
Use Scenario: Buffering address and control signals between radiation-hardened microcontrollers and memory modules in launch vehicle avionics. IC Role / Device Role / Timing Role: Noninverting signal repeater ensuring setup/hold timing compliance across 12-inch backplane traces. Use Value: 1 ns typical propagation delay preserves nanosecond-scale timing budgets in synchronous bus architectures operating above 20 MHz.	Use Scenario: Isolating sensor interface logic from high-noise actuator driver stages in inertial measurement units. IC Role / Device Role / Timing Role: Level-shifting and fanout buffer for analog-to-digital converter control lines exposed to EMI. Use Value: 20 mA IOL and −55°C to 125°C rating maintain signal integrity during rapid thermal cycling and vibration-induced ground shifts.
Secure Communication Module Timing	Onboard Diagnostic Controller Interface
Use Scenario: Synchronizing cryptographic engine clocks with host processor interrupt lines in encrypted telemetry transceivers. IC Role / Device Role / Timing Role: Low-skew buffer for critical timing signals requiring deterministic edge alignment across multiple subsystems. Use Value: Matched tPLH/tPHL characteristics (<1 ns variation) minimize jitter accumulation in cascaded clock distribution trees.	Use Scenario: Driving LED status indicators and relay control lines from an embedded diagnostic controller in flight control computers. IC Role / Device Role / Timing Role: Output driver stage providing TTL-compatible logic levels and sufficient current for discrete indicator loads. Use Value: Direct 20 mA sink capability eliminates need for external transistor drivers, reducing BOM count and board area in safety-critical monitoring circuits.

Aerospace Data Bus Interface

Missile Guidance Signal Conditioning

Use Scenario: Buffering address and control signals between radiation-hardened microcontrollers and memory modules in launch vehicle avionics.

IC Role / Device Role / Timing Role: Noninverting signal repeater ensuring setup/hold timing compliance across 12-inch backplane traces.

Use Value: 1 ns typical propagation delay preserves nanosecond-scale timing budgets in synchronous bus architectures operating above 20 MHz.

Use Scenario: Isolating sensor interface logic from high-noise actuator driver stages in inertial measurement units.

IC Role / Device Role / Timing Role: Level-shifting and fanout buffer for analog-to-digital converter control lines exposed to EMI.

Use Value: 20 mA IOL and −55°C to 125°C rating maintain signal integrity during rapid thermal cycling and vibration-induced ground shifts.

Secure Communication Module Timing

Onboard Diagnostic Controller Interface

Use Scenario: Synchronizing cryptographic engine clocks with host processor interrupt lines in encrypted telemetry transceivers.

IC Role / Device Role / Timing Role: Low-skew buffer for critical timing signals requiring deterministic edge alignment across multiple subsystems.

Use Value: Matched tPLH/tPHL characteristics (<1 ns variation) minimize jitter accumulation in cascaded clock distribution trees.

Use Scenario: Driving LED status indicators and relay control lines from an embedded diagnostic controller in flight control computers.

IC Role / Device Role / Timing Role: Output driver stage providing TTL-compatible logic levels and sufficient current for discrete indicator loads.

Use Value: Direct 20 mA sink capability eliminates need for external transistor drivers, reducing BOM count and board area in safety-critical monitoring circuits.

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex noninverting buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN54ALS34J	Lower drive (IOL = 8 mA), slower propagation (tPHL up to 12 ns), ALS family.	Suitable for lower-speed legacy systems where power consumption is prioritized over speed.	Select when system timing budget allows ≥12 ns propagation and total load capacitance remains <30 pF.
SNJ54AS34J	Identical electrical specs and pinout; differs only in screening level (QML Class V vs Class Q).	Required for programs mandating full QML-V qualification per MIL-PRF-38535.	Choose SNJ54AS34J if DoD contract requires QML-V certification; otherwise SN54AS34J meets Class Q requirements.

Compared with SN54ALS34J and SNJ54AS34J, the SN54AS34J offers optimal balance of speed, drive strength, and qualification level for new military designs-delivering 3× faster switching than ALS while avoiding the cost and lead-time premium of QML-V screening unless contractually mandated.

Availability

SN54AS34J is available at Aetrix Electronics and suitable for aerospace data routing, missile guidance signal conditioning, and secure communication module timing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN54AS34J 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 manufacturer founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and defense markets.

The SN54AS34J belongs to TI's military-grade Advanced Schottky TTL logic family, designed specifically for high-speed, high-reliability digital signal conditioning in aerospace, defense, and space-constrained embedded systems.

FAQ

What is the maximum operating temperature range for the SN54AS34J?

The SN54AS34J is characterized for operation from −55°C to 125°C, meeting MIL-STD-883 requirements for extended temperature performance. This range is verified across all electrical parameters including propagation delay, output drive, and input threshold stability. The SN54AS34J maintains full functionality without derating across this entire span, making it suitable for deployment in jet engine bays, satellite payload compartments, and other thermally extreme environments.

Does the SN54AS34J support 3.3 V logic interfacing?

No, the SN54AS34J is a 5 V-only TTL device and does not support direct 3.3 V logic interfacing. Its VIH minimum is 2.0 V and VIL maximum is 0.8 V, but it requires VCC = 4.5 V to 5.5 V for proper internal biasing and output swing. Interfacing with 3.3 V systems requires level-shifting circuitry such as TI's SN74LVC1T45 or discrete resistor-divider networks with appropriate current limiting.

What is the pin configuration difference between SN54AS34J and SN74AS34N?

The SN54AS34J uses a ceramic DIP-14 (J) package with hermetic sealing and military-grade lead finish, while the SN74AS34N uses a plastic DIP-14 (N) package rated for 0°C to 70°C. Both share identical pin numbering and function mapping: pins 1–13 alternate A/Y per buffer, pin 7 is GND, and pin 14 is VCC. Mechanical dimensions and thermal characteristics differ, but logic behavior and pinout are fully compatible.

Can the SN54AS34J drive a 50 pF capacitive load at full speed?

Yes, the SN54AS34J's switching characteristics are specified with CL = 50 pF and RL = 500 Ω, yielding tPLH ≤ 6.5 ns and tPHL ≤ 7 ns across −55°C to 125°C. These values were measured under those exact load conditions per the ALS/AS Logic Data Book, confirming reliable operation into 50 pF without added delay degradation or waveform distortion.

Is the SN54AS34J RoHS compliant?

The SN54AS34J is not RoHS compliant in its original ceramic J-package configuration, as it contains leaded solder seals and leaded finish per MIL-STD-883 requirements. TI does not offer a RoHS-compliant variant of this specific part number. For RoHS-compliant alternatives, consider modern replacements like SN74LVC1G07 (single buffer) with appropriate redesign, or consult TI's obsolescence roadmap for qualified drop-in options.

SN54AS34J 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:: -

SN54AS34J FAQ

1.How can I place an order for SN54AS34J through Aetrix?

Please submit a Request for Quotation (RFQ) for SN54AS34J 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 SN54AS34J reliable?

The price and inventory of SN54AS34J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN54AS34J is usually 5 days.

3.What payment methods are accepted for SN54AS34J?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN54AS34J transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN54AS34J?

SN54AS34J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN54AS34J 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 SN54AS34J?

For technical support, including SN54AS34J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN54AS34J requirements.

6.How does Aetrix verify that SN54AS34J is sourced from the original manufacturer or authorized distributors?

All SN54AS34J 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 SN54AS34J meets industry standards.

7.What is the process for return or replacement of SN54AS34J?

All SN54AS34J units undergo pre-shipment inspection (PSI). If there is an issue with SN54AS34J, 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 SN54AS34J part is unused and in its original packaging.

Return procedure for SN54AS34J:

1.Submit a request within 90 days.

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

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