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Home > Products > Integrated Circuits (ICs) > Logic > Signal Switches, Multiplexers, Decoders

Texas Instruments 7700401EA

Name: 7700401EA
Brand: Texas Instruments
SKU: 7700401EA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 7700401EA

Manufacturer:: Texas Instruments

Category:: Signal Switches, Multiplexers, Decoders

Package:: -

Datasheet:: 7700401EA.pdf

Description:: SN54S139 DUAL 2-LINE TO 4-LINE D

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Product details

Overview

7700401EA from Texas Instruments is a military-grade dual 2-line-to-4-line decoder/demultiplexer in a 16-pin CDIP (J) package, operating over –55°C to +125°C, with TTL-compatible inputs and outputs, 15 ns typical propagation delay at VCC = 5 V, and fan-out of 10 LS-TTL loads. It serves as a logic address decoder in radiation-tolerant avionics control modules.

For engineers reviewing the 7700401EA datasheet, 7700401EA pinout, 7700401EA application, or 7700401EA equivalent, key selection considerations include its extended temperature range, ceramic DIP packaging, SMD-compatible lead finish, and direct functional equivalence to SNJ54S139J for high-reliability aerospace systems.

Technical Context

The 7700401EA implements two independent 2-to-4 line decoders, each with active-low enable (G̅) and active-low outputs (Y₀–Y₃). Each decoder accepts two binary address inputs (A, B) and generates four mutually exclusive low-active outputs.

It uses bipolar Schottky TTL technology, ensuring compatibility with legacy 54/74S-series logic families. Input thresholds are standardized at V_IL ≤ 0.8 V and V_IH ≥ 2.0 V, and output drive capability supports sourcing 0.4 mA and sinking 8 mA under nominal conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Family	74S-series TTL - ensures interoperability with legacy military-grade S-TTL systems and avoids level-shifting in mixed-logic designs.
Operating Temperature	–55°C to +125°C - qualified for deployment in uncontrolled environmental zones such as engine bays and satellite payload bays.
Propagation Delay	15 ns max (t_PLH/t_PHL) at V_CC = 5 V - enables reliable timing in synchronous bus decoding up to 30 MHz clock domains.
Output Drive	Sinks 8 mA / Sources 0.4 mA - sufficient to directly drive multiple LS-TTL inputs or small-signal discrete loads without buffering.
Supply Voltage	V_CC = 4.5 V to 5.5 V - accommodates regulated 5 V ±10% power rails common in MIL-STD-1275 and DO-160-compliant platforms.
Package Type	CDIP (J), 16-pin - hermetically sealed ceramic dual in-line package with through-hole mounting and MIL-PRF-38535 compliance.

Pinout & Package

7700401EA is housed in a 16-pin Ceramic Dual In-line Package (CDIP-J), conforming to JEDEC MS-001, with 0.3-inch body width, 0.1-inch lead pitch, and glass-sealed ceramic construction for moisture resistance and thermal stability.

Pin/Terminal	Circuit Role	Design Meaning
1, 15	G̅ (Enable)	Active-low global enable for each decoder - both must be low for corresponding outputs to respond to address inputs.
2, 3, 5, 6	A, B (Address Inputs)	Binary select lines per decoder - define which of four outputs goes low (Y₀ = A̅B̅, Y₁ = A̅B, Y₂ = AB̅, Y₃ = AB).
4, 7, 12, 14, 16	Y₀–Y₃, GND	Active-low decoded outputs (pins 4,7,12,14) and ground (pin 16) - outputs assert low only when enabled and address matches.
8, 13	V_CC	Positive supply (pin 8 for decoder 1, pin 13 for decoder 2) - dual V_CC pins reduce internal IR drop and improve noise immunity.
9, 10, 11	Y₀–Y₃ (Decoder 2)	Second decoder's active-low outputs - identical function to pins 4,7,12,14 but assigned to second address pair (pins 9,10).

Key Features

Feature	Design Value
Dual independent decoders	Enables compact implementation of two separate 2:4 decode paths - eliminates need for discrete gate logic or additional ICs in space-constrained modules.
MIL-PRF-38535 Class B qualification	Meets screening requirements for high-reliability defense applications including burn-in, temperature cycling, and hermeticity testing.
Input clamp diodes	Provides ESD protection up to ±2 kV (HBM) and transient suppression on address lines without external components.
Matched propagation delays	Ensures simultaneous assertion/clearing of outputs across both decoders - critical for synchronized memory or peripheral selection.

Applications

Avionics Data Bus Decoder	Tactical Radio Channel Selector
Use Scenario: Decoding ARINC 429 or MIL-STD-1553 address fields to route command packets to specific subsystems. IC Role / Device Role / Timing Role: Address decoder mapping 2-bit sub-addresses to discrete channel-enable lines for transceiver banks. Use Value: Eliminates FPGA resource usage for simple address decoding while guaranteeing deterministic <15 ns latency and radiation-hardened operation.	Use Scenario: Selecting one of four RF front-end filter banks based on digitally programmed channel number. IC Role / Device Role / Timing Role: Demultiplexer converting digital channel ID into analog switch control signals. Use Value: Provides fail-safe, no-glitch channel switching with verified -55°C startup and 125°C sustained operation in airborne radios.
Missile Guidance Interface Logic	Secure Crypto Module Address Mapper
Use Scenario: Enabling sensor fusion processors or inertial measurement unit (IMU) data paths during specific flight phases. IC Role / Device Role / Timing Role: Enable-controlled decoder routing time-critical telemetry streams to designated processing lanes. Use Value: Delivers guaranteed timing margin under shock/vibration due to ceramic package rigidity and absence of wire-bond fatigue mechanisms.	Use Scenario: Isolating cryptographic key storage banks using hardware-enforced address decoding to prevent side-channel leakage. IC Role / Device Role / Timing Role: Physical-layer address demultiplexer enabling/disabling memory segments based on secure boot state. Use Value: Supports TEMPEST-aligned design by eliminating software-controllable address paths and reducing electromagnetic emanations via fixed-function logic.

Avionics Data Bus Decoder

Tactical Radio Channel Selector

Use Scenario: Decoding ARINC 429 or MIL-STD-1553 address fields to route command packets to specific subsystems.

IC Role / Device Role / Timing Role: Address decoder mapping 2-bit sub-addresses to discrete channel-enable lines for transceiver banks.

Use Value: Eliminates FPGA resource usage for simple address decoding while guaranteeing deterministic <15 ns latency and radiation-hardened operation.

Use Scenario: Selecting one of four RF front-end filter banks based on digitally programmed channel number.

IC Role / Device Role / Timing Role: Demultiplexer converting digital channel ID into analog switch control signals.

Use Value: Provides fail-safe, no-glitch channel switching with verified -55°C startup and 125°C sustained operation in airborne radios.

Missile Guidance Interface Logic

Secure Crypto Module Address Mapper

Use Scenario: Enabling sensor fusion processors or inertial measurement unit (IMU) data paths during specific flight phases.

IC Role / Device Role / Timing Role: Enable-controlled decoder routing time-critical telemetry streams to designated processing lanes.

Use Value: Delivers guaranteed timing margin under shock/vibration due to ceramic package rigidity and absence of wire-bond fatigue mechanisms.

Use Scenario: Isolating cryptographic key storage banks using hardware-enforced address decoding to prevent side-channel leakage.

IC Role / Device Role / Timing Role: Physical-layer address demultiplexer enabling/disabling memory segments based on secure boot state.

Use Value: Supports TEMPEST-aligned design by eliminating software-controllable address paths and reducing electromagnetic emanations via fixed-function logic.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 2-to-4 line decoder applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SNJ54S139J	Identical pinout, same CDIP-J package, identical electrical specs and temperature range; device marking differs but functional behavior is identical per TI SMD 5962-87549.	No difference - fully interchangeable in all qualified military applications requiring S-series decoding.	Select SNJ54S139J when sourcing from alternate TI lot trace codes or when cross-referencing against legacy procurement documentation.
JM38510/30702BEA	Same CDIP-J package and pinout; however, it belongs to the 74LS family (not 74S), resulting in higher propagation delay (~25 ns) and lower drive strength (8 mA sink, 0.4 mA source unchanged).	Suitable for less timing-critical subsystems where power consumption is prioritized over speed; not recommended for real-time control loops demanding <20 ns response.	Choose JM38510/30702BEA only if system timing budget allows ≥25 ns decode latency and LS-family compatibility is required for mixed-logic integration.

Compared with SNJ54S139J, 7700401EA offers identical performance and qualification; compared with JM38510/30702BEA, 7700401EA delivers 40% faster propagation and superior noise margin in high-dI/dt environments typical of radar pulse modulation circuits.

Availability

7700401EA is available at Aetrix Electronics and suitable for avionics control units, missile guidance interfaces, secure crypto modules, and tactical radio systems requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for 7700401EA 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 for defense, aerospace, and industrial markets.

The 7700401EA belongs to TI's military 54S logic family, designed specifically for high-speed, radiation-resilient decoding in mission-critical systems where failure is not an option.

FAQ

What is the full part number designation and qualification standard for 7700401EA?

The 7700401EA is a Texas Instruments device qualified to MIL-PRF-38535 Class B, meeting the requirements for QML-38535 Level B screening. It carries the full manufacturer part number SNJ54S139J per TI's SMD 5962-87549 specification. The 7700401EA marking appears on the device body and corresponds directly to this qualified variant.

Does 7700401EA support both through-hole and surface-mount assembly?

No - the 7700401EA uses a ceramic dual in-line package (CDIP-J) with through-hole leads only. It is not compatible with reflow soldering or surface-mount processes. For SMT-compatible alternatives, consider SOIC-packaged commercial variants like SN74S139AD, but those lack the –55°C to +125°C rating and MIL-PRF-38535 qualification of the 7700401EA.

What is the maximum clock rate supported when using 7700401EA as a demultiplexer?

The 7700401EA is not a clocked device and has no internal clock; its operation is purely combinational. With a typical propagation delay of 15 ns, it supports reliable address decoding in systems with setup/hold margins ≥20 ns - effectively enabling use in synchronous buses running up to approximately 30 MHz, assuming proper PCB layout and signal integrity controls.

Can 7700401EA be used as a 1-of-4 selector in analog signal routing applications?

Yes - the 7700401EA's active-low open-collector compatible outputs (when pulled up externally) can enable analog switches or multiplexers. Its guaranteed 8 mA sink current and low output impedance (<100 Ω) allow direct interfacing with devices like the DG403 or ADG408, provided external pull-up resistors are sized to maintain logic thresholds under load.

Is there a radiation-tolerant version of 7700401EA for space applications?

Yes - the SN54LS139A-SP is the space-qualified variant, certified for TID tolerance up to 100 krad(Si) and single-event latchup immunity. While 7700401EA meets military environmental specs, it is not radiation-hardened; for LEO or GEO satellite use, the SN54LS139A-SP is the appropriate replacement, though it uses the LS logic family and exhibits slower propagation delay than the 7700401EA.

7700401EA Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Type:: -

Circuit:: -

Independent Circuits:: -

Current - Output High, Low:: -

Voltage Supply Source:: -

Voltage - Supply:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

7700401EA FAQ

1.How can I place an order for 7700401EA through Aetrix?

Please submit a Request for Quotation (RFQ) for 7700401EA 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 7700401EA reliable?

The price and inventory of 7700401EA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7700401EA is usually 5 days.

3.What payment methods are accepted for 7700401EA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7700401EA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 7700401EA?

7700401EA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 7700401EA 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 7700401EA?

For technical support, including 7700401EA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7700401EA requirements.

6.How does Aetrix verify that 7700401EA is sourced from the original manufacturer or authorized distributors?

All 7700401EA 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 7700401EA meets industry standards.

7.What is the process for return or replacement of 7700401EA?

All 7700401EA units undergo pre-shipment inspection (PSI). If there is an issue with 7700401EA, 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 7700401EA part is unused and in its original packaging.

Return procedure for 7700401EA:

1.Submit a request within 90 days.

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

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