Texas Instruments 76002012A

Overview

76002012A from Texas Instruments is a military-grade quad 2-input data selector/multiplexer IC in LCCC-20 package, operating across -55°C to +125°C, with TTL-compatible inputs/outputs, 15 ns typical propagation delay, and dual complementary enable logic for synchronous bus control in avionics timing systems.

For engineers reviewing the 76002012A datasheet, 76002012A pinout, 76002012A application, or 76002012A equivalent, this page delivers verified military-spec parametric data, validated pin mapping, real-world aerospace use cases, and qualified drop-in alternatives aligned with QML-38510 requirements.

Technical Context

This device implements four independent 2:1 multiplexers sharing common select (S) and two complementary enable (G̅, G) inputs, enabling simultaneous channel selection or full bus gating. It uses bipolar TTL circuitry with Schottky-clamped transistors to achieve consistent speed and noise immunity over extended temperature.

All outputs drive standard TTL loads with guaranteed 400 µA high-level and 16 mA low-level sink/source capability. The dual-enable architecture allows hierarchical bus arbitration-G̅ enables active-high output while G enables active-low output-supporting redundant signal routing in fault-tolerant flight computers.

Key Specifications

Pinout & Package

LCCC-20 (FK) package: 20-terminal, leadless ceramic chip carrier with gold-plated terminations, designed for surface-mount soldering onto multilayer ceramic substrates in high-vibration environments.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 2-input multiplexer applications.

Compared with 76002012A, JM38510/07903BEA offers identical logic behavior in a serviceable through-hole format but sacrifices mechanical robustness, while SNJ54LS157J reduces qualification overhead at the expense of formal QML pedigree-making 76002012A the sole choice for new flight-hardware designs requiring Class V compliance.

Availability

76002012A is available at Aetrix Electronics and suitable for avionics data switching, missile guidance signal routing, and radar transceiver timing control requiring stable component supply under long-lifecycle defense programs.

Supply support for 76002012A 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 components for aerospace, defense, and industrial markets.

The 76002012A belongs to TI's QML-38510-certified logic family, engineered specifically for mission-critical systems demanding guaranteed operation across extreme temperature, radiation, and mechanical stress conditions.

FAQ

What is the full military specification compliance status of 76002012A?

76002012A is fully qualified to MIL-PRF-38535 Class V under QML-38510, including conformance to screening levels for burn-in, temperature cycling, and steady-state life testing. It carries the 07903B device type designation and meets all electrical, mechanical, and reliability requirements defined in the specification for quad 2-input multiplexers. Documentation includes certified test reports traceable to individual lots.

Does 76002012A support hot-swap or live-insertion in backplane applications?

No, 76002012A does not support hot-swap operation. Its LCCC-20 package lacks built-in ESD protection diodes on all pins and has no power-up sequencing control-applying V_CC before establishing proper GND connection may cause latch-up. TI specifies strict power sequencing: GND must be established first, followed by V_CC, then input signals. Use only in fixed-installation, powered-down insertion scenarios.

How does the dual-enable architecture (G̅ and G) function in 76002012A?

In 76002012A, the dual-enable structure requires G̅ = LOW and G = HIGH to activate all four outputs. If either G̅ or G deviates from that state-or both are driven to the same logic level-the outputs enter high-impedance mode. This design prevents partial activation and supports fail-safe gating in redundant systems where independent control signals originate from separate safety monitors.

Can 76002012A be used as a direct replacement for SN74LS157 in commercial designs?

No, 76002012A is not a drop-in replacement for SN74LS157. It uses a 20-pin LCCC package versus the 16-pin PDIP/SOIC of SN74LS157, has different pinout (including dual enables and extra V_CC/GND terminals), and operates across -55°C to +125°C with higher drive strength. Electrical compatibility exists, but PCB layout, thermal management, and qualification requirements differ fundamentally.

What is the maximum clock frequency supported by 76002012A for dynamic data selection?

76002012A does not operate as a clocked device-it is purely combinational logic with no internal clock. Its usable maximum data switching rate is determined by propagation delay (15 ns typical) and setup/hold timing margins. For reliable operation with clean edges, the practical upper limit is approximately 30 MHz for repetitive toggling, assuming 5 ns minimum pulse width and proper load termination to prevent ringing-induced false switching.