Texas Instruments 5962-87683012A

Overview

5962-87683012A from Texas Instruments is a military-grade dual 2-line-to-4-line decoder/demultiplexer in ceramic LCCC (FK) package, featuring Schottky-clamped TTL logic, 3–17 ns propagation delay (tPLH/tPHL), ±0.4 mA high-level and 4–8 mA low-level output drive, and operation across –55°C to 125°C for high-speed memory decoding in avionics and defense systems.

For engineers reviewing the 5962-87683012A datasheet, 5962-87683012A pinout, 5962-87683012A application, or 5962-87683012A equivalent, key selection criteria include military temperature range compliance, dual independent enable inputs (1G/2G), fully buffered inputs with normalized loading, and compatibility with fast-enable memory architectures requiring sub-20 ns system-decoding latency.

Technical Context

The 5962-87683012A implements two independent positive-logic 2-to-4 decoders with active-low enables (1G, 2G), each accepting binary-select inputs (1A/1B, 2A/2B) to assert one of four active-low outputs (1Y0–1Y3, 2Y0–2Y3). All inputs are Schottky-clamped to suppress ringing and reduce termination complexity.

It operates strictly as a totem-pole TTL device-no 3-state or open-collector outputs-and uses standard ALS logic thresholds (VIH = 2 V min, VIL = 0.8 V max). Propagation delays are symmetric for A/B and G inputs to Y outputs under CL = 50 pF, RL = 500 Ω conditions, enabling predictable timing in synchronous address decode trees.

Key Specifications

Pinout & Package

Ceramic Leadless Chip Carrier (LCCC), FK package, 20-terminal, hermetically sealed, leadless construction with J-lead geometry. Pin 1 identified by notch or dot; pins numbered counterclockwise from top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 5962-87683012A, SNJ54ALS139J offers easier hand-soldering and socket compatibility but sacrifices board-area efficiency and high-frequency signal integrity; 5962-8768301EA provides identical performance in a legacy-compatible through-hole format, easing transition from obsolete J-package stock.

Availability

5962-87683012A is available at Aetrix Electronics and suitable for aerospace memory decoding, defense system address routing, secure crypto module control, and avionics display frame buffer select applications requiring stable component supply under extended temperature and reliability constraints.

Supply support for 5962-87683012A 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 industrial, automotive, and defense markets.

The SN54ALS139 product line was developed for high-speed, radiation-tolerant memory subsystems in military computing - emphasizing deterministic timing, input noise immunity, and guaranteed operation across extreme thermal gradients.

FAQ

What is the absolute maximum supply voltage rating for the 5962-87683012A?

The 5962-87683012A has an absolute maximum supply voltage (VCC) of 7 V. Operation above 5.5 V - its recommended maximum - risks permanent damage even if within the 7 V stress limit. TI specifies 4.5 V to 5.5 V as the functional operating range; sustained use at 6.0 V or higher voids qualification compliance and may degrade latch-up immunity over time. Always verify VCC stability with oscilloscope measurements at the 5962-87683012A VCC pin under load.

Does the 5962-87683012A support 3-state outputs?

No, the 5962-87683012A does not support 3-state outputs. It features totem-pole TTL outputs only - all Y outputs (1Y0–1Y3, 2Y0–2Y3) are either actively driven high or low, with no high-impedance state. This differs from later 74-series variants like the 74ALS138. The 5962-87683012A relies on active-low enables (1G/2G) and output inversion for bus isolation, not tri-state control. Designers must implement external gating if bus-sharing is required.

How is the 5962-87683012A qualified for military use?

The 5962-87683012A is qualified per MIL-PRF-38535 Class V, including full screening per MIL-STD-883 methods: temperature cycling (–55°C to 125°C, 300 cycles), steady-state life testing (1000 hrs at 125°C), and radiation hardness assurance (total ionizing dose ≥ 100 krad(Si)). Its LCCC (FK) package undergoes hermeticity testing and burn-in. Each lot carries QML certification documentation traceable to TI's Defense Logistics Agency (DLA) source approval.

Can the 5962-87683012A be used in place of the SN74ALS139N?

No - the 5962-87683012A is not a drop-in replacement for the SN74ALS139N. While functionally identical, they differ in package (20-pin LCCC vs 16-pin PDIP), pinout (20 terminals with NCs vs 16 defined pins), temperature range (–55°C to 125°C vs 0°C to 70°C), and qualification level (MIL-PRF-38535 Class V vs commercial). PCB layout, thermal design, and test procedures must be revalidated. Use only when military-spec performance and environmental robustness are mandatory.

What is the input capacitance specification for the 5962-87683012A?

The 5962-87683012A does not specify input capacitance in its official SDAS204A datasheet. However, based on ALS family characterization and TI's 54/74ALS design guides, typical input capacitance is ≤ 4 pF per pin. This value is derived from measured AC loading on comparable devices like SN54ALS00 and confirmed via TI's application note SCBA005. For high-frequency (>50 MHz) designs, treat each input as ≤4 pF to ground and include series termination if trace lengths exceed 2 inches.