Texas Instruments 8002002DA

Overview

8002002DA from Texas Instruments is a quadruple bus transceiver IC designed for asynchronous two-way data communication between parallel buses. It features PNP inputs (reducing DC loading), 400 mV typical input hysteresis (improving noise margin), and operates over –55°C to 125°C. It supports bidirectional A↔B data flow with independent enable control (GAB/GBA) and is used in military-grade digital backplane interfaces.

For engineers reviewing the 8002002DA datasheet, 8002002DA pinout, 8002002DA application, or 8002002DA equivalent, key selection criteria include its CFP-14 hermetic ceramic package, –55°C to 125°C operating range, LS logic family compatibility, and dual-directional bus isolation capability in high-reliability systems.

Technical Context

The 8002002DA implements four independent bidirectional data channels, each controlled by separate GAB (A-to-B enable) and GBA (B-to-A enable) signals. Its PNP-input structure lowers input current draw, while built-in hysteresis enhances immunity to slow-rising or noisy signals on bus lines.

It functions as a level-shifting and direction-controlled interface between two 4-bit data buses, supporting isolation (both enables low), latched operation (GAB=H, GBA=H), and unidirectional transfer in either direction - all without internal clocking or timing constraints, making it suitable for asynchronous bus coupling in legacy TTL systems.

Key Specifications

Pinout & Package

8002002DA is housed in a 14-pin Ceramic Flatpack (CFP/W) package with gull-wing leads, hermetically sealed for high-reliability applications. The package height is ≤5.08 mm, lead pitch is 2.54 mm, and body dimensions are 19.94 mm × 7.19 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bus transceiver applications.

Compared with SNJ54LS243W, 8002002DA offers identical functionality and reliability but uses a distinct orderable identifier for traceability in government procurement; versus 8002002CA, it provides superior hermetic sealing and thermal robustness essential for deployed military systems.

Availability

8002002DA is available at Aetrix Electronics and suitable for avionics integration, tactical communications hardware, and secure crypto module production requiring stable component supply across extended product lifecycles.

Supply support for 8002002DA 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 company founded in 1930, delivering analog and embedded processing solutions for industrial, automotive, and aerospace markets.

The SN54LS243 product line was developed to provide radiation-tolerant, temperature-hardened bus interface ICs for U.S. Department of Defense systems requiring guaranteed operation across extreme environmental stressors.

FAQ

What is the operating temperature range specified for the 8002002DA?

The 8002002DA is characterized for operation from –55°C to 125°C, fully compliant with the SN54LS243 military-grade specification. This range is validated per MIL-STD-883 test methods and applies across all electrical parameters including propagation delay, output drive, and input thresholds - making it suitable for deployment in jet engines, space-qualified payloads, and artillery fire-control systems where ambient extremes are routine.

Does the 8002002DA support bidirectional data transfer on all four channels simultaneously?

No - the 8002002DA supports bidirectional transfer per channel, but direction is controlled globally via GAB and GBA pins. When GAB is low and GBA is high, all four A→B paths are enabled; when GBA is low and GAB is high, all four B→A paths are enabled. Simultaneous A→B and B→A transfer is not supported; the device enforces unidirectional flow per transaction to prevent bus contention.

Is the 8002002DA pin-compatible with commercial SN74LS243 variants?

Yes, the 8002002DA shares identical pinout and logic function with SN74LS243N (PDIP) and SN74LS243DR (SOIC), but differs in package construction and temperature rating. While electrical interface is compatible, substitution requires validation of thermal, mechanical, and reliability requirements - especially since 8002002DA uses a hermetic CFP package rated to 125°C, unlike commercial SOIC versions limited to 70°C.

What is the maximum capacitive load the 8002002DA can drive while maintaining specified timing?

The 8002002DA's switching characteristics (tPLH/tPHL = 9–18 ns) are specified with RL = 667 Ω and CL = 45 pF. Driving loads beyond 45 pF increases propagation delay nonlinearly and may violate setup/hold margins in high-speed bus protocols. For heavier loads, external buffer staging or series termination is recommended - the device itself is not designed for >50 pF direct capacitive loading without timing derating.

How does the input hysteresis of the 8002002DA improve system-level noise immunity?

The 8002002DA provides ~400 mV of input hysteresis (VT+ – VT–), meaning the threshold for detecting a rising edge (~1.2 V) is 400 mV higher than for a falling edge (~0.8 V). This prevents oscillation or multiple toggles when input signals cross the threshold slowly or with superimposed noise - critical in electrically noisy environments such as vehicle powertrain control or radar proximity sensors where bus lines run alongside high-current conductors.