Texas Instruments SN74ABT5402DW

Overview

SN74ABT5402DW from Texas Instruments is a 12-bit noninverting 3-state buffer/line driver with dual active-low output-enable inputs (OE1, OE2), designed for memory address and clock bus driving in 5-V systems. It features 25-Ω integrated series output resistors, ±12 mA drive capability, and operates from −40°C to 85°C with VCC = 4.5 V to 5.5 V.

For engineers reviewing the SN74ABT5402DW datasheet, SN74ABT5402DW pinout, SN74ABT5402DW application, or SN74ABT5402DW equivalent, key selection considerations include its dual 3-state control logic, output-ground-bounce suppression (<1 V), low undershoot (<0.5 V), and SOIC-28 packaging for high-density PCB layouts.

Technical Context

This device implements a 2-input AND gate for 3-state control: both OE1 and OE2 must be low to enable outputs; either high forces all 12 Y outputs into high-impedance. Its EPIC-II^B BiCMOS process enables low power dissipation while maintaining TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2 V) and CMOS-level output swing.

Each output integrates a 25-Ω series resistor to dampen transmission-line reflections-eliminating external termination-and supports sourcing/sinking up to 12 mA at VOL ≤ 0.8 V (IOL = 12 mA) and VOH ≥ 3.3 V (IOH = −12 mA) under recommended conditions.

Key Specifications

Pinout & Package

SN74ABT5402DW is housed in a 28-pin plastic small-outline integrated circuit (SOIC) package (DW), 300 mil body width, with standard gull-wing leads and 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit noninverting 3-state buffer applications.

Compared with SN74ABT5402DW, SN74ABT244DW offers identical performance per channel but halves channel count per package-increasing component count for 12-bit use-while SN74LVC126APW sacrifices 5-V operation, integrated termination, and channel density to achieve sub-1-µA ICC.

Availability

SN74ABT5402DW is available at Aetrix Electronics and suitable for industrial control systems, legacy equipment repair, and 5-V bus interface designs requiring stable component supply and long-term obsolescence mitigation support.

Supply support for SN74ABT5402DW 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 leader founded in 1930, specializing in analog, embedded processing, and logic technologies for industrial, automotive, and communications markets.

The ABT logic family-including SN74ABT5402DW-was engineered for high-speed, low-noise 5-V bus interfacing with integrated termination, targeting memory, clock, and backplane applications in the 1990s industrial computing era.

FAQ

What is the operating voltage range for the SN74ABT5402DW?

The SN74ABT5402DW operates over a supply voltage range of 4.5 V to 5.5 V. This 5-V nominal specification ensures compatibility with standard TTL and earlier 74-series logic families while maintaining noise margin and drive strength across the full industrial temperature range (−40°C to +85°C). Absolute maximum VCC is 7 V, but sustained operation outside 4.5–5.5 V is not recommended.

Does the SN74ABT5402DW require external termination resistors?

No, the SN74ABT5402DW does not require external termination resistors. Each output integrates a 25-Ω series resistor optimized to match typical PCB trace impedances, directly reducing overshoot and undershoot. This eliminates the need for discrete 22–33 Ω resistors traditionally placed near drivers in high-speed bus designs.

How does the dual output-enable logic work on the SN74ABT5402DW?

The SN74ABT5402DW uses a 2-input AND gate for 3-state control: both OE1 and OE2 must be driven low to enable the 12 outputs (Y1–Y12). If either OE1 or OE2 is high, all outputs enter high-impedance mode. This architecture supports hierarchical bus control-for example, OE1 may serve as global enable while OE2 acts as local subsystem gate.

What is the maximum output current rating for the SN74ABT5402DW?

The SN74ABT5402DW is rated for ±12 mA per output-capable of sourcing up to 12 mA (IOH = −12 mA) with VOH ≥ 2.6 V and sinking up to 12 mA (IOL = 12 mA) with VOL ≤ 0.8 V at VCC = 4.5 V. This drive strength supports direct connection to multiple TTL inputs or short, unterminated transmission lines.

Is the SN74ABT5402DW still in active production?

No, the SN74ABT5402DW is marked as OBSOLETE by Texas Instruments. However, Aetrix Electronics maintains verified legacy inventory and offers extended supply chain support-including traceable sourcing, batch documentation, and lifecycle coordination-to sustain maintenance and repair of installed industrial and telecom systems relying on this part.