Texas Instruments SN74ABT5400ADWR

Overview

SN74ABT5400ADWR from Texas Instruments is an 11-bit noninverting 3-state line/memory driver with dual active-low output-enable inputs, designed for memory address and bus interface applications. It operates from 4.5 V to 5.5 V, supports ±12 mA output drive, integrates 25-Ω series output resistors, and is rated for –40°C to 85°C operation in a 28-pin SOIC (DW) package.

For engineers reviewing the SN74ABT5400ADWR datasheet, SN74ABT5400ADWR pinout, SN74ABT5400ADWR application, or SN74ABT5400ADWR equivalent, key selection criteria include 3-state bus contention control, output undershoot/overshoot suppression, latch-up immunity (>500 mA), ground bounce performance (<1 V), and compatibility with TTL-level control logic.

Technical Context

This device implements a dual-gated 3-state architecture where OE1 and OE2 feed a 2-input AND gate-either high disables all 11 outputs into high-impedance. Its EPIC-II^B BiCMOS process enables low power dissipation while maintaining TTL-compatible input thresholds (V_IL = 0.8 V, V_VIH = 2 V) and robust output switching (t_PLH/t_PHL ≤ 6.3 ns at 5 V).

The integrated 25-Ω series termination eliminates external resistors and reduces signal integrity issues: typical VOLV < 0.5 V and VOLP < 1 V at V_CC = 5 V, TA = 25°C. Absolute maximum ratings include 7 V supply tolerance and –0.5 V to 5.5 V output voltage range during power-off states.

Key Specifications

Pinout & Package

SN74ABT5400ADWR is housed in a 28-pin plastic small-outline (DW) package with 300-mil body width and standard SOIC footprint. Pin 1 is located at top-left corner (notch or dot marked), with pins numbered counter-clockwise.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 11-bit 3-state buffer applications.

Compared with SN74ABT244N and SN74LVC541APW, SN74ABT5400ADWR uniquely delivers 11-bit width, 5-V operation, and integrated 25-Ω termination in a single SOIC package-enabling compact, drop-in replacement for legacy memory address buffering without redesign or layout changes.

Availability

SN74ABT5400ADWR is available at Aetrix Electronics and suitable for memory subsystem design, industrial bus interface, and clock distribution applications requiring stable component supply, long-term lifecycle support, and guaranteed 5-V TTL compatibility.

Supply support for SN74ABT5400ADWR 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 delivering analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.

The ABT logic family-including SN74ABT5400ADWR-is engineered for high-speed, low-noise 5-V bus interfacing with integrated termination and robust latch-up immunity for mission-critical memory and control systems.

FAQ

What is the recommended power-up sequence for SN74ABT5400ADWR to ensure defined 3-state behavior?

TI recommends tying OE1 and OE2 to V_CC through a pullup resistor during power-up and power-down. The minimum resistor value depends on the current-sinking capability of the driving logic but must guarantee both OE inputs remain low only when intentional 3-state disable is required. This prevents undefined output states during V_CC ramp, ensuring safe bus initialization. SN74ABT5400ADWR has no internal power-on reset, so external OE control is mandatory for deterministic startup.

Does SN74ABT5400ADWR support hot insertion or live insertion into a powered-backplane system?

SN74ABT5400ADWR supports limited hot-insertion due to its specified I_off leakage (±100 µA at V_CC = 0) and output voltage tolerance (–0.5 V to 5.5 V in power-off state). However, TI does not characterize or guarantee full hot-swap compliance per IEEE 1101.10. System-level protection (e.g., series resistors, TVS diodes) remains essential. SN74ABT5400ADWR should not be used in unhardened hot-swap slots without additional circuitry.

Can SN74ABT5400ADWR drive unterminated 50-Ω transmission lines directly?

No. While SN74ABT5400ADWR integrates 25-Ω series resistors, this matches only the source end of a 50-Ω line-not full termination. For optimal signal integrity on 50-Ω PCB traces longer than ~2 inches, a 50-Ω parallel termination at the far end is still required. The 25-Ω resistor reduces reflections from the driver but does not eliminate them without load-end matching. SN74ABT5400ADWR is optimized for short-to-medium bus runs with distributed loads, not point-to-point RF-style links.

What is the maximum number of SN74ABT5400ADWR devices that can share a common bus without violating fan-out limits?

Each SN74ABT5400ADWR output drives up to 12 mA, and each input presents ≤3 pF capacitance and ±1 µA DC loading. Assuming worst-case 50-pF total bus capacitance (including trace and receiver inputs), up to four SN74ABT5400ADWR devices may drive the same bus segment while maintaining t_PLH/t_PHL < 8 ns and VOL < 0.8 V. Exceeding this requires repeater staging or reduced clock frequency. SN74ABT5400ADWR's low ground bounce helps maintain margin in multi-driver configurations.

Is SN74ABT5400ADWR compatible with 3.3-V logic inputs when operated at 5 V V_CC?

Yes-SN74ABT5400ADWR accepts 3.3-V logic-high inputs safely because its absolute maximum input voltage is 7 V and its V_IH threshold is fixed at 2 V (not ratio-based). A 3.3-V signal exceeds the 2-V minimum high-level input requirement and stays within the –0.5 V to 7 V absolute rating. However, 3.3-V logic-low must remain ≤0.8 V to meet V_IL; most 3.3-V CMOS outputs satisfy this. SN74ABT5400ADWR thus enables mixed-voltage interfacing without level shifters.