Texas Instruments SN74ABT241ADBR

Overview

SN74ABT241ADBR from Texas Instruments is an octal noninverting buffer/driver with 3-state outputs, designed for memory address and bus-oriented applications. It operates from 4.5 V to 5.5 V, delivers ±32 mA high-drive output capability, features low ground bounce (<1 V typical), and is rated for –40°C to 85°C industrial temperature range.

For engineers reviewing the SN74ABT241ADBR datasheet, SN74ABT241ADBR pinout, SN74ABT241ADBR application, or SN74ABT241ADBR equivalent, key selection criteria include 3-state bus driving capability, TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V), propagation delay ≤4.6 ns (tPLH/tPHL), and SSOP-20 package compatibility with high-density PCB layouts.

Technical Context

This device implements two independent 4-bit noninverting buffer sections (1A→1Y and 2A→2Y), each controlled by a dedicated active-low 3-state enable input (1OE, 2OE). Its EPIC-II^B BiCMOS process enables high-speed switching while reducing power dissipation versus standard bipolar TTL.

Each output supports symmetrical drive strength: –32 mA IOH at VOH ≥2 V and 64 mA IOL at VOL ≤0.55 V under VCC = 4.5 V. Input clamp current exceeds –18 mA, and latch-up performance exceeds 500 mA per JEDEC JESD-17.

Key Specifications

Pinout & Package

SN74ABT241ADBR uses a 20-pin Shrink Small-Outline Package (SSOP-DB) with 0.65 mm lead pitch, 7.4 mm × 5.0 mm body size, and 2.0 mm max height. Pin 1 is located at the top-left corner with index marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ABT240ADBR and SN74LVC244APWR, SN74ABT241ADBR uniquely combines 5 V TTL compatibility, noninverting logic, and high-current drive in a compact SSOP-20 package-making it optimal for legacy industrial bus interfaces requiring robust signal integrity.

Availability

SN74ABT241ADBR is available at Aetrix Electronics and suitable for memory address buffering, system bus transceivers, clock distribution networks, and industrial I/O expansion requiring stable component supply and long-term industrial temperature operation.

Supply support for SN74ABT241ADBR 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 specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.

The ABT logic family-including SN74ABT241ADBR-is engineered for high-speed, high-drive 5 V TTL-compatible bus interfacing in industrial control, test equipment, and legacy computing systems.

FAQ

What is the maximum operating voltage for SN74ABT241ADBR?

The absolute maximum supply voltage for SN74ABT241ADBR is 7 V, but its recommended operating range is strictly 4.5 V to 5.5 V. Operation outside this window may cause unreliable logic behavior or accelerated wear. All electrical characteristics-including VOH, VOL, and timing-are specified only within the 4.5–5.5 V range, and SN74ABT241ADBR must be powered within these limits for guaranteed compliance with datasheet performance.

Does SN74ABT241ADBR support hot insertion or live bus swapping?

SN74ABT241ADBR is not explicitly rated for hot insertion. While its 3-state outputs and high latch-up immunity (>500 mA) provide some robustness, the device lacks bus-hold or Ioff partial-power-down protection. For safe live insertion, external series resistors and controlled enable sequencing are required. SN74ABT241ADBR should be enabled only after VCC stabilization and disabled before power removal to prevent backfeeding or undefined states.

How does the dual OE architecture of SN74ABT241ADBR improve system design?

The dual active-low OE inputs (1OE and 2OE) in SN74ABT241ADBR allow independent control of two 4-bit buffer groups, enabling selective bus segmentation without external gating logic. This reduces component count and PCB area in systems where subsets of data lines require separate timing or isolation-such as separating address and control lines in memory controllers. SN74ABT241ADBR thus simplifies timing-critical designs while maintaining full 8-bit throughput capability.

Can SN74ABT241ADBR drive a 50 pF load at 20 MHz without signal degradation?

Yes-SN74ABT241ADBR is characterized for CL = 50 pF and achieves tPLH/tPHL ≤4.6 ns at 5 V/25°C, supporting reliable 20 MHz square-wave operation. Its –32 mA/64 mA drive strength ensures fast edge rates and minimal rise/fall time degradation. However, layout best practices-short traces, local VCC/GND decoupling, and proper termination-must be followed. SN74ABT241ADBR performance remains valid up to 85°C, though timing increases slightly at temperature extremes.

What is the pin 1 marking and orientation for SN74ABT241ADBR in SSOP-DB packaging?

SN74ABT241ADBR in SSOP-DB packaging uses a standard pin-1 index area at the top-left corner of the package, marked by a small circular indentation or beveled edge. The device is oriented with pin 1 in quadrant Q1 of the tape-and-reel carrier (per TI's DB0020A drawing), and the top-side marking "AB241A" is laser-etched adjacent to pin 1. Board layout must align with the 0.65 mm pitch and 7.4 mm × 5.0 mm body dimensions shown in the official DB0020A outline.