Texas Instruments SN74ABT2241DWR

Overview

SN74ABT2241DWR from Texas Instruments is an octal noninverting buffer/line driver with 3-state outputs, designed for memory address and bus driving applications. It operates from 4.5 V to 5.5 V, sinks up to 12 mA per output, features integrated 25-Ω series output resistors, and is rated for –40°C to 85°C operation in a 20-pin SOIC (DW) package.

For engineers reviewing the SN74ABT2241DWR datasheet, SN74ABT2241DWR pinout, SN74ABT2241DWR application, or SN74ABT2241DWR equivalent, this page delivers verified electrical specs, true pin functionality, real-world use cases in bus buffering and clock distribution, and validated alternative parts for design continuity.

Technical Context

This device integrates two independent 4-bit noninverting buffer sections (1A→1Y and 2A→2Y), each controlled by active-low 3-state enable inputs (1OE and 2OE). Its EPIC-II^B BiCMOS architecture enables high-speed switching (t_PLH/t_PHL ≤ 4.7 ns at V_CC = 5 V, C_L = 50 pF) while reducing power dissipation versus standard TTL.

The outputs incorporate on-die 25-Ω series termination to suppress overshoot/undershoot without external components. Input thresholds are TTL-compatible (V_IL = 0.8 V, V_VIH = 2 V), and the device supports hot-insertion via controlled I_OFF (±100 µA at V_CC = 0) and high-impedance state assurance during power sequencing.

Key Specifications

Pinout & Package

SN74ABT2241DWR is housed in a 20-pin SOIC (DW) package (7.5 mm × 12.8 mm, 2.65 mm max height), RoHS-compliant, with NIPDAU lead finish and JEDEC MS-013 registration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ABT244N and SN74LVC244APWR, SN74ABT2241DWR uniquely provides independent dual-group 3-state control and on-die 25-Ω termination in a 5-V industrial temperature grade - critical for maintaining signal integrity in retrofitted or mixed-voltage bus systems without layout changes.

Availability

SN74ABT2241DWR is available at Aetrix Electronics and suitable for industrial control panels, legacy instrumentation upgrades, and 5-V FPGA carrier board designs requiring stable component supply and long-term obsolescence mitigation.

Supply support for SN74ABT2241DWR 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, with over 50 years of innovation in industrial and automotive electronics.

The SN74ABT2241DWR belongs to TI's ABT logic family, engineered specifically for high-speed, low-noise 5-V bus interfacing in mission-critical industrial and computing infrastructure.

FAQ

What is the maximum output sink current rating for SN74ABT2241DWR?

The SN74ABT2241DWR is rated to sink up to 12 mA per output (I_OL) under recommended operating conditions (V_CC = 4.5 V to 5.5 V, T_A = –40°C to 85°C). This value is guaranteed across all eight outputs simultaneously and supports direct drive of TTL loads, LEDs, and short PCB traces without external current-limiting components. The SN74ABT2241DWR maintains this rating while incorporating internal 25-Ω series resistors to manage edge rates and reduce EMI.

Does SN74ABT2241DWR require external pull-up resistors on its OE pins?

Yes - to ensure a defined high-impedance state during power-up or power-down, OE pins (1OE and 2OE) must be tied to V_CC through a pull-up resistor. The minimum resistance is determined by the current-sinking capability of the driving source; TI recommends ≥1 kΩ for typical microcontroller GPIOs. Leaving OE floating risks undefined output states and potential bus contention. The SN74ABT2241DWR does not include internal pull-ups, making external biasing mandatory for robust system operation.

Can SN74ABT2241DWR be used in place of SN74ABT2240 or SN74ABT2244A?

No - SN74ABT2241DWR is functionally distinct: it provides two groups of noninverting buffers (1A→1Y, 2A→2Y), whereas SN74ABT2240 offers inverting outputs and SN74ABT2244A combines inverting and noninverting outputs in one package. Pinouts differ significantly across these variants, and OE logic polarity is consistent but grouping is not interchangeable. Substituting SN74ABT2241DWR for either part would require schematic and layout changes. Always verify logic polarity and pin mapping before replacement.

What is the thermal resistance (θ_JA) of SN74ABT2241DWR in its DW package?

The junction-to-ambient thermal resistance (θ_JA) for SN74ABT2241DWR in the SOIC (DW) package is 97°C/W, measured per JEDEC JESD51 standards on a standard 4-layer test board. This value assumes proper PCB copper pour (≥1 in² per side) under the package and adequate airflow. At full output loading (12 mA × 8 outputs), power dissipation remains below 300 mW, allowing reliable operation up to 85°C ambient without forced cooling. The SN74ABT2241DWR's EPIC-II^B process further reduces dynamic heating versus older TTL families.

Is SN74ABT2241DWR compatible with 3.3-V input logic levels?

No - SN74ABT2241DWR is a 5-V-only device with TTL-compatible input thresholds (V_IL = 0.8 V, V_IH = 2.0 V). While 3.3-V logic outputs may exceed V_IH marginally under ideal conditions, voltage tolerances, noise margins, and process variation make reliable interfacing uncertain. For mixed-voltage systems, use a dedicated level translator (e.g., TXB0108) or select a 3.3-V–tolerant alternative like SN74LVC244A. The SN74ABT2241DWR is not specified or characterized for 3.3-V input operation.