Texas Instruments SN74LS241DWR

Overview

SN74LS241DWR from Texas Instruments is an octal non-inverting buffer/line driver with dual 4-bit channels, 3-state outputs, and active-low output-enable inputs (1G, 2G/2G). It operates at 5 V, delivers 24 mA sink current per output, achieves 18 ns max propagation delay, and features PNP inputs with 400-mV noise margin - used in memory address buffering and bus driving applications.

For engineers reviewing the SN74LS241DWR datasheet, SN74LS241DWR pinout, SN74LS241DWR application, or SN74LS241DWR equivalent, key selection criteria include its dual-channel 3-state control, LS logic compatibility, 24 mA output drive capability, 18 ns tPHL/tPLH timing, and SOIC-20 package footprint for space-constrained PCB layouts.

Technical Context

The SN74LS241DWR implements two independent 4-bit non-inverting buffers, each with dedicated active-low output-enable (1G for Channel 1, 2G/2G for Channel 2). Outputs enter high-impedance state when respective G inputs are high, enabling bidirectional bus isolation without external direction control logic.

It uses Schottky-clamped TTL (LS) technology with PNP input stages to reduce DC loading on driven buses and built-in input hysteresis (0.2–0.4 V) to improve noise immunity. Input tolerance down to 2 V allows interoperability with 3.3-V logic sources in mixed-voltage systems.

Key Specifications

Pinout & Package

SN74LS241DWR is housed in a 20-pin SOIC (DW) package measuring 12.80 mm × 7.50 mm, optimized for automated assembly and thermal performance (RθJA = 90.3°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LS240DWR and SN74LS244DWR, SN74LS241DWR uniquely provides non-inverting logic *and* dual independent output enables - enabling precise timing control of two data groups without added logic or layout complexity.

Availability

SN74LS241DWR is available at Aetrix Electronics and suitable for memory address buffering, system bus repeaters, LED display row driving, and I/O expansion interfaces requiring stable component supply across extended production lifecycles.

Supply support for SN74LS241DWR 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 specializing in analog, embedded processing, and logic ICs, with over 50 years of leadership in TTL and advanced logic families.

SN74LS241DWR belongs to TI's legacy LS-series logic portfolio, designed specifically to enhance density and performance of three-state memory address drivers, clock distribution networks, and bus-oriented receivers in industrial and computing systems.

FAQ

What is the maximum operating temperature range for SN74LS241DWR?

The SN74LS241DWR is rated for commercial operation from 0°C to +70°C ambient temperature. This range is defined under Recommended Operating Conditions in the official datasheet and applies to the SOIC (DW) package variant. Operation outside this range may result in degraded timing, increased ICC, or failure to meet VOH/VOL specifications.

Does SN74LS241DWR support 3.3-V logic inputs?

Yes, SN74LS241DWR accepts 3.3-V logic inputs reliably: its VIH specification is 2.0 V minimum, and it tolerates input voltages down to 2 V while maintaining full LS-family functionality. This allows direct connection to 3.3-V microcontrollers without level-shifting circuitry, though VCC must remain at 5 V.

How does the dual output-enable architecture of SN74LS241DWR differ from SN74LS244DWR?

SN74LS241DWR provides two independent active-low enables (1G and 2G/2G), allowing separate control of its two 4-bit channels. In contrast, SN74LS244DWR has a single G input controlling all eight outputs simultaneously. This makes SN74LS241DWR suitable for applications requiring staggered or isolated channel activation, such as time-multiplexed bus segments.

What is the typical propagation delay for SN74LS241DWR at 5 V?

The typical propagation delay (tPLH/tPHL) for SN74LS241DWR is 14 ns at VCC = 5 V and TA = 25°C, with a maximum of 18 ns across the full operating range. These values are measured under standard load conditions (RL = 667 Ω, CL = 45 pF) and reflect worst-case performance for timing budgeting in synchronous bus designs.

Can SN74LS241DWR drive terminated transmission lines?

Yes, SN74LS241DWR is explicitly characterized to drive terminated lines down to 133 Ω, as stated in the device description. Its 24 mA output sink capability and LS-family edge rates make it suitable for short-haul, impedance-controlled traces in backplanes or dense PCB interconnects where signal integrity is critical.