Texas Instruments SN74LVTH241DWR

Overview

SN74LVTH241DWR from Texas Instruments is an octal noninverting buffer/driver IC designed for 3.3-V V_CC operation with 5-V tolerant inputs and outputs, supporting mixed-mode signal interfacing between 3.3-V and 5-V systems. It features bus-hold circuitry on all data inputs, I_off support for hot insertion, and operates down to 2.7 V supply. It is used in backplane and motherboard bus interface applications requiring level translation and drive strength.

For engineers reviewing the SN74LVTH241DWR datasheet, SN74LVTH241DWR pinout, SN74LVTH241DWR application, or SN74LVTH241DWR equivalent, key selection criteria include its 3.3-V supply compatibility with 5-V I/O tolerance, bus-hold functionality eliminating external resistors, hot-insertion capability via I_off and power-up 3-state, output drive strength (64 mA sink / 32 mA source), and SOIC-20 package thermal performance (θ_JA = 58°C/W).

Technical Context

The SN74LVTH241DWR implements two independent 4-bit noninverting buffer sections, each with dedicated output-enable inputs (1OE, 2OE). When 1OE is low or 2OE is high, data passes transparently from A inputs to Y outputs; otherwise, outputs enter high-impedance state. Bus-hold circuitry actively maintains valid logic levels on undriven inputs without external pullup/pulldown resistors.

Its I_off protection disables outputs during power-down to prevent current backflow, while power-up 3-state ensures outputs remain high-Z during V_CC ramp from 0 to 1.5 V. Absolute maximum ratings include −0.5 V to 4.6 V V_CC, −0.5 V to 7 V input/output voltage range, and latch-up immunity >500 mA per JESD 17.

Key Specifications

Pinout & Package

SN74LVTH241DWR is housed in a 20-pin SOIC (DW) package with 1.27-mm lead pitch, 7.5-mm body width, and 2.65-mm maximum height. Thermal resistance θ_JA is 58°C/W, suitable for standard PCB layouts with moderate copper area.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC244APWR and SN74ALVCH16244DGGR, the SN74LVTH241DWR uniquely combines 5-V output drive, integrated bus-hold, and hot-insertion support in a compact SOIC-20 package-making it optimal for mixed-voltage backplane and modular system interfaces where reliability and component count reduction are prioritized over raw speed or channel density.

Availability

SN74LVTH241DWR is available at Aetrix Electronics and suitable for industrial backplane interfaces, embedded control bus drivers, hot-swappable module interfaces, and low-voltage test equipment buses requiring stable component supply and long-term obsolescence management.

Supply support for SN74LVTH241DWR 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 connectivity technologies, with decades of expertise in logic interface solutions.

The SN74LVTH241DWR belongs to TI's LVTH (Low-Voltage TTL-High Speed) logic family, engineered specifically for robust mixed-voltage system interfacing in industrial, telecom, and instrumentation applications demanding reliability, noise immunity, and hot-swap capability.

FAQ

What is the recommended operating voltage range for SN74LVTH241DWR?

The SN74LVTH241DWR is specified to operate from 2.7 V to 3.6 V on V_CC. It supports unregulated battery operation down to 2.7 V while maintaining full logic functionality and drive strength. Operation outside this range may result in undefined behavior or reduced noise margins, and absolute maximum V_CC is 4.6 V.

Does SN74LVTH241DWR require external pullup or pulldown resistors on its inputs?

No, SN74LVTH241DWR does not require external pullup or pulldown resistors because it integrates active bus-hold circuitry on all eight data inputs. This circuitry maintains valid logic states on undriven or floating inputs, eliminating the need for external biasing components and reducing BOM complexity.

Can SN74LVTH241DWR safely interface with 5-V logic systems?

Yes, SN74LVTH241DWR supports mixed-mode operation: its inputs and outputs are 5-V tolerant while operating from a 3.3-V supply. Inputs accept 0–5.5 V, and outputs drive to valid TTL logic levels up to 5 V, enabling direct connection to legacy 5-V peripherals without level-shifting circuitry.

How does SN74LVTH241DWR support hot insertion in modular systems?

SN74LVTH241DWR supports hot insertion via two mechanisms: I_off circuitry disables outputs when V_CC = 0 V to prevent back-current flow, and power-up 3-state holds outputs in high-impedance during V_CC ramp (0–1.5 V), avoiding bus contention. These features are fully characterized per TI's hot-insertion guidelines.

What is the thermal performance of SN74LVTH241DWR in its SOIC-20 package?

SN74LVTH241DWR in the SOIC-20 (DW) package has a junction-to-ambient thermal resistance (θ_JA) of 58°C/W under standard JEDEC test conditions. This value assumes a 1-inch² copper pad with two vias; actual board layout significantly impacts real-world thermal performance and should be validated for high-duty-cycle applications.