Texas Instruments SN74LVTH241PW

Overview

SN74LVTH241PW 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 two independent 4-bit channels, bus-hold circuitry on all data inputs, I_off protection, and hot-insertion support. It is used in backplane interface, memory address buffering, and system-level bus isolation applications.

For engineers reviewing the SN74LVTH241PW datasheet, SN74LVTH241PW pinout, SN74LVTH241PW application, or SN74LVTH241PW equivalent, key selection considerations include its 3.3-V supply compatibility with 5-V I/O tolerance, bus-hold functionality eliminating external resistors, I_off and power-up 3-state for hot-swap safety, and TSSOP-20 packaging suitable for space-constrained PCB layouts.

Technical Context

The SN74LVTH241PW implements dual 4-bit noninverting buffer architecture with separate output-enable controls (1OE, 2OE), enabling independent channel gating. Each channel passes A-inputs to Y-outputs when enabled (1OE low / 2OE high) and enters high-impedance state otherwise.

Its bus-hold circuitry actively maintains valid logic levels on undriven inputs without external pullup/pulldown resistors, while I_off and power-up 3-state prevent current backflow and bus contention during power transitions. The device operates across 2.7 V–3.6 V V_CC, supports input voltages up to 5.5 V, and meets JESD 17 latch-up (>500 mA) and JESD 22 ESD standards (2000-V HBM, 200-V MM).

Key Specifications

Pinout & Package

TSSOP-20 package (PW), 6.6 mm × 4.5 mm × 1.2 mm body, 0.65 mm lead pitch, gull-wing leads, RoHS-compliant NiPdAu finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVTH241PW, SN74LVC244APWR offers lower cost and power but sacrifices 5-V output tolerance and bus-hold; 74ALVCH162244DLR delivers higher bandwidth and density but requires redesign for 16-bit use and lacks hot-insertion safeguards.

Availability

SN74LVTH241PW is available at Aetrix Electronics and suitable for industrial control systems, telecom backplane interfaces, and memory subsystems requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for SN74LVTH241PW 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 decades of experience in high-reliability industrial and automotive-grade components.

The SN74LVTH241PW belongs to TI's LVTH logic family, engineered for robust mixed-voltage interfacing in mission-critical industrial and communications infrastructure where signal integrity, hot-swap reliability, and long-lifecycle support are essential.

FAQ

What is the maximum input voltage rating for SN74LVTH241PW?

The SN74LVTH241PW supports input voltages up to 5.5 V regardless of V_CC level, enabling safe interfacing with 5-V TTL signals while operating from a 3.3-V supply. This 5-V tolerance applies to all data and control inputs (A1–A8, 1OE, 2OE), as confirmed in the Absolute Maximum Ratings table of the SCAS352K datasheet.

Does SN74LVTH241PW require external pullup or pulldown resistors on its inputs?

No - SN74LVTH241PW integrates active bus-hold circuitry on all eight data inputs (1A1–1A4, 2A1–2A4), which maintains a valid logic state when inputs are unused or undriven. TI explicitly advises against using external pullup/pulldown resistors with this feature, as they may interfere with bus-hold operation and increase power consumption.

Can SN74LVTH241PW be used in hot-swap applications?

Yes - SN74LVTH241PW includes both I_off protection and power-up 3-state circuitry, which together prevent damaging current backflow and bus contention during live insertion or removal. These features are fully specified for hot-insertion use cases and validated per JEDEC standards, making SN74LVTH241PW suitable for modular backplane and carrier-card designs.

What is the thermal resistance (θ_JA) of SN74LVTH241PW in its TSSOP package?

The junction-to-ambient thermal resistance (θ_JA) for SN74LVTH241PW in the TSSOP-20 (PW) package is 83 °C/W, as specified in the Absolute Maximum Ratings table. This value assumes standard JEDEC 2-layer board conditions; actual thermal performance improves with increased copper pour and thermal vias beneath the exposed pad (if present) and GND connections.

How does the output-enable logic work on SN74LVTH241PW?

SN74LVTH241PW has two independent output-enable controls: 1OE (active-low) for Channel 1 and 2OE (active-high) for Channel 2. When 1OE is low, Channel 1 outputs (1Y1–1Y4) follow inputs (1A1–1A4); when 1OE is high, those outputs go high-impedance. Similarly, Channel 2 outputs (2Y1–2Y4) follow inputs (2A1–2A4) only when 2OE is high - confirmed in the Function Tables and Logic Diagram of the SCAS352K datasheet.