Texas Instruments SN74LVTH541PWR

Overview

SN74LVTH541PWR from Texas Instruments is an octal 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 logic and legacy 5-V systems. It features dual active-low 3-state enable inputs (OE1/OE2), bus-hold circuitry on all data inputs, I_off protection, and operates down to 2.7 V for unregulated battery applications. It is commonly used in memory address buffering and bus line driving in industrial control and embedded computing.

For engineers reviewing the SN74LVTH541PWR datasheet, SN74LVTH541PWR pinout, SN74LVTH541PWR application, or SN74LVTH541PWR equivalent, key selection considerations include its 20-pin TSSOP package, 3.3-V supply compatibility with 5-V I/O tolerance, bus-hold functionality eliminating external resistors, hot-insertion support via I_off and power-up 3-state, and propagation delay under 4 ns at 3.3 V.

Technical Context

The SN74LVTH541PWR implements eight noninverting buffers with independent input and output sides of the package to simplify PCB layout. Its 2-input AND gate logic for the 3-state control ensures outputs enter high-impedance state if either OE1 or OE2 is high - enabling flexible bus arbitration and multi-driver sharing.

Bus-hold circuitry actively maintains valid logic levels on undriven or floating data inputs without external pullup/pulldown resistors, reducing BOM count and board space. The device meets JESD 17 latch-up immunity (>500 mA) and exceeds JESD 22 ESD ratings (2000-V HBM, 200-V MM), making it suitable for rugged industrial environments.

Key Specifications

Pinout & Package

TSSOP-20 package (PW), 4.4 mm × 6.5 mm body, 1.2 mm max height, 0.65 mm lead pitch, exposed pad not present, 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 SN74LVTH541PWR, SN74LVC541APWR offers lower static power but lacks 5-V output drive and bus-hold, while 74ALVC541PW provides input-only 5-V tolerance and no output-level translation - both require design compromises in mixed-voltage bus interfacing where SN74LVTH541PWR delivers full functional equivalence.

Availability

SN74LVTH541PWR is available at Aetrix Electronics and suitable for industrial PLC backplanes, embedded memory subsystems, automated test equipment signal routing, and communications baseband I/O expansion requiring stable component supply and long-term manufacturability.

Supply support for SN74LVTH541PWR 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 expertise in industrial, automotive, and communications markets.

The SN74LVTH541PWR belongs to TI's LVTH logic family, engineered specifically for robust 3.3-V system interfacing with legacy 5-V infrastructure - emphasizing mixed-voltage reliability, hot-swap safety, and reduced external component count.

FAQ

What is the maximum input voltage rating for SN74LVTH541PWR?

The SN74LVTH541PWR supports input voltages up to 5.5 V across the full operating temperature range, enabling direct connection to 5-V TTL signal sources without external clamping or level-shifting circuitry. This specification is explicitly guaranteed in the Absolute Maximum Ratings table and confirmed in the Recommended Operating Conditions section of the official datasheet SCBS682G.

Does SN74LVTH541PWR support hot insertion?

Yes, SN74LVTH541PWR supports hot insertion through two integrated features: I_off circuitry disables outputs when V_CC = 0 V to prevent backflow current, and power-up 3-state ensures outputs remain in high-impedance during power ramp-up/down. These capabilities are validated per JESD 17 latch-up testing and documented in the device description and Electrical Characteristics sections.

What is the function of the dual OE inputs (OE1 and OE2) on SN74LVTH541PWR?

The SN74LVTH541PWR uses OE1 and OE2 as active-low enable inputs wired to a 2-input AND gate: if either OE1 or OE2 is high, all eight outputs (Y1–Y8) enter high-impedance state. This allows flexible bus arbitration - for example, OE1 can serve as global enable while OE2 acts as local channel select - and is verified in the FUNCTION TABLE and logic diagram of the SCBS682G datasheet.

Can SN74LVTH541PWR operate below 3.3 V?

Yes, SN74LVTH541PWR is fully specified from 2.7 V to 3.6 V V_CC. Its recommended operating conditions guarantee performance including VOL ≤ 0.55 V, VOH ≥ 2.0 V, and t_PD ≤ 3.9 ns at V_CC = 2.7 V, making it suitable for brown-out resilient designs and unregulated battery-powered systems.

Is bus-hold functionality enabled by default on SN74LVTH541PWR inputs?

Yes, bus-hold circuitry is permanently integrated on all eight data inputs (A1–A8) of SN74LVTH541PWR and requires no external configuration or enable signal. It actively maintains the last-valid logic state when inputs float, with ±500 µA dynamic hold current specified at V_CC = 3.6 V - details are provided in the Electrical Characteristics table under II(hold).