Texas Instruments SN74LVTH541DWR

Overview

SN74LVTH541DWR 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 eight data inputs, I_off protection for hot insertion, and operates down to 2.7 V supply. It is used in memory address buffering and bus line driving applications.

For engineers reviewing the SN74LVTH541DWR datasheet, SN74LVTH541DWR pinout, SN74LVTH541DWR application, or SN74LVTH541DWR equivalent, this page delivers verified electrical specs, SOIC-20 package layout, bus-hold behavior, hot-swap capability, and direct alternatives for 3.3-V/5-V level translation in industrial control and embedded bus architectures.

Technical Context

The SN74LVTH541DWR implements TTL-compatible output drive with LVCMOS input thresholds, enabling seamless interface across voltage domains. Its dual 3-state enable logic uses a 2-input AND gate with active-low inputs - either OE1 or OE2 high forces all eight Y outputs into high-impedance state.

Bus-hold circuitry actively maintains valid logic levels on undriven A1–A8 inputs without external resistors, while I_off and power-up 3-state functionality prevent backflow current and bus contention during hot insertion or power sequencing. Latch-up immunity exceeds 500 mA per JESD 17.

Key Specifications

Pinout & Package

SN74LVTH541DWR is housed in a 20-pin SOIC (DW) package measuring 7.5 mm × 12.8 mm × 2.65 mm (max height), RoHS-compliant with NiPdAu lead finish and moisture sensitivity level (MSL) 1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVTH541DWR, SN74LVC541APW lacks 5-V tolerance and bus-hold but offers wider V_CC flexibility, while 74ALVC541MTCX improves speed at the expense of hot-swap safety and input stabilization - making SN74LVTH541DWR uniquely suited for mixed-voltage, field-serviceable systems.

Availability

SN74LVTH541DWR is available at Aetrix Electronics and suitable for industrial control interfaces, memory subsystem buffering, and hot-swappable module backplanes requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for SN74LVTH541DWR 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, automotive, and communications markets.

The SN74LVTH541DWR belongs to TI's LVTH logic family, engineered specifically for robust 3.3-V/5-V mixed-signal interfacing in mission-critical industrial and telecom infrastructure where reliability under voltage transients and hot-swap conditions is essential.

FAQ

What is the maximum input voltage the SN74LVTH541DWR can tolerate?

The SN74LVTH541DWR supports an input voltage range of −0.5 V to 7 V, allowing direct connection of 5-V TTL signals to its A1–A8 inputs while operating from a 3.3-V V_CC. This eliminates the need for external level-shifting circuitry in mixed-voltage systems and is confirmed in the Absolute Maximum Ratings table of the SCBS682G datasheet.

Does the SN74LVTH541DWR require external pullup resistors on its inputs?

No - the SN74LVTH541DWR integrates bus-hold circuitry on all eight data inputs (A1–A8), which actively maintains valid logic states on undriven or floating inputs. Using external pullup or pulldown resistors with bus-hold is explicitly discouraged in the datasheet, as it may cause excessive current draw or logic instability.

Can the SN74LVTH541DWR be used in hot-insertion applications?

Yes - the SN74LVTH541DWR is fully specified for hot-insertion use via two key features: I_off circuitry disables outputs when V_CC = 0 V to prevent backflow current, and power-up 3-state forces outputs into high-impedance during power ramp-up (0–1.5 V), avoiding bus contention. These capabilities are validated per JESD 17 latch-up and JEDEC hot-swap guidelines.

What is the thermal performance of the SN74LVTH541DWR in its SOIC-20 package?

The SN74LVTH541DWR in the SOIC (DW) package has a junction-to-ambient thermal impedance (θ_JA) of 58°C/W, measured per JESD 51-7. This value assumes standard JEDEC 2-layer board conditions and enables reliable operation up to 85°C ambient when dissipating ≤150 mW - consistent with its typical ICC of 0.19 mA in 3-state mode and 5 mA under active drive.

How does the dual-output-enable logic work on the SN74LVTH541DWR?

The SN74LVTH541DWR uses a 2-input AND gate with active-low enables: OE1 and OE2. If either OE1 or OE2 is driven high, all eight Y outputs enter high-impedance state. Only when both OE1 and OE2 are low do the outputs follow their respective A inputs. This architecture supports flexible bus arbitration schemes using separate control signals for redundancy or partitioned access.