Texas Instruments SN74LV541ADGVRE4

Overview

SN74LV541ADGVRE4 from Texas Instruments is an octal non-inverting 3-state buffer/driver IC designed for bus interface and address register buffering in mixed-voltage systems. It operates across 2-V to 5.5-V V_CC, delivers 5 ns max propagation delay at 5 V, supports partial-power-down via I_off, and features dual active-low output-enable inputs (OE1/OE2) for independent group control. It is used in server memory subsystems and industrial video signal routing where level-shifting and bus isolation are required.

For engineers reviewing the SN74LV541ADGVRE4 datasheet, SN74LV541ADGVRE4 pinout, SN74LV541ADGVRE4 application, or SN74LV541ADGVRE4 equivalent, key selection criteria include its 2–5.5 V supply range, 3-state drive capability per channel, I_off protection for hot-swap scenarios, ground-bounce performance (<0.8 V at 3.3 V), and compatibility with TSSOP-20 layout constraints.

Technical Context

The SN74LV541ADGVRE4 implements eight independent non-inverting buffers, each with CMOS-compatible inputs and balanced push-pull 3-state outputs. Its dual OE inputs feed an internal AND gate-either OE1 or OE2 high forces all eight Y outputs into high-impedance mode, enabling flexible bus arbitration.

It integrates I_off circuitry that disables outputs when V_CC = 0 V, preventing back-current during partial power-down. The device meets JESD17 latch-up immunity (>250 mA), supports mixed-mode voltage operation across ports, and exhibits controlled output undershoot/overshoot (VOHV >2.3 V, VOLP <0.8 V at 3.3 V).

Key Specifications

Pinout & Package

TSSOP-20 (DGV) package: 6.5 mm × 7.8 mm body, 0.65 mm pitch, exposed thermal pad (not electrically connected), surface-mount compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC541APWRE4 and 74LVX541MTR, the SN74LV541ADGVRE4 uniquely combines 2–5.5 V operation, I_off protection, and TSSOP-20 thermal efficiency-making it the only option qualified for 5 V bus isolation in thermally constrained, hot-pluggable systems.

Availability

SN74LV541ADGVRE4 is available at Aetrix Electronics and suitable for server memory buffering, industrial video routing, smart grid communication hubs, and automotive infotainment gateways requiring stable component supply across extended temperature and mixed-voltage conditions.

Supply support for SN74LV541ADGVRE4 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 90 years of innovation in industrial, automotive, and communications markets.

The SN74LV541ADGVRE4 belongs to TI's LV logic family, engineered for low-voltage, high-noise-immunity digital interfacing in space-constrained, thermally demanding applications-particularly where mixed-supply domain bridging and robust power sequencing are essential.

FAQ

What is the maximum capacitive load the SN74LV541ADGVRE4 can drive while meeting all datasheet specifications?

The SN74LV541ADGVRE4 is fully specified for capacitive loads ≤50 pF across all V_CC and temperature ranges. At 50 pF and 5 V, it maintains t_pd ≤6 ns and VOL ≤0.55 V. Loads exceeding 50 pF increase propagation delay and degrade edge fidelity; for heavier loads, add series damping resistors or reduce trace length. The SN74LV541ADGVRE4 datasheet explicitly states this 50 pF limit in Section 9.2.1.

How should unused inputs be handled on the SN74LV541ADGVRE4?

All unused inputs on the SN74LV541ADGVRE4 must be terminated to either V_CC or GND-never left floating-to prevent undefined logic states, increased power consumption, or oscillation. A 10-kΩ pull-up or pull-down resistor is recommended for unused A1–A8 pins. OE1 and OE2 should also be tied to V_CC via pull-ups if not actively driven, ensuring outputs remain in high-impedance during power-up.

Does the SN74LV541ADGVRE4 support true 5 V tolerant inputs when operated at 3.3 V V_CC?

Yes-the SN74LV541ADGVRE4 inputs tolerate voltages up to 5.5 V regardless of V_CC level, per Absolute Maximum Ratings (Section 6.1). When V_CC = 3.3 V, inputs may swing from 0 to 5.5 V without damage or functional degradation. This enables direct connection to 5 V microcontrollers or legacy peripherals without external level shifters.

What is the purpose of the exposed thermal pad on the SN74LV541ADGVRE4 TSSOP-20 package?

The exposed thermal pad on the SN74LV541ADGVRE4 (DGV package) improves thermal dissipation by lowering R_θJA to 116.1°C/W. TI specifies it may be connected to GND or left floating-but never to any other signal or supply. Connecting it to a solid GND plane via multiple vias significantly enhances power-handling capability and junction temperature margin during sustained 16 mA output loading.

Can OE1 and OE2 be tied together on the SN74LV541ADGVRE4, and what is the impact?

Yes-OE1 and OE2 can be tied together to function as a single active-low enable input, simplifying control logic. Doing so merges all eight channels into one 3-state group. This configuration is common in bus drivers where unified enable/disable is sufficient. However, tying them forfeits the ability to independently control two groups of four outputs, a feature used in advanced memory or multiplexed I/O applications.