Texas Instruments SN74LVC541ADGVR

Overview

SN74LVC541ADGVR from Texas Instruments is an octal non-inverting buffer with 3-state outputs, designed for bus interface and signal redriving in 1.65V–3.6V systems. It features dual active-low output enables (OE1/OE2), 5.1ns max propagation delay at 3.3V, 5.5V-tolerant inputs, and Ioff support for live insertion-used in high-speed PCB trace buffering and controller reset hold applications.

For engineers reviewing the SN74LVC541ADGVR datasheet, SN74LVC541ADGVR pinout, SN74LVC541ADGVR application, or SN74LVC541ADGVR equivalent, key selection criteria include 3-state timing (ten/tdis ≤7ns), mixed-mode voltage compatibility (5V inputs into 3.3V VCC), thermal performance in TSSOP-20 (RθJA = 120.3°C/W), and latch-up immunity (>100mA per JESD78).

Technical Context

The SN74LVC541ADGVR implements eight independent CMOS buffer channels sharing two active-low enable inputs (OE1 and OE2), both of which must be asserted low to activate outputs-enabling synchronous bus control. Its balanced 3-state outputs drive high/low or enter high-impedance mode without leakage beyond ±10μA (Ioff) when VCC = 0V.

It supports mixed-voltage operation: inputs tolerate up to 5.5V regardless of VCC (1.65V–3.6V), allowing interfacing between 5V legacy logic and 3.3V domains. Ground bounce (VOLP < 0.8V) and VOH undershoot (VOHV > 2V) are characterized at 3.3V/25°C, confirming signal integrity under fast switching.

Key Specifications

Pinout & Package

TSSOP-20 package (PW), 6.5mm × 6.4mm body size, 0.65mm pitch, thermal pad optional (GND or floating).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC541ADGVR, 74LVC541APWRE4 offers identical performance in a functionally equivalent package, while SN74LVCH16244ADGGR provides double the channel count at the cost of larger footprint and layout change-making SN74LVC541ADGVR optimal for space-constrained 8-bit bus isolation.

Availability

SN74LVC541ADGVR is available at Aetrix Electronics and suitable for industrial I/O modules, embedded controller interfaces, and automotive body electronics requiring stable component supply and long-term lifecycle support.

Supply support for SN74LVC541ADGVR 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 delivering analog and embedded processing solutions, with over 90 years of innovation in logic, power, and signal chain technologies.

The SN74LVC541ADGVR belongs to TI's LVC logic family-designed specifically for low-voltage, high-speed, mixed-signal interfacing in space- and power-constrained applications such as portable instrumentation and industrial automation.

FAQ

What is the maximum operating temperature range for SN74LVC541ADGVR?

The SN74LVC541ADGVR is rated for operation from –40°C to +125°C ambient temperature. This extended industrial range ensures reliable performance in harsh environments such as motor control enclosures and under-hood automotive modules. The device's thermal metrics-including RθJA = 120.3°C/W in TSSOP-20-are validated across this full range, and its DC/AC specifications (e.g., tpd ≤5.6ns at 125°C/3.3V) remain guaranteed per the datasheet.

Does SN74LVC541ADGVR support 5V logic inputs when powered at 3.3V?

Yes, SN74LVC541ADGVR supports input voltages up to 5.5V regardless of VCC level (1.65V–3.6V). This 5V-tolerant input capability is explicitly specified in the Recommended Operating Conditions table and enables direct interfacing with 5V microcontrollers, FPGAs, or legacy peripherals without external level shifters-reducing design complexity and bill-of-materials cost.

How do the dual output enable pins (OE1 and OE2) function on SN74LVC541ADGVR?

On SN74LVC541ADGVR, both OE1 and OE2 must be driven low simultaneously to enable all eight outputs; if either is high, all outputs enter high-impedance state. This AND-gated enable logic ensures fail-safe bus isolation and allows coordinated control via a single system-level signal routed to both pins-or independent control for phased activation in multi-stage designs.

Can SN74LVC541ADGVR drive a 50pF capacitive load while meeting timing specs?

Yes, SN74LVC541ADGVR is fully characterized to drive loads ≤50pF while maintaining guaranteed timing performance-including tpd ≤5.1ns at 3.3V/25°C and ten/tdis ≤7ns. The datasheet explicitly states this 50pF limit in Section 8.2.1.1, and exceeding it may degrade propagation delay, increase ground bounce, or violate setup/hold margins in high-speed interfaces.

Is SN74LVC541ADGVR pin-compatible with older 74LS541 devices?

No, SN74LVC541ADGVR is not pin-compatible with 74LS541. While both are octal 3-state buffers, SN74LVC541ADGVR uses a 20-pin TSSOP package (DGVR suffix) with different pin assignments-including dual OE inputs (pins 1 and 19), VCC at pin 20, and GND at pin 10-whereas 74LS541 uses 20-pin PDIP/SOIC with single OE and different pinout. Direct replacement requires PCB redesign.