Texas Instruments SN74LV541APWRG4

Overview

SN74LV541APWRG4 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 network switch data paths.

For engineers reviewing the SN74LV541APWRG4 datasheet, SN74LV541APWRG4 pinout, SN74LV541APWRG4 application, or SN74LV541APWRG4 equivalent, key selection criteria include its 20-pin TSSOP package, 3.3-V/5-V mixed-mode voltage tolerance, ±16-mA output drive capability, I_off protection for hot-swap scenarios, and guaranteed 125°C operation.

Technical Context

The SN74LV541APWRG4 implements eight independent non-inverting buffers, each with CMOS-compatible input thresholds and balanced push-pull outputs capable of sourcing and sinking up to 16 mA at 5 V. Its dual active-low OE inputs feed a shared AND logic gate - enabling high-impedance state when either OE is high.

It integrates I_off circuitry that disables all outputs during power-down, limiting backflow current to ≤5 µA per terminal. Ground bounce (V_OLP) and undershoot (V_OHV) are characterized at <0.8 V and >2.3 V respectively under 3.3-V operation, supporting clean signal integrity in dense PCB layouts.

Key Specifications

Pinout & Package

TSSOP-20 (PW) package: 6.5 mm × 7.8 mm body, 0.65 mm lead pitch, exposed thermal pad (RKS variant only), 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 SN74LV541APWRG4, SN74LVC541APWR trades 5-V compatibility for faster 3.3-V performance, while 74LVX541MTCX sacrifices temperature rating and I_off robustness for lower unit cost - making SN74LV541APWRG4 the optimal choice for industrial-grade mixed-voltage designs requiring full-spec reliability.

Availability

SN74LV541APWRG4 is available at Aetrix Electronics and suitable for server memory subsystems, industrial network switches, smart grid RTUs, and surveillance camera SoC interfaces requiring stable component supply across extended temperature and mixed-voltage conditions.

Supply support for SN74LV541APWRG4 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 high-reliability interface ICs.

The SN74LV541APWRG4 belongs to TI's LV family of low-voltage logic devices engineered for robust mixed-signal interfacing in industrial, communications, and computing infrastructure equipment.

FAQ

What is the maximum operating temperature for SN74LV541APWRG4?

The SN74LV541APWRG4 is fully specified from –40°C to +125°C ambient temperature. This rating is validated per JEDEC JESD22-A108 and applies across the full 2-V to 5.5-V V_CC range. Thermal metrics such as R_θJA = 128.2°C/W (TSSOP-20) confirm safe junction temperatures under typical industrial airflow conditions when driving 16-mA loads.

Does SN74LV541APWRG4 support 5-V tolerant inputs?

Yes, SN74LV541APWRG4 supports input voltages up to 5.5 V regardless of V_CC level - a feature explicitly documented in Section 6.1 (Absolute Maximum Ratings) and Section 6.3 (Recommended Operating Conditions). This allows direct connection of 5-V signals to A1–A8 when V_CC is set to 3.3 V, eliminating external level shifters in mixed-voltage systems.

How should unused inputs be terminated on SN74LV541APWRG4?

All unused inputs (A1–A8, OE1, OE2) on SN74LV541APWRG4 must be tied to either V_CC or GND - floating inputs are prohibited. TI recommends 10-kΩ pull-up or pull-down resistors for unused pins to ensure defined logic states, prevent oscillation, and minimize static current. Direct connection is acceptable if the signal source is permanently inactive.

What is the purpose of the dual OE inputs (OE1 and OE2) on SN74LV541APWRG4?

The dual active-low OE inputs (OE1 and OE2) on SN74LV541APWRG4 feed an internal AND gate - meaning outputs go high-impedance if *either* OE is high. This architecture allows flexible grouping: for example, OE1 can control Y1–Y4 while OE2 controls Y5–Y8 via external logic, enabling selective bus segmentation without additional gating components.

Can SN74LV541APWRG4 drive a 50-pF load while meeting timing specs?

Yes, SN74LV541APWRG4 is fully characterized for C_L = 50 pF across all V_CC levels (2.5 V, 3.3 V, 5 V) and temperature ranges. Section 6.6–6.8 specifies t_pd, t_en, and t_dis values under 50-pF loading - e.g., 8 ns max t_pd at 5 V. Exceeding 50 pF degrades timing but does not damage the device; layout optimization is recommended for heavier loads.