Texas Instruments SN74LV541ATPWT

Overview

SN74LV541ATPWT from Texas Instruments is an octal noninverting buffer/driver with 3-state outputs, designed for 4.5-V to 5.5-V VCC operation. It features TTL-voltage-compatible inputs, typical propagation delay of 4 ns at 5 V, and supports mixed-mode voltage translation (e.g., 3.3 V → 5 V). It is used in bus line driving and memory address register buffering.

For engineers reviewing the SN74LV541ATPWT datasheet, SN74LV541ATPWT pinout, SN74LV541ATPWT application, or SN74LV541ATPWT equivalent, key selection criteria include 3-state enable logic (dual active-low OE), Ioff partial-power-down support, output ground bounce (VOLP < 0.8 V), VOH undershoot (VOHV > 2.3 V), and thermal performance in TSSOP-20 packaging.

Technical Context

The SN74LV541ATPWT implements dual independent 3-state control via AND-gated active-low OE1 and OE2 inputs: either high forces all eight corresponding outputs into high-impedance. Its inputs accept TTL-level signals (VIH ≥ 2 V, VIL ≤ 0.8 V) while operating from a 4.5–5.5-V supply, enabling interoperability with both bipolar and 3.3-V logic families.

It integrates Ioff circuitry to disable outputs during partial power-down, preventing backflow current when VCC = 0 V. Output drive strength is ±16 mA at VCC = 4.5–5.5 V, with guaranteed VOL ≤ 0.55 V and VOH ≥ 3.8 V under load, and specified operation across –40°C to 125°C ambient temperature.

Key Specifications

Pinout & Package

TSSOP-20 package (PW), 6.5 mm × 4.4 mm × 1.2 mm max height, with exposed thermal pad (RGY variant differs; PW has no thermal pad). Pin 1 index located at top-left corner per JEDEC MO-153.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LV541ATPWT, SN74LVC541APWR enables lower-voltage operation but sacrifices 5-V compatibility, while 74ACT541SCX offers higher speed and drive at the cost of missing Ioff and mixed-mode translation-making SN74LV541ATPWT the balanced choice for industrial 5-V systems requiring robustness and flexibility.

Availability

SN74LV541ATPWT is available at Aetrix Electronics and suitable for industrial control systems, test equipment design, and legacy 5-V embedded systems requiring stable component supply and long-term lifecycle support.

Supply support for SN74LV541ATPWT 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 experience in industrial-grade interface ICs.

The SN74LV541ATPWT belongs to TI's LV-A family of low-voltage, high-speed logic devices engineered for robust 5-V operation with enhanced noise immunity and power-down safety in harsh environments.

FAQ

What is the function of OE1 and OE2 on the SN74LV541ATPWT?

The SN74LV541ATPWT uses OE1 and OE2 as active-low 3-state enable inputs. Each controls four outputs: OE1 governs Y1–Y4, OE2 governs Y5–Y8. If either is high, its associated outputs enter high-impedance mode. This dual-enable architecture allows selective bus segmentation without external logic. The internal AND gate ensures that both OE pins must be low for outputs to drive.

Does the SN74LV541ATPWT support partial power-down operation?

Yes, the SN74LV541ATPWT includes Ioff circuitry that disables outputs when VCC = 0 V, limiting Ioff to ≤5 μA. This prevents current backflow from live bus lines into a powered-down device-a critical feature for hot-swap systems and multi-rail power sequencing. The specification is validated across –40°C to 125°C and is inherent to the LV-A process technology.

Can the SN74LV541ATPWT translate 3.3-V logic to 5-V levels?

Yes, the SN74LV541ATPWT accepts 3.3-V logic inputs (VIH ≥ 2 V, VIL ≤ 0.8 V) while operating at VCC = 5 V, producing valid 5-V output levels (VOH ≥ 3.8 V, VOL ≤ 0.55 V). This mixed-mode capability is explicitly documented in the datasheet and requires no external components-making it suitable for bridging 3.3-V FPGAs or MCUs to 5-V peripherals.

What is the maximum capacitive load the SN74LV541ATPWT can drive reliably?

The SN74LV541ATPWT is characterized up to CL = 50 pF in switching tests, with tpd = 5.5 ns (typ) and tdis = 8.8 ns (typ) at VCC = 5 V. While not explicitly rated beyond 50 pF, its ±16-mA drive strength supports heavier loads in DC-coupled applications; for >50-pF AC loads, layout optimization (short traces, ground planes) and slew-rate limiting may be needed to maintain signal integrity.

Is the SN74LV541ATPWT pin-compatible with other TSSOP-20 octal buffers?

No-SN74LV541ATPWT has a specific pinout optimized for PCB layout (inputs on one side, outputs on the opposite side), differing from alternatives like SN74LVC541APWR (same function but different pin mapping). Always verify against the exact package drawing (PW0020A) and avoid assumptions; mismatched pinouts risk functional failure or damage during board bring-up.