Diodes Incorporated PI74FCT541ATSE

Overview

PI74FCT541ATSE from Pericom Semiconductor is a fast CMOS non-inverting octal buffer/line driver with 3-state outputs, designed for high-speed bus driving in 5V TTL-compatible systems. It features dual active-low output enables (OEA/OEB), 25Ω series output resistors to suppress reflections, TTL-level inputs/outputs, and operates across –40°C to +85°C. Used in memory address buffering and system clock distribution.

For engineers reviewing the PI74FCT541ATSE datasheet, PI74FCT541ATSE pinout, PI74FCT541ATSE application, or PI74FCT541ATSE equivalent, key selection criteria include propagation delay (≤3.8 ns), output drive strength (64 mA sink), input hysteresis (200 mV), 25Ω integrated termination, and SOIC-20 package compatibility with legacy 5V bus architectures.

Technical Context

This device implements eight independent non-inverting buffers, each with dual 3-state control logic (OEA low + OEB low) enabling simultaneous output disable. All inputs are on one side of the SOIC-20 package and all outputs on the opposite side-supporting dense PCB routing and minimizing signal crosstalk.

It uses Fast CMOS process technology to achieve 5V TTL-compatible voltage thresholds (VIH = 2.0 V, VIL = 0.8 V) while delivering low static current (≤500 µA) and low ground bounce. The built-in 25Ω series resistor per output eliminates external termination in controlled-impedance 50Ω trace environments.

Key Specifications

Pinout & Package

PI74FCT541ATSE is housed in a Pb-free and Green-compliant 20-pin plastic SOIC (Small Outline Integrated Circuit) package, 300-mil wide, with standard 1.27 mm pitch and JEDEC MS-012AC footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74F541SCX and SN74ACT541N, PI74FCT541ATSE uniquely combines integrated 25Ω termination, 200 mV hysteresis, and <500 µA quiescent current-making it optimal for space-constrained, noise-sensitive 5V bus designs requiring zero-external-component signal integrity.

Availability

PI74FCT541ATSE is available at Aetrix Electronics and suitable for memory address buffering, system clock distribution, backplane data bus isolation, and legacy peripheral interface applications requiring stable component supply and long-term industrial availability.

Supply support for PI74FCT541ATSE 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

Pericom Semiconductor was a fabless provider of high-speed interface and timing solutions, acquired by Diodes Incorporated in 2016; its legacy logic portfolio remains widely deployed in industrial and communications infrastructure.

PI74FCT541ATSE belongs to the FCT (Fast CMOS TTL-compatible) logic family, engineered specifically for drop-in replacement of bipolar 74F-series devices while delivering superior speed, lower power, and enhanced signal integrity in 5V systems.

FAQ

Is PI74FCT541ATSE pin-compatible with standard 74F541 devices?

Yes, PI74FCT541ATSE uses the same SOIC-20 pinout as 74F541, including identical placement of D0–D7, O0–O7, OEA, OEB, VCC, and GND. No PCB redesign is needed for migration, and all logic functions-including dual 3-state control-are electrically identical.

Does PI74FCT541ATSE require external pull-up or pull-down resistors on enable pins?

No. OEA and OEB have TTL-compatible input thresholds (VIH = 2.0 V, VIL = 0.8 V) and negligible leakage (±1 µA), so they can be driven directly from CMOS or TTL outputs. Pull resistors are unnecessary unless floating states must be avoided during power-up.

Can PI74FCT541ATSE operate reliably at 5.5 V supply?

No. Absolute maximum VCC is +7.0 V, but DC electrical specifications are guaranteed only from 4.75 V to 5.25 V (5.0 V ±5%). Operation at 5.5 V exceeds rated conditions and may cause increased ICC, reduced noise margin, or accelerated wear-out.

What is the thermal resistance (θJA) of the SOIC-20 package for PI74FCT541ATSE?

The SOIC-20 package has a typical junction-to-ambient thermal resistance (θJA) of 90°C/W under standard JEDEC JESD51-2 conditions (single-layer copper, 1 in² pad). With 3.5 mA max ICC and 64 mA worst-case IOL, power dissipation stays below 150 mW-well within safe operating limits at +85°C ambient.