Diodes Incorporated PI74FCT828ATS

Overview

PI74FCT828ATS from Pericom Semiconductor is a 10-bit inverting bus buffer with dual active-low output enables, 25Ω series output termination, TTL-compatible I/O, and industrial temperature range (–40°C to +85°C). It drives high-capacitance buses while presenting low input/output capacitance (CIN ≤10 pF, COUT ≤12 pF), enabling clean signal integrity in wide data/address paths carrying parity.

For engineers reviewing the PI74FCT828ATS datasheet, PI74FCT828ATS pinout, PI74FCT828ATS application, or PI74FCT828ATS equivalent, key selection criteria include propagation delay (tPLH/tPHL ≤4.4 ns at speed grade C), output enable/disable timing (tPZH ≤7.0 ns, tPHZ ≤5.7 ns), 25Ω integrated series termination, and compatibility with FAST™-series pinouts for drop-in upgrades.

Technical Context

This device implements a dual-enable, inverting 10-bit buffer architecture with hysteresis on all inputs (200 mV) and low ground bounce outputs. Its 25Ω series resistors on all Y0–Y9 outputs suppress transmission-line reflections without external termination, reducing PCB component count and layout complexity.

It operates at 5.0 V ±5%, supports TTL-level logic thresholds (VIH = 2.0 V, VIL = 0.8 V), and delivers robust drive capability (IOL = 48 mA per output) while maintaining ultra-low static current (ICC ≤500 µA) and dynamic power scalability via ICCD (0.15–0.25 mA/MHz).

Key Specifications

Pinout & Package

PI74FCT828ATS is supplied in a 24-pin 300-mil wide plastic SOIC (S package), with 0.600-inch body width and 1.27 mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit inverting buffer applications.

Compared with 74FCT244ATSO and SN74ABT244N, PI74FCT828ATS uniquely combines 10-bit width, inverting logic, integrated 25Ω termination, and hysteresis - making it optimal for space-constrained industrial bus interfaces where signal integrity and pin compatibility with FAST™ logic are critical.

Availability

PI74FCT828ATS is available at Aetrix Electronics and suitable for memory subsystems, PCI expansion interfaces, parity bus conditioning, and legacy ISA bus expansion requiring stable component supply and long-term industrial availability.

Supply support for PI74FCT828ATS 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 FCT logic portfolio remains widely deployed in industrial and communications infrastructure.

The PI74FCT series targets high-performance 5 V logic interfacing, emphasizing speed, low noise, and compatibility with legacy bipolar FAST™ logic - specifically engineered for bus buffering in telecom, storage, and industrial control systems.

FAQ

Is PI74FCT828ATS pin-compatible with standard FAST™ logic devices?

Yes - PI74FCT828ATS maintains identical pinout and footprint with industry-standard 24-pin FAST™ 10-bit buffers (e.g., AM25LS22, SN74F244 variants), enabling direct replacement without PCB redesign. Its 25Ω series termination and lower power consumption provide functional and electrical improvements over original bipolar parts.

Can PI74FCT828ATS operate at 3.3 V?

No - PI74FCT828ATS is specified only for 5.0 V ±5% operation. Its TTL-compatible input thresholds (VIH = 2.0 V, VIL = 0.8 V) and internal design require VCC = 4.75–5.25 V. For 3.3 V systems, consider Diodes' PI74AVC series or TI's SN74LVC244A with appropriate level translation.

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

OE1 and OE2 are NAND-ed internally: both must be LOW to enable outputs. This configuration allows flexible control - e.g., one OE can be tied to a global bus enable, the other to a local chip-select - providing hierarchical bus arbitration without external logic gates.

Does the 25Ω series resistor affect DC voltage levels or fan-out capability?

No - the 25Ω resistor is placed between the internal output driver and the pin, so DC output voltages (VOH ≥2.4 V, VOL ≤0.5 V) and fan-out (driving 10 LSTTL loads) meet standard FCT specifications. The resistor only affects AC signal integrity by damping reflections on transmission lines.