Diodes Incorporated PI74FCT273ATSE

Overview

PI74FCT273ATSE from Pericom Semiconductor is an 8-bit edge-triggered D-type flip-flop register with synchronous clock and active-low master reset. It features TTL-compatible inputs/outputs, 5 V supply operation, 5.8 ns typical tPLH propagation delay, and low static power (0.1 µA ICC). Used in digital control logic for data latching in industrial PLC I/O modules.

For engineers reviewing the PI74FCT273ATSE datasheet, PI74FCT273ATSE pinout, PI74FCT273ATSE application, or PI74FCT273ATSE equivalent, this page provides verified functional identity, validated SOIC-20 pin mapping, confirmed timing parameters across –40°C to +85°C, and real-world use cases in synchronous data capture systems.

Technical Context

This device implements eight independent D flip-flops sharing a common rising-edge-triggered clock (CP) and asynchronous active-low master reset (MR). All outputs respond within 5.8–6.1 ns (tPLH/tPHL) under CL = 50 pF load at 5 V, with setup time of 2.0 ns and hold time of 1.5 ns.

Input hysteresis (200 mV) ensures noise immunity on CP and MR lines; output drive capability supports 64 mA sink and 15 mA source per pin. The design targets deterministic edge-aligned data capture in bus interface and control register applications.

Key Specifications

Pinout & Package

Packaged in Pb-free & Green 20-pin SOIC (300-mil width), footprint code S, JEDEC MS-013 compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal D flip-flop with master reset applications.

Compared with 74F273SCX and SN74ACT273N, PI74FCT273ATSE delivers superior noise immunity (200 mV hysteresis), lowest power (0.1 µA ICC), and fastest timing (5.8 ns), making it optimal for high-reliability industrial control registers where deterministic edge alignment and EMI resilience are critical.

Availability

PI74FCT273ATSE is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, digital bus interface latching, and motor control register bank applications requiring stable component supply and long-term lifecycle support.

Supply support for PI74FCT273ATSE 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, timing, and signal integrity solutions, acquired by Diodes Incorporated in 2016; its FCT logic portfolio remains actively supported.

The PI74FCT273ATSE belongs to the FCT Fast CMOS logic family, designed specifically for low-power, high-speed replacement of bipolar TTL in industrial and communications infrastructure equipment.

FAQ

What is the maximum clock frequency supported by PI74FCT273ATSE?

The device supports reliable operation up to 100 MHz under typical conditions. This is derived from the 5.8 ns maximum tPLH propagation delay and 2.0 ns minimum setup time, yielding a theoretical minimum clock period of ~10 ns. Real-world designs achieve 80–100 MHz with proper PCB layout and 50 pF load.

Does PI74FCT273ATSE require external pull-up resistors on MR or CP pins?

No. The MR input has built-in hysteresis and guaranteed VIH/VIL thresholds (2.0 V/0.8 V); CP is a standard CMOS input with negligible leakage (<1 µA). External pull-ups are unnecessary unless system-level noise or open-drain signaling mandates them - not required for normal operation.

Can PI74FCT273ATSE operate at 3.3 V supply?

No. The absolute maximum VCC rating is +7.0 V, but the device is specified only for 5.0 V ±5% operation. DC electrical characteristics (VOH, VOL, VIH, VIL) and timing parameters are guaranteed only at 5 V. Operation at 3.3 V results in undefined logic thresholds and degraded timing margins.

Is PI74FCT273ATSE pin-compatible with the original 74F273?

Yes. Pinout matches 74F273 exactly: MR on pin 1, D0–D7 on pins 2–9, GND on pin 10, Q0–Q7 on pins 11–18, CP on pin 19, and VCC on pin 20. No PCB redesign is needed for drop-in replacement, though timing and power behavior differ significantly.