Texas Instruments CY74FCT273TSOCT

Overview

CY74FCT273TSOCT from Texas Instruments is an 8-bit edge-triggered D-type flip-flop register with common clock (CP) and master reset (MR), delivering 64-mA sink / 32-mA source drive, 13-ns max propagation delay, and Ioff partial-power-down support for industrial control bus interfacing.

For engineers reviewing the CY74FCT273TSOCT datasheet, CY74FCT273TSOCT pinout, CY74FCT273TSOCT application, or CY74FCT273TSOCT equivalent, key selection criteria include TTL-compatible input/output levels, SOIC-20 package thermal performance (θJA = 58°C/W), MR-synchronized asynchronous reset behavior, and –40°C to 85°C operating range compliance.

Technical Context

This device implements eight independent D-type latches triggered on the low-to-high CP transition, with all Q outputs forced low by an active-low MR signal. It uses FCT logic architecture with edge-rate control circuitry to suppress switching noise and matched rise/fall times for clean signal integrity.

Designed for mixed-voltage system interfacing, it accepts TTL-level inputs (VIH = 2 V min, VIL = 0.8 V max) while driving TTL loads at 5-V supply, and features Ioff protection enabling safe back-drive isolation during partial power-down states.

Key Specifications

Pinout & Package

Package: SOIC-20 (DW), 7.5 mm × 12.8 mm body, 1.27 mm pitch, RoHS-compliant NiPdAu lead finish, MSL Level-1 (unlimited reflow).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit register applications.

Compared with SN74FCT273SOIC and 74ACT273SOIC, CY74FCT273TSOCT provides superior drive strength and Ioff-enabled power sequencing - critical for industrial backplanes and automotive modules where mixed-supply reliability is mandatory.

Availability

CY74FCT273TSOCT is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, test equipment digital pattern generation, and legacy bus interface adapters requiring stable component supply across extended temperature ranges.

Supply support for CY74FCT273TSOCT 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 90 years of innovation in industrial, automotive, and communications markets.

The CY74FCT273TSOCT belongs to TI's FCT logic family, engineered for high-noise-immunity 5-V TTL-compatible interfacing in mission-critical industrial and automotive control systems.

FAQ

What is the maximum clock frequency supported by CY74FCT273TSOCT?

CY74FCT273TSOCT has a maximum propagation delay of 13 ns (CP to Q), supporting reliable operation up to approximately 77 MHz in systems with zero setup/hold margin. Real-world maximum frequency depends on board layout, load capacitance, and timing margins - design validation requires measurement under actual operating conditions using the specified 50-pF load.

Does CY74FCT273TSOCT support partial power-down mode?

Yes, CY74FCT273TSOCT supports partial power-down mode via its Ioff feature. When VCC = 0 V, Ioff limits output leakage to ±1 µA even with up to 4.5 V applied at I/O pins, preventing damaging back-current flow in hot-swap or multi-rail power sequencing applications.

What is the recommended decoupling for CY74FCT273TSOCT?

Each CY74FCT273TSOCT requires a minimum 0.1-µF ceramic capacitor placed as close as possible to the VCC pin (Pin 11) and GND pin (Pin 10). For systems with multiple devices or high-frequency switching, add a bulk 4.7-µF tantalum or aluminum electrolytic capacitor near the power entry point to suppress low-frequency ripple.

Can CY74FCT273TSOCT be used with 3.3-V microcontrollers?

CY74FCT273TSOCT is designed for 5-V operation (4.75–5.25 V) and TTL-compatible inputs; its VIH minimum is 2.0 V, so it can accept 3.3-V logic highs. However, its outputs swing to ~3.3 V (VOH typ) at 32-mA load - verify that the 3.3-V receiver's VIH threshold is ≤3.0 V and that DC loading remains within spec.

Is CY74FCT273TSOCT pin-compatible with CY74FCT273ATSOCT?

Yes, CY74FCT273TSOCT and CY74FCT273ATSOCT share identical SOIC-20 (DW) packaging, pinout, and logic functionality. The primary difference is speed grade: CY74FCT273TSOCT has 13-ns max propagation delay, while CY74FCT273ATSOCT is rated for 7.2 ns - both are drop-in replacements in footprint and connectivity, but timing-critical designs must validate against the slower variant's specs.