Texas Instruments CY74FCT273CTSOCTG4

Overview

CY74FCT273CTSOCTG4 from Texas Instruments is an 8-bit edge-triggered D-type flip-flop register with common clock (CP) and master reset (MR), delivering 5.8 ns propagation delay, 64 mA sink / 32 mA source output drive, and full TTL-compatible I/O levels. It operates across –40°C to +85°C and supports partial-power-down via Ioff, serving as a high-drive data latch in bus interface and control logic circuits.

For engineers reviewing the CY74FCT273CTSOCTG4 datasheet, CY74FCT273CTSOCTG4 pinout, CY74FCT273CTSOCTG4 application, or CY74FCT273CTSOCTG4 equivalent, key selection criteria include its SOIC-20 package, guaranteed 5.8 ns max tPLH/tPHL, Ioff-enabled power-down isolation, matched rise/fall times, and compatibility with legacy FCT/F logic families in industrial control and instrumentation systems.

Technical Context

This device implements eight independent D-type flip-flops sharing synchronous CP and asynchronous MR inputs, with all outputs updated on the low-to-high clock transition. Its architecture includes edge-rate control circuitry to suppress switching noise and ESD protection exceeding JESD22-A114A (2000 V HBM).

It features fully specified Ioff functionality that disables outputs when VCC = 0 V, preventing backflow current during partial power-down. Input thresholds are TTL-compatible (VIH = 2 V min, VIL = 0.8 V max), and output voltage levels meet VOH ≥ 2.4 V (at IOH = –32 mA) and VOL ≤ 0.55 V (at IOL = 64 mA).

Key Specifications

Pinout & Package

CY74FCT273CTSOCTG4 is housed in a 20-pin SOIC (DW) package, 7.5 mm × 12.8 mm body size, with standard 0.050″ (1.27 mm) lead pitch and gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74FCT273NSR and 74ACT273SCX, CY74FCT273CTSOCTG4 provides superior timing performance (5.8 ns vs. 7.2/10 ns), higher output drive (64/32 mA vs. 32/12 mA), and essential Ioff functionality for robust power sequencing-making it the optimal choice for industrial and automotive control applications demanding reliability and noise immunity.

Availability

CY74FCT273CTSOCTG4 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, and test equipment digital pattern generation requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for CY74FCT273CTSOCTG4 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 50 years of innovation in high-reliability logic interfaces and timing devices.

CY74FCT273CTSOCTG4 belongs to TI's FCT logic family, engineered for high-noise-immunity, TTL-compatible bus interface applications in industrial automation, test instrumentation, and automotive electronics.

FAQ

What is the maximum clock frequency supported by CY74FCT273CTSOCTG4?

CY74FCT273CTSOCTG4 has a maximum propagation delay of 5.8 ns, supporting reliable operation up to approximately 100 MHz under typical conditions. The actual usable frequency depends on system-level setup/hold timing margins, load capacitance, and PCB routing; TI recommends maintaining ≥2 ns setup time (tsu = 2 ns) and ≥1.5 ns hold time (th = 1.5 ns) relative to the CP rising edge for robust functionality in CY74FCT273CTSOCTG4 designs.

Does CY74FCT273CTSOCTG4 support partial power-down operation?

Yes, CY74FCT273CTSOCTG4 includes Ioff circuitry that actively disables outputs when VCC = 0 V, preventing damaging current backflow from powered sections of the system into the unpowered device. This feature is fully characterized per TI's datasheet and enables safe hot-swap, power-gating, and mixed-voltage domain operation - a critical capability not present in standard 74ACT or 74LS register variants.

What is the pin configuration and package type of CY74FCT273CTSOCTG4?

CY74FCT273CTSOCTG4 uses a 20-pin SOIC (DW) package with standard 0.300″ body width and 0.050″ lead pitch. Pin 1 is MR (master reset), pins 2–9 are D0–D7 inputs, pin 10 is GND, pin 11 is VCC, pins 12–19 are Q0–Q7 outputs, and pin 20 is CP (clock). This matches the industry-standard SOIC-20 footprint used across TI's FCT register family.

How does CY74FCT273CTSOCTG4 differ from the base CY74FCT273T variant?

CY74FCT273CTSOCTG4 is the "C" speed grade (5.8 ns max propagation delay) in SOIC packaging with tape-and-reel delivery (SOCT) and green RoHS-compliant finish (G4 suffix). In contrast, CY74FCT273T denotes the slower 13 ns version. The "C" grade delivers tighter timing, enabling higher system throughput in data-path latching and control register applications where CY74FCT273CTSOCTG4 replaces older FCT273T designs.

Is CY74FCT273CTSOCTG4 compatible with 3.3 V logic systems?

No, CY74FCT273CTSOCTG4 is a 5 V-only device with recommended VCC of 4.75–5.25 V and TTL-compatible input thresholds (VIH ≥ 2 V, VIL ≤ 0.8 V). It is not 3.3 V tolerant - applying 3.3 V signals to inputs may result in marginal switching or increased static current. For 3.3 V systems, TI recommends the 74LVC273 or SN74LV273A families instead of CY74FCT273CTSOCTG4.