Texas Instruments CY74FCT16652ATPVCT

Overview

CY74FCT16652ATPVCT from Texas Instruments is a 16-bit registered transceiver IC organized as two independent 8-bit bus transceivers with three-state D-type registers, 64 mA sink / 32 mA source drive capability, typical output skew < 250 ps, and industrial −40°C to +85°C operation. It enables bidirectional registered data transfer between high-capacitance backplane buses in telecom line cards.

For engineers reviewing the CY74FCT16652ATPVCT datasheet, CY74FCT16652ATPVCT pinout, CY74FCT16652ATPVCT application, or CY74FCT16652ATPVCT equivalent, key selection criteria include real-time vs. stored data mode control via SAB/SBA pins, Ioff partial-power-down support, ground bounce performance (VOLP < 1.0 V), and SSOP-56 package compatibility with legacy 300-mil footprint designs.

Technical Context

This device implements dual 8-bit registered transceiver logic with separate CLKAB/CLKBA clock inputs and SAB/SBA select controls to route either real-time or latched A↔B bus data. Its three-state outputs are managed by independent OEAB/OEBA enable pins, supporting isolated bus hold and multiplexed transmission without external latches.

The CY74FCT16652ATPVCT uses FCT-family CMOS technology with edge-rate control circuitry to suppress switching noise, and its Ioff protection disables outputs during power-down to prevent backflow current. It operates strictly at VCC = 5 V ± 10% and is not compatible with mixed-voltage or 3.3-V systems.

Key Specifications

Pinout & Package

Package: 56-pin SSOP (O56), 300-mil body width, 0.635 mm pitch, 1.2 mm max height. Pin-compatible with CY74FCT16652CTPVCT and CY74FCT162652 variants in same O56 package.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar registered transceiver applications.

Compared with CY74FCT16652CTPVCT, the CY74FCT16652ATPVCT trades 0.9 ns of speed margin for broader availability and cost efficiency; versus CY74FCT162652ATPVCT, it provides higher drive strength and Ioff-critical for backplane and modular systems-but with higher ground bounce.

Availability

CY74FCT16652ATPVCT is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and legacy system upgrades requiring stable component supply, long-lifecycle support, and SSOP-56 footprint compatibility.

Supply support for CY74FCT16652ATPVCT 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 company delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The CY74FCT16652ATPVCT belongs to TI's FCT logic family, designed specifically for high-speed, low-noise, 5-V registered bus interface applications in telecom and industrial equipment.

FAQ

What is the maximum clock frequency supported by CY74FCT16652ATPVCT?

The CY74FCT16652ATPVCT does not specify a maximum clock frequency in its datasheet. Instead, timing is defined by minimum pulse width (tW = 5.0 ns) and setup/hold requirements (tSU = 2.0 ns, tH = 1.5 ns). These values support reliable operation up to approximately 100 MHz in well-designed PCB layouts with controlled impedance and minimal skew. The CY74FCT16652ATPVCT must be used within these timing windows to ensure correct register capture and output stability.

Does CY74FCT16652ATPVCT support 3.3-V logic interfaces?

No, CY74FCT16652ATPVCT is a 5-V-only device with VCC = 5 V ± 10% operating range and TTL-compatible input thresholds (VIH = 2.0 V, VIL = 0.8 V). It cannot be directly interfaced to 3.3-V systems without level-shifting circuitry. The CY74FCT16652ATPVCT has no internal voltage translation and will not function reliably if VCC deviates outside 4.5–5.5 V.

How does the Ioff feature work in CY74FCT16652ATPVCT?

The Ioff feature in CY74FCT16652ATPVCT disables all outputs when VCC = 0 V, preventing current backflow from live A/B buses into the unpowered device. This protects downstream circuitry during partial-power-down or hot-swap events. The CY74FCT16652ATPVCT guarantees Ioff leakage ≤ ±1 µA under these conditions, making it suitable for modular telecom and industrial systems where subsystems power up/down independently.

Can CY74FCT16652ATPVCT operate in stored-data mode without using the internal registers?

No. Stored-data mode in CY74FCT16652ATPVCT requires LOW-to-HIGH transitions on CLKAB or CLKBA to load data into the internal D-type flip-flops. Real-time transfer occurs only when SAB/SBA = L and OEAB/OEBA are asserted; there is no bypass path around the registers. The CY74FCT16652ATPVCT always routes stored data through its internal registers-no direct combinatorial path exists between A and B buses in stored mode.

What is the thermal resistance (θJA) of CY74FCT16652ATPVCT in SSOP-56 package?

The datasheet for CY74FCT16652ATPVCT does not specify θJA (junction-to-ambient thermal resistance) for the SSOP-56 (O56) package. Power dissipation is limited to 1.0 W maximum, and junction temperature must remain within −40°C to +125°C. For thermal design, users should rely on measured board-level performance or TI's generic SSOP-56 θJA estimate of ~100°C/W under standard JEDEC test conditions. The CY74FCT16652ATPVCT requires adequate copper pour and airflow in high-density layouts to maintain reliability.