Texas Instruments CY74FCT163245APVC

Overview

CY74FCT163245APVC from Texas Instruments is a 16-bit non-inverting bus transceiver with 5V-tolerant inputs/outputs, 4.8 ns propagation delay (max), 24 mA balanced drive capability, and power-off high-impedance outputs. It operates from 2.7V to 3.6V V_CC, supports bidirectional data flow under DIR/OE control, and is used in mixed-voltage backplane and motherboard interconnects requiring live insertion.

For engineers reviewing the CY74FCT163245APVC datasheet, CY74FCT163245APVC pinout, CY74FCT163245APVC application, or CY74FCT163245APVC equivalent, key selection criteria include 5V-tolerant I/O compatibility with legacy buses, industrial temperature range (–40°C to +85°C), SSOP-48 package footprint, and FCT-C speed grade for synchronous bus bridging in embedded computing systems.

Technical Context

The CY74FCT163245APVC implements dual 8-bit bidirectional data paths controlled by independent DIR and OE signals per port group. Data direction is determined by DIR level while OE enables/disables output drivers - both active-low logic functions. The device uses FCT-C core logic with edge-rate control circuitry to limit switching noise and ground bounce.

It features 5V-tolerant CMOS inputs that accept TTL- or 5V CMOS-level signals while operating from a 3.3V supply, enabling voltage translation between 5V peripherals and 3.3V system buses. Outputs provide symmetrical 24 mA sink/source drive with current-limiting resistors, reducing need for external termination and minimizing undershoot.

Key Specifications

Pinout & Package

Package: 48-pin SSOP (O48), 300-mil body width, JEDEC MO-118 compliant, 0.025-inch pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit bidirectional bus transceiver applications.

Compared with CY74FCT163245CPVC, the CY74FCT163245APVC trades 0.7 ns speed for broader availability and lower cost in industrial volume production; versus SN74LVCH16245A, it delivers essential 5V-tolerant I/O and stronger drive for legacy system upgrades without redesigning interface circuitry.

Availability

CY74FCT163245APVC is available at Aetrix Electronics and suitable for industrial control backplanes, embedded computing baseboards, and telecom shelf management buses requiring stable component supply across extended product lifecycles.

Supply support for CY74FCT163245APVC 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 decades of experience in high-reliability industrial and communications ICs.

The CY74FCT163245APVC belongs to TI's FCT logic family, designed specifically for robust, low-noise, mixed-voltage bus interfacing in mission-critical industrial and telecom infrastructure equipment.

FAQ

What is the maximum clock frequency supported by CY74FCT163245APVC in a synchronous bus application?

The CY74FCT163245APVC supports reliable operation in synchronous buses up to approximately 208 MHz, derived from its 4.8 ns maximum propagation delay (t_PLH/t_PHL) and 5.2 ns maximum output disable time (t_PLZ). This allows sufficient setup/hold margin for standard 16-bit parallel interfaces such as CompactPCI or custom backplane protocols. Actual achievable frequency depends on PCB trace length, loading, and system-level timing constraints - CY74FCT163245APVC itself does not contain internal clock circuitry.

Does CY74FCT163245APVC include bus-hold circuitry on its inputs?

No, CY74FCT163245APVC does not include bus-hold functionality. Bus-hold is exclusive to the CY74FCT163H245 variant (e.g., CY74FCT163H245APVC). The CY74FCT163245APVC requires external pull-up or pull-down resistors on unused or floating inputs to prevent undefined logic states, as confirmed in the functional description and pin behavior tables of the official datasheet.

Can CY74FCT163245APVC be used for level translation between 5V and 3.3V logic domains?

Yes, CY74FCT163245APVC is explicitly designed for this purpose: its inputs and outputs are 5V-tolerant while operating from a 3.3V supply (V_CC = 2.7–3.6V). It translates 5V CMOS/TTL signals down to 3.3V logic levels on receive, and drives 5V-bus-compatible voltages on transmit - making it ideal for interfacing legacy 5V peripherals with modern 3.3V controllers without external translators.

What is the meaning of "power-off disable" in CY74FCT163245APVC specifications?

"Power-off disable" means that when V_CC = 0V, all outputs of CY74FCT163245APVC enter a high-impedance state with leakage current ≤ ±100 µA, even if input or output pins are driven externally. This prevents back-powering or contention on live buses during hot-insertion or board replacement - a critical feature for modular systems like telecom shelves or industrial PLCs where CY74FCT163245APVC is commonly deployed.

Is CY74FCT163245APVC pin-compatible with CY74FCT163245CPVC?

Yes, CY74FCT163245APVC and CY74FCT163245CPVC share identical pinout, package (SSOP-48), and electrical interface - differing only in speed grade (4.8 ns vs. 4.1 ns propagation delay) and ordering code suffix. Both operate over the same V_CC range and temperature specification, allowing direct substitution where timing margins permit; no PCB changes are required for replacement.