Renesas 74FCT16952CTPAG

Overview

74FCT16952CTPAG from Renesas Electronics is a 16-bit registered transceiver in TSSOP-56 package, operating at 5V with industrial temperature range (–40°C to +85°C), tPLH/tPHL ≤ 6.3 ns, and high-drive outputs (–32 mA IOH, 64 mA IOL), used for bidirectional data buffering in backplane and bus interface applications.

For engineers reviewing the 74FCT16952CTPAG datasheet, 74FCT16952CTPAG pinout, 74FCT16952CTPAG application, or 74FCT16952CTPAG equivalent, this device supports independent A↔B register-controlled data flow with separate clock enable, output enable, and clock inputs per direction - critical for synchronous bus isolation and hot-swap-capable system designs.

Technical Context

The 74FCT16952CTPAG implements two independent 8-bit D-type registered transceivers, each with dedicated xCEAB/xCLKAB/xOEAB (A-to-B) and xCEBA/xCLKBA/xOEBA (B-to-A) control logic. It uses 0.5 µm CMOS technology and features power-off disable outputs enabling live insertion.

Its timing architecture guarantees tSK(o) < 0.5 ns (output skew), tSU ≥ 2.5 ns (data-to-clock setup), and tW ≥ 3 ns (clock pulse width), meeting strict synchronization requirements for high-speed parallel buses driving capacitive loads up to 50 pF.

Key Specifications

Pinout & Package

74FCT16952CTPAG is housed in a 56-pin Thin Shrink Small Outline Package (TSSOP) with 0.5 mm pitch, 12.5 mm × 6.1 mm body size, and exposed thermal pad (non-electrical). Pin numbering follows standard JEDEC TSSOP-56 top-view convention.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74FCT16952ATPAG and SN74ALVCH162245DGGR, the 74FCT16952CTPAG uniquely balances 5 V industrial robustness, sub-7 ns timing, and true live-insertion capability - making it optimal for legacy-compatible, high-reliability backplane interfaces where voltage and timing constraints are non-negotiable.

Availability

74FCT16952CTPAG is available at Aetrix Electronics and suitable for industrial automation controllers, telecom line cards, and test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant TSSOP packaging.

Supply support for 74FCT16952CTPAG 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

Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and connectivity solutions for automotive, industrial, infrastructure, and IoT applications.

The 74FCT16952CTPAG belongs to Renesas' legacy IDT FCT logic family - engineered specifically for high-drive, low-skew, industrial-grade parallel bus interfacing with live-insertion safety.

FAQ

What is the maximum clock frequency supported by the 74FCT16952CTPAG?

The 74FCT16952CTPAG does not specify a maximum clock frequency in its datasheet; instead, it guarantees timing parameters at defined load conditions. With tPLH/tPHL ≤ 6.3 ns and tW ≥ 3 ns, the device supports reliable operation up to approximately 80 MHz in typical 50 pF loading scenarios - assuming proper PCB layout and supply decoupling. System-level validation is required for frequencies above 50 MHz.

Does the 74FCT16952CTPAG support 3.3 V logic levels?

No, the 74FCT16952CTPAG is a 5 V-only device. Its VIH minimum is 2.0 V and VIL maximum is 0.8 V, making it compatible with TTL and 5 V CMOS logic families, but not with native 3.3 V signaling. Applying 3.3 V inputs may result in marginal noise margins or undefined behavior - level-shifting circuitry is required for interfacing with 3.3 V systems.

How many ground and power pins does the 74FCT16952CTPAG have in its TSSOP-56 package?

The 74FCT16952CTPAG in TSSOP-56 has eight dedicated GND pins (pins 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 16, 17, 19, 20, 21, 22, 23, 24, 25, 26, 28, 29, 30, 31, 32, 33, 34, 35, 36, 47, 48, 49, 50 - total 38 pins - but only 8 are GND; the remaining are I/O, control, or VCC. Specifically, there are 8 GND and 16 VCC pins, ensuring low-impedance power delivery for high-current switching.

Can the 74FCT16952CTPAG operate with one direction registered and the other transparent?

Yes - the 74FCT16952CTPAG supports asymmetric operation. For example, setting xCEAB = LOW and xCLKAB toggling enables registered A→B transfer, while holding xCEBA = HIGH disables B→A clocking, leaving those outputs in high-impedance unless xOEBA is asserted. This allows one-directional latching with bidirectional bus isolation - a key feature for protocol bridging applications.

Is the 74FCT16952CTPAG pin-compatible with the 74FCT16952ETPAG?

Yes, the 74FCT16952CTPAG and 74FCT16952ETPAG share identical pinout, package (TSSOP-56), and functional block diagram. The only difference is speed grade: E-grade offers tPLH/tPHL ≤ 3.7 ns versus C-grade's ≤6.3 ns. All control, I/O, and power pins map identically - allowing direct substitution where timing budget permits.