Texas Instruments 74FCT162646CTPVCG4

Overview

74FCT162646CTPVCG4 from Texas Instruments is a 16-bit registered transceiver with balanced 24 mA output drivers, three-state bus interface, and I_off partial-power-down support. It operates at 5 V ±10%, delivers typical VOL < 0.55 V at 24 mA sink, and features 5.4 ns max bus-to-bus propagation delay for high-speed bidirectional data routing in backplane and transmission-line applications.

For engineers reviewing the 74FCT162646CTPVCG4 datasheet, 74FCT162646CTPVCG4 pinout, 74FCT162646CTPVCG4 application, or 74FCT162646CTPVCG4 equivalent, key selection criteria include its 24 mA balanced drive strength, sub-0.6 V ground bounce, industrial −40°C to +85°C temperature range, and SSOP-56 package compatibility with legacy FCT logic systems.

Technical Context

This device integrates dual 16-bit D-type registers with independent clock inputs (CLKAB/CLKBA), direction control (DIR), output enable (OE), and source-select inputs (SAB/SBA) to enable flexible multiplexed data flow between A and B buses - supporting real-time transparent mode, registered storage, and isolation modes. Its edge-rate controlled outputs suppress switching noise without external termination.

The 74FCT162646CTPVCG4 implements current-limiting resistors within 24 mA balanced drivers to minimize undershoot and ground bounce, making it suitable for driving controlled-impedance transmission lines. I_off circuitry ensures backflow protection during partial power-down, meeting industrial system-level reliability requirements.

Key Specifications

Pinout & Package

74FCT162646CTPVCG4 is housed in a 56-pin SSOP (Shrink Small Outline Package) with 300-mil body width, 0.025-inch pitch, and RoHS-compliant CU NIPDAU lead finish. Package conforms to JEDEC MO-118 and TI drawing DL.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74FCT162646ATPVCG4, the 74FCT162646CTPVCG4 offers tighter timing for high-throughput systems; compared with CY74FCT162646CTPVC, it provides identical performance with TI-specific traceability and logistics support.

Availability

74FCT162646CTPVCG4 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, telecom line card buffering, and backplane interfacing requiring stable component supply, long-term lifecycle management, and RoHS-compliant sourcing.

Supply support for 74FCT162646CTPVCG4 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 for industrial, automotive, and communications markets.

The 74FCT162646CTPVCG4 belongs to TI's FCT logic family, designed specifically for high-speed, low-noise bidirectional bus interfacing in industrial and telecom infrastructure where signal integrity and power-down safety are critical.

FAQ

What is the maximum operating frequency supported by the 74FCT162646CTPVCG4?

The 74FCT162646CTPVCG4 does not specify a maximum clock frequency directly, but its 5.4 ns max bus-to-bus propagation delay implies reliable operation up to approximately 185 MHz in synchronous bus systems. Real-world throughput depends on system-level timing margins, including setup/hold times (2.0 ns t_SU, 1.5 ns t_H) and clock pulse width (≥5.0 ns). For registered operation, the clock-to-bus delay is also 5.7 ns max.

Does the 74FCT162646CTPVCG4 support hot-swap or partial-power-down operation?

Yes, the 74FCT162646CTPVCG4 includes I_off circuitry that disables outputs when VCC = 0 V, preventing damaging current backflow during hot-swap or partial-power-down sequences. This feature is fully specified per JEDEC standards and enables safe integration into modular systems where boards may be inserted or removed while other sections remain powered.

What is the pin-compatible replacement for the 74FCT162646CTPVCG4 in TSSOP package?

The pin-compatible TSSOP alternative is 74FCT162646CTPACT (Z56 package, 240-mil width). It shares identical logic function, timing, drive strength, and pin assignment with the 74FCT162646CTPVCG4, differing only in package dimensions and thermal characteristics. Layout adaptation is required due to smaller body size and finer 0.5 mm pitch.

How does the 74FCT162646CTPVCG4 reduce ground bounce compared to standard FCT transceivers?

The 74FCT162646CTPVCG4 reduces ground bounce to <0.6 V (vs. <1.0 V in CY74FCT16646T) through integrated current-limiting resistors in its 24 mA balanced output drivers. This design lowers di/dt during switching, minimizing transient voltage drops across shared ground paths - a critical advantage in multi-channel, high-density PCB layouts where simultaneous output transitions occur.

Can the 74FCT162646CTPVCG4 operate with mixed-voltage interfaces (e.g., 3.3 V logic inputs)?

The 74FCT162646CTPVCG4 is a 5 V-only device with TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max), so it accepts 3.3 V logic-high signals directly. However, its outputs swing rail-to-rail at 5 V and are not 3.3 V tolerant - connecting them to 3.3 V receivers requires level-shifting or clamping to avoid damage or overstress.