Texas Instruments 74FCT162543CTPACT

Overview

74FCT162543CTPACT from Texas Instruments is a 16-bit balanced-output latched transceiver in 56-pin TSSOP, supporting bidirectional data flow with independent A-to-B and B-to-A latch/enable controls, 24 mA balanced drivers, 5.1 ns max propagation delay (transparent mode), and industrial −40°C to +85°C operation. It drives transmission lines with reduced ground bounce (VOLP < 0.6 V) in high-speed bus interface applications.

For engineers reviewing the 74FCT162543CTPACT datasheet, 74FCT162543CTPACT pinout, 74FCT162543CTPACT application, or 74FCT162543CTPACT equivalent, key selection criteria include output drive balance, Ioff partial-power-down support, edge-rate controlled noise performance, latch timing margins (tSU/tH = 2.0 ns), and TSSOP-56 package compatibility with dense PCB layouts.

Technical Context

The 74FCT162543CTPACT implements two independent 8-bit D-type latched transceivers, each with separate Latch Enable (LEAB/LEBA) and Output Enable (OEAB/OEBA) inputs, enabling precise control of data capture and three-state output activation per direction. Its architecture supports simultaneous latching on one port while driving the other.

It features current-limiting resistors integrated into 24 mA balanced output drivers, minimizing undershoot and eliminating need for external termination on transmission lines. The Ioff circuitry disables outputs during power-down to prevent backflow current, and edge-rate control reduces system switching noise without sacrificing speed.

Key Specifications

Pinout & Package

74FCT162543CTPACT is housed in a 56-pin Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, with 0.5 mm pitch, 13.9–14.1 mm body width, and 1.2 mm max height - optimized for automated assembly and high-density routing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY74FCT16543CTPVC and 74FCT162H543CTPACT, the 74FCT162543CTPACT offers optimal balance of low-noise transmission-line drive, compact TSSOP packaging, and industrial temperature reliability - making it preferred for space-constrained, noise-sensitive, and high-integrity bus extension designs.

Availability

74FCT162543CTPACT is available at Aetrix Electronics and suitable for industrial backplane interfaces, high-speed bus isolation, transmission line drivers, and legacy system bus extenders requiring stable component supply across extended product lifecycles.

Supply support for 74FCT162543CTPACT 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 expertise in high-reliability industrial and automotive-grade components.

The 74FCT162543CTPACT belongs to TI's FCT logic family, engineered for low-noise, high-speed 5-V bus interfacing in industrial control, instrumentation, and communications infrastructure where signal integrity and thermal robustness are critical.

FAQ

What is the maximum operating frequency supported by the 74FCT162543CTPACT?

The 74FCT162543CTPACT does not specify a maximum clock frequency directly, but its 5.1 ns maximum propagation delay in transparent mode supports reliable operation in bus systems with ≤100 MHz toggle rates. Timing margins must be verified against system-level setup/hold requirements, especially when used with external latches or clocked controllers. The 74FCT162543CTPACT is designed for asynchronous or source-synchronous interfaces rather than synchronous clock domains.

Does the 74FCT162543CTPACT support hot-swap or partial-power-down operation?

Yes, the 74FCT162543CTPACT includes Ioff circuitry that disables outputs when VCC = 0 V, preventing damaging current backflow during hot-insertion or partial power-down sequences. This feature is explicitly characterized in the datasheet and enables safe use in modular systems where boards may be powered independently. The 74FCT162543CTPACT maintains this behavior across its full industrial temperature range.

How does the 74FCT162543CTPACT differ from the CY74FCT16543CTPVC in terms of drive strength and noise performance?

The 74FCT162543CTPACT provides balanced ±24 mA output drive with typical ground bounce (VOLP) < 0.6 V, optimized for transmission-line driving. In contrast, the CY74FCT16543CTPVC delivers asymmetric 64 mA sink / 32 mA source drive and higher VOLP (< 1.0 V), targeting high-capacitance loads. The 74FCT162543CTPACT's edge-rate control and lower VOLP yield superior noise characteristics for medium-length traces and unterminated lines.

Can the 74FCT162543CTPACT be used in place of the 74FCT162H543CTPACT?

The 74FCT162543CTPACT and 74FCT162H543CTPACT share identical pinout, package, drive strength, and timing specs, but the latter adds bus-hold circuitry on all data inputs to retain last logic state when inputs float. If your design guarantees defined input states (e.g., via pull resistors or driven sources), the 74FCT162543CTPACT is functionally interchangeable. However, omitting bus-hold may cause undefined behavior in unconnected or high-impedance configurations.

What PCB layout considerations are recommended for the 74FCT162543CTPACT in high-speed applications?

For optimal signal integrity, route A/B data traces with controlled impedance (50 Ω), minimize stub lengths, and place 0.1 µF ceramic decoupling capacitors within 3 mm of each VCC–GND pair. Use solid ground planes beneath the 74FCT162543CTPACT, avoid splits under signal paths, and ensure symmetric trace lengths for matched pairs. The TSSOP-56 land pattern per TI's DGG0056A outline is mandatory for reliable reflow soldering.