Texas Instruments 74FCT162H952ETPACT

Overview

74FCT162H952ETPACT from Texas Instruments is a 16-bit registered transceiver with bus-hold inputs, 24 mA balanced output drivers, and TSSOP-56 packaging. It operates at 5V ±10%, supports industrial temperature range (–40°C to +85°C), and delivers 6.3 ns propagation delay. It enables bidirectional data flow between two buses in high-noise digital systems such as backplane interconnects.

For engineers reviewing the 74FCT162H952ETPACT datasheet, 74FCT162H952ETPACT pinout, 74FCT162H952ETPACT application, or 74FCT162H952ETPACT equivalent, this device is selected for robust bus interfacing where floating input prevention, ground-bounce reduction (<0.6 V), and I_off-enabled partial-power-down operation are required.

Technical Context

This device integrates two synchronized 8-bit registered transceivers sharing common control lines (CEAB/CEBA, CLKAB/CLKBA, OEAB/OEBA) to implement full 16-bit A↔B data transfer. Its bus-hold circuitry actively retains the last logic state on each input when driven high-impedance, eliminating external pull resistors.

It features I_off protection enabling safe operation during partial power-down, edge-rate-controlled outputs for minimized switching noise, and TTL-compatible input thresholds (V_IL = 0.8 V, V_IH = 2.0 V) with hysteresis (100 mV). Output drive is symmetric: ±24 mA at V_CC = 5 V, with VOL ≤ 0.55 V and VOH ≥ 2.4 V under load.

Key Specifications

Pinout & Package

74FCT162H952ETPACT uses a 56-pin TSSOP package (JEDEC MO-153, TI drawing DGG), 13.9 mm × 6.0 mm body, 0.5 mm pitch, 1.2 mm max height, RoHS-compliant green finish (Pb-free, no Sb/Br), MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY74FCT162952BTPVC and CY74FCT16952CTPACT, the 74FCT162H952ETPACT uniquely combines bus-hold functionality, low-noise 24 mA drivers, and TSSOP packaging - making it the only choice when input state retention and EMI-sensitive operation are jointly required.

Availability

74FCT162H952ETPACT is available at Aetrix Electronics and suitable for industrial PLC I/O modules, telecom line cards, test equipment backplanes, and modular embedded computing systems requiring stable component supply across extended product lifecycles.

Supply support for 74FCT162H952ETPACT 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 delivering analog, embedded processing, and logic solutions with emphasis on reliability, longevity, and industrial-grade qualification.

The 74FCT162H952ETPACT belongs to TI's FCT logic family, designed specifically for high-speed, low-noise, bus-interface applications in industrial, telecom, and instrumentation systems where signal integrity and power-down safety are critical.

FAQ

What is the bus-hold feature of the 74FCT162H952ETPACT and how does it affect system design?

The 74FCT162H952ETPACT incorporates bus-hold circuitry on all A- and B-side data inputs, which actively retains the last valid logic state when inputs float. This eliminates the need for 32 external pull-up or pull-down resistors in typical backplane or modular system designs. As a result, PCB area is reduced, BOM cost is lowered, and reliability improves by removing passive components subject to solder fatigue or contamination. The 74FCT162H952ETPACT sustains ±50 µA bus-hold current to maintain state across the full industrial temperature range.

Does the 74FCT162H952ETPACT support partial power-down, and what protection does it provide?

Yes, the 74FCT162H952ETPACT implements I_off circuitry that disables outputs when V_CC = 0 V, limiting reverse current to ±1 µA. This prevents damaging current backflow through the device during hot-swap or mixed-power-domain operation. The 74FCT162H952ETPACT is fully specified for partial-power-down applications per JEDEC standards, making it suitable for systems where individual modules may be powered on/off independently while maintaining signal integrity on shared buses.

What are the key timing parameters of the 74FCT162H952ETPACT relevant for synchronous bus design?

The 74FCT162H952ETPACT guarantees a maximum propagation delay of 6.3 ns (CLKAB/CLKBA to A/B), output enable/disable times of 7.0 ns and 6.5 ns respectively, and setup/hold times of 2.5 ns and 1.5 ns for data relative to clock edges. These values are specified over the full industrial temperature range (–40°C to +85°C) at V_CC = 5 V ±10%. The 74FCT162H952ETPACT also ensures output skew <0.5 ns across all 16 bits, preserving parallel data validity in high-speed synchronous interfaces.

How does the 74FCT162H952ETPACT differ from the CY74FCT16952 series in terms of drive strength and noise performance?

Unlike the CY74FCT16952 series (64 mA sink / 32 mA source), the 74FCT162H952ETPACT uses balanced ±24 mA drivers optimized for low-noise operation - achieving typical ground bounce (VOLP) <0.6 V versus >1.0 V for the CY74FCT16952T. It also adds bus-hold, absent in the CY74FCT16952 series. The 74FCT162H952ETPACT is therefore preferred in EMI-sensitive applications like telecom line cards or test equipment, whereas CY74FCT16952 variants target high-capacitance load driving.

Is the 74FCT162H952ETPACT RoHS-compliant and what is its moisture sensitivity level?

Yes, the 74FCT162H952ETPACT is RoHS-compliant and classified as "Green" (Pb-free, no Sb/Br flame retardants) per TI's eco-plan. Its package is a TSSOP-56 (drawing DGG) with MSL Level-1 rating (260°C peak reflow, unlimited floor life), meaning it can be stored indefinitely at ambient conditions without baking prior to assembly. This simplifies manufacturing logistics and supports long-term production continuity for the 74FCT162H952ETPACT.