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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Texas Instruments 74FCT162652CTPACT

Name: 74FCT162652CTPACT
Brand: Texas Instruments
SKU: 74FCT162652CTPACT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74FCT162652CTPACT

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 56-TFSOP (0.240", 6.10mm Width)

Datasheet:: 74FCT162652CTPACT.pdf

Description:: IC TXRX NON-INVERT 5.5V 56TSSOP

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Product details

Overview

74FCT162652CTPACT from Texas Instruments is a 16-bit registered transceiver IC with dual 8-bit bus registers, balanced 24 mA output drivers, I_off partial-power-down support, and TSSOP-56 packaging. It enables bidirectional, clocked data transfer between two buses with real-time or stored-data selection, and is specified for industrial operation from −40°C to +85°C at V_CC = 5V ±10%. It is used in high-speed backplane and transmission-line interfacing applications requiring low ground bounce.

For engineers reviewing the 74FCT162652CTPACT datasheet, 74FCT162652CTPACT pinout, 74FCT162652CTPACT application, or 74FCT162652CTPACT equivalent, key selection criteria include its 5.4 ns max propagation delay (bus-to-bus), 0.5 ns output skew, 0.6 V typical ground bounce (V_OLP), three-state register control, and TSSOP-56 footprint compatibility with high-density PCB layouts.

Technical Context

This device implements two independent 8-bit D-type registered transceivers with separate clock (CLKAB/CLKBA), select (SAB/SBA), and output-enable (OEAB/OEBA) controls. Data can be latched on rising clock edges regardless of OE/S state, enabling synchronous storage and multiplexed output routing.

Its balanced 24 mA drivers incorporate internal current-limiting resistors to reduce external termination needs, minimize undershoot, and suppress ground bounce-critical for clean signal integrity on transmission lines and stub-loaded backplanes.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC	5 V ±10% - Fixed single-supply operation compatible with TTL/CMOS logic families.
Propagation Delay (Bus-to-Bus)	Max 5.4 ns - Enables ≤185 MHz sustained data throughput in synchronous bus systems.
Output Skew	≤0.5 ns - Ensures tight timing alignment across all 16 outputs, critical for parallel bus setup/hold compliance.
I_off	±1 µA at V_CC = 0 V - Prevents backflow current during partial power-down, supporting hot-swap and power-gating schemes.
V_OLP (Ground Bounce)	Typical <0.6 V at V_CC = 5 V - Reduces noise coupling into adjacent signals and supply rails during simultaneous switching.
Operating Temperature	−40°C to +85°C - Qualified for industrial environments without derating or thermal management overhead.
Input Hysteresis	100 mV - Improves noise immunity on control inputs (OE, S, CLK) in electrically noisy board-level environments.

Pinout & Package

74FCT162652CTPACT is housed in a 56-pin Thin Shrunk Small Outline Package (TSSOP-DGG), 13.9 mm × 7.9 mm × 1.2 mm max height, 0.5 mm pitch, with pin 1 marked by a corner chamfer and seating plane defined per JEDEC MO-153.

Pin/Terminal	Circuit Role	Design Meaning
1OEAB, 2OEAB, 1OEBA, 2OEBA	Output Enable (Active Low)	Independently disables A→B or B→A outputs to high-impedance state; supports bus arbitration and multi-drop isolation.
1CLKAB, 2CLKAB, 1CLKBA, 2CLKBA	Clock Input (Rising Edge)	Latches data from A or B bus into respective 8-bit registers on each rising edge; asynchronous to OE/S states.
1SAB, 2SAB, 1SBA, 2SBA	Data Source Select	Selects real-time (pass-through) or registered (latched) data path for each direction; enables time-multiplexed bus sharing.
1A1–1A8, 2A1–2A8	Register A Inputs / B Outputs	8-bit port A interface; drives B bus when OEAB active and SAB selects stored or real-time source.
1B1–1B8, 2B1–2B8	Register B Inputs / A Outputs	8-bit port B interface; drives A bus when OEBA active and SBA selects stored or real-time source.
V_CC, GND	Power Supply	Dual V_CC (pins 13, 27, 40, 52) and multiple GND (pins 1, 11, 12, 25, 36, 47, 56) pins minimize IR drop and improve PSRR.

Key Features

Feature	Design Value
Balanced 24 mA output drivers	Reduces need for external series termination resistors and lowers ground bounce to <0.6 V, improving signal fidelity on 50 Ω transmission lines.
I_off partial-power-down protection	Enables safe operation in mixed-voltage or hot-plug systems by disabling outputs and blocking reverse current when V_CC = 0 V.
Edge-rate control circuitry	Slows output transitions just enough to suppress EMI and crosstalk without compromising 5.4 ns propagation delay performance.
Typical output skew < 0.5 ns	Guarantees simultaneous valid data arrival across all 16 bits, eliminating inter-bit timing violations in wide-bus interfaces.
Industrial temperature range	Operates reliably from −40°C to +85°C without thermal derating-suitable for uncontrolled industrial enclosures and outdoor equipment.

Applications

Backplane Interfacing	High-Speed Bus Isolation
Use Scenario: Connecting processor local bus to a multi-slot passive backplane with long trace runs and stub loads. IC Role / Device Role / Timing Role: Registered transceiver providing clock-synchronized, low-skew, low-noise data transfer between master and peripheral slots. Use Value: Balanced 24 mA drivers and sub-0.6 V ground bounce ensure signal integrity over 15 cm traces without external termination, reducing BOM count and layout complexity.	Use Scenario: Isolating two voltage-isolated domains (e.g., MCU core vs. I/O expansion) while maintaining synchronous data exchange. IC Role / Device Role / Timing Role: Dual-register transceiver enabling controlled, glitch-free handshaking via independent OE and clock controls. Use Value: I_off support allows one side to power down while preserving bus state and preventing leakage-critical for low-power system sleep modes.
Transmission-Line Driving	Memory Interface Buffering
Use Scenario: Driving point-to-point DDR or SRAM address/data buses with controlled impedance (50–75 Ω). IC Role / Device Role / Timing Role: Registered buffer with edge-rate control and precise 5.4 ns delay matching for setup/hold timing closure. Use Value: Output skew ≤0.5 ns and propagation delay consistency enable reliable 185+ MHz operation without timing margin erosion across bit lanes.	Use Scenario: Extending memory bus length between SoC and off-die SDRAM or Flash in space-constrained embedded systems. IC Role / Device Role / Timing Role: Registered repeater that retimes and reinforces signals, compensating for capacitive loading and flight-time mismatch. Use Value: Real-time + stored data mode allows dynamic switching between direct pass-through and registered buffering-supporting both burst and random-access patterns.

Backplane Interfacing

High-Speed Bus Isolation

Use Scenario: Connecting processor local bus to a multi-slot passive backplane with long trace runs and stub loads.

IC Role / Device Role / Timing Role: Registered transceiver providing clock-synchronized, low-skew, low-noise data transfer between master and peripheral slots.

Use Value: Balanced 24 mA drivers and sub-0.6 V ground bounce ensure signal integrity over 15 cm traces without external termination, reducing BOM count and layout complexity.

Use Scenario: Isolating two voltage-isolated domains (e.g., MCU core vs. I/O expansion) while maintaining synchronous data exchange.

IC Role / Device Role / Timing Role: Dual-register transceiver enabling controlled, glitch-free handshaking via independent OE and clock controls.

Use Value: I_off support allows one side to power down while preserving bus state and preventing leakage-critical for low-power system sleep modes.

Transmission-Line Driving

Memory Interface Buffering

Use Scenario: Driving point-to-point DDR or SRAM address/data buses with controlled impedance (50–75 Ω).

IC Role / Device Role / Timing Role: Registered buffer with edge-rate control and precise 5.4 ns delay matching for setup/hold timing closure.

Use Value: Output skew ≤0.5 ns and propagation delay consistency enable reliable 185+ MHz operation without timing margin erosion across bit lanes.

Use Scenario: Extending memory bus length between SoC and off-die SDRAM or Flash in space-constrained embedded systems.

IC Role / Device Role / Timing Role: Registered repeater that retimes and reinforces signals, compensating for capacitive loading and flight-time mismatch.

Use Value: Real-time + stored data mode allows dynamic switching between direct pass-through and registered buffering-supporting both burst and random-access patterns.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY74FCT162652CTPVC	Same die, SSOP-56 package (300-mil width, 25-mil pitch); 0.2 mm larger footprint than TSSOP.	Preferred where board assembly uses SSOP-compatible reflow profiles or legacy tooling; less suitable for ultra-high-density layouts.	Select when mechanical compatibility with existing SSOP footprints is required; identical electrical behavior to 74FCT162652CTPACT.
74FCT16652CTPACT	Higher-drive variant: 64 mA sink / 32 mA source; no current-limiting resistors; higher ground bounce (typ. 1.0 V).	Better suited for driving heavy capacitive loads (>100 pF) or low-impedance backplanes; not optimized for transmission-line impedance matching.	Choose for maximum drive strength where signal integrity is managed externally; avoid if ground bounce or EMI is design-critical.

Compared with CY74FCT162652CTPVC, 74FCT162652CTPACT offers identical logic and timing but saves 1.5 mm in width and 0.3 mm in height-enabling tighter board stacking. Versus 74FCT16652CTPACT, it trades raw drive strength for lower noise and built-in termination, making it preferable for clean, high-speed point-to-point links.

Availability

74FCT162652CTPACT is available at Aetrix Electronics and suitable for industrial backplane interfacing, high-speed memory extension, transmission-line driving, and registered bus isolation requiring stable component supply across extended product lifecycles.

Supply support for 74FCT162652CTPACT 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, precision, and industrial-grade qualification.

The 74FCT family was designed specifically for high-speed, low-noise, 5-V TTL-compatible logic interfacing in industrial and telecom infrastructure-prioritizing timing accuracy, noise immunity, and robust power-down behavior.

FAQ

What is the maximum operating frequency supported by the 74FCT162652CTPACT?

The 74FCT162652CTPACT has a maximum bus-to-bus propagation delay of 5.4 ns, supporting reliable operation up to approximately 185 MHz in synchronous bus systems. This value is measured under industrial conditions (−40°C to +85°C, V_CC = 4.5 V to 5.5 V) and accounts for worst-case process/voltage/temperature corners. The 74FCT162652CTPACT does not specify a hard maximum clock frequency, but system-level timing must respect setup/hold margins derived from its 2.0 ns setup and 1.5 ns hold times.

Does the 74FCT162652CTPACT support hot-swap or partial-power-down operation?

Yes, the 74FCT162652CTPACT integrates I_off circuitry that actively disables all outputs and limits reverse current to ±1 µA when V_CC = 0 V. This allows safe insertion or removal in live backplanes and enables selective power gating of subsystems without damaging the 74FCT162652CTPACT or connected devices-fully compliant with JEDEC JESD78 requirements for powered-off protection.

How does the 74FCT162652CTPACT differ from the 74FCT16652CTPACT in terms of drive capability and noise performance?

The 74FCT162652CTPACT features balanced 24 mA output drivers with integrated current-limiting resistors, yielding typical ground bounce (V_OLP) below 0.6 V. In contrast, the 74FCT16652CTPACT delivers 64 mA sink / 32 mA source without internal limiting, resulting in higher ground bounce (~1.0 V). This makes the 74FCT162652CTPACT better suited for low-noise transmission-line driving, while the 74FCT16652CTPACT targets high-capacitance load scenarios where raw drive strength outweighs EMI concerns.

Can the 74FCT162652CTPACT operate with mixed-voltage interfaces (e.g., 3.3 V inputs)?

The 74FCT162652CTPACT accepts TTL-compatible input thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V) and is designed for 5 V operation only. While 3.3 V logic outputs may meet the 2.0 V V_IH threshold under nominal conditions, TI does not guarantee interoperability with 3.3 V systems due to voltage margin erosion over temperature and process variation. For mixed-voltage designs, level-shifting or dedicated 3.3 V–5 V translators are recommended alongside the 74FCT162652CTPACT.

What is the meaning of "real-time" versus "stored" data transfer mode in the 74FCT162652CTPACT?

In real-time mode (SAB/SBA = HIGH), the 74FCT162652CTPACT passes data directly from input to output without latching-functionally acting as a transparent three-state buffer. In stored mode (SAB/SBA = LOW), it outputs data previously captured on the rising edge of CLKAB/CLKBA. This dual-mode operation allows the 74FCT162652CTPACT to serve both immediate bus bridging and synchronized pipeline staging within the same device.

74FCT162652CTPACT Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74FCT

Package/Case:: 56-TFSOP (0.240", 6.10mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Logic Type:: Transceiver, Non-Inverting

Number of Elements:: 2

Number of Bits per Element:: 8

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 24mA, 24mA

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 56-TSSOP

74FCT162652CTPACT FAQ

1.How can I place an order for 74FCT162652CTPACT through Aetrix?

Please submit a Request for Quotation (RFQ) for 74FCT162652CTPACT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 74FCT162652CTPACT reliable?

The price and inventory of 74FCT162652CTPACT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT162652CTPACT is usually 5 days.

3.What payment methods are accepted for 74FCT162652CTPACT?

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4.How is shipping managed for 74FCT162652CTPACT?

74FCT162652CTPACT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74FCT162652CTPACT order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 74FCT162652CTPACT?

For technical support, including 74FCT162652CTPACT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT162652CTPACT requirements.

6.How does Aetrix verify that 74FCT162652CTPACT is sourced from the original manufacturer or authorized distributors?

All 74FCT162652CTPACT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74FCT162652CTPACT meets industry standards.

7.What is the process for return or replacement of 74FCT162652CTPACT?

All 74FCT162652CTPACT units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT162652CTPACT, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 74FCT162652CTPACT part is unused and in its original packaging.

Return procedure for 74FCT162652CTPACT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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