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

Texas Instruments 74FCT16543ATPACTG4

Name: 74FCT16543ATPACTG4
Brand: Texas Instruments
SKU: 74FCT16543ATPACTG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74FCT16543ATPACTG4

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: 74FCT16543ATPACTG4.pdf

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

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Product details

Overview

74FCT16543ATPACTG4 from Texas Instruments is a 16-bit high-speed latched transceiver organized as two independent 8-bit D-type latched transceivers, supporting bidirectional data flow with separate latch enable (LEAB/LEBA) and output enable (OEAB/OEBA) controls per channel. It delivers 64 mA sink / 32 mA source drive, operates at 5V ±10%, and targets industrial backplane and bus interface applications requiring low ground bounce (<1.0 V) and fast propagation delay (max 6.5 ns in transparent mode).

For engineers reviewing the 74FCT16543ATPACTG4 datasheet, 74FCT16543ATPACTG4 pinout, 74FCT16543ATPACTG4 application, or 74FCT16543ATPACTG4 equivalent, key selection criteria include its 56-pin TSSOP package, I_off-enabled partial-power-down capability, edge-rate controlled outputs for noise reduction, and compatibility with 5-V TTL/CMOS logic systems in high-capacitance environments.

Technical Context

The 74FCT16543ATPACTG4 implements dual 8-bit transparent/latched bidirectional data paths with independent A-to-B and B-to-A control logic. Each direction uses dedicated CE (enable), LE (latch), and OE (output enable) inputs to manage data capture, storage, and three-state output activation without interference between channels.

Its I_off circuitry actively disables outputs during power-down to prevent current backflow, while edge-rate control minimizes switching noise and ground bounce-critical for stable operation on loaded backplanes. The device is fully specified for −40°C to +85°C industrial temperature range and 5V ±10% supply.

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Supply	5 V ±10% - compatible with standard 5-V TTL/CMOS logic rails and legacy industrial power domains.
Propagation Delay	Max 6.5 ns (transparent mode) - enables high-speed data transfer across buses up to ~150 MHz clock-equivalent timing.
Output Drive	64 mA sink / 32 mA source - sufficient to drive high-capacitance loads (e.g., >100 pF traces) and low-impedance backplanes directly.
Ground Bounce (VOLP)	<1.0 V at VCC = 5 V, TA = 25°C - ensures signal integrity during simultaneous switching of multiple outputs.
I_off Support	Yes - prevents damaging current backflow when VCC = 0 V, enabling safe partial-power-down in mixed-supply systems.
ESD Rating	>2000 V (HBM) - provides robust handling margin during board assembly and field service.
Operating Temperature	−40°C to +85°C - qualified for industrial-grade embedded control, instrumentation, and communications equipment.

Pinout & Package

74FCT16543ATPACTG4 is housed in a 56-pin Thin Shrunk Small Outline Package (TSSOP), JEDEC MO-153 compliant, with 0.5-mm pitch, 13.9–14.1 mm body width, and maximum 1.2-mm height. Pin 1 identifier located at top-left corner with beveled edge marking.

Pin/Terminal	Circuit Role	Design Meaning
1OEAB, 1OEBA, 2OEAB, 2OEBA	A↔B Output Enable (Active LOW)	Controls three-state output buffers independently per 8-bit channel; asserts high-impedance when HIGH.
1CEAB, 1CEBA, 2CEAB, 2CEBA	A↔B Data Path Enable (Active LOW)	Enables input capture or output reflection; must be LOW to allow data flow in respective direction.
1LEAB, 1LEBA, 2LEAB, 2LEBA	A↔B Latch Enable (Active LOW)	When pulsed LOW→HIGH, captures and holds A or B inputs; maintains stored state until next pulse.
A1–A16, B1–B16	Bidirectional Data I/O	Shared pins serving as inputs (when enabled toward latch) or three-state outputs (when enabled toward bus).
VCC, GND (×4 each)	Power & Ground	Distributed supply/return pins reduce IR drop and improve noise immunity across wide 56-pin layout.

Key Features

Feature	Design Value
I_off partial-power-down	Prevents back-current flow during system sleep or hot-swap events, eliminating need for external isolation circuitry.
Edge-rate controlled outputs	Reduces EMI and crosstalk in dense PCB layouts by limiting dV/dt without compromising speed.
Typical output skew < 250 ps	Ensures tight timing alignment across all 16 bits-critical for parallel bus integrity and setup/hold compliance.
Industrial temperature range	Validated operation from −40°C to +85°C supports deployment in factory automation, motor drives, and outdoor infrastructure.
High noise immunity	Input hysteresis (100 mV) and >2000-V HBM ESD rating protect against transient coupling in electrically noisy environments.

Applications

Industrial Backplane Interface	Legacy System Bus Extension
Use Scenario: Interfacing microcontroller local bus to extended ISA or VME-style backplane with long trace runs and high capacitance. IC Role / Device Role / Timing Role: Bidirectional latched transceiver providing level-shifted, noise-resilient data transfer between CPU and peripheral cards. Use Value: 64-mA sink drive and edge-rate control maintain signal fidelity across 100+ pF loads; 6.5-ns max delay preserves timing margins at 20-MHz bus rates.	Use Scenario: Upgrading aging 80C188-based controllers with modern FPGA co-processors while retaining existing 5-V bus architecture. IC Role / Device Role / Timing Role: Glue logic transceiver enabling synchronous handshaking and data staging between mismatched clock domains. Use Value: Independent LE/OE controls per 8-bit lane allow pipelined read/write operations; I_off support simplifies power sequencing during FPGA reconfiguration.
Automated Test Equipment (ATE) Channel Isolation	Programmable Logic Carrier Board
Use Scenario: Isolating DUT (device under test) signals from controller logic in modular ATE racks with hot-swappable modules. IC Role / Device Role / Timing Role: Direction-controlled buffer preventing signal contention during module insertion/removal. Use Value: I_off protection blocks backfeed when module is unpowered; 250-ps output skew ensures deterministic sampling across 16-bit test vectors.	Use Scenario: Providing configurable I/O expansion between Xilinx Spartan-6 FPGA and external ADCs/DACs on carrier boards. IC Role / Device Role / Timing Role: Latched interface synchronizing burst-mode sensor data transfers to FPGA fabric clock domain. Use Value: Dual-latch architecture decouples asynchronous peripheral timing from FPGA clock; 5-V tolerance accommodates legacy analog front-end ICs.

Industrial Backplane Interface

Legacy System Bus Extension

Use Scenario: Interfacing microcontroller local bus to extended ISA or VME-style backplane with long trace runs and high capacitance.

IC Role / Device Role / Timing Role: Bidirectional latched transceiver providing level-shifted, noise-resilient data transfer between CPU and peripheral cards.

Use Value: 64-mA sink drive and edge-rate control maintain signal fidelity across 100+ pF loads; 6.5-ns max delay preserves timing margins at 20-MHz bus rates.

Use Scenario: Upgrading aging 80C188-based controllers with modern FPGA co-processors while retaining existing 5-V bus architecture.

IC Role / Device Role / Timing Role: Glue logic transceiver enabling synchronous handshaking and data staging between mismatched clock domains.

Use Value: Independent LE/OE controls per 8-bit lane allow pipelined read/write operations; I_off support simplifies power sequencing during FPGA reconfiguration.

Automated Test Equipment (ATE) Channel Isolation

Programmable Logic Carrier Board

Use Scenario: Isolating DUT (device under test) signals from controller logic in modular ATE racks with hot-swappable modules.

IC Role / Device Role / Timing Role: Direction-controlled buffer preventing signal contention during module insertion/removal.

Use Value: I_off protection blocks backfeed when module is unpowered; 250-ps output skew ensures deterministic sampling across 16-bit test vectors.

Use Scenario: Providing configurable I/O expansion between Xilinx Spartan-6 FPGA and external ADCs/DACs on carrier boards.

IC Role / Device Role / Timing Role: Latched interface synchronizing burst-mode sensor data transfers to FPGA fabric clock domain.

Use Value: Dual-latch architecture decouples asynchronous peripheral timing from FPGA clock; 5-V tolerance accommodates legacy analog front-end ICs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY74FCT16543CTPVC	Slower 5.1-ns max propagation delay; SSOP package (300-mil width, 0.65-mm pitch); same drive strength and I_off.	Better suited for cost-sensitive, lower-speed designs where board space allows wider SSOP footprint.	Select when prioritizing legacy SSOP compatibility over compact TSSOP layout or marginal speed gain.
74FCT162543ATPACT	24-mA balanced drivers (vs. 64/32 mA asymmetrical); reduced ground bounce (<0.6 V); no bus-hold; same TSSOP-56 package.	Optimized for transmission-line driving (e.g., LVDS stubs, point-to-point links) rather than high-capacitance backplanes.	Choose for impedance-controlled routing or when minimizing simultaneous switching noise outweighs raw drive strength.

Compared with CY74FCT16543CTPVC and 74FCT162543ATPACT, the 74FCT16543ATPACTG4 offers the best balance of high sink current, compact TSSOP packaging, and 6.5-ns speed-making it optimal for space-constrained industrial backplanes needing robust drive and noise control.

Availability

74FCT16543ATPACTG4 is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy bus extensions, and automated test equipment requiring stable component supply, RoHS-compliant green packaging, and long-term lifecycle support.

Supply support for 74FCT16543ATPACTG4 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 industrial-grade reliability validation.

The 74FCT16543ATPACTG4 belongs to TI's FCT logic family, engineered for high-noise-immunity 5-V digital interfacing in demanding industrial and instrumentation systems where timing precision and power-down safety are critical.

FAQ

What is the maximum operating frequency supported by the 74FCT16543ATPACTG4?

The 74FCT16543ATPACTG4 does not specify a maximum clock frequency but supports data transfer rates up to ~150 MHz based on its 6.5-ns maximum propagation delay in transparent mode. Actual achievable throughput depends on system-level timing margins, including setup/hold times (2.0 ns each) and board trace characteristics. For latched operation, the minimum LE pulse width is 4.0 ns, enabling reliable capture at multi-hundred-MHz control rates.

Does the 74FCT16543ATPACTG4 support hot-swap or partial-power-down operation?

Yes, the 74FCT16543ATPACTG4 integrates I_off circuitry that disables all outputs when VCC = 0 V, preventing damaging current backflow during hot-swap or staged power-up/down sequences. This feature eliminates the need for external power sequencing logic or isolation MOSFETs in mixed-supply systems, and is validated across the full −40°C to +85°C industrial temperature range.

How does the 74FCT16543ATPACTG4 differ from the 74FCT162543ATPACT in driver capability?

The 74FCT16543ATPACTG4 provides asymmetric 64-mA sink / 32-mA source drive optimized for driving heavy capacitive loads like backplanes, whereas the 74FCT162543ATPACT features balanced 24-mA drivers with built-in current-limiting resistors-reducing ground bounce to <0.6 V and minimizing need for external termination. Both use identical TSSOP-56 packaging and share control logic, but their output stages target distinct signal integrity requirements.

What package type and dimensions does the 74FCT16543ATPACTG4 use?

The 74FCT16543ATPACTG4 uses a 56-pin Thin Shrunk Small Outline Package (TSSOP), designated DGG per TI, with 0.5-mm lead pitch, 13.9–14.1 mm body width, and maximum 1.2-mm height. It complies with JEDEC MO-153 and features exposed copper pads for thermal relief and precise stencil design guidance for 0.125-mm-thick solder paste application.

Is the 74FCT16543ATPACTG4 pin-compatible with other members of the CY74FCT16543 family?

Yes, the 74FCT16543ATPACTG4 shares identical pinout and logic functionality with CY74FCT16543CTPVC, CY74FCT16543TPVC, and CY74FCT16543ATPACT across all 56 pins-including VCC/GND distribution, A/B I/O mapping, and control signal assignments. Speed grade differences (5.1 ns, 6.5 ns, 8.5 ns) and package variants (TSSOP vs. SSOP) do not affect pin compatibility or electrical interface behavior.

74FCT16543ATPACTG4 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:: Discontinued at Digi-Key

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:: 32mA, 64mA

Voltage - Supply:: 4.5V ~ 5.5V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 56-TSSOP

74FCT16543ATPACTG4 FAQ

1.How can I place an order for 74FCT16543ATPACTG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74FCT16543ATPACTG4 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 74FCT16543ATPACTG4 reliable?

The price and inventory of 74FCT16543ATPACTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT16543ATPACTG4 is usually 5 days.

3.What payment methods are accepted for 74FCT16543ATPACTG4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74FCT16543ATPACTG4 transactions.

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4.How is shipping managed for 74FCT16543ATPACTG4?

74FCT16543ATPACTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74FCT16543ATPACTG4 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 74FCT16543ATPACTG4?

For technical support, including 74FCT16543ATPACTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT16543ATPACTG4 requirements.

6.How does Aetrix verify that 74FCT16543ATPACTG4 is sourced from the original manufacturer or authorized distributors?

All 74FCT16543ATPACTG4 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 74FCT16543ATPACTG4 meets industry standards.

7.What is the process for return or replacement of 74FCT16543ATPACTG4?

All 74FCT16543ATPACTG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT16543ATPACTG4, 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 74FCT16543ATPACTG4 part is unused and in its original packaging.

Return procedure for 74FCT16543ATPACTG4:

1.Submit a request within 90 days.

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

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