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Texas Instruments CY74FCT16543ATPACT
- Part No.:
- CY74FCT16543ATPACT
- Manufacturer:
- Texas Instruments
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
CY74FCT16543ATPACT.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,956
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Product details
Overview
CY74FCT16543ATPACT 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 direction. It delivers 64 mA sink / 32 mA source drive strength at 5V, features typical output skew < 250 ps, and operates across −40°C to +85°C for industrial backplane and bus interface applications.
For engineers reviewing the CY74FCT16543ATPACT datasheet, CY74FCT16543ATPACT pinout, CY74FCT16543ATPACT application, or CY74FCT16543ATPACT equivalent, key selection criteria include its 6.5 ns propagation delay in transparent mode, Ioff partial-power-down support, edge-rate controlled outputs for noise reduction, and TSSOP-56 package compatibility with high-density PCB layouts.
Technical Context
The CY74FCT16543ATPACT implements dual 8-bit D-type latches with independent A-to-B and B-to-A control paths, enabling simultaneous or isolated data latching and three-state output control. Its logic architecture supports transparent mode (when LE is low) and storage mode (on LE low-to-high transition), with CE inputs qualifying data entry and OE inputs enabling/disabling output buffers.
It uses FCT-family CMOS technology with TTL-compatible input thresholds (VIH = 2.0 V, VIL = 0.8 V), incorporates Ioff circuitry to disable outputs during power-down, and features edge-rate control to minimize ground bounce (typical VOLP < 1.0 V at 5 V, 25°C) and system-level switching noise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 5 V ± 10% - fixed single-rail operation compatible with legacy 5V TTL/CMOS systems |
| Propagation Delay | 6.5 ns max (transparent mode) - enables reliable timing in 150+ MHz bus interfaces |
| Output Drive | 64 mA sink / 32 mA source - sufficient to drive heavy capacitive loads and unterminated backplanes |
| Input Thresholds | VIH = 2.0 V, VIL = 0.8 V - ensures robust interoperability with standard TTL logic families |
| Operating Temperature | −40°C to +85°C - qualified for industrial environments without derating |
| Ioff Support | Enabled at VCC = 0 V - prevents backflow current during partial power-down, protecting powered subsystems |
| ESD Rating | >2000 V HBM - meets industrial handling requirements without additional protection circuitry |
Pinout & Package
Package: 56-pin TSSOP (DGG), 240-mil body width, 0.5 mm pitch, 1.2 mm max height, JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–8, 11–18, 21–28, 31–38, 41–48, 51–56 | A-side or B-side data I/O | Bidirectional pins serving as inputs (A or B) or three-state outputs (B or A) depending on CE/OE state |
| 9, 10, 19, 20, 29, 30, 39, 40, 49, 50 | Control inputs (LEAB, LEBA, OEAB, OEBA, CEAB, CEBA) | Active-low asynchronous controls enabling independent latch transparency, storage, and output buffering per direction |
| 25, 55 | VCC | Primary 5V supply pins - dual VCC placement reduces power distribution inductance |
| 26, 56 | GND | Dual ground pins adjacent to VCC - improves power integrity and reduces ground bounce |
Key Features
| Feature | Design Value |
|---|---|
| Ioff partial-power-down | Disables all outputs when VCC = 0 V, preventing damaging back-current into powered sections of the system |
| Edge-rate controlled outputs | Reduces signal overshoot/undershoot and ground bounce, lowering EMI and improving signal integrity on shared buses |
| Typical output skew < 250 ps | Ensures tight timing alignment across all 16 bits, critical for synchronous parallel bus transfers |
| 64 mA sink capability | Drives high-capacitance traces (>100 pF) and unterminated stubs without external termination or buffering |
| Industrial temperature range | Validated operation from −40°C to +85°C without performance degradation or parameter drift |
Applications
| Industrial Backplane Interface | Legacy System Bus Extension |
|---|---|
Use Scenario: Interfacing microcontroller local bus to a 16-bit ISA-style backplane with long trace runs and multiple slot loads. IC Role / Device Role / Timing Role: Bidirectional latched transceiver providing level-shifted, noise-immune data transfer between CPU and peripheral cards. Use Value: 64 mA drive strength and edge-rate control maintain signal fidelity across 15 cm traces; Ioff allows safe hot-swap of peripheral cards while CPU remains powered. | Use Scenario: Extending an aging 80C188-based controller's data bus to add FPGA co-processing with synchronized handshaking. IC Role / Device Role / Timing Role: Latched buffer isolating CPU address/data phases from FPGA setup/hold timing constraints. Use Value: 6.5 ns transparent-mode delay and 2 ns setup/hold times align cleanly with 12 MHz CPU bus cycles; dual-latch architecture decouples read/write timing paths. |
| High-Density PCB Bus Isolation | Test Equipment Data Capture Interface |
Use Scenario: Segregating noisy motor-control logic from sensitive analog acquisition circuitry on a compact 6-layer board. IC Role / Device Role / Timing Role: Direction-controlled isolation barrier with latch synchronization to prevent metastability during domain crossing. Use Value: Independent OE/LE controls allow precise timing of data capture windows; low ground bounce (<1.0 V) avoids coupling noise into adjacent analog traces. | Use Scenario: Capturing parallel 16-bit waveform data from a high-speed DAC at 10 MS/s into a test instrument's memory buffer. IC Role / Device Role / Timing Role: High-fidelity data capture latch synchronizing asynchronous DAC output to internal sampling clock. Use Value: Sub-250 ps output skew preserves waveform edge alignment across all 16 bits; 5V tolerance matches legacy DAC output swing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit latched transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY74FCT16543CTPVC | SSOP-56 package, 5.1 ns max propagation delay, same drive strength and control logic | Requires larger PCB footprint (300-mil vs. 240-mil width); better thermal dissipation in convection-cooled enclosures | Select when board layout prioritizes thermal margin over density, or when SSOP is already standardized in production. |
| CY74FCT162543ATPACT | 24 mA balanced output drivers, reduced ground bounce (VOLP < 0.6 V), no high-drive sink capability | Optimized for transmission-line driving with series termination; unsuitable for heavy capacitive loads or backplane stubs | Select when interfacing to controlled-impedance traces (e.g., 50 Ω), where lower drive and tighter noise control outweigh raw current capability. |
Compared with CY74FCT16543CTPVC, the CY74FCT16543ATPACT offers higher board density via TSSOP packaging and slightly relaxed timing (6.5 ns vs. 5.1 ns), while retaining identical logic functionality and drive strength; compared with CY74FCT162543ATPACT, it provides stronger sink current for legacy backplane loads but lacks bus hold and has higher ground bounce.
Availability
CY74FCT16543ATPACT is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy bus extensions, high-density PCB isolation, and test equipment data capture requiring stable component supply and long-term lifecycle support.
Supply support for CY74FCT16543ATPACT 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 CY74FCT16543ATPACT belongs to TI's FCT logic family, designed specifically for robust 5V bus interfacing in noise-sensitive industrial and instrumentation systems requiring high drive, latch synchronization, and partial-power-down safety.
FAQ
What is the maximum propagation delay of the CY74FCT16543ATPACT in transparent mode?
The CY74FCT16543ATPACT has a maximum propagation delay of 6.5 ns in transparent mode (A-to-B or B-to-A), measured under industrial conditions (VCC = 4.5 V to 5.5 V, TA = −40°C to +85°C). This value is specified in the Switching Characteristics table and applies to both directions when CE and LE are asserted and OE is active.
Does the CY74FCT16543ATPACT support partial power-down operation?
Yes, the CY74FCT16543ATPACT supports partial power-down via its Ioff circuitry. When VCC = 0 V, all outputs are disabled and high-impedance, preventing damaging current backflow from powered system sections into the unpowered device - a critical feature for hot-swap and modular system designs.
What package type and dimensions does the CY74FCT16543ATPACT use?
The CY74FCT16543ATPACT uses a 56-pin TSSOP (Thin Shrunk Small Outline Package) with drawing code DGG, 240-mil body width, 0.5 mm lead pitch, and 1.2 mm maximum height. Its JEDEC MO-153-compliant footprint measures 13.9–14.1 mm × 6.0–6.2 mm, optimized for high-density PCB layouts.
Can the CY74FCT16543ATPACT drive unterminated backplane traces?
Yes, the CY74FCT16543ATPACT can drive unterminated backplane traces due to its 64 mA sink current capability and edge-rate controlled outputs. This design minimizes reflections and ground bounce, allowing reliable operation on traces up to ~15 cm with typical 50–100 pF loading without external termination resistors.
What are the input voltage thresholds for TTL compatibility on the CY74FCT16543ATPACT?
The CY74FCT16543ATPACT features TTL-compatible input thresholds: VIH (input HIGH voltage) is guaranteed ≥ 2.0 V, and VIL (input LOW voltage) is guaranteed ≤ 0.8 V, ensuring interoperability with standard 5V TTL logic families without level-shifting circuitry.
CY74FCT16543ATPACT 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:
- 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
CY74FCT16543ATPACT FAQ
1.How can I place an order for CY74FCT16543ATPACT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT16543ATPACT 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 CY74FCT16543ATPACT reliable?
The price and inventory of CY74FCT16543ATPACT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT16543ATPACT is usually 5 days.
3.What payment methods are accepted for CY74FCT16543ATPACT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT16543ATPACT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT16543ATPACT?
CY74FCT16543ATPACT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT16543ATPACT 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 CY74FCT16543ATPACT?
For technical support, including CY74FCT16543ATPACT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT16543ATPACT requirements.
6.How does Aetrix verify that CY74FCT16543ATPACT is sourced from the original manufacturer or authorized distributors?
All CY74FCT16543ATPACT 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 CY74FCT16543ATPACT meets industry standards.
7.What is the process for return or replacement of CY74FCT16543ATPACT?
All CY74FCT16543ATPACT units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT16543ATPACT, 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 CY74FCT16543ATPACT part is unused and in its original packaging.
Return procedure for CY74FCT16543ATPACT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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