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Texas Instruments CY74FCT163543CPAC
- Part No.:
- CY74FCT163543CPAC
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
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CY74FCT163543CPAC.pdf
- Description:
- BUS TRANSCEIVER, FCT SERIES
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Product details
Overview
CY74FCT163543CPAC from Texas Instruments is a 16-bit latched transceiver organized as two independent 8-bit D-type latched transceivers, supporting bidirectional A↔B data flow with separate latch and output enables per direction. It operates at 2.7V–3.6V, delivers 24 mA balanced drive, achieves 5.1 ns propagation delay in transparent mode, and features 5V-tolerant I/O for mixed-voltage system interfacing - used in high-speed bus isolation and level translation between 3.3V logic domains and legacy 5V peripherals.
For engineers reviewing the CY74FCT163543CPAC datasheet, CY74FCT163543CPAC pinout, CY74FCT163543CPAC application, or CY74FCT163543CPAC equivalent, key selection criteria include its dual 8-bit latch control architecture, live-insertion support via power-off disable, edge-rate controlled outputs for EMI reduction, and TSSOP-56 packaging compatible with industrial temperature range (–40°C to +85°C) requirements.
Technical Context
The CY74FCT163543CPAC implements two fully independent 8-bit latched transceiver channels: one for A-to-B and one for B-to-A data paths, each with dedicated CE, LE, and OE controls. Its latch-enable logic requires a LOW-to-HIGH transition on LEAB/LEBA to store data, while CEAB/CEBA enables input capture and OEAB/OEBA gates three-state output drivers.
It uses FCT-C core technology with current-limiting resistors integrated into 24 mA balanced output drivers, minimizing ground bounce (Volp) and eliminating need for external termination. Inputs and outputs tolerate up to 7.0 V, enabling safe interfacing with 5V buses while powered from 3.3V supply - critical for voltage translation without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - ensures compatibility with 3.3V logic systems and rejects noise-induced false triggering below 2.7V. |
| Propagation Delay (tPLH/tPHL) | 5.1 ns max (A↔B transparent mode) - supports >100 MHz bus timing margins in high-speed backplane or memory interface applications. |
| Output Drive Strength | ±24 mA balanced - provides robust signal integrity across PCB traces up to 15 cm without external termination. |
| Input Voltage Tolerance | −0.5 V to +7.0 V - allows direct connection to 5V TTL/CMOS buses without clamping diodes or translators. |
| Power-Off Disable | IOFF ≤ +100 µA at VCC = 0 V - enables hot-plug capability in modular backplanes without bus contention. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded control and telecom infrastructure deployment. |
| Output Skew | Typical < 250 ps - guarantees simultaneous switching of all 16 bits for coherent data capture in parallel bus architectures. |
Pinout & Package
Package: 56-pin TSSOP (DGG), 19.6-mil pitch, JEDEC MO-153 compliant, body dimensions 13.90 mm × 6.00 mm × 1.20 mm max.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEAB, 2OEAB, 1OEBA, 2OEBA | A↔B Output Enable (Active LOW) | Controls three-state output drivers independently per 8-bit channel - enables dynamic bus sharing without contention. |
| 1CEAB, 2CEAB, 1CEBA, 2CEBA | A↔B Enable (Active LOW) | Gates data flow direction: LOW enables input sampling or output driving; HIGH isolates both sides. |
| 1LEAB, 2LEAB, 1LEBA, 2LEBA | A↔B Latch Enable (Active LOW) | LOW makes latches transparent; LOW-to-HIGH edge captures and holds A or B data for synchronous transfer. |
| A1–A8, B1–B8 (x2 sets) | Bidirectional Data I/O | Shared pins serving as inputs (when CE active) or three-state outputs (when OE active) - reduces pin count vs. separate I/O banks. |
| VCC, GND (x4 each) | Power & Ground | Distributed VCC/GND pairs minimize IR drop and supply noise across high-speed switching activity. |
Key Features
| Feature | Design Value |
|---|---|
| 5V-tolerant I/O | Supports direct interface to 5V buses while operating at 3.3V VCC - eliminates external level translators in mixed-voltage systems. |
| Edge-rate controlled outputs | Reduces EMI and overshoot/undershoot by limiting slew rate - meets Class B radiated emissions without added filtering. |
| Power-off disable | Outputs enter high-Z state when VCC = 0 V - prevents back-driving and bus conflicts during hot-swap insertion/removal. |
| Low ground bounce (Volp) | Typical performance exceeds MIL-STD-883D - maintains signal integrity under heavy simultaneous switching conditions. |
| FCT-C speed grade | 5.1 ns max propagation delay - enables use in 100+ MHz parallel bus applications such as PCI-X stubs or FPGA I/O expansion. |
Applications
| Industrial Backplane Interface | FPGA I/O Expansion Bridge |
|---|---|
|
Use Scenario: Isolating and translating control/data signals between a 3.3V FPGA carrier board and legacy 5V peripheral modules on a modular rack system. IC Role / Device Role / Timing Role: Bidirectional latched transceiver providing synchronized, glitch-free handshaking between voltage domains with independent enable control per 8-bit lane. Use Value: Eliminates need for discrete level shifters and reduces PCB layer count via flow-through pinout - improves signal integrity with <250 ps output skew across all 16 lines. |
Use Scenario: Extending parallel address/data bus from a Xilinx Spartan-6 FPGA to external SRAM and CPLD-based glue logic operating at 5V. IC Role / Device Role / Timing Role: Latched transceiver acting as timing-isolated bus repeater with CE/LE/OE staging to meet setup/hold timing across clock domain boundaries. Use Value: 5.1 ns propagation delay and 2.0 ns setup/hold times enable reliable operation at 80 MHz bus clocks - verified per TI's switching characteristics table. |
| Telecom Line Card Bus Isolation | Automated Test Equipment (ATE) Signal Conditioning |
|
Use Scenario: Segregating control plane (3.3V) from data plane (5V) on a multi-slot telecom line card with hot-swap capability. IC Role / Device Role / Timing Role: Hot-plug–capable transceiver with power-off disable ensuring zero bus contention during module insertion/removal under live power. Use Value: IOFF ≤ +100 µA at VCC = 0 V guarantees no leakage current into powered backplane - critical for NEBS-compliant designs. |
Use Scenario: Driving high-fanout test vectors from a 3.3V pattern generator to multiple 5V DUTs while maintaining precise timing alignment. IC Role / Device Role / Timing Role: Precision-latched driver delivering matched edge rates and sub-250 ps inter-output skew for deterministic vector launch. Use Value: Edge-rate control and balanced ±24 mA drive ensure clean 100 Mbps digital waveforms without ringing - validated by TI's Volp and EMI test data. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar latched transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74FCT163543CPAG | Same functional spec, SSOP-56 package (O56), 25-mil pitch - larger footprint, higher thermal resistance than TSSOP. | Preferred where board reflow profile favors SSOP or legacy tooling exists for O56 land patterns. | Select when mechanical compatibility with existing SSOP layouts is required; not pin-compatible due to different pitch and pad geometry. |
| 74ALVC163543MTDX | Lower drive (±24 mA same), but wider VCC range (1.65V–3.6V); no 5V tolerance - requires external clamping for 5V bus interfacing. | Suitable only in pure 3.3V or dual-supply 1.8V/3.3V systems without 5V legacy interfaces. | Choose only if 5V tolerance is unnecessary and lower static power (ICC typ. 0.1 µA) is prioritized over mixed-voltage flexibility. |
Compared with CY74FCT163543CPAC, SN74FCT163543CPAG offers identical electrical behavior but demands SSOP layout changes, while 74ALVC163543MTDX sacrifices 5V tolerance for broader low-voltage operation - making CY74FCT163543CPAC uniquely suited for industrial 3.3V-to-5V bridging where live insertion and EMI control are mandatory.
Availability
CY74FCT163543CPAC is available at Aetrix Electronics and suitable for industrial backplane interfaces, FPGA I/O expansion bridges, telecom line card bus isolation, and automated test equipment signal conditioning requiring stable component supply and long-term lifecycle support.
Supply support for CY74FCT163543CPAC 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The CY74FCT163543CPAC belongs to TI's FCT logic family, designed specifically for high-speed, low-noise, mixed-voltage bus interfacing in industrial and telecom infrastructure where reliability, latch synchronization, and hot-swap safety are critical.
FAQ
What is the maximum operating frequency supported by the CY74FCT163543CPAC in transparent mode?
The CY74FCT163543CPAC supports reliable operation up to approximately 100 MHz in transparent mode, based on its 5.1 ns maximum propagation delay (tPLH/tPHL) and 2.0 ns minimum setup/hold times. This enables use in high-speed parallel bus applications such as FPGA-to-SRAM interfaces or backplane data lanes where timing closure is critical. The CY74FCT163543CPAC datasheet confirms these values under VCC = 3.0V–3.6V and TA = –40°C to +85°C.
Does the CY74FCT163543CPAC support hot-plug insertion?
Yes, the CY74FCT163543CPAC supports live insertion via its power-off disable feature: when VCC = 0 V, output leakage current (IOFF) is limited to +100 µA, ensuring outputs remain in high-impedance state without back-driving powered bus lines. This behavior is explicitly characterized in the Electrical Characteristics table and enables safe use in modular telecom and industrial chassis systems - a key design requirement confirmed for the CY74FCT163543CPAC.
What is the pin pitch and JEDEC standard for the CY74FCT163543CPAC package?
The CY74FCT163543CPAC uses a 56-pin TSSOP package (TI package code DGG) with 0.5 mm (19.6-mil) pin pitch and complies with JEDEC MO-153 mechanical standard. Its body dimensions are 13.90 mm × 6.00 mm × 1.20 mm max, and the gage plane and seating plane tolerances are defined in TI's MTSS003D mechanical drawing - all verified for the exact CY74FCT163543CPAC ordering code.
Can the CY74FCT163543CPAC interface directly with 5V TTL logic while powered at 3.3V?
Yes, the CY74FCT163543CPAC has 5V-tolerant inputs and outputs, specified for DC input voltages from −0.5 V to +7.0 V and output voltages up to +7.0 V. When powered at VCC = 3.3V, it safely accepts and drives 5V logic levels without damage or level-shifting circuitry - a core feature documented in the Absolute Maximum Ratings and Electrical Characteristics tables for CY74FCT163543CPAC.
How many independent latch control groups does the CY74FCT163543CPAC provide?
The CY74FCT163543CPAC provides four independent latch control groups: two per direction (A→B and B→A), each with dedicated Latch Enable (LEAB/LEBA) and Chip Enable (CEAB/CEBA) inputs. This allows asynchronous latching of A-side or B-side data in either direction, enabling flexible handshake protocols in bidirectional bus architectures - a structural feature confirmed in the Functional Description and Logic Block Diagram of the CY74FCT163543CPAC datasheet.
CY74FCT163543CPAC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
CY74FCT163543CPAC FAQ
1.How can I place an order for CY74FCT163543CPAC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT163543CPAC 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 CY74FCT163543CPAC reliable?
The price and inventory of CY74FCT163543CPAC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT163543CPAC is usually 5 days.
3.What payment methods are accepted for CY74FCT163543CPAC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT163543CPAC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT163543CPAC?
CY74FCT163543CPAC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT163543CPAC 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 CY74FCT163543CPAC?
For technical support, including CY74FCT163543CPAC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT163543CPAC requirements.
6.How does Aetrix verify that CY74FCT163543CPAC is sourced from the original manufacturer or authorized distributors?
All CY74FCT163543CPAC 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 CY74FCT163543CPAC meets industry standards.
7.What is the process for return or replacement of CY74FCT163543CPAC?
All CY74FCT163543CPAC units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT163543CPAC, 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 CY74FCT163543CPAC part is unused and in its original packaging.
Return procedure for CY74FCT163543CPAC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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