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Texas Instruments CY74FCT16543ETPVC
- Part No.:
- CY74FCT16543ETPVC
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
CY74FCT16543ETPVC.pdf
- Description:
- BUS TRANSCEIVER, FCT SERIES
- Quantity:
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Inventory:4,957
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Product details
Overview
CY74FCT16543ETPVC 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 between A and B buses with separate Latch Enable (LEAB/LEBA) and Output Enable (OEAB/OEBA) controls. It delivers 64 mA sink / 32 mA source drive, <250 ps typical output skew, and operates at 5V ±10% across −40°C to +85°C for industrial backplane and high-capacitance load interfacing.
For engineers reviewing the CY74FCT16543ETPVC datasheet, CY74FCT16543ETPVC pinout, CY74FCT16543ETPVC application, or CY74FCT16543ETPVC equivalent, key selection criteria include its 8.5 ns propagation delay in transparent mode, Ioff partial-power-down support, edge-rate controlled noise performance, and SSOP-56 package compatibility with legacy 300-mil footprint designs.
Technical Context
The CY74FCT16543ETPVC implements dual 8-bit latch architecture with independent A-to-B and B-to-A control paths, each featuring dedicated CEAB/CEBA enable inputs, LEAB/LEBA latch strobes, and OEAB/OEBA three-state output enables. Its TTL-compatible input thresholds (VIH = 2.0 V, VIL = 0.8 V) and hysteresis (100 mV) ensure robust noise immunity in mixed-signal environments.
It uses standard FCT logic with CMOS-compatible inputs and bipolar-driven outputs, enabling direct interface with both TTL and CMOS systems. The device incorporates Ioff circuitry to disable outputs during power-down, preventing damaging current backflow, and features edge-rate control to minimize ground bounce (VOLP < 0.55 V at 64 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 5 V ±10% - fixed single-rail operation; no dual-supply or level-shifting capability |
| Propagation Delay | 8.5 ns max (A↔B transparent mode) - defines maximum data throughput latency in bus bridging |
| Output Drive | 64 mA sink / 32 mA source - sufficient to drive 50-Ω transmission lines or high-capacitance PCB traces |
| Output Skew | <250 ps typical - ensures tight timing alignment across all 16 bits for synchronous bus applications |
| Operating Temp | −40°C to +85°C - qualified for industrial ambient conditions without derating |
| Ioff Support | Enabled - allows safe partial-power-down of one side while maintaining isolation on powered side |
| ESD Rating | >2000 V HBM - meets basic handling robustness requirements for assembly and field use |
Pinout & Package
Package: 56-pin SSOP (Shrink Small Outline Package), 300-mil body width (18.29 mm × 7.49 mm), 25-mil pitch (0.635 mm), JEDEC MO-118 compliant, RoHS-compliant NIPDAU lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEAB, 1OEBA, 2OEAB, 2OEBA | A/B Output Enable (Active LOW) | Controls three-state output drivers per 8-bit section; asserts low to enable A↔B data transfer |
| 1CEAB, 1CEBA, 2CEAB, 2CEBA | A/B Bus Enable (Active LOW) | Gates data path directionality; must be low for latch transparency or output activation |
| 1LEAB, 1LEBA, 2LEAB, 2LEBA | A/B Latch Enable (Active LOW) | Strobes data into internal D-latches on rising edge; determines storage vs. transparent behavior |
| A1–A8, B1–B8 (x2 sections) | Bidirectional Data I/O | Shared pins serving as inputs (latching) or three-state outputs (driving); no internal direction register |
| VCC, GND (x4 each) | Power & Ground | Distributed supply/ground pins reduce simultaneous switching noise and improve PDN stability |
Key Features
| Feature | Design Value |
|---|---|
| Ioff partial-power-down | Prevents back-current flow when VCC = 0 V, enabling hot-swap and mixed-voltage system partitioning |
| Edge-rate controlled outputs | Reduces EMI and ground bounce, achieving VOLP < 0.55 V at full 64 mA sink current |
| Dual independent 8-bit latches | Enables asynchronous A→B and B→A data transfers without contention or arbitration logic |
| Industrial temperature range | Guarantees parametric performance from −40°C to +85°C without thermal derating or guardbanding |
| TTL-compatible input thresholds | Accepts standard 0.8 V / 2.0 V logic levels, eliminating need for external level translators in 5-V systems |
Applications
| Backplane Interface | Industrial PLC I/O Module |
|---|---|
Use Scenario: Interfacing microcontroller local bus to a 16-bit parallel backplane carrying sensor data and control commands across multiple chassis slots. IC Role / Device Role / Timing Role: Bidirectional latched transceiver providing isolated, skew-controlled data handoff between CPU and backplane, synchronized by discrete LE/OE signals. Use Value: 8.5 ns propagation delay and <250 ps skew maintain timing integrity across 16-bit wide parallel transfers at up to 20 MHz sustained rate. | Use Scenario: Buffering and isolating field I/O signals (digital inputs/outputs) from the main controller in an industrial programmable logic controller rack. IC Role / Device Role / Timing Role: Level-shifting and drive-strengthening transceiver managing signal flow between isolated field-side and controller-side PCBs via ribbon cable. Use Value: 64 mA sink capability drives LED indicators and relay coils directly; Ioff prevents fault propagation during module hot-swap. |
| Legacy System Upgrade Bridge | Test Equipment Data Acquisition |
Use Scenario: Replacing obsolete 74ACT or 74AS logic in aging test instrumentation where board space and footprint are constrained. IC Role / Device Role / Timing Role: Pin-compatible functional replacement for discontinued 16-bit transceivers, retaining identical SSOP-56 layout and control signal mapping. Use Value: Same 300-mil SSOP footprint and 5-V operation eliminate PCB redesign; edge-rate control improves signal fidelity over original parts. | Use Scenario: Capturing parallel digital waveforms from DUTs in automated test equipment using high-speed acquisition ASICs. IC Role / Device Role / Timing Role: Synchronizing and buffering 16-bit parallel data streams between DUT interface and acquisition FIFO, with precise latch timing control. Use Value: Set-up/hold times of 2.0 ns and LE pulse width of 4.0 ns enable reliable capture at >50 MHz effective sampling rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar latched transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY74FCT16543TPVC | Same core logic, but rated for 8.5 ns max propagation delay (vs. CY74FCT16543ETPVC's documented 8.5 ns spec); identical SSOP-56 package and pinout | No functional difference; TPVC is active production variant with same speed grade and qualification | Select CY74FCT16543TPVC for new designs requiring guaranteed long-term availability and TI's ACTIVE status |
| CY74FCT16543ATPACT | Faster 6.5 ns max propagation delay; TSSOP-56 (240-mil) package with 0.65 mm pitch vs. SSOP's 0.635 mm; different mechanical footprint | Requires PCB layout change; suited for space-constrained designs needing tighter timing margins | Choose CY74FCT16543ATPACT only if timing budget demands sub-7 ns latency and board redesign is acceptable |
Compared with CY74FCT16543TPVC and CY74FCT16543ATPACT, the CY74FCT16543ETPVC shares identical electrical specs and SSOP-56 mechanical form factor with the TPVC variant but is marked OBSOLETE by TI; the ATPACT offers superior speed at the cost of incompatible packaging and layout revision.
Availability
CY74FCT16543ETPVC is available at Aetrix Electronics and suitable for industrial PLC I/O modules, legacy test equipment upgrades, and backplane interface designs requiring stable component supply and verified 5-V bus transceiver functionality.
Supply support for CY74FCT16543ETPVC 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 specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The CY74FCT16543 series belongs to TI's FCT logic family, designed specifically for high-speed, low-noise 5-V bus interfacing in industrial control, instrumentation, and computing infrastructure applications.
FAQ
What is the maximum propagation delay specification for CY74FCT16543ETPVC?
The CY74FCT16543ETPVC has a maximum propagation delay of 8.5 ns in transparent mode (A↔B data flow), measured under standard conditions of VCC = 5 V ±10%, TA = −40°C to +85°C. This value is consistent across both A-to-B and B-to-A directions and applies to the SSOP-56 package variant.
Does CY74FCT16543ETPVC support partial-power-down operation?
Yes, CY74FCT16543ETPVC supports partial-power-down via its Ioff circuitry. When VCC = 0 V, the outputs are disabled and high-impedance, preventing damaging current backflow from live buses into the unpowered device - a critical feature for hot-swap and modular system architectures.
What package type and dimensions does CY74FCT16543ETPVC use?
CY74FCT16543ETPVC uses a 56-pin SSOP (Shrink Small Outline Package) with 300-mil body width (18.29 mm × 7.49 mm), 25-mil lead pitch (0.635 mm), and JEDEC MO-118 compliance. It is not offered in TSSOP or other variants - only the DL package drawing applies to this specific orderable part.
Can CY74FCT16543ETPVC replace older 74F or 74ACT transceivers in existing designs?
Yes, CY74FCT16543ETPVC is functionally and pin-compatible with many legacy 16-bit transceivers such as 74F16543 and 74ACT16543 in SSOP-56 packages. Its 5-V operation, TTL-compatible inputs, and identical pinout allow drop-in replacement - though designers should verify timing margins due to FCT's improved speed and reduced skew.
What are the key electrical differences between CY74FCT16543ETPVC and CY74FCT162543T variants?
CY74FCT16543ETPVC provides 64 mA sink / 32 mA source drive optimized for high-capacitance loads and backplanes, whereas CY74FCT162543T uses balanced 24 mA drivers with built-in current-limiting resistors to reduce ground bounce and transmission-line reflections - making it better suited for point-to-point line driving rather than bus loading.
CY74FCT16543ETPVC 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:
- -
CY74FCT16543ETPVC FAQ
1.How can I place an order for CY74FCT16543ETPVC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT16543ETPVC 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 CY74FCT16543ETPVC reliable?
The price and inventory of CY74FCT16543ETPVC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT16543ETPVC is usually 5 days.
3.What payment methods are accepted for CY74FCT16543ETPVC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT16543ETPVC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT16543ETPVC?
CY74FCT16543ETPVC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT16543ETPVC 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 CY74FCT16543ETPVC?
For technical support, including CY74FCT16543ETPVC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT16543ETPVC requirements.
6.How does Aetrix verify that CY74FCT16543ETPVC is sourced from the original manufacturer or authorized distributors?
All CY74FCT16543ETPVC 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 CY74FCT16543ETPVC meets industry standards.
7.What is the process for return or replacement of CY74FCT16543ETPVC?
All CY74FCT16543ETPVC units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT16543ETPVC, 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 CY74FCT16543ETPVC part is unused and in its original packaging.
Return procedure for CY74FCT16543ETPVC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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