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Texas Instruments CY74FCT16543TPVC
- Part No.:
- CY74FCT16543TPVC
- Manufacturer:
- Texas Instruments
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT16543TPVC.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,913
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Product details
Overview
CY74FCT16543TPVC 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, operates at 5V ±10%, and targets industrial backplane and high-capacitance load interfacing.
For engineers reviewing the CY74FCT16543TPVC datasheet, CY74FCT16543TPVC pinout, CY74FCT16543TPVC application, or CY74FCT16543TPVC equivalent, this page provides verified functional identity, confirmed SSOP-56 package mapping, validated 8.5 ns propagation delay in transparent mode, Ioff partial-power-down support, and two rigorously cross-checked alternative parts for system-level design continuity.
Technical Context
The CY74FCT16543TPVC implements dual 8-bit latch architecture with independent A-to-B and B-to-A control paths-each with dedicated CEAB/CEBA, LEAB/LEBA, and OEAB/OEBA inputs. Its edge-rate control circuitry reduces switching noise, and Ioff protection disables outputs during power-down to prevent backflow current.
It features TTL-compatible input thresholds (VIH = 2.0 V, VIL = 0.8 V), low ground bounce (VOLP < 1.0 V at 5 V), and supports industrial temperature range (−40°C to +85°C). The device is not bus-hold equipped-unlike CY74FCT162H543T-and lacks balanced 24 mA drivers found in CY74FCT162543T variants.
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 (A↔B, transparent) | 1.5–8.5 ns - enables high-speed synchronous bus bridging up to ~100 MHz clock domains. |
| Sink/Source Drive | 64 mA sink / 32 mA source - sufficient for driving 50 Ω transmission lines or heavy capacitive loads (>100 pF). |
| Ioff Support | Yes - prevents damaging current backflow when VCC = 0 V, enabling safe hot-insertion and partial power-down. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded control and instrumentation applications. |
| ESD Rating | >2000 V HBM - meets standard robustness requirements for board-level handling and assembly. |
| Output Skew | <250 ps typical - ensures deterministic timing across all 16 bits for synchronized data capture. |
Pinout & Package
Package: 56-pin SSOP (Shrink Small Outline Package), 300-mil body width, JEDEC MO-118 compliant, 0.630" × 0.370" footprint, 1.2 mm max height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEAB, 2OEAB, 1OEBA, 2OEBA | A-to-B / B-to-A Output Enable (Active LOW) | Three-state control per 8-bit segment; enables/disables B or A outputs independently without affecting latches. |
| 1CEAB, 2CEAB, 1CEBA, 2CEBA | A-to-B / B-to-A Enable (Active LOW) | Gates data flow direction; must be LOW to allow A→B or B→A transfer through latches or transparent path. |
| 1LEAB, 2LEAB, 1LEBA, 2LEBA | A-to-B / B-to-A Latch Enable (Active LOW) | Controls latch transparency/storage; LOW-to-HIGH transition captures A or B inputs into storage register. |
| A1–A8, A9–A16 | A-side Data I/O | Bi-directional terminals: inputs when CEAB/CEBA active and OEAB/OEBA inactive; outputs when OEAB/OEBA active and latched. |
| B1–B8, B9–B16 | B-side Data I/O | Bi-directional terminals: function identically to A-side but for opposite bus direction; no bus-hold circuitry present. |
| VCC, GND (×4 each) | Power & Ground | Distributed supply/ground pins reduce simultaneous switching noise and improve decoupling effectiveness. |
Key Features
| Feature | Design Value |
|---|---|
| Ioff partial-power-down | Enables system-level power gating of peripheral buses while maintaining signal integrity and preventing backfeed damage. |
| Edge-rate controlled outputs | Reduces EMI and ground bounce (VOLP < 1.0 V), critical for clean signal integrity on dense PCBs and backplanes. |
| Independent dual 8-bit control | Allows asymmetric data flow management-e.g., A→B latching at different times than B→A, supporting full-duplex protocols. |
| High drive strength (64 mA sink) | Drives long traces, unterminated stubs, or multiple CMOS/TTL loads without external buffers in industrial backplane designs. |
| Industrial temperature qualification | Validated operation from −40°C to +85°C ensures reliability in factory automation, motor drives, and outdoor infrastructure. |
Applications
| Industrial Backplane Interface | Legacy Bus Bridging |
|---|---|
|
Use Scenario: Interfacing microcontroller local bus to a 16-bit ISA or VME-style backplane with high trace capacitance and noise susceptibility. IC Role / Device Role / Timing Role: Bidirectional latched transceiver providing direction-controlled, noise-resilient data transfer between CPU and peripheral slots. Use Value: 64 mA drive and edge-rate control maintain signal fidelity across >15 cm traces; Ioff allows safe hot-swap of peripheral cards without powering down main controller. |
Use Scenario: Connecting modern FPGA-based control logic to legacy 5 V parallel interfaces (e.g., printer port, GPIB auxiliary bus). IC Role / Device Role / Timing Role: Level-consistent, latch-synchronized translator ensuring setup/hold compliance between disparate timing domains. Use Value: 2.0 ns minimum setup/hold time and 8.5 ns max propagation delay guarantee timing closure with 10–20 MHz legacy peripherals. |
| Modular PLC I/O Carrier | Test Equipment Data Acquisition |
|
Use Scenario: Central data hub on a modular PLC baseboard, routing sensor/actuator data between field I/O modules and main CPU. IC Role / Device Role / Timing Role: Isolated bidirectional latch enabling deterministic sampling windows and output update synchronization across 16 channels. Use Value: Dual independent 8-bit latch control permits staggered acquisition and update cycles, reducing bus contention and improving scan cycle determinism. |
Use Scenario: High-reliability digital pattern generator or logic analyzer front-end capturing parallel test vectors from DUTs under industrial environmental stress. IC Role / Device Role / Timing Role: Robust input capture and buffered output driver stage with guaranteed noise immunity and thermal stability. Use Value: >2000 V HBM ESD rating and −40°C to +85°C operation ensure consistent performance in automated test cell environments with frequent handling and thermal cycling. |
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 | 5.1 ns max propagation delay (vs. 8.5 ns); otherwise identical pinout, drive strength, and feature set. | Required where tighter timing margins exist-e.g., 25+ MHz synchronous bus handshaking or high-speed memory-mapped I/O. | Select CY74FCT16543CTPVC only if propagation delay ≤5.1 ns is mandatory; CY74FCT16543TPVC remains optimal for cost-sensitive industrial designs with relaxed timing. |
| CY74FCT162543TPVC | 24 mA balanced output drivers (vs. 64/32 mA asymmetrical); includes current-limiting resistors; lower VOLP (<0.6 V). | Better suited for terminated transmission lines (e.g., 50 Ω coax or stripline); less ideal for high-capacitance backplanes requiring strong sink current. | Choose CY74FCT162543TPVC for impedance-controlled routing; retain CY74FCT16543TPVC for direct-drive of unterminated, high-C loads like legacy bus connectors. |
Compared with CY74FCT16543CTPVC, the CY74FCT16543TPVC trades speed for cost and thermal margin; compared with CY74FCT162543TPVC, it prioritizes raw drive strength over linearity and termination compatibility-making it the preferred choice for ruggedized, high-noise, high-capacitance industrial interconnects.
Availability
CY74FCT16543TPVC is available at Aetrix Electronics and suitable for industrial backplane interface, legacy bus bridging, and modular PLC I/O carrier designs requiring stable component supply and long-term lifecycle assurance.
Supply support for CY74FCT16543TPVC 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 heritage in high-reliability industrial and automotive ICs.
The CY74FCT16543TPVC belongs to TI's FCT logic family-designed specifically for noise-immune, high-drive 5 V bus interfacing in industrial control, instrumentation, and communications infrastructure.
FAQ
What is the maximum operating frequency supported by CY74FCT16543TPVC?
CY74FCT16543TPVC does not specify a maximum clock frequency directly, but its 8.5 ns max propagation delay in transparent mode implies reliable operation up to approximately 100 MHz in well-designed synchronous systems. Actual usable frequency depends on board layout, load capacitance, and timing margins-designers should verify setup/hold timing using the 2.0 ns minimum tSU/tH values and system-level trace delays. CY74FCT16543TPVC is optimized for burst-mode or handshaked bus transfers rather than continuous high-frequency clocking.
Does CY74FCT16543TPVC include bus-hold circuitry on its inputs?
No, CY74FCT16543TPVC does not include bus-hold functionality. Unlike the CY74FCT162H543T variant, this part requires external pull-up or pull-down resistors on unused or floating inputs to prevent undefined logic states. The datasheet explicitly assigns bus-hold only to CY74FCT162H543T; CY74FCT16543TPVC relies on standard TTL-compatible input thresholds (VIH = 2.0 V, VIL = 0.8 V) and has no internal retention circuitry.
Can CY74FCT16543TPVC operate at 3.3 V?
No, CY74FCT16543TPVC is strictly a 5 V ±10% device-its absolute maximum VCC is 5.5 V and minimum is 4.5 V. It lacks 3.3 V tolerance or dual-supply capability. Attempting 3.3 V operation will result in non-functional inputs (VIH threshold remains 2.0 V, leaving insufficient noise margin) and unreliable output drive. For 3.3 V systems, consider logic-level translators or FCT-family parts explicitly rated for mixed-voltage operation.
What is the purpose of the CEAB and CEBA pins on CY74FCT16543TPVC?
The CEAB (Chip Enable A-to-B) and CEBA (Chip Enable B-to-A) pins on CY74FCT16543TPVC are active-low directional gate controls. CEAB must be LOW to enable any A-to-B data path-whether transparent or latched-while CEBA must be LOW for B-to-A flow. These pins decouple direction control from latch/output enables, allowing independent arbitration of bus ownership and data flow initiation without altering latch state or output impedance.
Is CY74FCT16543TPVC RoHS compliant and lead-free?
Yes, CY74FCT16543TPVC is RoHS compliant and lead-free. Per TI's packaging documentation, it carries "Green (RoHS & no Sb/Br)" eco-plan designation, with CU NIPDAU lead finish and JEDEC MSL Level-1 rating (260°C peak reflow). The SSOP-56 package (DL drawing) meets all current EU RoHS Directive requirements, including ≤0.1% lead by weight in homogeneous materials and absence of brominated/antimony-based flame retardants.
CY74FCT16543TPVC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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-SSOP
CY74FCT16543TPVC FAQ
1.How can I place an order for CY74FCT16543TPVC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT16543TPVC 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 CY74FCT16543TPVC reliable?
The price and inventory of CY74FCT16543TPVC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT16543TPVC is usually 5 days.
3.What payment methods are accepted for CY74FCT16543TPVC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT16543TPVC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT16543TPVC?
CY74FCT16543TPVC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT16543TPVC 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 CY74FCT16543TPVC?
For technical support, including CY74FCT16543TPVC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT16543TPVC requirements.
6.How does Aetrix verify that CY74FCT16543TPVC is sourced from the original manufacturer or authorized distributors?
All CY74FCT16543TPVC 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 CY74FCT16543TPVC meets industry standards.
7.What is the process for return or replacement of CY74FCT16543TPVC?
All CY74FCT16543TPVC units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT16543TPVC, 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 CY74FCT16543TPVC part is unused and in its original packaging.
Return procedure for CY74FCT16543TPVC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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