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Texas Instruments CY74FCT16646TPVCT
- Part No.:
- CY74FCT16646TPVCT
- Manufacturer:
- Texas Instruments
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT16646TPVCT.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,357
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Product details
Overview
CY74FCT16646TPVCT from Texas Instruments is a 16-bit registered transceiver with three-state D-type registers, designed for bidirectional data multiplexing between two 16-bit buses (A and B). It supports industrial temperature range (−40°C to +85°C), operates at VCC = 5V ±10%, delivers 64 mA sink / 32 mA source drive, and features Ioff partial-power-down protection. It is used in high-capacitance load interfaces such as backplane drivers and bus isolation circuits.
For engineers reviewing the CY74FCT16646TPVCT datasheet, CY74FCT16646TPVCT pinout, CY74FCT16646TPVCT application, or CY74FCT16646TPVCT equivalent, key selection criteria include propagation delay (9.0 ns max bus-to-bus), output skew (<250 ps typical), ground bounce performance (VOLP <1.0 V), and SSOP-56 package compatibility with industrial backplane timing requirements.
Technical Context
The CY74FCT16646TPVCT implements dual 16-bit register banks (A and B) with independent clock inputs (CLKAB/CLKBA), direction control (DIR), and active-low output enable (OE). Its transceiver mode allows real-time or registered data transfer between buses, while isolation mode enables storage of A/B data without bus contention.
It uses FCT logic family characteristics: TTL-compatible input thresholds (VIH = 2.0 V, VIL = 0.8 V), edge-rate controlled outputs for noise reduction, and Ioff circuitry that disables outputs during power-down to prevent backflow current. The device is not balanced-driver like the CY74FCT162646T variant and lacks current-limiting resistors on outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 5 V ±10% - compatible with standard 5-V TTL/CMOS systems; no level-shifting required |
| Propagation Delay | 9.0 ns max (bus-to-bus) - ensures timing closure in 100-MHz-class synchronous bus architectures |
| Sink/Source Drive | 64 mA sink / 32 mA source - sufficient to drive heavy capacitive loads (e.g., >100 pF backplanes) |
| Output Skew | <250 ps typical - minimizes intra-bus timing misalignment critical for parallel data integrity |
| Operating Temp | −40°C to +85°C - qualified for industrial-grade embedded control and communications equipment |
| Ioff Support | Yes - enables safe partial-power-down operation without damaging current flow when VCC = 0 V |
| ESD Rating | >2000 V HBM - provides robust handling margin during board assembly and field service |
Pinout & Package
Package: 56-pin SSOP (Shrunk Small Outline Package), 300-mil body width, 25-mil pitch, RoHS-compliant CU NIPDAU finish, MSL Level-1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A8, 2A1–2A8 | A-side data inputs / outputs | Register A port pins; bidirectional under DIR/OE control; TTL-compatible I/O |
| 1B1–1B8, 2B1–2B8 | B-side data inputs / outputs | Register B port pins; bidirectional under DIR/OE control; electrically identical to A-side |
| 1CLKAB, 2CLKAB | Register A clock (A→B) | LOW-to-HIGH transition clocks data from A bus into B register |
| 1CLKBA, 2CLKBA | Register B clock (B→A) | LOW-to-HIGH transition clocks data from B bus into A register |
| 1DIR, 2DIR | Direction control | Active HIGH selects B→A data flow; LOW selects A→B flow when OE is active |
| 1OE, 2OE | Output enable (active LOW) | Disables all A/B outputs to high-impedance state; enables tristate isolation |
| 1SAB, 2SAB | Source select A→B | Selects real-time or stored A data for output onto B bus |
| 1SBA, 2SBA | Source select B→A | Selects real-time or stored B data for output onto A bus |
| VCC, GND (× multiple) | Power and ground | Dual VCC/GND pairs per half-device reduce switching noise and improve PSRR |
Key Features
| Feature | Design Value |
|---|---|
| Ioff partial-power-down | Prevents reverse current flow when powered down - essential for hot-swap and mixed-voltage system designs |
| Edge-rate controlled outputs | Reduces simultaneous switching noise (SSN) and EMI - improves signal integrity on dense PCBs |
| Low ground bounce (VOLP <1.0 V) | Maintains logic LOW margin under heavy capacitive loading - prevents false triggering in downstream receivers |
| Three-state register architecture | Enables time-multiplexed bus sharing without external latches - reduces component count in data-path designs |
| Industrial temperature rating | Validated operation from −40°C to +85°C - suitable for factory automation, telecom line cards, and motor drives |
Applications
| Backplane Interface | Bus Isolation Module |
|---|---|
Use Scenario: Interfacing CPU local bus to extended backplane with long trace lengths and high capacitance. IC Role / Device Role / Timing Role: Registered transceiver providing buffered, clock-aligned data transfer between A (CPU side) and B (backplane side) buses. Use Value: 64 mA sink drive and low VOLP ensure reliable LOW-level signaling across >100 pF loads; 9 ns propagation supports 100 MHz burst transfers. | Use Scenario: Isolating two subsystems (e.g., sensor cluster and main controller) to prevent fault propagation and ground loops. IC Role / Device Role / Timing Role: Bidirectional bus isolator with independent clocking and direction control for deterministic data handshaking. Use Value: Ioff support enables safe power sequencing; three-state outputs eliminate bus contention during power-up/down transitions. |
| Industrial PLC I/O Expansion | Legacy Bus Bridge (e.g., ISA to LPC) |
Use Scenario: Adding modular digital I/O to programmable logic controllers where timing predictability and noise immunity are critical. IC Role / Device Role / Timing Role: Registered data multiplexer synchronizing asynchronous peripheral reads/writes to the PLC's synchronous control bus. Use Value: Dual-clock inputs (CLKAB/CLKBA) allow independent capture of input and output data; DIR/OE enable cycle-accurate bus arbitration. | Use Scenario: Bridging legacy 16-bit ISA bus signals to modern low-pin-count (LPC) interfaces in embedded instrumentation. IC Role / Device Role / Timing Role: Protocol-transparent 16-bit data shuttle with register staging to absorb timing mismatches between disparate bus domains. Use Value: Real-time and stored data modes (via SAB/SBA) permit flexible handshake protocols; SSOP-56 footprint fits space-constrained legacy upgrade modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY74FCT16646ATPVCT | 6.3 ns max propagation delay (vs. 9.0 ns); otherwise identical electrical specs and pinout | Better suited for higher-speed bus timing budgets (e.g., 125 MHz burst cycles) | Select when tighter propagation delay is required; same SSOP-56 package and layout compatibility |
| CY74FCT162646TPVCT | 24 mA balanced drivers with current-limiting resistors; lower VOLP (<0.6 V); different drive strength profile | Optimized for transmission-line driving (e.g., point-to-point stubs), not high-capacitance backplanes | Choose for reduced ground bounce and termination-free line driving; not drop-in due to drive asymmetry and different AC specs |
Compared with CY74FCT16646ATPVCT and CY74FCT162646TPVCT, the CY74FCT16646TPVCT offers the highest sink current (64 mA) and is uniquely suited for heavy capacitive loads, while trading speed for drive strength - making it optimal for industrial backplane and legacy bus interface applications where robustness outweighs marginal timing gains.
Availability
CY74FCT16646TPVCT is available at Aetrix Electronics and suitable for industrial backplane interfaces, PLC I/O expansion modules, and legacy bus bridge designs requiring stable component supply, long-lifecycle support, and RoHS-compliant SSOP packaging.
Supply support for CY74FCT16646TPVCT 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 over 50 years of industrial-grade product development.
The CY74FCT16646TPVCT belongs to TI's FCT logic family, engineered for high-noise-immunity, 5-V TTL-compatible bus interfacing in demanding industrial and communications infrastructure applications.
FAQ
What is the maximum propagation delay specification for CY74FCT16646TPVCT?
The CY74FCT16646TPVCT has a maximum bus-to-bus propagation delay of 9.0 ns over the full industrial temperature range (−40°C to +85°C) and VCC = 5 V ±10%. This value applies to both real-time and registered transfer paths and is measured under standard load conditions per the official TI datasheet SCCS060B.
Does CY74FCT16646TPVCT support partial-power-down operation?
Yes, CY74FCT16646TPVCT includes Ioff circuitry that disables all outputs when VCC = 0 V, preventing damaging current backflow during partial-power-down scenarios. This feature is fully specified and tested per JEDEC standards, making CY74FCT16646TPVCT suitable for hot-swap and mixed-supply system designs.
What package type and dimensions does CY74FCT16646TPVCT use?
CY74FCT16646TPVCT uses a 56-pin SSOP (Shrunk Small Outline Package) with 300-mil body width and 25-mil lead pitch. Its mechanical outline conforms to JEDEC MO-118, with overall dimensions of 18.54 mm × 7.50 mm × 2.40 mm (L × W × H), and it features CU NIPDAU lead finish and MSL Level-1 moisture sensitivity rating.
Can CY74FCT16646TPVCT drive high-capacitance backplane loads?
Yes, CY74FCT16646TPVCT is explicitly designed for high-capacitance load driving, delivering 64 mA sink current and maintaining VOLP <1.0 V at VCC = 5 V and TA = 25°C. Its edge-rate controlled outputs and robust drive capability make CY74FCT16646TPVCT ideal for backplane interfaces exceeding 100 pF total capacitance.
How does CY74FCT16646TPVCT differ from CY74FCT162646TPVCT?
CY74FCT16646TPVCT uses asymmetric 64 mA sink / 32 mA source drivers optimized for heavy capacitive loads, whereas CY74FCT162646TPVCT employs balanced 24 mA drivers with integrated current-limiting resistors for transmission-line driving. They share pinout and logic function but differ in drive strength, VOLP (<1.0 V vs. <0.6 V), and target applications - backplane vs. point-to-point stubs.
CY74FCT16646TPVCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 56-BSSOP (0.295", 7.50mm 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-SSOP
CY74FCT16646TPVCT FAQ
1.How can I place an order for CY74FCT16646TPVCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT16646TPVCT 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 CY74FCT16646TPVCT reliable?
The price and inventory of CY74FCT16646TPVCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT16646TPVCT is usually 5 days.
3.What payment methods are accepted for CY74FCT16646TPVCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT16646TPVCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT16646TPVCT?
CY74FCT16646TPVCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT16646TPVCT 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 CY74FCT16646TPVCT?
For technical support, including CY74FCT16646TPVCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT16646TPVCT requirements.
6.How does Aetrix verify that CY74FCT16646TPVCT is sourced from the original manufacturer or authorized distributors?
All CY74FCT16646TPVCT 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 CY74FCT16646TPVCT meets industry standards.
7.What is the process for return or replacement of CY74FCT16646TPVCT?
All CY74FCT16646TPVCT units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT16646TPVCT, 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 CY74FCT16646TPVCT part is unused and in its original packaging.
Return procedure for CY74FCT16646TPVCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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