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Texas Instruments CY74FCT162646CTPVC
- Part No.:
- CY74FCT162646CTPVC
- Manufacturer:
- Texas Instruments
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT162646CTPVC.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,408
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Product details
Overview
CY74FCT162646CTPVC from Texas Instruments is a 16-bit registered transceiver with balanced 24 mA output drivers, three-state D-type registers, and Ioff partial-power-down support. It operates at 5 V ±10%, delivers typical output skew < 0.5 ns, supports −40°C to +85°C industrial temperature range, and is used in high-speed bidirectional data bus interfacing between microprocessors and memory or peripheral subsystems.
For engineers reviewing the CY74FCT162646CTPVC datasheet, CY74FCT162646CTPVC pinout, CY74FCT162646CTPVC application, or CY74FCT162646CTPVC equivalent, key selection criteria include its 5.4 ns bus-to-bus propagation delay, 24 mA balanced drive capability, low ground bounce (<0.6 V), and SSOP-56 package compatibility with legacy 300-mil footprint designs.
Technical Context
This device integrates dual 16-bit register banks (A and B), independent clock inputs (CLKAB/CLKBA), direction control (DIR), output enable (OE), and source-select logic (SAB/SBA) to support real-time or registered data transfer in either direction. Its architecture enables simultaneous storage and multiplexed output of data from either bus, with isolation mode allowing cross-register storage without bus contention.
The CY74FCT162646CTPVC implements current-limiting resistors in 24 mA balanced output drivers to minimize undershoot and ground bounce, eliminating need for external termination on transmission lines. Its Ioff circuitry ensures outputs are disabled during power-down, preventing backflow current when VCC = 0 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC | 5 V ±10% - compatible with standard TTL/CMOS 5 V systems; no level-shifting required |
| Propagation Delay | 5.4 ns max (bus-to-bus) - enables reliable operation up to ~185 MHz system clock edge rates |
| Output Drive | ±24 mA balanced - reduces signal integrity issues on stubbed or unterminated PCB traces |
| Ground Bounce | <0.6 V typical at VCC = 5 V - minimizes noise coupling into adjacent signals and power rails |
| Operating Temp | −40°C to +85°C - qualified for industrial-grade embedded control and communications equipment |
| Ioff | ±1 µA at VCC = 0 V - prevents damaging backflow current during hot-insertion or partial power-down |
| Input Capacitance | 6.0 pF max - low loading preserves timing margins in high-fanout bus applications |
Pinout & Package
Package: 56-pin SSOP (O56), 300-mil body width, 0.025-inch pitch, JEDEC MO-118 compliant, RoHS-compliant green finish (CU NIPDAU), MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A8, 2A1–2A8 | Register A input / Register B output | Eight-bit A-side data ports; configured as inputs when DIR = LOW, outputs when DIR = HIGH |
| 1B1–1B8, 2B1–2B8 | Register B input / Register A output | Eight-bit B-side data ports; configured as inputs when DIR = HIGH, outputs when DIR = LOW |
| 1CLKAB, 2CLKAB | A→B register clock | LH transition latches A-bus data into B register; controls timing of stored-data transfer to B bus |
| 1CLKBA, 2CLKBA | B→A register clock | LH transition latches B-bus data into A register; controls timing of stored-data transfer to A bus |
| 1DIR, 2DIR | Direction control | Active-HIGH selects B→A data flow; Active-LOW selects A→B data flow; determines active output bus |
| 1OE, 2OE | Output enable (active LOW) | Drives all outputs to high-impedance when HIGH; enables/disables transceiver function per channel pair |
| 1SAB, 2SAB | Source select A→B | Selects real-time A-bus (SAB = LOW) or registered A-data (SAB = HIGH) for output to B bus |
| 1SBA, 2SBA | Source select B→A | Selects real-time B-bus (SBA = LOW) or registered B-data (SBA = HIGH) for output to A bus |
Key Features
| Feature | Design Value |
|---|---|
| Balanced 24 mA output drivers | Reduces ground bounce to <0.6 V and eliminates need for external series termination on PCB traces |
| Ioff partial-power-down protection | Disables outputs at VCC = 0 V, limiting backflow current to ±1 µA for safe hot-swap and mixed-voltage system use |
| 5.4 ns max bus-to-bus propagation | Supports high-speed synchronous bus handshaking in microprocessor-to-peripheral interfaces up to 185 MHz edge rate |
| Three-state register architecture | Enables isolated storage of A- and B-bus data simultaneously, enabling glitch-free bus arbitration and data staging |
| Edge-rate controlled outputs | Minimizes EMI and crosstalk in dense routing environments without sacrificing switching speed |
Applications
| Microprocessor Bus Interface | Memory Subsystem Interfacing |
|---|---|
Use Scenario: Bidirectional data transfer between an 80C188 microprocessor and external SRAM or flash memory using shared address/data bus. IC Role / Device Role / Timing Role: Registered transceiver synchronizing data flow between CPU and memory with precise clock-controlled latch timing. Use Value: Enables clean separation of read/write cycles via DIR/OE control while maintaining 5.4 ns timing margin for 16-bit burst transfers. | Use Scenario: Isolating and buffering address/data lines between FPGA-based controller and DDR SDRAM interface. IC Role / Device Role / Timing Role: Bus register providing hold-time compliance and noise-immune data staging before memory access. Use Value: Reduces ground bounce-induced setup violations with <0.6 V VOLP, improving signal integrity on multi-drop memory buses. |
| Industrial Backplane Communication | Legacy System Bus Extension |
Use Scenario: High-reliability data exchange across a 16-bit parallel backplane connecting PLC I/O modules and main controller. IC Role / Device Role / Timing Role: Robust transceiver driving long, unterminated traces with balanced 24 mA outputs and Ioff safety. Use Value: Eliminates external termination resistors and maintains signal fidelity over 15 cm trace lengths at 20 MHz sustained data rates. | Use Scenario: Extending ISA or VMEbus-compatible data paths in retrofitted test equipment requiring 5 V TTL compatibility. IC Role / Device Role / Timing Role: Pin-compatible bus repeater preserving original timing budgets while adding register staging and isolation. Use Value: Maintains 300-mil SSOP footprint and 5.4 ns propagation spec, ensuring drop-in replacement without PCB redesign. |
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 |
|---|---|---|---|
| CY74FCT16646CTPVC | Higher drive (64 mA sink / 32 mA source); higher ground bounce (1.0 V typical); unbalanced outputs | Better suited for driving heavy capacitive loads (e.g., backplanes), less ideal for noise-sensitive transmission lines | Select when load capacitance > 100 pF or termination is externally managed |
| 74FCT162646ATPACT | TSSOP-56 (240-mil), 6.3 ns propagation, same 24 mA drive and ground bounce specs | Smaller footprint; requires PCB layout change; identical electrical behavior in functional operation | Select when board space is constrained and re-layout is acceptable |
Compared with CY74FCT16646CTPVC and 74FCT162646ATPACT, CY74FCT162646CTPVC offers optimal balance of low-noise 24 mA drive, 5.4 ns speed, and legacy SSOP-56 compatibility-making it preferred for industrial bus extension where footprint retention and EMI control are critical.
Availability
CY74FCT162646CTPVC is available at Aetrix Electronics and suitable for industrial backplane communication, microprocessor bus interfacing, and legacy system bus extension requiring stable component supply and long-term lifecycle continuity.
Supply support for CY74FCT162646CTPVC 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, precision, and industrial-grade performance.
CY74FCT162646CTPVC belongs to TI's FCT logic family, designed specifically for high-speed, low-noise bidirectional bus interfacing in industrial, computing, and communications systems operating at 5 V.
FAQ
What is the maximum clock frequency supported by CY74FCT162646CTPVC?
CY74FCT162646CTPVC does not specify a maximum clock frequency directly, but its 5.4 ns bus-to-bus propagation delay and 5.0 ns minimum clock pulse width imply reliable operation up to approximately 185 MHz for edge-triggered timing. Actual system frequency depends on setup/hold timing margins, PCB trace length, and load capacitance-designers should verify timing closure using the 2.0 ns setup and 1.5 ns hold times specified in the datasheet.
Does CY74FCT162646CTPVC support hot-swap or partial-power-down operation?
Yes, CY74FCT162646CTPVC supports partial-power-down via its Ioff circuitry. When VCC = 0 V, output leakage is limited to ±1 µA, preventing damaging current backflow through powered-down sections of the system. This makes CY74FCT162646CTPVC suitable for hot-plug applications and mixed-voltage domains where sequencing is not guaranteed.
What is the difference between CY74FCT162646CTPVC and CY74FCT16646CTPVC?
CY74FCT162646CTPVC features balanced 24 mA output drivers with <0.6 V ground bounce and is optimized for transmission-line driving. CY74FCT16646CTPVC provides higher 64 mA sink / 32 mA source drive but exhibits higher ground bounce (~1.0 V) and unbalanced output characteristics-making it better suited for heavy capacitive loads like backplanes rather than noise-sensitive interconnects.
Is CY74FCT162646CTPVC RoHS-compliant and what is its moisture sensitivity level?
Yes, CY74FCT162646CTPVC is RoHS-compliant with green (Pb-free, no Sb/Br) finish and CU NIPDAU lead finish. Its moisture sensitivity level is JEDEC Level-1 (260°C peak reflow, unlimited floor life), meaning it can be stored indefinitely at ambient conditions without baking prior to assembly.
Can CY74FCT162646CTPVC operate with 3.3 V logic levels?
No, CY74FCT162646CTPVC is a 5 V-only device specified for VCC = 5 V ±10%. Its input thresholds (VIH = 2.0 V, VIL = 0.8 V) and output voltage levels (VOH ≥ 2.4 V at −24 mA, VOL ≤ 0.55 V at 24 mA) are designed for TTL/CMOS 5 V compatibility. Interfacing with 3.3 V systems requires level translation or a different logic family such as LVT or ALVC.
CY74FCT162646CTPVC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-SSOP
CY74FCT162646CTPVC FAQ
1.How can I place an order for CY74FCT162646CTPVC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT162646CTPVC 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 CY74FCT162646CTPVC reliable?
The price and inventory of CY74FCT162646CTPVC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT162646CTPVC is usually 5 days.
3.What payment methods are accepted for CY74FCT162646CTPVC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT162646CTPVC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT162646CTPVC?
CY74FCT162646CTPVC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT162646CTPVC 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 CY74FCT162646CTPVC?
For technical support, including CY74FCT162646CTPVC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT162646CTPVC requirements.
6.How does Aetrix verify that CY74FCT162646CTPVC is sourced from the original manufacturer or authorized distributors?
All CY74FCT162646CTPVC 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 CY74FCT162646CTPVC meets industry standards.
7.What is the process for return or replacement of CY74FCT162646CTPVC?
All CY74FCT162646CTPVC units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT162646CTPVC, 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 CY74FCT162646CTPVC part is unused and in its original packaging.
Return procedure for CY74FCT162646CTPVC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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