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Texas Instruments CY74FCT162646ATPVC
- Part No.:
- CY74FCT162646ATPVC
- Manufacturer:
- Texas Instruments
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT162646ATPVC.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,496
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Product details
Overview
CY74FCT162646ATPVC from Texas Instruments is a 16-bit registered transceiver with balanced 24 mA output drivers, three-state D-type registers, and dual-bus bidirectional data routing controlled by DIR and OE pins. It operates at 5V ±10%, supports −40°C to +85°C industrial temperature range, and delivers typical VOL < 0.55 V at 24 mA sink/source - ideal for high-speed backplane and transmission-line interfacing in telecom and industrial control systems.
For engineers reviewing the CY74FCT162646ATPVC datasheet, CY74FCT162646ATPVC pinout, CY74FCT162646ATPVC application, or CY74FCT162646ATPVC equivalent, key selection criteria include its 6.3 ns max bus-to-bus propagation delay, Ioff partial-power-down support, edge-rate-controlled outputs for noise reduction, and SSOP-56 package compatibility with legacy FCT logic families.
Technical Context
This device integrates two independent 16-bit register banks (A and B), clocked on rising edges of CLKAB/CLKBA, with multiplexed output sourcing via SAB/SBA select inputs. Its direction control (DIR) and active-low output enable (OE) jointly determine real-time or registered data flow between buses.
The CY74FCT162646ATPVC implements current-limiting resistors in 24 mA balanced drivers to suppress ground bounce (<0.6 V typical) and minimize undershoot - eliminating need for external termination in point-to-point or stubbed transmission-line topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 5 V ±10% - compatible with standard TTL/CMOS logic rails and industrial power domains |
| Propagation Delay | 6.3 ns max (bus-to-bus) - enables ≤159 MHz data throughput in transparent mode |
| Output Drive | ±24 mA balanced - reduces simultaneous switching noise and eliminates external series termination |
| Ground Bounce | <0.6 V typical at VCC = 5 V, TA = 25°C - ensures signal integrity during high-speed switching |
| Operating Temp | −40°C to +85°C - qualified for industrial control, base station, and automotive under-hood auxiliary modules |
| Ioff Support | Active at VCC = 0 V - prevents backflow current during partial power-down in mixed-voltage systems |
| ESD Rating | >2000 V HBM - provides robust handling margin in automated assembly and field service environments |
Pinout & Package
Package: 56-pin SSOP (DL), 300-mil body width, 25-mil pitch, JEDEC MO-118 compliant, RoHS green (no Sb/Br), CU NIPDAU lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A8, 2A1–2A8 | A-bus register inputs / B-bus outputs | Eight-bit A-side data paths; configured as inputs when DIR = LOW and OE = LOW, outputs when DIR = HIGH and OE = LOW |
| 1B1–1B8, 2B1–2B8 | B-bus register inputs / A-bus outputs | Eight-bit B-side data paths; functionally symmetric to A-bus with independent clocking and direction control |
| 1CLKAB, 2CLKAB | A-to-B register clock input | Rising-edge-triggered latch for transferring A-bus data into B-register; enables synchronous capture from A to B domain |
| 1CLKBA, 2CLKBA | B-to-A register clock input | Rising-edge-triggered latch for transferring B-bus data into A-register; enables synchronous capture from B to A domain |
| 1DIR, 2DIR | Direction control input | When LOW: A-bus drives B-bus; when HIGH: B-bus drives A-bus - determines primary data flow direction per channel pair |
| 1OE, 2OE | Output enable (active LOW) | Disables all outputs to high-impedance state when HIGH; enables bidirectional transfer when LOW and DIR set |
| 1SAB, 2SAB | A-to-B output source select | Selects between real-time A-bus data (SAB = LOW) or registered A-data (SAB = HIGH) for output onto B-bus |
| 1SBA, 2SBA | B-to-A output source select | Selects between real-time B-bus data (SBA = LOW) or registered B-data (SBA = HIGH) for output onto A-bus |
| VCC, GND (×4 each) | Power and ground terminals | Distributed supply/return pins reduce IR drop and improve noise immunity across high-speed 16-bit operation |
Key Features
| Feature | Design Value |
|---|---|
| Edge-rate controlled outputs | Reduces system-level EMI and crosstalk by limiting slew rate without external RC networks |
| 24 mA balanced drivers | Enables impedance-matched driving of 50 Ω transmission lines without external termination resistors |
| Ioff partial-power-down | Prevents damaging back-current when VCC = 0 V, supporting hot-swap and multi-rail power sequencing |
| Typical output skew < 250 ps | Ensures deterministic timing alignment across all 16 bits for synchronous parallel bus applications |
| Industrial temperature range | Validated operation from −40°C to +85°C supports deployment in uncontrolled environmental enclosures |
Applications
| Telecom Backplane Interface | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Bidirectional data exchange between FPGA-based line cards and centralized switch fabric over 16-bit parallel backplane traces. IC Role / Device Role / Timing Role: Registered transceiver providing synchronized, noise-immune bus isolation and direction-controlled data routing between clock domains. Use Value: 6.3 ns propagation delay and <0.6 V ground bounce ensure setup/hold compliance and signal integrity across 20+ inch FR4 traces at 100+ Mbps. |
Use Scenario: Interfacing microcontroller GPIO banks to isolated digital I/O expansion cards in programmable logic controllers. IC Role / Device Role / Timing Role: Three-state registered buffer enabling hot-swappable module detection, direction-controlled data mirroring, and register-retained state during communication pauses. Use Value: Ioff support allows safe insertion/removal while main controller remains powered; 24 mA drive sustains noise margin across long ribbon-cable runs. |
| Automotive ADAS Sensor Hub | Test Equipment Data Acquisition |
|
Use Scenario: Aggregating time-stamped sensor data (camera, radar, IMU) into a central processing unit within automotive domain controllers. IC Role / Device Role / Timing Role: Synchronized register bank capturing concurrent sensor streams and forwarding aligned batches via DIR/OE-controlled burst transfers. Use Value: −40°C to +85°C rating and >2000 V HBM ESD withstand capability meet AEC-Q100 stress requirements for under-hood electronics. |
Use Scenario: High-fidelity digital pattern generation and acquisition between test head and DUT using parallel bus protocols (e.g., IEEE 1149.1 JTAG extensions). IC Role / Device Role / Timing Role: Low-skew registered transceiver ensuring deterministic sampling window alignment and minimizing metastability risk at 100+ MHz test clocks. Use Value: Typical output skew <250 ps and 1.5 ns min hold time guarantee bit-aligned capture across full 16-bit bus width. |
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 |
|---|---|---|---|
| CY74FCT16646ATPVC | Higher drive strength (64 mA sink / 32 mA source), higher ground bounce (~1.0 V), no output current limiting | Better suited for high-capacitance backplanes (>100 pF/load); less optimal for controlled-impedance transmission lines | Select when driving heavy capacitive loads or legacy bus structures requiring stronger drive; avoid for low-noise line driving. |
| 74FCT162646ATPACT | TSSOP-56 (240-mil width, 1.2 mm height) vs. SSOP-56 (300-mil width); identical electrical specs and pinout | Enables higher PCB density and improved thermal performance in space-constrained test equipment or portable instrumentation | Select for new designs prioritizing board area reduction and reflow-compatible packaging; requires layout revision due to footprint change. |
Compared with CY74FCT16646ATPVC, the CY74FCT162646ATPVC offers lower ground bounce and built-in termination for cleaner transmission-line signaling, while the 74FCT162646ATPACT provides identical functionality in a smaller TSSOP package - making it preferable for compact, thermally sensitive applications where SSOP footprint is prohibitive.
Availability
CY74FCT162646ATPVC is available at Aetrix Electronics and suitable for telecom backplane interface, industrial PLC I/O modules, automotive ADAS sensor hubs, and test equipment data acquisition requiring stable component supply and long-term industrial lifecycle support.
Supply support for CY74FCT162646ATPVC 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 expertise in high-reliability industrial and automotive-grade components.
The CY74FCT162646ATPVC belongs to TI's FCT logic family, designed specifically for noise-sensitive, high-speed parallel bus applications requiring precise timing control, low ground bounce, and robust operation across extended temperature ranges.
FAQ
What is the maximum clock frequency supported by CY74FCT162646ATPVC?
CY74FCT162646ATPVC does not specify a maximum clock frequency in its datasheet; instead, it guarantees 6.3 ns max propagation delay (bus-to-bus) and 5.0 ns minimum clock pulse width. Based on these, reliable operation up to approximately 159 MHz is achievable in transparent mode, assuming proper PCB layout and load conditions. The actual usable frequency depends on system-level timing margins including setup/hold and board trace delays.
Does CY74FCT162646ATPVC support hot-swap operation?
Yes, CY74FCT162646ATPVC supports hot-swap operation through its Ioff circuitry, which disables outputs and blocks current backflow when VCC = 0 V. This feature allows safe insertion or removal from a live backplane or powered system, provided that all signal pins remain within −0.5 V to +7.0 V absolute maximum ratings during the event. No external protection circuitry is required.
Can CY74FCT162646ATPVC replace CY74FCT16646ATPVC directly on the same PCB?
No, CY74FCT162646ATPVC is not a direct replacement for CY74FCT16646ATPVC on the same PCB. Although both share identical pinout, package (SSOP-56), and logic functionality, their output driver architectures differ fundamentally: CY74FCT162646ATPVC uses current-limited 24 mA balanced drivers optimized for transmission lines, whereas CY74FCT16646ATPVC uses higher-drive 64/32 mA asymmetrical drivers for heavy capacitive loads. Swapping them may cause signal integrity issues or excessive ground bounce.
What is the purpose of SAB and SBA pins on CY74FCT162646ATPVC?
The SAB (Source A-to-B) and SBA (Source B-to-A) pins on CY74FCT162646ATPVC control whether the output bus presents real-time (transparent) data or registered (latched) data. When SAB = LOW, the B-bus outputs reflect instantaneous A-bus inputs; when SAB = HIGH, the B-bus outputs reflect the last-latched A-register contents. SBA operates identically for B-to-A transfer, enabling flexible mix of buffered and registered data routing per channel pair.
Is CY74FCT162646ATPVC RoHS compliant and lead-free?
Yes, CY74FCT162646ATPVC is RoHS compliant and lead-free. Per TI's packaging documentation, it carries a "Green (RoHS & no Sb/Br)" eco-plan designation, features CU NIPDAU lead finish, and meets JEDEC MSL Level-1 (260°C peak reflow). The part marking "FCT162646A" appears on the package surface, and full compliance documentation is available in TI's official packaging addendum dated November 2009.
CY74FCT162646ATPVC 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
CY74FCT162646ATPVC FAQ
1.How can I place an order for CY74FCT162646ATPVC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT162646ATPVC 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 CY74FCT162646ATPVC reliable?
The price and inventory of CY74FCT162646ATPVC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT162646ATPVC is usually 5 days.
3.What payment methods are accepted for CY74FCT162646ATPVC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT162646ATPVC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT162646ATPVC?
CY74FCT162646ATPVC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT162646ATPVC 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 CY74FCT162646ATPVC?
For technical support, including CY74FCT162646ATPVC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT162646ATPVC requirements.
6.How does Aetrix verify that CY74FCT162646ATPVC is sourced from the original manufacturer or authorized distributors?
All CY74FCT162646ATPVC 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 CY74FCT162646ATPVC meets industry standards.
7.What is the process for return or replacement of CY74FCT162646ATPVC?
All CY74FCT162646ATPVC units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT162646ATPVC, 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 CY74FCT162646ATPVC part is unused and in its original packaging.
Return procedure for CY74FCT162646ATPVC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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