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Texas Instruments 74FCT162646ATPVCG4
- Part No.:
- 74FCT162646ATPVCG4
- Manufacturer:
- Texas Instruments
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74FCT162646ATPVCG4.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,617
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Product details
Overview
74FCT162646ATPVCG4 from Texas Instruments is a 16-bit registered transceiver with balanced 24 mA output drivers, 6.3 ns max bus-to-bus propagation delay, and Ioff partial-power-down support. It operates at 5V ±10% across −40°C to +85°C and is used in high-speed backplane and transmission-line interfacing where low ground bounce (<0.6 V) and noise control are critical.
For engineers reviewing the 74FCT162646ATPVCG4 datasheet, 74FCT162646ATPVCG4 pinout, 74FCT162646ATPVCG4 application, or 74FCT162646ATPVCG4 equivalent, this device is selected for bidirectional data multiplexing in industrial bus systems requiring three-state control, clocked register storage, and robust ESD protection (>2000 V).
Technical Context
The 74FCT162646ATPVCG4 integrates dual 16-bit D-type registers with independent CLKAB/CLKBA clocks, DIR-controlled data direction, and OE-gated three-state outputs. Its balanced 24 mA drivers include integrated current-limiting resistors to suppress undershoot and reduce reliance on external termination.
It implements Ioff circuitry to disable outputs during power-down, preventing reverse current flow. The device supports transparent (real-time) and registered (clocked) data transfer modes via SAB/SBA select inputs, enabling flexible multiplexed bus arbitration between A and B ports.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC | 5 V ±10% - compatible with standard TTL/CMOS logic rails and eliminates need for level-shifting in 5V systems. |
| Propagation Delay (Bus-to-Bus) | 6.3 ns max - enables reliable timing in 100+ MHz bus cycles with sufficient setup/hold margin. |
| Output Drive | ±24 mA balanced - reduces ground bounce (VOLP < 0.6 V) and allows direct driving of 50-Ω transmission lines without external resistors. |
| Operating Temperature | −40°C to +85°C - qualified for industrial environments including factory automation and motor control cabinets. |
| Ioff Support | Enabled - prevents backflow current when VCC = 0 V, essential for hot-swap and partial-power-down system architectures. |
| ESD Rating | >2000 V HBM - provides robust handling tolerance during PCB assembly and field service without additional protection circuitry. |
| Package | 56-pin SSOP (DL), 300-mil width - surface-mount compatible with standard reflow profiles and IPC-7351 land patterns. |
Pinout & Package
56-pin Shrink Small Outline Package (SSOP), DL package drawing, 300-mil body width, 0.025-inch pitch, JEDEC MO-118 compliant. RoHS-compliant green finish with Cu/Ni/PdAu lead finish and MSL Level-1 rating (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A8, 2A1–2A8 | A-side data inputs / B-side data outputs | Register A input pins; also serve as three-state outputs to B bus when DIR = LOW and OE = LOW. |
| 1B1–1B8, 2B1–2B8 | B-side data inputs / A-side data outputs | Register B input pins; also serve as three-state outputs to A bus when DIR = HIGH and OE = LOW. |
| 1CLKAB, 2CLKAB | Register A clock (active-HIGH) | Loads data from A bus into Register A on rising edge; controls transparent vs. stored data routing. |
| 1CLKBA, 2CLKBA | Register B clock (active-HIGH) | Loads data from B bus into Register B on rising edge; enables independent capture of B-side signals. |
| 1DIR, 2DIR | Data direction control (active-HIGH = B→A) | Determines destination bus during transceiver mode; HIGH routes B data to A bus, LOW routes A data to B bus. |
| 1OE, 2OE | Output enable (active-LOW) | Disables all outputs (high-impedance) when HIGH; enables bidirectional transfer when LOW. |
| 1SAB, 2SAB | Source select A→B (active-HIGH) | Selects real-time A data (SAB = LOW) or stored A data (SAB = HIGH) for output to B bus. |
| 1SBA, 2SBA | Source select B→A (active-HIGH) | Selects real-time B data (SBA = LOW) or stored B data (SBA = HIGH) for output to A bus. |
| VCC, GND | Power supply and ground | Eight dedicated VCC and eight GND pins distributed across package - minimizes simultaneous switching noise and improves signal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Edge-rate controlled outputs | Reduces system-level radiated emissions and crosstalk by limiting slew rate without external RC networks. |
| 24 mA balanced drivers | Enables impedance-matched driving of PCB traces and cables, minimizing reflections and signal distortion. |
| Ioff partial-power-down | Allows safe insertion/removal in live backplanes by disabling outputs when VCC is unpowered. |
| Typical output skew < 250 ps | Ensures deterministic timing across all 16 bits - critical for parallel bus synchronization and setup/hold compliance. |
| Industrial temperature range | Validated operation from −40°C to +85°C - suitable for deployment in uncontrolled ambient environments. |
Applications
| Industrial Backplane Interface | Programmable Logic Interconnect |
|---|---|
|
Use Scenario: Bidirectional data exchange between FPGA and microcontroller over a shared 16-bit parallel bus in an industrial PLC rack. IC Role / Device Role / Timing Role: Registered transceiver providing clock-synchronized data latching, direction control, and three-state isolation between domains. Use Value: Eliminates external bus buffers and timing glue logic while maintaining <6.3 ns propagation delay and <0.6 V ground bounce under full load. |
Use Scenario: Multiplexing configuration data between multiple CPLD banks and a central configuration controller. IC Role / Device Role / Timing Role: Dual-register transceiver enabling concurrent storage and real-time forwarding of bitstream segments. Use Value: Supports both transparent and registered transfer modes via SAB/SBA selects - simplifies state-machine design and reduces FPGA resource usage. |
| High-Speed Test Equipment Bus | Legacy System Upgrade Interface |
|
Use Scenario: Interfacing a 5V TTL-based digital pattern generator with a modern 3.3V FPGA test interface board. IC Role / Device Role / Timing Role: Level-tolerant transceiver with 5V VCC and CMOS-compatible inputs, isolating voltage domains while preserving timing integrity. Use Value: Delivers 24 mA drive strength into 50-Ω loads without external termination - reduces board space and improves signal fidelity at 100+ MHz. |
Use Scenario: Replacing obsolete 74ACT or 74AS transceivers in legacy instrumentation with extended lifecycle support. IC Role / Device Role / Timing Role: Pin-compatible upgrade offering improved noise immunity, lower ground bounce, and Ioff safety. Use Value: Maintains identical SSOP-56 footprint and logic behavior while adding ESD >2000 V and industrial temp qualification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY74FCT16646ATPVC | Higher drive (64 mA sink / 32 mA source), no current-limiting resistors - requires external termination for transmission lines. | Better suited for driving heavy capacitive loads (e.g., long backplanes), but exhibits higher ground bounce (VOLP <1.0 V). | Choose CY74FCT16646ATPVC when maximum fanout or capacitive drive is required and noise margins allow higher VOLP. |
| 74FCT162646CTPVCG4 | 5.4 ns max propagation delay (vs. 6.3 ns), otherwise identical electrical and pinout specification. | Used where tighter timing budgets demand faster registered transfer - e.g., sub-10 ns clock domains or high-frequency test equipment. | Choose 74FCT162646CTPVCG4 only if the 1.1 ns speed improvement is required and layout supports matching trace lengths. |
Compared with CY74FCT16646ATPVC, the 74FCT162646ATPVCG4 trades raw drive strength for lower noise and built-in line matching; compared with 74FCT162646CTPVCG4, it offers relaxed timing at identical cost and footprint - making it optimal for industrial bus interfaces where robustness outweighs marginal speed gain.
Availability
74FCT162646ATPVCG4 is available at Aetrix Electronics and suitable for industrial backplane interfaces, programmable logic interconnects, and legacy system upgrades requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant green packaging.
Supply support for 74FCT162646ATPVCG4 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 industrial-grade reliability validation.
The FCT logic family, including the 74FCT162646ATPVCG4, was engineered for high-speed, low-noise 5V system interfacing - targeting industrial control, test equipment, and telecom infrastructure where signal integrity and power-down safety are mandatory.
FAQ
What is the maximum clock frequency supported by the 74FCT162646ATPVCG4?
The 74FCT162646ATPVCG4 does not specify a maximum clock frequency in its datasheet; instead, it guarantees timing parameters such as 6.3 ns max propagation delay and 5.0 ns minimum clock pulse width. For reliable operation, designers should ensure setup/hold times (tSU = 2.0 ns, tH = 1.5 ns) are met - supporting effective clock rates up to ~100 MHz in typical PCB layouts with controlled impedance.
Does the 74FCT162646ATPVCG4 support mixed-voltage operation (e.g., 3.3V inputs with 5V VCC)?
Yes, the 74FCT162646ATPVCG4 accepts TTL- and CMOS-compatible input levels: VIL ≤ 0.8 V and VIH ≥ 2.0 V. With VCC = 5 V, it reliably interprets 3.3 V logic HIGH signals and is commonly used to interface 3.3 V FPGAs or microcontrollers to 5 V buses without level shifters.
How does the Ioff feature function in the 74FCT162646ATPVCG4 during power-down?
When VCC = 0 V, the Ioff circuitry in the 74FCT162646ATPVCG4 actively disables all output drivers, presenting high-impedance states regardless of OE or DIR logic levels. This prevents damaging reverse current flow from live bus lines into the unpowered device - a key requirement for hot-pluggable backplane modules.
Can the 74FCT162646ATPVCG4 be used in place of the CY74FCT16646ATPVC?
No - while both are 56-pin SSOP 16-bit registered transceivers from TI's FCT family, the 74FCT162646ATPVCG4 has balanced ±24 mA drivers optimized for transmission lines, whereas the CY74FCT16646ATPVC delivers ±32 mA/−64 mA for heavy capacitive loads. They share pinout but differ electrically; substitution requires validation of drive strength, ground bounce, and termination requirements.
What is the meaning of "G4" in the part number 74FCT162646ATPVCG4?
The "G4" suffix in 74FCT162646ATPVCG4 indicates a green, RoHS-compliant packaging variant with Cu/Ni/PdAu lead finish and no bromine or antimony-based flame retardants. It reflects TI's eco-plan designation per the 2009 Package Option Addendum and confirms MSL Level-1 (260°C peak reflow) suitability for standard SMT assembly.
74FCT162646ATPVCG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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
74FCT162646ATPVCG4 FAQ
1.How can I place an order for 74FCT162646ATPVCG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74FCT162646ATPVCG4 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 74FCT162646ATPVCG4 reliable?
The price and inventory of 74FCT162646ATPVCG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT162646ATPVCG4 is usually 5 days.
3.What payment methods are accepted for 74FCT162646ATPVCG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74FCT162646ATPVCG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74FCT162646ATPVCG4?
74FCT162646ATPVCG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74FCT162646ATPVCG4 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 74FCT162646ATPVCG4?
For technical support, including 74FCT162646ATPVCG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT162646ATPVCG4 requirements.
6.How does Aetrix verify that 74FCT162646ATPVCG4 is sourced from the original manufacturer or authorized distributors?
All 74FCT162646ATPVCG4 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 74FCT162646ATPVCG4 meets industry standards.
7.What is the process for return or replacement of 74FCT162646ATPVCG4?
All 74FCT162646ATPVCG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT162646ATPVCG4, 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 74FCT162646ATPVCG4 part is unused and in its original packaging.
Return procedure for 74FCT162646ATPVCG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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