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Texas Instruments 74FCT162646CTPVCT
- Part No.:
- 74FCT162646CTPVCT
- Manufacturer:
- Texas Instruments
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74FCT162646CTPVCT.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,909
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Product details
Overview
74FCT162646CTPVCT from Texas Instruments is a 16-bit registered transceiver with three-state outputs, dual-bus bidirectional data flow, and balanced 24 mA output drivers. It operates at 5V ±10%, supports −40°C to +85°C industrial temperature range, features Ioff for partial-power-down protection, and delivers typical ground bounce <0.6 V. It is used in high-speed backplane and transmission-line interfacing applications requiring low-noise bus isolation and register-controlled data routing.
For engineers reviewing the 74FCT162646CTPVCT datasheet, 74FCT162646CTPVCT pinout, 74FCT162646CTPVCT application, or 74FCT162646CTPVCT equivalent, key selection criteria include its 5.4 ns bus-to-bus propagation delay, 24 mA balanced drive strength, SSOP-56 package compatibility, and support for real-time and registered data multiplexing between A and B buses.
Technical Context
This device integrates two independent 8-bit D-type registers per direction (A→B and B→A), clocked by separate CLKAB/CLKBA inputs, with output enable (OE) and direction (DIR) control enabling flexible bus arbitration. Its edge-rate controlled outputs suppress switching noise, and Ioff circuitry disables outputs during power-down to prevent backflow current.
The 74FCT162646CTPVCT implements source-select logic via SAB/SBA pins to choose between transparent (real-time) or registered data paths, allowing simultaneous storage and selective output of data from either bus. Its balanced 24 mA drivers eliminate need for external termination on transmission lines while minimizing undershoot and ground bounce.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC | 5 V ±10% - compatible with standard TTL/CMOS 5V systems without level-shifting. |
| Propagation Delay (Bus-to-Bus) | 1.5–5.4 ns - enables sub-200 MHz synchronous bus operation with tight timing margins. |
| Output Drive Strength | ±24 mA - balanced sourcing/sinking capability reduces signal asymmetry on transmission lines. |
| Ground Bounce (VOLP) | <0.6 V at VCC = 5 V, TA = 25°C - ensures stable logic thresholds under heavy capacitive loading. |
| Operating Temperature | −40°C to +85°C - qualified for industrial environments including factory automation and telecom infrastructure. |
| Ioff Support | Yes - prevents damaging current flow when VCC = 0 V and I/O pins are driven externally. |
| Package | SSOP-56 (O56), 300-mil width - surface-mount compatible with standard PCB assembly processes. |
Pinout & Package
74FCT162646CTPVCT is housed in a 56-pin Shrink Small Outline Package (SSOP), 300-mil body width, JEDEC MO-118 compliant, with 0.025-inch pitch. Pin 1 marked by notch or dot; leads are gull-wing, lead-free (CU NIPDAU), MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A8, 2A1–2A8 | A-bus data inputs / B-bus data outputs | Register A input ports; also serve as three-state outputs to B bus when DIR = LOW and OE = LOW. |
| 1B1–1B8, 2B1–2B8 | B-bus data inputs / A-bus data outputs | Register B input ports; also serve as three-state outputs to A bus when DIR = HIGH and OE = LOW. |
| 1CLKAB, 2CLKAB | A→B register clock | Latches A-bus data into Register A on LOW-to-HIGH transition; controls A→B registered path. |
| 1CLKBA, 2CLKBA | B→A register clock | Latches B-bus data into Register B on LOW-to-HIGH transition; controls B→A registered path. |
| 1DIR, 2DIR | Direction control | When HIGH: enables B→A data flow; when LOW: enables A→B data flow - determines destination bus. |
| 1OE, 2OE | Output enable (active LOW) | Disables all outputs (puts them in high-impedance state) when HIGH; required for bus sharing. |
| 1SAB, 2SAB | Source select A→B | Selects real-time (SAB = LOW) or registered (SAB = HIGH) A-bus data for output to B bus. |
| 1SBA, 2SBA | Source select B→A | Selects real-time (SBA = LOW) or registered (SBA = HIGH) B-bus data for output to A bus. |
| VCC, GND | Power supply | Single 5V supply with multiple VCC/GND pairs distributed across package for low-impedance decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| 24 mA balanced output drivers | Reduces need for external series termination resistors and minimizes signal distortion on matched-impedance lines. |
| Ioff partial-power-down support | Prevents backflow current when powered down, enabling hot-swap and mixed-voltage system interoperability. |
| Edge-rate controlled outputs | Suppresses EMI and crosstalk in dense PCB layouts by limiting dV/dt without sacrificing speed. |
| Typical output skew < 250 ps | Ensures deterministic timing across all 16 bits - critical for parallel bus integrity and setup/hold margin. |
| Real-time + registered data multiplexing | Enables hybrid operation: some channels pass through live data while others output stored register contents. |
Applications
| High-Speed Backplane Interface | Industrial PLC I/O Module |
|---|---|
Use Scenario: Interfacing microcontroller local bus to multi-drop backplane carrying sensor/actuator data across chassis. IC Role / Device Role / Timing Role: Bidirectional registered transceiver buffering and isolating CPU address/data bus from noisy backplane signals. Use Value: 5.4 ns propagation delay and 24 mA drive ensure reliable 100+ MHz bus cycles; Ioff protects CPU during hot-plug module insertion. | Use Scenario: Isolating field-side digital I/O signals from controller-side logic in programmable logic controllers. IC Role / Device Role / Timing Role: Direction-controlled, register-staged data transfer between isolated 24V I/O banks and 5V logic domain. Use Value: Dual-register architecture allows asynchronous capture of field inputs followed by synchronized output to CPU - eliminates metastability risk. |
| Telecom Line Card Data Multiplexing | Test Equipment Signal Routing |
Use Scenario: Routing time-multiplexed TDM frames between DSPs and line interface units in access equipment. IC Role / Device Role / Timing Role: Registered transceiver selecting between live frame data and buffered configuration words for channel provisioning. Use Value: SAB/SBA source-select logic enables dynamic switching between real-time and stored data without bus contention. | Use Scenario: Reconfigurable signal path switching in automated test systems handling multiple DUT interfaces. IC Role / Device Role / Timing Role: Programmable bidirectional bus gate with register hold capability for test pattern staging and response capture. Use Value: Independent CLKAB/CLKBA clocks allow concurrent registration of stimulus and response data streams on same device. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY74FCT16646CTPVCT | Higher drive (64 mA sink / 32 mA source); no current-limiting resistors; higher ground bounce (≤1.0 V). | Better suited for driving high-capacitance backplanes; less ideal for impedance-matched transmission lines. | Select when load capacitance >100 pF or termination resistors are already present. |
| 74FCT162646ATPVCT | Slower speed grade: 6.3 ns max bus-to-bus delay vs. 5.4 ns for 74FCT162646CTPVCT. | Lower maximum operating frequency; identical drive strength and noise performance. | Select only if timing budget permits relaxed delay or cost optimization is prioritized over speed. |
Compared with CY74FCT16646CTPVCT and 74FCT162646ATPVCT, the 74FCT162646CTPVCT offers optimal balance of speed (5.4 ns), low-noise 24 mA drive, and transmission-line compatibility - making it preferred for high-fidelity signal routing where ground bounce and edge integrity are critical.
Availability
74FCT162646CTPVCT is available at Aetrix Electronics and suitable for industrial PLC I/O modules, telecom line card interfaces, high-speed backplane designs, and automated test equipment requiring stable component supply and long-term manufacturability.
Supply support for 74FCT162646CTPVCT 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 and embedded processing solutions, with deep expertise in high-speed logic, interface, and timing products since the 1980s.
The FCT logic family - including 74FCT162646CTPVCT - was engineered for industrial-grade noise immunity, 5V system interoperability, and robust bus interface performance in mission-critical infrastructure applications.
FAQ
What is the maximum clock frequency supported by the 74FCT162646CTPVCT?
The 74FCT162646CTPVCT does not specify a maximum clock frequency in its datasheet; instead, timing is defined by minimum pulse width (5.0 ns) and setup/hold times (2.0 ns SU / 1.5 ns H). Based on 5.4 ns propagation delay and typical system margins, it reliably supports clock rates up to 125 MHz in well-designed PCB layouts with controlled impedance and proper termination.
Does the 74FCT162646CTPVCT support hot-swap operation?
Yes, the 74FCT162646CTPVCT supports hot-swap operation via its Ioff feature: when VCC = 0 V, the outputs are disabled and high-impedance, preventing current backflow from live bus lines into the unpowered device. This protects both the 74FCT162646CTPVCT and upstream drivers during live insertion/removal in modular systems.
How does the 74FCT162646CTPVCT differ from the CY74FCT16646T series?
The 74FCT162646CTPVCT uses balanced 24 mA output drivers with integrated current-limiting resistors to reduce ground bounce (<0.6 V) and simplify transmission-line design. In contrast, the CY74FCT16646T provides asymmetric 64 mA sink / 32 mA source drive optimized for high-capacitance loads but exhibits higher ground bounce (≤1.0 V), making it less suitable for impedance-critical routing.
Can the 74FCT162646CTPVCT operate at 3.3V?
No, the 74FCT162646CTPVCT is specified only for VCC = 5 V ±10% (4.5 V to 5.5 V). Its input thresholds (VIH = 2.0 V, VIL = 0.8 V) and output drive characteristics are designed for 5V TTL/CMOS compatibility. Operation below 4.5 V may result in undefined logic states, reduced noise margin, or failure to meet timing specifications.
What is the function of the SAB and SBA pins on the 74FCT162646CTPVCT?
The SAB (Source A→B) and SBA (Source B→A) pins on the 74FCT162646CTPVCT control whether the output on each transceiver channel reflects real-time bus data (SAB/SBA = LOW) or registered data stored in the internal A/B registers (SAB/SBA = HIGH). This enables flexible multiplexing - for example, outputting live sensor data on some lanes while holding configuration words on others - all within one device.
74FCT162646CTPVCT 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:
- 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
74FCT162646CTPVCT FAQ
1.How can I place an order for 74FCT162646CTPVCT through Aetrix?
Please submit a Request for Quotation (RFQ) for 74FCT162646CTPVCT 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 74FCT162646CTPVCT reliable?
The price and inventory of 74FCT162646CTPVCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT162646CTPVCT is usually 5 days.
3.What payment methods are accepted for 74FCT162646CTPVCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74FCT162646CTPVCT transactions.
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4.How is shipping managed for 74FCT162646CTPVCT?
74FCT162646CTPVCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74FCT162646CTPVCT 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 74FCT162646CTPVCT?
For technical support, including 74FCT162646CTPVCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT162646CTPVCT requirements.
6.How does Aetrix verify that 74FCT162646CTPVCT is sourced from the original manufacturer or authorized distributors?
All 74FCT162646CTPVCT 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 74FCT162646CTPVCT meets industry standards.
7.What is the process for return or replacement of 74FCT162646CTPVCT?
All 74FCT162646CTPVCT units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT162646CTPVCT, 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 74FCT162646CTPVCT part is unused and in its original packaging.
Return procedure for 74FCT162646CTPVCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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