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Texas Instruments 74FCT162646CTPACT
- Part No.:
- 74FCT162646CTPACT
- Manufacturer:
- Texas Instruments
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74FCT162646CTPACT.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,459
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Product details
Overview
74FCT162646CTPACT from Texas Instruments is a 16-bit registered transceiver IC with balanced 24 mA output drivers, 5.4 ns bus-to-bus propagation delay, and Ioff partial-power-down support. It operates at 5 V ±10% over −40°C to +85°C and is designed for high-speed bidirectional data routing in backplane and transmission-line applications.
For engineers reviewing the 74FCT162646CTPACT datasheet, 74FCT162646CTPACT pinout, 74FCT162646CTPACT application, or 74FCT162646CTPACT equivalent, key selection criteria include its low ground bounce (<0.6 V), edge-rate controlled outputs, TSSOP-56 package, and compatibility with industrial-grade timing-critical bus interfaces.
Technical Context
This device integrates dual 16-bit D-type registers with 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 between A and B buses. Its architecture enables simultaneous storage and multiplexed output of data from either bus.
It implements Ioff circuitry to disable outputs during power-down, preventing backflow current, and uses integrated current-limiting resistors to reduce system switching noise and eliminate need for external termination-critical for clean signal integrity on transmission lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC | 5 V ±10% - ensures compatibility with standard TTL/CMOS logic rails and stable operation across industrial voltage variation. |
| Propagation Delay | 5.4 ns (bus-to-bus) - enables sub-200 MHz synchronous bus operation with tight timing margins. |
| Output Drive | ±24 mA balanced - provides matched sourcing/sinking for reduced ground bounce and minimal undershoot on transmission lines. |
| Ground Bounce (VOLP) | <0.6 V at VCC = 5 V, TA = 25°C - guarantees signal integrity during high-speed switching without external decoupling overhead. |
| Operating Temperature | −40°C to +85°C - supports deployment in industrial control, telecom infrastructure, and embedded computing environments. |
| Ioff Support | Enabled - allows safe partial-power-down in mixed-voltage systems without risk of damaging current backflow. |
| Package | TSSOP-56 (Z56, 240-mil width) - surface-mount footprint optimized for high-density PCB layouts with JEDEC MO-153 compliance. |
Pinout & Package
74FCT162646CTPACT is housed in a 56-pin Thin Shrunk Small Outline Package (TSSOP), designated Z56 per TI packaging standards, with 0.5 mm pitch, 13.9–14.1 mm body width, and 1.2 mm max height. Pin 1 is marked by a beveled corner and located at top-left when viewed from top with marking side up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A16 | Data Register A Inputs / Outputs | Bi-directional A-bus interface pins; function as inputs when DIR = LOW and OE = LOW (B→A transfer), or outputs when DIR = HIGH and OE = LOW (A→B transfer). |
| B1–B16 | Data Register B Inputs / Outputs | Bi-directional B-bus interface pins; complementary to A pins with opposite directionality under DIR control. |
| CLKAB, CLKBA | Register Clock Inputs | Asynchronous clocks: CLKAB latches A-bus data into B register; CLKBA latches B-bus data into A register. |
| SAB, SBA | Output Source Select | Selects whether output drives real-time bus data (transparent mode) or stored register data (registered mode). |
| DIR | Direction Control | Active-HIGH: enables A→B data flow; Active-LOW: enables B→A data flow - determines bus ownership during OE-active periods. |
| OE | Output Enable (Active LOW) | When HIGH: places all A/B outputs in high-impedance state; when LOW: enables transceiver function per DIR and clock states. |
| VCC, GND | Power Supply | Single 5 V supply with multiple VCC/GND pairs distributed across package for low-inductance decoupling and noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Balanced 24 mA drivers | Matched sourcing/sinking capability minimizes ground bounce and eliminates need for external series termination on PCB traces. |
| Edge-rate control circuitry | Reduces EMI and crosstalk in dense interconnects by limiting slew rate without compromising propagation speed. |
| Ioff partial-power-down | Prevents backflow current when VCC = 0 V, enabling hot-swap and multi-rail power sequencing in modular systems. |
| Low output skew | <500 ps skew across all 32 outputs ensures deterministic timing alignment for parallel bus applications. |
| Industrial temperature range | −40°C to +85°C operation validated across full voltage and load conditions - suitable for uncontrolled ambient deployments. |
Applications
| Backplane Data Routing | High-Speed Bus Interface |
|---|---|
Use Scenario: Bidirectional data exchange between processor and peripheral modules across a 16-bit parallel backplane with stub lengths up to 15 cm. IC Role / Device Role / Timing Role: Registered transceiver providing clocked, isolated bus coupling with direction control and output drive matching trace impedance. Use Value: Enables reliable 100+ MHz bus operation using internal 24 mA drivers and edge-rate control-no external termination resistors required. | Use Scenario: Interfacing FPGA I/O banks to legacy ASIC-based subsystems requiring level-shifted, registered data handshaking. IC Role / Device Role / Timing Role: Timing-isolated bus bridge with independent CLKAB/CLKBA inputs allowing asynchronous domain crossing between clock domains. Use Value: Supports setup/hold times of 2.0 ns/1.5 ns and 5.4 ns propagation - meets tight timing budgets for FPGA-to-ASIC synchronization. |
| Transmission-Line Driver | Industrial Control Backplane |
Use Scenario: Driving 50 Ω controlled-impedance PCB traces in motor control or sensor aggregation nodes with minimal reflection. IC Role / Device Role / Timing Role: Low-noise, current-limited driver with <0.6 V ground bounce ensuring signal fidelity on long point-to-point links. Use Value: Eliminates need for discrete series resistors while maintaining <1% overshoot/undershoot - reduces BOM count and layout area. | Use Scenario: Real-time data aggregation from distributed I/O modules in PLC chassis operating in harsh factory environments. IC Role / Device Role / Timing Role: Robust bus repeater with Ioff support enabling safe firmware updates and module hot-swap without powering down entire backplane. Use Value: −40°C to +85°C rating and 2000 V ESD protection ensure continuous operation in dusty, vibration-prone industrial settings. |
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 |
|---|---|---|---|
| CY74FCT162646CTPVC | Same core logic and electrical specs, but in 56-lead SSOP (O56, 300-mil width) instead of TSSOP-56. | Requires larger PCB footprint and different thermal profile; less suitable for high-density layouts. | Select when SSOP assembly infrastructure is already in place or board rework for TSSOP is not feasible. |
| 74FCT162646ATPACT | Same TSSOP-56 package but with 6.3 ns propagation delay (vs. 5.4 ns); otherwise identical drive strength and Ioff behavior. | Acceptable where timing margin exceeds 0.9 ns; lower speed grade may reduce EMI in noise-sensitive zones. | Choose for cost-sensitive designs where 6.3 ns delay satisfies system timing closure and lower power consumption is prioritized. |
Compared with CY74FCT162646CTPVC and 74FCT162646ATPACT, the 74FCT162646CTPACT delivers the fastest propagation (5.4 ns) in the smallest industrial-grade package, making it optimal for space-constrained, high-throughput backplane and transmission-line applications requiring minimal ground bounce and robust partial-power-down behavior.
Availability
74FCT162646CTPACT is available at Aetrix Electronics and suitable for industrial control backplanes, high-speed FPGA-to-ASIC interfaces, and transmission-line driver applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant green packaging.
Supply support for 74FCT162646CTPACT 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 74FCT162646CTPACT-is engineered for high-speed, low-noise, industrial-temperature operation in mission-critical bus interface and data routing applications.
FAQ
What is the maximum clock frequency supported by the 74FCT162646CTPACT?
The 74FCT162646CTPACT does not specify a maximum clock frequency in its datasheet; instead, it guarantees timing margins via propagation delay (5.4 ns bus-to-bus) and minimum clock pulse width (5.0 ns). Based on these, reliable operation up to approximately 185 MHz is achievable in synchronous bus systems with appropriate setup/hold timing design.
Does the 74FCT162646CTPACT support hot-swap or partial-power-down operation?
Yes, the 74FCT162646CTPACT includes Ioff circuitry that disables outputs when VCC = 0 V, preventing damaging current backflow during hot-swap or partial-power-down sequences. This feature is fully characterized and specified across the industrial temperature range.
What is the meaning of "balanced 24 mA output drivers" in the 74FCT162646CTPACT datasheet?
"Balanced 24 mA output drivers" means the 74FCT162646CTPACT provides symmetrical sourcing (−24 mA) and sinking (+24 mA) capability per output pin under VCC = 5 V, minimizing ground bounce and ensuring consistent signal rise/fall behavior critical for transmission-line driving.
Can the 74FCT162646CTPACT operate at 3.3 V?
No, the 74FCT162646CTPACT is specified only for VCC = 5 V ±10% (4.5 V to 5.5 V). It is not guaranteed to function correctly or meet timing/electrical specifications at 3.3 V, and doing so may result in undefined behavior or damage.
How does the 74FCT162646CTPACT differ from the CY74FCT16646T series?
The 74FCT162646CTPACT features balanced 24 mA drivers and lower ground bounce (<0.6 V), optimized for transmission-line driving, whereas the CY74FCT16646T offers higher 64 mA sink/32 mA source drive for heavy capacitive loads like backplanes. Their pinouts and logic functions are identical, but drive strength and noise characteristics differ.
74FCT162646CTPACT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 56-TFSOP (0.240", 6.10mm 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-TSSOP
74FCT162646CTPACT FAQ
1.How can I place an order for 74FCT162646CTPACT through Aetrix?
Please submit a Request for Quotation (RFQ) for 74FCT162646CTPACT 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 74FCT162646CTPACT reliable?
The price and inventory of 74FCT162646CTPACT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT162646CTPACT is usually 5 days.
3.What payment methods are accepted for 74FCT162646CTPACT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74FCT162646CTPACT transactions.
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4.How is shipping managed for 74FCT162646CTPACT?
74FCT162646CTPACT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74FCT162646CTPACT 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 74FCT162646CTPACT?
For technical support, including 74FCT162646CTPACT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT162646CTPACT requirements.
6.How does Aetrix verify that 74FCT162646CTPACT is sourced from the original manufacturer or authorized distributors?
All 74FCT162646CTPACT 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 74FCT162646CTPACT meets industry standards.
7.What is the process for return or replacement of 74FCT162646CTPACT?
All 74FCT162646CTPACT units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT162646CTPACT, 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 74FCT162646CTPACT part is unused and in its original packaging.
Return procedure for 74FCT162646CTPACT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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