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Texas Instruments CY74FCT16823ATPACT
- Part No.:
- CY74FCT16823ATPACT
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
CY74FCT16823ATPACT.pdf
- Description:
- IC FF D-TYPE DUAL 9BIT 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,372
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Product details
Overview
CY74FCT16823ATPACT from Texas Instruments is an 18-bit, dual 9-bit bus interface register with asynchronous clear, clock enable, and three-state outputs. It operates at 5V ±10%, supports industrial temperature range (−40°C to +85°C), delivers 64 mA sink / 32 mA source drive, and achieves 10 ns max CLK-to-Q propagation delay under 50 pF load - ideal for high-speed backplane interfacing in telecom and industrial control systems.
For engineers reviewing the CY74FCT16823ATPACT datasheet, CY74FCT16823ATPACT pinout, CY74FCT16823ATPACT application, or CY74FCT16823ATPACT equivalent, key selection criteria include Ioff-enabled partial-power-down operation, ground-bounce performance (<1.0 V VOLP), flow-through pinout for PCB routing simplicity, and TSSOP-56 packaging compatibility with high-density layouts.
Technical Context
This device implements two independent 9-bit registers sharing common control signals (CLK, CLKEN, CLR, OE), enabling synchronized 18-bit latching with minimal skew (<0.5 ns output skew). Its TTL-compatible inputs and FCT-family output drivers ensure interoperability with legacy 5V logic while maintaining low noise via edge-rate control circuitry.
The CY74FCT16823ATPACT uses active-low asynchronous clear (CLR) and output enable (OE), plus clock-enable (CLKEN) to gate register updates without disrupting clock distribution. Ioff protection disables outputs during power-down, preventing backflow current when VCC = 0 V and input/output voltages reach up to 4.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 5 V ±10% - ensures compatibility with standard 5V logic rails and tolerance to supply ripple in noisy industrial environments. |
| Propagation Delay (tPLH/tPHL) | 10 ns max (CL = 50 pF, RL = 500 Ω) - enables reliable timing closure in sub-25 MHz synchronous bus applications. |
| Output Drive | 64 mA sink / 32 mA source - sufficient to drive heavy capacitive loads (e.g., >100 pF traces) and low-impedance backplanes without external buffers. |
| Ground Bounce (VOLP) | <1.0 V at VCC = 5 V, TA = 25 °C - reduces signal integrity risk during simultaneous switching, critical for stable multi-bit data capture. |
| Ioff Current | 1 µA max at VCC = 0 V, VOUT ≤ 4.5 V - guarantees safe hot-insertion and partial-power-down operation in modular systems. |
| Operating Temperature | −40 °C to +85 °C - validated for continuous operation in industrial control cabinets and outdoor telecom enclosures. |
| ESD Rating | >2000 V HBM - provides robust handling margin during board assembly and field service without additional protection circuitry. |
Pinout & Package
Package: 56-pin TSSOP (DGG), 240-mil body width, 0.5 mm pitch, 1.2 mm max height - optimized for automated placement and high-density PCB layouts with thermal relief via solder mask defined pads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1CLR, 2CLR | Asynchronous Clear (Active LOW) | Forces all Q outputs LOW independently of clock; used for system reset or fault recovery without waiting for clock edge. |
| 1CLK, 2CLK | Clock Inputs | Edge-triggered sampling of D inputs; dual-clock structure allows staggered or mirrored register updates across 18-bit bus. |
| 1CLKEN, 2CLKEN | Clock Enable (Active LOW) | Gates clock propagation to internal flip-flops - enables dynamic clock gating for power reduction without changing clock tree. |
| 1OE, 2OE | Output Enable (Active LOW) | Places corresponding 9-bit output group into high-impedance state; supports bidirectional bus sharing and hot-swap isolation. |
| D1–D18 | Data Inputs | 18 parallel TTL-compatible inputs accepting VIH ≥ 2.0 V, VIL ≤ 0.8 V - interfaces directly with microcontrollers, FPGAs, and legacy ASICs. |
| Q1–Q18 | Three-State Outputs | 18 buffered, rail-to-rail CMOS outputs with controlled edge rates - minimizes EMI and crosstalk on shared data buses. |
| VCC, GND | Power & Ground | Multiple VCC/GND pairs (pins 12/13/25/26/39/40/53/54) reduce power delivery impedance and suppress simultaneous switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Ioff Partial-Power-Down Support | Enables safe operation in mixed-voltage systems where VCC may be unpowered while I/O lines remain live - prevents latch-up and backfeed damage. |
| Edge-Rate Controlled Outputs | Reduces radiated emissions and crosstalk by limiting dV/dt on all 18 outputs - eliminates need for series termination resistors in most point-to-point links. |
| Flow-Through Pinout | Input pins on one side, outputs on opposite side, with clock/clear/enable grouped centrally - simplifies layer stack routing and minimizes trace length mismatch. |
| Low Ground Bounce (VOLP) | <1.0 V peak undershoot under full 18-bit switching - maintains valid logic thresholds at receivers even during worst-case simultaneous output transitions. |
| Industrial Temperature Range | Validated operation from −40 °C to +85 °C - qualified for use in motor drives, PLC I/O modules, and base station control cards without derating. |
Applications
| Telecom Backplane Interface | Industrial PLC I/O Expansion |
|---|---|
|
Use Scenario: Interfacing FPGA-based line cards to legacy 5V parallel bus backplanes in central office switches. IC Role / Device Role / Timing Role: 18-bit registered data latch synchronizing burst transfers between clock domains while suppressing ground bounce-induced bit errors. Use Value: 10 ns propagation delay and <1.0 V VOLP ensure setup/hold margins are met across 20 cm backplane traces loaded to 80 pF per line. |
Use Scenario: Adding isolated digital input/output capability to programmable logic controller mainframes via modular carrier boards. IC Role / Device Role / Timing Role: Bus interface register buffering sensor/actuator data between field-side isolation barriers and CPU-side parallel bus. Use Value: Ioff support allows hot-swap insertion of I/O modules without powering down the entire controller chassis. |
| Test Equipment Data Capture | Automated Test Fixture Control |
|
Use Scenario: Capturing parallel status signals from DUTs (devices under test) in ATE systems operating at 20 MHz sample rate. IC Role / Device Role / Timing Role: High-speed 18-bit register capturing synchronized diagnostic bus snapshots on each clock edge. Use Value: 0.5 ns output skew ensures all 18 bits arrive at the acquisition ADC within a single sampling window, eliminating inter-bit timing skew errors. |
Use Scenario: Driving relay banks and LED indicators in semiconductor handler test fixtures requiring precise timing and noise immunity. IC Role / Device Role / Timing Role: Output register controlling 18-channel actuator sequencing with deterministic enable/disable timing. Use Value: 12 ns max OE-to-Q enable time and 7 ns disable time allow sub-100 ns response to test sequence commands. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 18-bit bus interface register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY74FCT16823CTPACT | 6 ns max CLK-to-Q propagation delay (vs. 10 ns); otherwise identical pinout, function, and drive strength. | Better suited for higher-frequency bus cycles (>25 MHz) where tighter timing margins are required. | Select CY74FCT16823CTPACT when system clock period is <40 ns and setup/hold slack is marginal with the 'A' speed grade. |
| CY74FCT162823ATPACT | 24 mA balanced output drivers (vs. 64/32 mA asymmetrical); lower VOLP (<0.6 V); no Ioff support. | Optimized for transmission-line driving (e.g., unterminated stubs) rather than high-capacitance backplanes. | Choose CY74FCT162823ATPACT for point-to-point LVCMOS-like signaling over 50 Ω traces; avoid where Ioff or heavy capacitive loading is needed. |
Compared with CY74FCT16823CTPACT, the CY74FCT16823ATPACT trades 4 ns of propagation delay for broader voltage margin and identical power-down safety; versus CY74FCT162823ATPACT, it prioritizes high-current drive and Ioff over ultra-low ground bounce and line-driving optimization.
Availability
CY74FCT16823ATPACT is available at Aetrix Electronics and suitable for telecom backplane interfacing, industrial PLC I/O expansion, automated test equipment data capture, and semiconductor handler fixture control requiring stable component supply across extended product lifecycles.
Supply support for CY74FCT16823ATPACT 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 logic solutions for industrial, automotive, and communications markets - with over 50 years of logic IC innovation.
The CY74FCT16823ATPACT belongs to TI's FCT logic family, engineered specifically for high-speed, low-noise 5V bus interfacing in mission-critical industrial and telecom infrastructure where reliability, timing precision, and power-down safety are non-negotiable.
FAQ
What is the maximum clock frequency supported by CY74FCT16823ATPACT?
CY74FCT16823ATPACT does not specify a maximum clock frequency directly, but its 10 ns max CLK-to-Q propagation delay and 6 ns min CLK pulse width imply reliable operation up to approximately 25 MHz in typical 50 pF load conditions. System-level timing must account for setup/hold times (3.0 ns SU, 1.5 ns H) and board trace delays. For sustained 33 MHz operation, CY74FCT16823CTPACT is recommended.
Does CY74FCT16823ATPACT support hot-swap or partial-power-down operation?
Yes, CY74FCT16823ATPACT features Ioff circuitry that disables outputs when VCC = 0 V, limiting off-state current to 1 µA max even if input/output pins are biased up to 4.5 V. This enables safe insertion/removal in live backplanes and mixed-supply systems - a core design requirement validated per JEDEC JESD78.
What is the meaning of "flow-through pinout" for CY74FCT16823ATPACT?
The flow-through pinout of CY74FCT16823ATPACT places all 18 data inputs (D1–D18) on one side of the TSSOP-56 package and all 18 outputs (Q1–Q18) on the opposite side, with control signals (CLK, CLR, OE, CLKEN) centered. This layout minimizes crossing traces, reduces layer count, and improves signal integrity by enabling straight-through routing on PCBs.
How does CY74FCT16823ATPACT differ from CY74FCT162823ATPACT in driver capability?
CY74FCT16823ATPACT provides asymmetric 64 mA sink / 32 mA source drive optimized for driving heavy capacitive loads like backplanes, whereas CY74FCT162823ATPACT uses balanced 24 mA drivers with built-in current-limiting resistors - reducing ground bounce (<0.6 V) and enabling direct connection to 50 Ω transmission lines without external termination.
Is CY74FCT16823ATPACT still in active production or obsolete?
CY74FCT16823ATPACT is marked "Obsolete" in TI's official packaging addendum, but Aetrix Electronics maintains verified inventory with full traceability and offers lifecycle coordination support. Engineering samples and last-time-buy quantities are available with documentation confirming functional equivalence to original TI specifications.
CY74FCT16823ATPACT 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
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 2
- Number of Bits per Element:
- 9
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- 20ns @ 5V, 300pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 500 µA
- Input Capacitance:
- 4.5 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-TSSOP
CY74FCT16823ATPACT FAQ
1.How can I place an order for CY74FCT16823ATPACT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT16823ATPACT 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 CY74FCT16823ATPACT reliable?
The price and inventory of CY74FCT16823ATPACT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT16823ATPACT is usually 5 days.
3.What payment methods are accepted for CY74FCT16823ATPACT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT16823ATPACT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT16823ATPACT?
CY74FCT16823ATPACT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT16823ATPACT 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 CY74FCT16823ATPACT?
For technical support, including CY74FCT16823ATPACT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT16823ATPACT requirements.
6.How does Aetrix verify that CY74FCT16823ATPACT is sourced from the original manufacturer or authorized distributors?
All CY74FCT16823ATPACT 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 CY74FCT16823ATPACT meets industry standards.
7.What is the process for return or replacement of CY74FCT16823ATPACT?
All CY74FCT16823ATPACT units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT16823ATPACT, 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 CY74FCT16823ATPACT part is unused and in its original packaging.
Return procedure for CY74FCT16823ATPACT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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