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Texas Instruments CY74FCT574TQCTG4
- Part No.:
- CY74FCT574TQCTG4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
CY74FCT574TQCTG4.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,687
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Product details
Overview
CY74FCT574TQCTG4 from Texas Instruments is a high-speed, low-power octal D-type flip-flop with 3-state outputs, edge-triggered clock input (CP), and output-enable (OE) control. It features 64-mA sink / 32-mA source drive strength, 10 ns max propagation delay (tPLH/tPHL), and operates over –40°C to 85°C at VCC = 4.75–5.25 V. It is used in bus-oriented data latching and buffering applications in industrial control backplanes.
For engineers reviewing the CY74FCT574TQCTG4 datasheet, CY74FCT574TQCTG4 pinout, CY74FCT574TQCTG4 application, or CY74FCT574TQCTG4 equivalent, key selection criteria include 3-state bus interface capability, Ioff partial-power-down support, TTL-compatible input thresholds, matched rise/fall times, and QSOP-20 package compatibility with space-constrained PCB layouts.
Technical Context
This device implements eight independent edge-triggered D-type flip-flops sharing a common buffered clock (CP) and active-low output-enable (OE). On the low-to-high CP transition, each flip-flop captures its respective D-input state, provided setup (2 ns) and hold (1.5 ns) timing requirements are met.
When OE is low, stored data appears on the 3-state outputs (O0–O7); when OE is high, all outputs enter high-impedance state regardless of flip-flop content. The Ioff circuitry disables outputs during power-down to prevent backflow current, enabling safe hot-insertion and partial-power-down system operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.75 V to 5.25 V - Ensures stable operation under standard 5-V supply with ±5% tolerance. |
| Max Propagation Delay (tPLH/tPHL) | 10 ns - Enables reliable operation in systems with ≥50-MHz clock domains and tight timing budgets. |
| Output Drive (IOL/IOH) | 64 mA sink / 32 mA source - Supports direct driving of multiple TTL loads or termination-resistor networks without buffers. |
| Input Thresholds (VIH/VIL) | 2.0 V / 0.8 V - Fully compatible with standard TTL logic levels for seamless interfacing. |
| Ioff Leakage | ±1 µA at VCC = 0 V - Prevents damaging current flow during partial-power-down or hot-swap events. |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - Meets industrial-grade robustness requirements without external protection. |
| Operating Temperature | –40°C to +85°C - Qualified for extended-temperature industrial environments including factory automation and motor drives. |
Pinout & Package
The CY74FCT574TQCTG4 is housed in a 20-pin QSOP (DBQ) package with 0.65-mm lead pitch and 7.2-mm body width, optimized for automated assembly and thermal performance (θJA = 68°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | D0–D7 | Data inputs for each of eight D-type flip-flops; sampled on rising CP edge. |
| 9 | GND | Ground reference for all internal logic and output drivers. |
| 10, 20 | VCC | Primary 5-V power supply; dual VCC pins reduce supply impedance and improve noise immunity. |
| 11–18 | O0–O7 | 3-state outputs; driven by corresponding flip-flop when OE = L; high-Z when OE = H. |
| 19 | CP | Buffered clock input; positive-edge-triggered; controls synchronous capture of all D inputs. |
| 20 | OE | Active-low output-enable; controls bus contention management across shared data paths. |
Key Features
| Feature | Design Value |
|---|---|
| Edge-rate controlled outputs | Reduces simultaneous switching noise (SSN) and EMI in dense bus systems without external series resistors. |
| Matched rise/fall times | Minimizes duty-cycle distortion in clocked data paths, preserving signal integrity for downstream sampling. |
| TTL-compatible input thresholds | Eliminates need for level-shifting circuitry when interfacing with legacy 5-V TTL peripherals or microcontrollers. |
| Ioff partial-power-down support | Enables safe integration into multi-rail systems where VCC may be sequenced or powered down independently. |
| Flow-through pinout (D0–D7 left, O0–O7 right) | Simplifies PCB routing with straight-through trace layout, reducing layer count and crosstalk in high-density designs. |
Applications
| Industrial PLC Backplane | Test Equipment Data Capture |
|---|---|
Use Scenario: Latching parallel sensor data from analog-to-digital converters before transmission over Modbus RTU or CAN bus. IC Role / Device Role / Timing Role: Synchronous data register holding 8-bit sample values until host processor initiates read cycle via OE control. Use Value: 64-mA sink capability drives terminated RS-485 transceiver inputs directly; Ioff prevents backfeed during controller reset sequences. | Use Scenario: Capturing digital stimulus patterns from pattern generators for real-time comparison against DUT responses. IC Role / Device Role / Timing Role: Edge-triggered storage element capturing parallel test vectors synchronized to system clock domain. Use Value: 10 ns max tPLH enables accurate capture at 50 MHz test rates; matched rise/fall ensures clean eye diagrams for high-speed validation. |
| Automotive Body Control Module | Medical Imaging Interface Board |
Use Scenario: Isolating microcontroller GPIOs from high-current door lock actuator drivers using 3-state bus isolation. IC Role / Device Role / Timing Role: Bidirectional bus buffer registering command signals between MCU and peripheral driver ICs. Use Value: Flow-through pinout minimizes trace length mismatch across 8-bit control bus; ESD ratings exceed AEC-Q100 Class 2 requirements. | Use Scenario: Interfacing FPGA-based image processing pipeline with legacy 8-bit CCD sensor modules requiring precise timing alignment. IC Role / Device Role / Timing Role: Synchronizing asynchronous pixel data streams into FPGA clock domain using CP and OE handshaking. Use Value: 2 ns setup/1.5 ns hold times allow reliable capture even with marginal board-level skew; VOH = 2.4 V minimum ensures TTL-compliant detection at FPGA inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74FCT574ATQCT | Same pinout and function but rated for 6.5 ns max propagation delay and 32-mA sink/12-mA source drive. | Lower drive strength limits use in heavily loaded buses; suitable for lower-noise, lower-power subsystems. | Select when reduced EMI and lower ICCD are prioritized over maximum bus fanout. |
| 74ACT574SCX | CMOS-based, 4.5–5.5 V supply, 10.5 ns max tPLH, 24-mA sink/24-mA source, no Ioff support. | Lacks partial-power-down capability; requires external isolation for hot-swap scenarios. | Choose only if existing design uses ACT logic family and Ioff is not required for system architecture. |
Compared with SN74FCT574ATQCT, CY74FCT574TQCTG4 delivers higher drive strength for robust bus signaling; compared with 74ACT574SCX, it adds Ioff and superior noise immunity via edge-rate control-critical for industrial and automotive environments where reliability under partial power loss is mandatory.
Availability
CY74FCT574TQCTG4 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automated test equipment, automotive body control modules, and medical imaging interface boards requiring stable component supply across long production lifecycles.
Supply support for CY74FCT574TQCTG4 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 and automotive qualification expertise.
The FCT logic family-including CY74FCT574TQCTG4-is designed specifically for high-reliability, noise-immune bus interface applications in harsh electromagnetic environments where signal integrity and power sequencing resilience are critical.
FAQ
What is the maximum clock frequency supported by CY74FCT574TQCTG4?
CY74FCT574TQCTG4 supports a typical switching rate of 250 MHz, with guaranteed timing up to 100 MHz based on 10 ns max propagation delay and 2 ns setup/1.5 ns hold windows. System-level maximum frequency depends on board layout, load capacitance, and supply stability-but the device is fully characterized for reliable operation at 50 MHz with margin.
Does CY74FCT574TQCTG4 support partial-power-down operation?
Yes, CY74FCT574TQCTG4 includes Ioff circuitry that disables outputs when VCC = 0 V, limiting leakage to ±1 µA per pin. This allows safe insertion/removal in live backplanes and prevents backflow current during asymmetric power sequencing-essential for modular industrial systems.
What package type is used for CY74FCT574TQCTG4?
CY74FCT574TQCTG4 uses a 20-pin QSOP (DBQ) package with 0.65-mm lead pitch and 7.2-mm body width. It is RoHS-compliant, moisture-sensitive Level-2 (260°C peak reflow), and supplied in tape-and-reel format (2500 units per reel) for automated SMT assembly.
How does the flow-through pinout of CY74FCT574TQCTG4 benefit PCB layout?
The flow-through pinout places D0–D7 on the left side (pins 1–8) and O0–O7 on the right side (pins 11–18), enabling straight-through routing with minimal trace crossing. This reduces layer count, differential skew, and crosstalk-especially valuable in high-density industrial control boards where signal integrity and manufacturability are tightly coupled.
Is CY74FCT574TQCTG4 compatible with standard TTL logic levels?
Yes, CY74FCT574TQCTG4 is fully compatible with TTL input and output logic levels: VIH = 2.0 V min, VIL = 0.8 V max, VOH = 2.4 V min (at IOL = 64 mA), and VOL = 0.55 V max. This eliminates level-shifting components when interfacing with legacy 5-V TTL microcontrollers, FPGAs, or peripheral ICs.
CY74FCT574TQCTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 20-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- 10ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- Current - Quiescent (Iq):
- 200 µA
- Input Capacitance:
- 5 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
CY74FCT574TQCTG4 FAQ
1.How can I place an order for CY74FCT574TQCTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT574TQCTG4 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 CY74FCT574TQCTG4 reliable?
The price and inventory of CY74FCT574TQCTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT574TQCTG4 is usually 5 days.
3.What payment methods are accepted for CY74FCT574TQCTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT574TQCTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT574TQCTG4?
CY74FCT574TQCTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT574TQCTG4 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 CY74FCT574TQCTG4?
For technical support, including CY74FCT574TQCTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT574TQCTG4 requirements.
6.How does Aetrix verify that CY74FCT574TQCTG4 is sourced from the original manufacturer or authorized distributors?
All CY74FCT574TQCTG4 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 CY74FCT574TQCTG4 meets industry standards.
7.What is the process for return or replacement of CY74FCT574TQCTG4?
All CY74FCT574TQCTG4 units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT574TQCTG4, 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 CY74FCT574TQCTG4 part is unused and in its original packaging.
Return procedure for CY74FCT574TQCTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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