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Texas Instruments CY74FCT574TSOCTG4
- Part No.:
- CY74FCT574TSOCTG4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT574TSOCTG4.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,421
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Product details
Overview
CY74FCT574TSOCTG4 from Texas Instruments is a high-speed, low-power 8-bit edge-triggered D-type flip-flop register with 3-state outputs, designed for bus-oriented digital systems. It features a common buffered clock (CP), output-enable (OE) control, 64-mA sink / 32-mA source drive strength, 5.2-ns maximum propagation delay, and Ioff support for partial-power-down operation in mixed-voltage systems.
For engineers reviewing the CY74FCT574TSOCTG4 datasheet, CY74FCT574TSOCTG4 pinout, CY74FCT574TSOCTG4 application, or CY74FCT574TSOCTG4 equivalent, key selection criteria include 3-state bus interface capability, TTL-compatible input thresholds, 20-pin SOIC package with flow-through pinout, and guaranteed operation from –40°C to +85°C under 4.75–5.25 V supply.
Technical Context
The CY74FCT574TSOCTG4 implements eight independent D-type latches triggered on the low-to-high transition of CP, with synchronous storage and asynchronous 3-state control via OE. Its Ioff circuitry actively disables outputs when VCC = 0 V, preventing backflow current during power sequencing.
It uses FCT logic architecture with edge-rate control to reduce switching noise, matched rise/fall times, and full TTL-level compatibility - accepting 0.8-V VIH and 2.0-V VIH thresholds while driving VOH ≥ 2.4 V at –32 mA and VOL ≤ 0.55 V at 64 mA under 4.75–5.25 V operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | 8-bit positive-edge-triggered D-type register with 3-state outputs |
| Supply Voltage | 4.75–5.25 V - ensures stable operation in 5-V TTL/CMOS hybrid buses |
| Propagation Delay (tPLH/tPHL) | 2–5.2 ns - enables reliable 250-MHz bus timing in high-speed data capture |
| Output Drive | 64 mA sink / 32 mA source - supports heavy capacitive loads and fanout to multiple TTL inputs |
| Ioff Support | Active at VCC = 0 V - allows safe hot-insertion and partial power-down in modular backplanes |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - meets industrial-grade robustness requirements |
| Operating Temperature | –40°C to +85°C - qualified for commercial/industrial ambient environments |
Pinout & Package
Package: 20-pin SOIC (DW), 7.5 mm × 12.8 mm body, 1.27 mm pitch, RoHS-compliant NiPdAu lead finish, MSL Level-1 (unlimited reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | D0–D7 Data Inputs | Asynchronous parallel data inputs sampled on CP↑; TTL-compatible thresholds |
| 9 | GND | Ground reference for all logic and output stages |
| 10 | VCC | 5-V supply rail; decoupling required within 10 mm of pin |
| 11–18 | O0–O7 3-State Outputs | Registered outputs enabled by OE low; high-impedance when OE high |
| 19 | CP | Buffered clock input - edge-triggered on low-to-high transition only |
| 20 | OE | Active-low output-enable - controls all eight outputs simultaneously |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pinout | Input pins (D0–D7) on left side, outputs (O0–O7) on right - simplifies PCB trace routing and reduces crosstalk |
| Edge-rate controlled outputs | Controlled slew rate minimizes simultaneous switching noise (SSN) in dense bus layouts |
| Matched tPLH/tPHL | ≤0.5 ns skew between rising/falling edges - preserves signal integrity in bidirectional data paths |
| TTL-compatible interface | Accepts standard TTL VIH/VIL and drives TTL loads directly - eliminates level-shifter requirements |
| Partial-power-down Ioff | Outputs disabled at VCC = 0 V - prevents backfeeding in powered-down subsystems |
Applications
| Microprocessor Bus Interface | Data Acquisition System |
|---|---|
Use Scenario: Latching address/data bus signals between a microprocessor and peripheral memory or I/O devices. IC Role / Device Role / Timing Role: Synchronizes and buffers 8-bit parallel data on CP↑, isolating bus segments via OE-controlled 3-state outputs. Use Value: Enables clean separation of read/write cycles with 5.2-ns propagation delay and 64-mA drive to overcome bus capacitance. | Use Scenario: Capturing parallel sensor outputs (e.g., ADC results) before serial transmission or processing. IC Role / Device Role / Timing Role: Edge-triggered registration of 8-bit analog-to-digital conversion results synchronized to system clock. Use Value: Guarantees setup/hold compliance (tsu = 2 ns, th = 1.5 ns) and noise-immune sampling via edge-rate control. |
| Industrial Control Backplane | Legacy System Upgrade Module |
Use Scenario: Interfacing modular I/O cards to a central controller over a shared 5-V TTL bus. IC Role / Device Role / Timing Role: Provides isolated, OE-gated data staging between hot-swappable modules and backplane. Use Value: Ioff protection prevents damage during card insertion/removal; 2000-V HBM ESD withstands factory handling. | Use Scenario: Replacing obsolete 74LS374 or 74ALS374 in legacy equipment requiring drop-in timing and drive upgrades. IC Role / Device Role / Timing Role: Pin-compatible functional replacement with improved speed, drive, and power-down safety. Use Value: Same 20-pin SOIC footprint and flow-through pinout as '374-series; 5.2-ns delay vs. 15–25 ns of LS/ALS variants. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit registered bus interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74FCT374SOCT | Same FCT family, but conventional pinout (non-flow-through); 32-mA sink/source drive | Lacks optimized PCB routing benefit; lower drive limits fanout in high-capacitance buses | Select when board layout already accommodates traditional '374 pin mapping and reduced drive suffices |
| 74AC574M | Advanced CMOS; 50-mA drive, wider VCC range (2–6 V), no Ioff or edge-rate control | Not suitable for partial-power-down systems; higher noise emission without slew control | Choose for multi-supply designs needing 3–5 V flexibility, where Ioff and SSN mitigation are not required |
Compared with SN74FCT374SOCT and 74AC574M, the CY74FCT574TSOCTG4 uniquely combines flow-through pinout, 64-mA sink capability, Ioff-enabled hot-swap safety, and edge-rate noise suppression - making it optimal for new industrial bus interface designs demanding reliability, layout efficiency, and legacy compatibility.
Availability
CY74FCT574TSOCTG4 is available at Aetrix Electronics and suitable for industrial control backplanes, microprocessor bus interfaces, data acquisition systems, and legacy system upgrade modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CY74FCT574TSOCTG4 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 heritage in high-reliability logic families including FCT, ABT, and LVT.
The CY74FCT574TSOCTG4 belongs to TI's military- and industrial-grade FCT logic portfolio, engineered specifically for robust 5-V bus interfacing in noise-sensitive, mixed-power-domain systems requiring deterministic timing and fail-safe power sequencing.
FAQ
What is the maximum clock frequency supported by the CY74FCT574TSOCTG4?
The CY74FCT574TSOCTG4 is characterized for 250-MHz typical switching rate and supports reliable operation up to at least 100 MHz in real-world bus applications. Its 5.2-ns maximum propagation delay and 2-ns minimum setup time enable stable capture at 100 MHz with adequate timing margin. The device does not specify a hard maximum clock frequency limit, but timing closure must account for board-level signal integrity and load capacitance.
Does the CY74FCT574TSOCTG4 support partial power-down, and how is it implemented?
Yes, the CY74FCT574TSOCTG4 supports partial power-down via its Ioff circuitry. When VCC = 0 V, the Ioff feature disables all outputs regardless of OE or CP state, limiting leakage current to ±1 µA and preventing damaging backflow current into powered-down sections of the system. This behavior is verified per JESD78 and is critical for hot-swap and modular power architectures.
Is the CY74FCT574TSOCTG4 pin-compatible with the 74LS374 or 74ALS374?
The CY74FCT574TSOCTG4 is functionally compatible and package-compatible (20-pin SOIC) with the 74LS374 and 74ALS374, but uses a flow-through pinout (D0–D7 on left, O0–O7 on right) versus the conventional arrangement. This improves PCB routing but requires layout verification. Electrical compatibility is ensured via TTL-level inputs and outputs, though CY74FCT574TSOCTG4 offers superior speed, drive, and Ioff functionality.
What are the absolute maximum ratings for the CY74FCT574TSOCTG4?
The CY74FCT574TSOCTG4 has an absolute maximum supply voltage of –0.5 V to 7 V, DC input/output voltage range of –0.5 V to 7 V, and maximum DC output sink current of 120 mA per pin. Exceeding these ratings may cause permanent damage. Recommended operating conditions specify VCC = 4.75–5.25 V, TA = –40°C to +85°C, and require all unused inputs tied to VCC or GND.
How does the edge-rate control in the CY74FCT574TSOCTG4 improve system noise performance?
The CY74FCT574TSOCTG4 integrates edge-rate control circuitry that limits output slew rate, reducing simultaneous switching noise (SSN) and electromagnetic interference (EMI). This design significantly improves signal integrity in high-density bus environments - especially when multiple devices switch in parallel - without sacrificing propagation delay, as confirmed by measured tPLH/tPHL matching and jitter specifications in the datasheet.
CY74FCT574TSOCTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-SOIC
CY74FCT574TSOCTG4 FAQ
1.How can I place an order for CY74FCT574TSOCTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT574TSOCTG4 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 CY74FCT574TSOCTG4 reliable?
The price and inventory of CY74FCT574TSOCTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT574TSOCTG4 is usually 5 days.
3.What payment methods are accepted for CY74FCT574TSOCTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT574TSOCTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT574TSOCTG4?
CY74FCT574TSOCTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT574TSOCTG4 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 CY74FCT574TSOCTG4?
For technical support, including CY74FCT574TSOCTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT574TSOCTG4 requirements.
6.How does Aetrix verify that CY74FCT574TSOCTG4 is sourced from the original manufacturer or authorized distributors?
All CY74FCT574TSOCTG4 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 CY74FCT574TSOCTG4 meets industry standards.
7.What is the process for return or replacement of CY74FCT574TSOCTG4?
All CY74FCT574TSOCTG4 units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT574TSOCTG4, 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 CY74FCT574TSOCTG4 part is unused and in its original packaging.
Return procedure for CY74FCT574TSOCTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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