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Texas Instruments CY74FCT2574ATSOCT
- Part No.:
- CY74FCT2574ATSOCT
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT2574ATSOCT.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,390
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Product details
Overview
CY74FCT2574ATSOCT from Texas Instruments is an 8-bit edge-triggered D-type flip-flop register with 3-state outputs, designed for high-speed bus interface applications. It features 25-Ω output series resistors, 250-MHz typical switching rate, 12-mA sink/15-mA source drive, and Ioff support for partial-power-down operation in mixed-voltage systems.
For engineers reviewing the CY74FCT2574ATSOCT datasheet, CY74FCT2574ATSOCT pinout, CY74FCT2574ATSOCT application, or CY74FCT2574ATSOCT equivalent, key selection criteria include propagation delay (5.2 ns max), 3-state enable timing (tPZH/tPLZ ≤ 5 ns), output impedance matching, and SOIC-20 package compatibility with legacy FCT logic designs.
Technical Context
This device implements eight independent D-type flip-flops sharing a common buffered clock (CP) and active-low output-enable (OE) control. Each flip-flop captures D-input state on the low-to-high CP transition and holds it until the next clock edge, with outputs entering high-impedance when OE is high.
Edge-rate control circuitry and integrated 25-Ω series termination resistors suppress transmission-line reflections, while matched rise/fall times and TTL-compatible input thresholds (VIH = 2 V min, VIL = 0.8 V max) ensure robust interoperability with legacy 5-V logic families.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay (tPLH/tPHL) | 5.2 ns max - ensures sub-6-ns timing margin for 100-MHz synchronous bus operation |
| Output Drive Strength | 12 mA sink / 15 mA source - supports direct driving of 50-pF loads without external buffers |
| Supply Voltage Range | 4.75 V to 5.25 V - tight 5-V tolerance enables stable operation across industrial temperature range |
| Ioff Current | ±1 µA at VCC = 0 V - prevents backflow current during partial power-down, protecting powered subsystems |
| 3-State Enable/Disable Time | tPZH/tPLZ ≤ 5 ns - minimizes bus contention window during output state transitions |
| Input Hysteresis | 0.2 V - improves noise immunity against slow-rising or noisy control signals like OE |
| ESD Protection | 2000-V HBM / 200-V MM / 1000-V CDM - exceeds JEDEC JESD22 requirements for board-level reliability |
Pinout & Package
Package: SOIC-20 (DW), 7.6 mm × 12.83 mm body, 1.27 mm pitch, 2.65 mm max height, RoHS-compliant NIPDAU lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-low output enable | Controls all 8 outputs simultaneously; high = high-impedance, low = data-driven |
| 2–9 (D0–D7) | Data inputs | Independent D-type latch inputs; each sampled on rising CP edge |
| 10 (GND) | Ground reference | Primary return path for logic and output currents; decoupling required within 10 mm |
| 11 (VCC) | Power supply | 5-V nominal supply; requires local 0.1-µF ceramic bypass capacitor |
| 12–19 (O0–O7) | 3-state outputs | Octal registered outputs with integrated 25-Ω series resistance for reflection damping |
| 20 (CP) | Buffered clock input | Edge-triggered clock with hysteresis; low-to-high transition latches all D inputs |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω output series resistors | Reduces PCB-level transmission-line reflections without discrete termination components |
| Matched rise/fall times | Minimizes duty-cycle distortion in clock distribution and data capture paths |
| TTL-compatible input thresholds | Ensures reliable interfacing with legacy 5-V microcontrollers, FPGAs, and ASICs |
| Edge-rate controlled outputs | Suppresses simultaneous switching noise (SSN) in dense bus environments |
| Partial-power-down support (Ioff) | Enables safe hot-insertion and mixed-supply system partitioning without isolation circuitry |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module Bus Latching |
|---|---|
Use Scenario: Synchronizing sensor data from multiple analog front-ends into a shared CAN/FlexRay controller bus. IC Role / Device Role / Timing Role: 8-bit parallel-to-bus register providing setup/hold-compliant data staging before transmission. Use Value: 2-ns setup time and 1.5-ns hold time guarantee clean sampling of asynchronous ADC outputs under 85°C ambient. | Use Scenario: Capturing switch matrix states (door locks, lighting, HVAC controls) for centralized ECU polling. IC Role / Device Role / Timing Role: Input latch buffering mechanical contact bounce and isolating noisy 12-V domains from 5-V logic rails. Use Value: Ioff protection prevents backfeed from live 12-V domains into unpowered 5-V MCU sections during sleep mode. |
| Legacy 5-V FPGA I/O Expansion | Test Equipment Digital Pattern Generator |
Use Scenario: Extending limited FPGA GPIO count to drive 8-bit status LEDs, relays, or display segments. IC Role / Device Role / Timing Role: Registered output buffer enabling glitch-free updates synchronized to FPGA clock domain. Use Value: 5.2-ns max tPLH allows full 8-bit parallel update within one 100-MHz FPGA clock cycle. | Use Scenario: Generating precise, jitter-controlled digital stimulus waveforms for IC functional validation. IC Role / Device Role / Timing Role: High-fidelity pattern storage element with deterministic edge alignment to system clock. Use Value: Matched rise/fall times and 250-MHz switching capability maintain <100-ps edge skew across all 8 outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY74FCT2574CTSOCT | 5.2-ns max propagation delay vs. 6.5 ns for CY74FCT2574ATSOCT; identical pinout and function | Targeted for higher-speed designs requiring tighter timing margins | Select when tPLH/tPHL ≤ 5.2 ns is mandatory and VCC stability > ±2.5% is guaranteed |
| SN74FCT574NSR | Same SOIC-20 footprint but lacks integrated 25-Ω output resistors and Ioff; 10-ns max tPLH | Suitable for cost-sensitive, non-noise-critical applications where external termination is acceptable | Choose only if board layout allows discrete 25-Ω series resistors and partial-power-down is not required |
Compared with CY74FCT2574CTSOCT, the CY74FCT2574ATSOCT trades 1.3 ns of propagation delay margin for broader voltage tolerance and lower dynamic current; versus SN74FCT574NSR, it adds integrated signal integrity features and power-down safety at minimal cost premium.
Availability
CY74FCT2574ATSOCT is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and test equipment requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for CY74FCT2574ATSOCT 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.
The CY74FCT2574ATSOCT belongs to TI's FCT logic family, engineered for noise-immune 5-V bus interfacing with integrated signal conditioning and power-management features.
FAQ
What is the maximum operating temperature range for CY74FCT2574ATSOCT?
The CY74FCT2574ATSOCT is rated for operation from –40°C to +85°C ambient temperature, validated per TI's recommended operating conditions. This range covers industrial and automotive under-hood applications where thermal cycling and sustained high-temperature operation are critical. The SOIC-20 package exhibits 58°C/W junction-to-ambient thermal resistance, supporting continuous operation at full speed within this envelope when properly heatsinked.
Does CY74FCT2574ATSOCT support hot-swap or partial-power-down operation?
Yes, CY74FCT2574ATSOCT includes Ioff circuitry that disables outputs and limits reverse current to ±1 µA when VCC = 0 V and outputs are biased to 4.5 V. This feature enables safe insertion into live backplanes and coexistence with other powered devices in mixed-supply systems, eliminating need for external isolation MOSFETs or diodes in CY74FCT2574ATSOCT-based designs.
How does the 25-Ω output series resistor in CY74FCT2574ATSOCT improve signal integrity?
The integrated 25-Ω series resistor in CY74FCT2574ATSOCT matches typical PCB trace impedance (50–75 Ω) to dampen reflections at the driver end, reducing ringing and overshoot without requiring external components. This design lowers simultaneous switching noise (SSN), improves eye diagram opening, and eliminates layout-dependent tuning-directly enhancing timing margin and EMC performance in CY74FCT2574ATSOCT bus applications.
What is the minimum setup time required for D-inputs relative to the CP rising edge in CY74FCT2574ATSOCT?
The CY74FCT2574ATSOCT requires a minimum setup time (tsu) of 1.5 ns for all D-inputs before the low-to-high CP transition, verified across –40°C to +85°C and 4.75–5.25 V VCC. This value ensures reliable data capture even under worst-case process/voltage/temperature corners, and must be met by upstream drivers to prevent metastability or incorrect latching in CY74FCT2574ATSOCT-based synchronous systems.
Can CY74FCT2574ATSOCT directly interface with 3.3-V logic devices?
No-CY74FCT2574ATSOCT is a 5-V-only device with TTL-compatible input thresholds (VIH = 2 V min, VIL = 0.8 V max) and 5-V output swing (VOH ≈ 3.3 V typ). While its inputs accept 3.3-V logic HIGH, its outputs exceed 3.3-V absolute maximum ratings of many 3.3-V receivers. Direct connection requires level-shifting or buffer isolation; CY74FCT2574ATSOCT is intended for pure 5-V or mixed-voltage systems with proper translation.
CY74FCT2574ATSOCT 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:
- 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:
- 250 MHz
- Max Propagation Delay @ V, Max CL:
- 10ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 15mA, 12mA
- 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
CY74FCT2574ATSOCT FAQ
1.How can I place an order for CY74FCT2574ATSOCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT2574ATSOCT 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 CY74FCT2574ATSOCT reliable?
The price and inventory of CY74FCT2574ATSOCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT2574ATSOCT is usually 5 days.
3.What payment methods are accepted for CY74FCT2574ATSOCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT2574ATSOCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT2574ATSOCT?
CY74FCT2574ATSOCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT2574ATSOCT 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 CY74FCT2574ATSOCT?
For technical support, including CY74FCT2574ATSOCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT2574ATSOCT requirements.
6.How does Aetrix verify that CY74FCT2574ATSOCT is sourced from the original manufacturer or authorized distributors?
All CY74FCT2574ATSOCT 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 CY74FCT2574ATSOCT meets industry standards.
7.What is the process for return or replacement of CY74FCT2574ATSOCT?
All CY74FCT2574ATSOCT units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT2574ATSOCT, 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 CY74FCT2574ATSOCT part is unused and in its original packaging.
Return procedure for CY74FCT2574ATSOCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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