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Texas Instruments CY74FCT374TQC
- Part No.:
- CY74FCT374TQC
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
CY74FCT374TQC.pdf
- Description:
- BUS DRIVER, FCT SERIES
- Quantity:
- Payment:
- Shipping:
Inventory:1,118
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Product details
Overview
CY74FCT374TQC from Cypress Semiconductor is an 8-bit edge-triggered D-type flip-flop register with three-state outputs, buffered clock (CP), and active-low output enable (OE). It operates at 5 V ±5%, delivers 5.2 ns max propagation delay (FCT-C speed grade), supports 250 MHz typical toggle rate, and features power-off disable for live insertion in bus-oriented systems.
For engineers reviewing the CY74FCT374TQC datasheet, CY74FCT374TQC pinout, CY74FCT374TQC application, or CY74FCT374TQC equivalent, key selection criteria include its 20-lead QSOP package, commercial temperature range (–40°C to +85°C), 32 mA output drive capability, and compatibility with TTL-level inputs and outputs in high-speed digital interface designs.
Technical Context
The CY74FCT374TQC implements eight independent D-type flip-flops sharing a common clock and output enable control. Its edge-rate controlled outputs reduce switching noise, while matched rise/fall times ensure clean signal integrity in synchronous bus applications.
It features TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max), 3.3 V typical VOH under load, and power-off disable that limits IOFF to ±1 µA when VCC = 0 V - enabling hot-swap capability without damaging backplane signals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay (tPLH/tPHL) | Max 5.2 ns (FCT-C grade) - enables reliable operation up to ~190 MHz system clock in registered data paths |
| Output Drive Strength | 32 mA sink/source (commercial) - sufficient to drive 50 Ω transmission lines or multiple TTL loads |
| Operating Voltage | 5 V ±5% - compatible with standard 5 V logic rails and legacy TTL/CMOS mixed-signal systems |
| Temperature Range | –40°C to +85°C - qualified for industrial-grade embedded control and communications equipment |
| Input Compatibility | TTL-level (VIH ≥ 2.0 V, VIL ≤ 0.8 V) - interoperable with 74LS, 74ALS, and other 5 V bipolar logic families |
| Power-Off Disable | IOFF ≤ ±1 µA at VCC = 0 V - prevents back-driving of powered buses during board insertion/removal |
| Toggle Rate | 250 MHz typical - supports high-throughput data latching in burst-mode memory interfaces |
Pinout & Package
Package: 20-Lead (150-mil) QSOP (Q5), body size 7.2 mm × 5.3 mm, 0.635 mm pitch, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 7, 8, 13, 14 | D0–D7 Data Inputs | Asynchronous D-type inputs sampled on LOW-to-HIGH CP transition; TTL-compatible voltage thresholds |
| 5, 6, 9, 10, 11, 12, 15, 16 | O0–O7 Three-State Outputs | Outputs go HIGH-Z when OE = HIGH; driven low/high when OE = LOW and CP edge occurs |
| 17 | CP Clock Input | Buffered edge-triggered clock; requires minimum 5.0 ns pulse width (HIGH/LOW) for reliable sampling |
| 18 | OE Output Enable | Active-low control: OE = LOW enables outputs; OE = HIGH places all O0–O7 in high-impedance state |
| 19 | GND | Ground reference for logic and power; must be low-inductance connection for noise-sensitive operation |
| 20 | VCC | 5 V supply input; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin for stable switching |
Key Features
| Feature | Design Value |
|---|---|
| Edge-rate controlled outputs | Reduces simultaneous switching noise (SSN) by limiting dv/dt - critical for EMI-sensitive bus designs |
| Matched rise/fall times | Ensures symmetrical waveform edges (tR ≈ tF), minimizing duty cycle distortion in clocked data paths |
| FCT-C speed grade | 5.2 ns max propagation delay - meets timing budgets for 100+ MHz synchronous bus interfaces |
| Power-off disable | Enables safe live insertion into powered backplanes without risk of bus contention or latch-up |
| ESD protection | >2000 V HBM - exceeds JEDEC JS-001 Class 2, supporting robust handling in manufacturing environments |
Applications
| Industrial PLC I/O Expansion | Legacy Bus Interface Adapter |
|---|---|
|
Use Scenario: Latching parallel sensor data from 8-channel analog input modules before serial conversion. IC Role / Device Role / Timing Role: Synchronous data register capturing sampled values on rising CP edge; OE controls multiplexed readout to microcontroller. Use Value: 5.2 ns propagation delay ensures setup/hold compliance with 20 MHz sampling clocks; 32 mA drive supports direct connection to 74ACT buffers. |
Use Scenario: Bridging ISA or VME bus data lines to modern FPGA-based controllers with 5 V tolerant I/O. IC Role / Device Role / Timing Role: Bidirectional bus latch providing isolation between legacy peripheral and host-side logic domains. Use Value: TTL-compatible inputs eliminate level-shifter requirements; power-off disable prevents backfeeding during hot-swap of expansion cards. |
| Test Equipment Digital Pattern Generator | Automated Test Fixture Control |
|
Use Scenario: Generating precise 8-bit stimulus patterns synchronized to external trigger signals in ATE systems. IC Role / Device Role / Timing Role: Edge-triggered register holding pattern bits until next CP edge; OE enables dynamic pattern update without glitching outputs. Use Value: 250 MHz toggle rate supports high-speed vector generation; matched tR/tF minimizes jitter in generated waveforms. |
Use Scenario: Controlling solenoid drivers, relay banks, and LED indicators in production-line test jigs. IC Role / Device Role / Timing Role: Output register buffering microcontroller GPIOs to drive higher-current external loads via discrete transistors. Use Value: 32 mA per output eliminates need for additional buffer stages; industrial temp range ensures reliability in factory-floor thermal environments. |
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 |
|---|---|---|---|
| SN74FCT374ATQC | Same pinout and function, but TI-manufactured; 6.5 ns max tPLH (FCT-A speed grade), slightly higher ICC (0.2 mA quiescent) | Lower speed margin may limit use in >150 MHz clock domains; identical industrial temp support and drive strength | Select when sourcing diversity is required and 6.5 ns delay satisfies timing closure |
| 74AC374SCX | Advanced CMOS; 5 V only, 8.5 ns max tPLH, 24 mA drive, no power-off disable, 0°C to +70°C commercial range | Lacks live-insertion capability and extended temperature rating; lower noise immunity due to no edge-rate control | Choose only for cost-sensitive, non-hot-swap, ambient-temperature applications where FCT-specific features are unnecessary |
Compared with SN74FCT374ATQC and 74AC374SCX, the CY74FCT374TQC offers superior speed (5.2 ns vs. 6.5/8.5 ns), guaranteed power-off disable, and full –40°C to +85°C qualification - making it optimal for industrial bus interface and high-reliability test equipment designs.
Availability
CY74FCT374TQC is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy bus interface adapters, and automated test fixture control requiring stable component supply, long-term lifecycle support, and verified industrial temperature performance.
Supply support for CY74FCT374TQC 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
Cypress Semiconductor was a U.S.-based semiconductor company specializing in programmable logic, memory, and high-performance logic ICs before its acquisition by Infineon in 2020.
The CY74FCT374TQC belongs to the FCT-T series of fast CMOS TTL-compatible registers designed for noise-immune, high-speed bus interfacing in industrial and communications systems.
FAQ
What is the maximum clock frequency supported by CY74FCT374TQC?
The CY74FCT374TQC has a 5.2 ns maximum propagation delay (tPLH/tPHL) and 2.0 ns minimum clock pulse width, enabling reliable operation up to approximately 190 MHz in ideal conditions. Real-world maximum frequency depends on setup/hold timing margins, PCB layout, and load capacitance - design validation at target clock rates is recommended using the device's published tS = 2.0 ns and tH = 1.5 ns specifications.
Does CY74FCT374TQC support hot-swap or live insertion?
Yes, CY74FCT374TQC includes a power-off disable feature that limits off-state leakage current (IOFF) to ±1 µA when VCC = 0 V. This allows safe insertion into a powered backplane without causing bus contention or damaging upstream drivers - a key requirement for modular industrial and telecom equipment.
Is CY74FCT374TQC pin-compatible with CY74FCT574TQC?
No, CY74FCT374TQC and CY74FCT574TQC have different pinouts: the FCT374T uses a "flow-in" arrangement (D0–D7 on one side, O0–O7 on the other), while the FCT574T uses flow-through routing (D0–D7 adjacent to corresponding O0–O7). Though functionally identical, they require separate PCB layouts - CY74FCT574TQC simplifies trace routing but is not a drop-in replacement for CY74FCT374TQC.
What is the output drive capability of CY74FCT374TQC?
CY74FCT374TQC provides 32 mA output sink and source current per pin under commercial conditions (VCC = 4.75 V, TA = +25°C). This allows direct driving of multiple TTL loads or 50 Ω transmission lines without external buffers - confirmed by VOL ≤ 0.55 V at IOL = 64 mA and VOH ≥ 2.4 V at IOH = –32 mA in the datasheet.
Can CY74FCT374TQC operate with 3.3 V supply voltage?
No, CY74FCT374TQC is specified only for 5 V ±5% operation (4.75 V to 5.25 V). Its internal circuitry, input thresholds, and output voltage levels are optimized for 5 V TTL compatibility. Applying 3.3 V will result in undefined logic behavior, insufficient noise margin, and failure to meet VOH/VOL specifications - use CY74FCT374CTQCT (3.3 V variant) instead.
CY74FCT374TQC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Type:
- -
- Output Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- -
- Trigger Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Current - Quiescent (Iq):
- -
- Input Capacitance:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
CY74FCT374TQC FAQ
1.How can I place an order for CY74FCT374TQC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT374TQC 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 CY74FCT374TQC reliable?
The price and inventory of CY74FCT374TQC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT374TQC is usually 5 days.
3.What payment methods are accepted for CY74FCT374TQC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT374TQC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT374TQC?
CY74FCT374TQC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT374TQC 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 CY74FCT374TQC?
For technical support, including CY74FCT374TQC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT374TQC requirements.
6.How does Aetrix verify that CY74FCT374TQC is sourced from the original manufacturer or authorized distributors?
All CY74FCT374TQC 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 CY74FCT374TQC meets industry standards.
7.What is the process for return or replacement of CY74FCT374TQC?
All CY74FCT374TQC units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT374TQC, 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 CY74FCT374TQC part is unused and in its original packaging.
Return procedure for CY74FCT374TQC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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