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Texas Instruments CY74FCT374CTQC
- Part No.:
- CY74FCT374CTQC
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
CY74FCT374CTQC.pdf
- Description:
- BUS DRIVER, FCT SERIES
- Quantity:
- Payment:
- Shipping:
Inventory:5,059
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Product details
Overview
CY74FCT374CTQC 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 (tPLH/tPHL), supports 250 MHz typical toggle rate, and features power-off disable for live insertion in bus-oriented systems.
For engineers reviewing the CY74FCT374CTQC datasheet, CY74FCT374CTQC pinout, CY74FCT374CTQC application, or CY74FCT374CTQC equivalent, key selection criteria include guaranteed 5.2 ns commercial-speed timing, 32 mA output drive capability, −40°C to +85°C extended temperature range, and QSOP-20 package compatibility with high-density PCB layouts.
Technical Context
The CY74FCT374CTQC 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 interfaces.
It is fully TTL-compatible on both inputs and outputs, supports live insertion via power-off disable (IOFF ≤ ±1 µA at VCC = 0 V), and maintains high-impedance outputs when OE is HIGH-enabling bidirectional data bus management without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay (tPLH/tPHL) | Max 5.2 ns at VCC = 5 V, TA = −40°C to +85°C - enables reliable 192 MHz system clock operation with setup/hold margin. |
| Output Drive (IOH/IOL) | −32 mA / +64 mA - drives standard TTL loads directly without buffers in backplane or memory interface designs. |
| Operating Voltage | 5 V ±5% - compatible with legacy 5 V logic rails and mixed-voltage board architectures. |
| Temperature Range | −40°C to +85°C - qualified for industrial-grade embedded control and communications equipment. |
| Input Hysteresis (VH) | 0.2 V - improves noise immunity on noisy control lines such as reset or enable signals. |
| Power-Off Disable (IOFF) | ±1 µA at VCC = 0 V - prevents back-driving of powered buses during hot-swap or module replacement. |
| Toggle Rate | 250 MHz typical - supports high-throughput data latching in test equipment and digital instrumentation. |
Pinout & Package
Package: 20-Lead (150-mil) QSOP (Q5), body size 7.5 mm × 4.4 mm, 0.65 mm lead pitch, gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | D0–D7 Data Inputs | Asynchronous D-type inputs sampled on rising CP edge; TTL-compatible voltage thresholds (VIH = 2.0 V, VIL = 0.8 V). |
| 9 | GND | Ground reference for all I/O and internal logic; must be low-impedance connection to minimize ground bounce. |
| 10 | CP | Buffered clock input; edge-triggered on LOW-to-HIGH transition; 5.0 ns min pulse width required. |
| 11 | OE | Active-low output enable; controls all eight outputs simultaneously; high-impedance state when HIGH. |
| 12, 13, 14, 15, 16, 17, 18, 19 | O0–O7 Three-State Outputs | Registered outputs reflecting Dn state after CP edge; driven to high-Z when OE = HIGH; sink/source capable. |
| 20 | VCC | Positive supply; decoupling capacitor (0.1 µF ceramic) required within 10 mm of pin for stable operation. |
Key Features
| Feature | Design Value |
|---|---|
| Edge-rate controlled outputs | Reduces simultaneous switching noise (SSN) by limiting dV/dt, critical for EMI-sensitive instrumentation and telecom line cards. |
| FCT-C speed grade (5.2 ns) | Meets timing closure for 192 MHz synchronous bus clocks with 2 ns setup/hold margin under worst-case conditions. |
| Power-off disable (IOFF ≤ ±1 µA) | Enables safe hot-plug operation in modular backplanes without risk of bus contention or latch-up. |
| TTL-compatible I/O levels | Eliminates level-shifting components when interfacing with legacy 74LS/74ALS peripherals or microcontrollers. |
| Matched rise/fall times | Ensures symmetrical waveform edges, minimizing duty-cycle distortion in clock distribution and data capture paths. |
Applications
| Industrial PLC I/O Modules | Test Equipment Digital Pattern Generators |
|---|---|
|
Use Scenario: Latching parallel sensor data from analog-to-digital converters before serial transmission to a controller. IC Role / Device Role / Timing Role: Synchronous 8-bit data register capturing ADC output on rising clock edge; OE used for multiplexed bus access. Use Value: 5.2 ns propagation delay ensures sub-20 ns sampling window alignment across 8 channels, supporting 50 MSPS aggregate throughput. |
Use Scenario: Holding stimulus patterns for automated test fixtures driving DUTs with precise timing windows. IC Role / Device Role / Timing Role: Edge-triggered storage element synchronizing pattern bits to system clock; three-state outputs isolate unused channels. Use Value: 250 MHz toggle rate and 2 ns setup/hold allow generation of >100 MHz deterministic test vectors with minimal skew. |
| Communications Backplane Interface | Legacy Microcontroller Bus Expansion |
|
Use Scenario: Buffering control/status registers between line cards and central switch fabric in TDM-based telecom chassis. IC Role / Device Role / Timing Role: Bidirectional bus register managing shared control bus; OE enables arbitration between multiple masters. Use Value: Power-off disable prevents back-driving of live backplane during card insertion, meeting NEBS GR-63 compliance requirements. |
Use Scenario: Expanding parallel I/O ports on 8051 or Z80-based embedded controllers where native GPIO is insufficient. IC Role / Device Role / Timing Role: Synchronous latch extending microcontroller data/address bus; CP tied to system clock or strobe signal. Use Value: TTL-compatible inputs eliminate external level shifters, reducing BOM cost and board area in cost-sensitive industrial controllers. |
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 |
|---|---|---|---|
| SN74FCT374CQ | Same FCT-C speed (5.2 ns), identical pinout, but manufactured by Texas Instruments; VOH spec slightly lower (2.4 V min vs 2.0 V min at IOH = –32 mA). | Valid for drop-in replacement in existing Cypress-designed boards; TI's version has tighter VOH tolerance but same thermal profile. | Select SN74FCT374CQ only if TI qualification or long-term supply continuity is prioritized over Cypress-specific reliability data. |
| 74AC374PC | Higher speed (3.5 ns max), but AC-family CMOS process lacks power-off disable (IOFF not specified); no guaranteed live-insertion support. | Not suitable for hot-swap backplanes; requires external isolation circuitry in modular systems where CY74FCT374CTQC is deployed. | Choose 74AC374PC only for fixed-installation, non-hot-swap applications demanding <4 ns timing and lower static power. |
Compared with SN74FCT374CQ and 74AC374PC, the CY74FCT374CTQC uniquely combines guaranteed 5.2 ns timing, power-off disable, and −40°C to +85°C qualification-making it the sole option for industrial hot-swap bus interfaces requiring both speed and robustness.
Availability
CY74FCT374CTQC is available at Aetrix Electronics and suitable for industrial PLC I/O modules, test equipment digital pattern generators, and communications backplane interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CY74FCT374CTQC 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 (now part of Infineon Technologies) is a U.S.-based semiconductor company specializing in programmable systems-on-chip, memory, and high-performance logic solutions for industrial, automotive, and communications markets.
The CY74FCT374CTQC belongs to Cypress's FCT logic family, engineered for high-speed, low-noise, TTL-compatible bus interface applications in harsh industrial environments where reliability and timing precision are critical.
FAQ
What is the maximum clock frequency supported by the CY74FCT374CTQC?
The CY74FCT374CTQC supports a maximum reliable clock frequency of 192 MHz, derived from its 5.2 ns maximum propagation delay (tPLH/tPHL) and 2 ns minimum setup/hold time. At this rate, the CY74FCT374CTQC maintains timing margin for stable data capture in synchronous bus systems operating at 5 V.
Does the CY74FCT374CTQC support hot-swap or live insertion?
Yes, the CY74FCT374CTQC supports live insertion via its power-off disable feature: when VCC = 0 V, off-state leakage current (IOFF) is limited to ±1 µA, preventing back-driving of powered buses. This behavior is explicitly tested and guaranteed per the datasheet, making the CY74FCT374CTQC suitable for modular backplane applications.
Is the CY74FCT374CTQC pin-compatible with the CY74FCT574CTQC?
No, the CY74FCT374CTQC and CY74FCT574CTQC are not pin-compatible. While functionally identical, the CY74FCT574CTQC uses a flow-through pinout (D0–D7 on one side, O0–O7 on the opposite) to simplify PCB routing, whereas the CY74FCT374CTQC uses a folded layout (D0–D7 and O0–O7 interleaved). Board redesign is required for substitution.
What is the output drive strength of the CY74FCT374CTQC at 5 V?
At VCC = 5 V, the CY74FCT374CTQC provides −32 mA output source current (IOH) and +64 mA output sink current (IOL) per pin under commercial conditions. This drive strength allows direct interfacing with standard TTL loads without external buffers, as confirmed in the Electrical Characteristics table of the CY74FCT374CTQC datasheet.
Can the CY74FCT374CTQC operate outside the 5 V ±5% supply range?
No, the CY74FCT374CTQC is specified only for operation at 5 V ±5% (4.75 V to 5.25 V) across its full −40°C to +85°C temperature range. Exceeding this range violates Absolute Maximum Ratings (supply voltage limit: −0.5 V to +7.0 V), risks parametric failure, and voids guaranteed timing and drive performance-per the CY74FCT374CTQC datasheet Section "Operating Range".
CY74FCT374CTQC 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:
- -
CY74FCT374CTQC FAQ
1.How can I place an order for CY74FCT374CTQC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT374CTQC 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 CY74FCT374CTQC reliable?
The price and inventory of CY74FCT374CTQC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT374CTQC is usually 5 days.
3.What payment methods are accepted for CY74FCT374CTQC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT374CTQC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT374CTQC?
CY74FCT374CTQC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT374CTQC 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 CY74FCT374CTQC?
For technical support, including CY74FCT374CTQC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT374CTQC requirements.
6.How does Aetrix verify that CY74FCT374CTQC is sourced from the original manufacturer or authorized distributors?
All CY74FCT374CTQC 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 CY74FCT374CTQC meets industry standards.
7.What is the process for return or replacement of CY74FCT374CTQC?
All CY74FCT374CTQC units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT374CTQC, 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 CY74FCT374CTQC part is unused and in its original packaging.
Return procedure for CY74FCT374CTQC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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