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Texas Instruments CY74FCT374CTQCT
- Part No.:
- CY74FCT374CTQCT
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
CY74FCT374CTQCT.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,619
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Product details
Overview
CY74FCT374CTQCT 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 buffered clock (CP), common output-enable (OE), ±32 mA output drive, 5.2 ns maximum propagation delay, and Ioff support for partial-power-down operation in mixed-voltage environments.
For engineers reviewing the CY74FCT374CTQCT datasheet, CY74FCT374CTQCT pinout, CY74FCT374CTQCT application, or CY74FCT374CTQCT equivalent, key selection criteria include 3-state bus interface capability, TTL-compatible input thresholds, 5-V supply operation with 250-MHz typical switching rate, and QSOP-20 packaging for high-density PCB layouts.
Technical Context
The CY74FCT374CTQCT implements eight independent D-type latches synchronized to the low-to-high transition of CP, with all outputs controlled by a shared OE signal. Its FCT-family architecture delivers reduced VOH (~3.3 V) and edge-rate control circuitry to minimize switching noise while maintaining full TTL logic level compatibility.
Ioff circuitry actively disables outputs during power-down, preventing backflow current when VCC = 0 V, and matched rise/fall times ensure clean signal integrity in high-speed data capture and buffering applications across industrial and embedded control systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | FCT (Fast CMOS TTL-compatible), ensuring drop-in replacement for 74F/74LS in legacy 5-V systems |
| Propagation Delay (tPLH/tPHL) | 5.2 ns max at VCC = 5 V - enables reliable 192-MHz operation (1/5.2 ns) in synchronous bus interfaces |
| Output Drive | ±32 mA (IOH/IOL) - supports direct driving of multiple TTL loads without external buffers |
| Supply Voltage Range | 4.75 V to 5.25 V - tight regulation tolerance ensures stable timing margins in noisy 5-V rails |
| 3-State Enable Time (tPZH/tPLZ) | 5.5 ns max - allows rapid bus arbitration and multi-master contention resolution |
| Ioff Current | ±1 µA at VCC = 0 V - guarantees safe hot-insertion and partial-power-down in modular backplane systems |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - meets industrial-grade robustness requirements per JESD22 |
Pinout & Package
Package: QSOP-20 (DBQ), 0.154" body width, 0.65 mm lead pitch, RoHS-compliant NiPdAu finish, MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 18, 19 | Data Inputs (D0–D7) / Outputs (O0–O7) | Eight bidirectional I/O channels; D inputs sampled on CP↑, O outputs enabled/disabled by OE |
| 9 | GND | Power ground reference for all internal logic and output drivers |
| 10 | VCC | 5-V supply pin; decoupling capacitor placement critical for noise suppression |
| 11 | OE | Active-low 3-state enable; high = high-impedance outputs, low = registered data presented |
| 12 | CP | Buffered clock input; edge-triggered on low-to-high transition only |
| 13–20 | O0–O7 | 3-state outputs; electrically isolated when OE = high, driven to logic state when OE = low |
Key Features
| Feature | Design Value |
|---|---|
| Edge-Rate Controlled Outputs | Slower edge transitions reduce EMI and crosstalk in dense PCB routing without sacrificing speed |
| Ioff Partial-Power-Down Support | Enables safe integration into hot-swap backplanes and multi-rail systems where VCC may be sequenced |
| Matched Rise/Fall Times | Ensures symmetrical waveform edges for minimized duty-cycle distortion in clock distribution paths |
| TTL-Compatible Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - interoperates seamlessly with legacy 74LS/74ALS logic families |
| 250-MHz Typical Switching Rate | Validated under load conditions; supports high-throughput data acquisition and real-time control loops |
Applications
| Industrial PLC I/O Expansion | Automotive Body Control Module |
|---|---|
Use Scenario: Latching sensor inputs and driving actuator outputs across a CAN-connected distributed I/O rack. IC Role / Device Role / Timing Role: CY74FCT374CTQCT acts as an 8-bit parallel input/output register synchronized to a system clock, buffering signals between microcontroller GPIO and external field devices. Use Value: 3-state outputs allow shared bus access among multiple I/O modules; Ioff prevents backfeed during module hot-swap maintenance. | Use Scenario: Interfacing door lock actuators, window lift motors, and mirror controls to a central BCM microcontroller. IC Role / Device Role / Timing Role: CY74FCT374CTQCT provides galvanically isolated, noise-immune parallel output staging for safety-critical actuation signals. Use Value: Edge-rate control minimizes conducted emissions in automotive EMC testing; ±32 mA drive eliminates need for discrete driver transistors. |
| Test Equipment Digital Pattern Generator | Legacy System Bus Interface Adapter |
Use Scenario: Generating precise, synchronized digital stimulus waveforms for IC functional validation in ATE systems. IC Role / Device Role / Timing Role: CY74FCT374CTQCT serves as a high-speed pattern latch, capturing test vectors from FPGA logic and presenting them simultaneously to DUT pins. Use Value: 5.2 ns propagation delay ensures sub-200 MHz timing accuracy; matched tPLH/tPHL preserves waveform symmetry for jitter-sensitive measurements. | Use Scenario: Bridging modern microcontrollers to legacy ISA or VMEbus peripherals requiring 74F374-compatible timing and drive. IC Role / Device Role / Timing Role: CY74FCT374CTQCT functions as a drop-in replacement for obsolete 74F374 in bus transceiver and address latch circuits. Use Value: Pinout-identical to industry-standard 74F374; identical setup/hold (2 ns/1.5 ns) and pulse width (5 ns) requirements simplify redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit 3-state register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74F374N | Same pinout, but higher ICC (20 mA vs. 0.2 mA), no Ioff, slower tpd (12 ns), non-RoHS PDIP only | Limited to legacy through-hole designs; unsuitable for partial-power-down or high-density surface-mount layouts | Select SN74F374N only for direct 74F-series replacement in existing through-hole boards with no power sequencing constraints. |
| 74ACT374SCX | Higher VOH (4.4 V), 50 mA drive, 10 ns tpd, SOIC-20 only; no Ioff or edge-rate control | Better for 5-V systems needing stronger drive, but lacks bus isolation and hot-swap safety features | Choose 74ACT374SCX when interfacing to high-capacitance buses where speed margin outweighs EMI and power-down safety needs. |
Compared with SN74F374N and 74ACT374SCX, CY74FCT374CTQCT uniquely balances low-power operation, industrial-grade ESD, Ioff-enabled system safety, and QSOP packaging-making it optimal for new designs requiring reliability, density, and mixed-rail compatibility.
Availability
CY74FCT374CTQCT is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and test equipment applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant surface-mount packaging.
Supply support for CY74FCT374CTQCT 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 over 50 years of innovation in high-reliability digital interface components.
The CY74FCT374CTQCT belongs to TI's FCT logic family, engineered specifically for 5-V bus interface applications demanding low noise, high drive strength, and robust partial-power-down behavior in mission-critical systems.
FAQ
What is the maximum clock frequency supported by CY74FCT374CTQCT?
CY74FCT374CTQCT supports a typical switching rate of 250 MHz, validated under standard load conditions (CL = 50 pF). Its 5.2 ns maximum propagation delay (tPLH/tPHL) and 5 ns minimum clock pulse width (tw) enable reliable operation up to 192 MHz in worst-case timing analysis, making it suitable for high-speed data capture and synchronous bus applications.
Does CY74FCT374CTQCT support partial-power-down operation?
Yes, CY74FCT374CTQCT includes Ioff circuitry that disables outputs when VCC = 0 V, limiting Ioff current to ±1 µA. This feature prevents damaging current backflow during hot-swap or power sequencing events, enabling safe use in modular backplanes and multi-rail industrial systems where power domains are independently controlled.
What package type is used for CY74FCT374CTQCT?
CY74FCT374CTQCT uses a QSOP-20 (DBQ) package: 20-pin, 0.154" body width, 0.65 mm lead pitch, RoHS-compliant NiPdAu surface finish, and moisture sensitivity level (MSL) rating of Level-2-260°C-1 year - optimized for automated SMT assembly and high-density PCB layouts.
How does CY74FCT374CTQCT differ from the CY74FCT374ATQCT variant?
CY74FCT374CTQCT has a 5.2 ns maximum propagation delay and operates across –40°C to +85°C, while CY74FCT374ATQCT offers 6.5 ns tpd and identical temperature range. Both share identical pinout, Ioff, and 3-state functionality, but the 'C' suffix denotes faster timing performance for applications demanding tighter setup/hold margins.
Is CY74FCT374CTQCT compatible with TTL-level inputs and outputs?
Yes, CY74FCT374CTQCT is fully compatible with TTL logic levels: VIH = 2.0 V min and VIL = 0.8 V max meet standard TTL thresholds, and its VOH ≈ 3.3 V (typical) and VOL ≤ 0.55 V ensure reliable interfacing with 74LS, 74ALS, and other legacy TTL families without level-shifting circuitry.
CY74FCT374CTQCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 20-SSOP (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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:
- 5.2ns @ 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
CY74FCT374CTQCT FAQ
1.How can I place an order for CY74FCT374CTQCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT374CTQCT 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 CY74FCT374CTQCT reliable?
The price and inventory of CY74FCT374CTQCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT374CTQCT is usually 5 days.
3.What payment methods are accepted for CY74FCT374CTQCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT374CTQCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT374CTQCT?
CY74FCT374CTQCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT374CTQCT 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 CY74FCT374CTQCT?
For technical support, including CY74FCT374CTQCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT374CTQCT requirements.
6.How does Aetrix verify that CY74FCT374CTQCT is sourced from the original manufacturer or authorized distributors?
All CY74FCT374CTQCT 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 CY74FCT374CTQCT meets industry standards.
7.What is the process for return or replacement of CY74FCT374CTQCT?
All CY74FCT374CTQCT units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT374CTQCT, 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 CY74FCT374CTQCT part is unused and in its original packaging.
Return procedure for CY74FCT374CTQCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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