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Texas Instruments CY74FCT374TQCT
- Part No.:
- CY74FCT374TQCT
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
CY74FCT374TQCT.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,459
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Product details
Overview
CY74FCT374TQCT 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 a buffered clock (CP), common output-enable (OE), 64-mA sink / 32-mA source drive strength, 10 ns max propagation delay (tPLH/tPHL), and Ioff support for partial-power-down mode. It operates across –40°C to +85°C and is used in data latching and bus buffering in industrial control backplanes.
For engineers reviewing the CY74FCT374TQCT datasheet, CY74FCT374TQCT pinout, CY74FCT374TQCT application, or CY74FCT374TQCT equivalent, key selection criteria include 3-state bus drive capability, TTL-compatible input thresholds, Ioff-enabled power-down isolation, and QSOP-20 packaging for space-constrained PCB layouts.
Technical Context
The CY74FCT374TQCT implements eight independent D-type flip-flops synchronized on the low-to-high transition of CP, with all outputs gated by a shared OE signal. Its edge-rate control circuitry ensures matched rise/fall times and reduced switching noise-critical for clean signal integrity in synchronous bus systems.
It supports full TTL-level compatibility (VIH = 2 V min, VIL = 0.8 V max) and includes robust ESD protection (2000-V HBM, 200-V MM, 1000-V CDM). The Ioff feature disables outputs when VCC = 0 V, preventing backflow current during partial power-down sequences in mixed-supply systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | 8-bit positive-edge-triggered D-type register with 3-state outputs |
| Propagation Delay (tPLH/tPHL) | Max 10 ns at VCC = 5 V - enables reliable operation up to 100 MHz system clock rates |
| Output Drive Strength | 64 mA sink / 32 mA source - sufficient to drive heavy capacitive buses without external buffers |
| Supply Voltage Range | 4.75 V to 5.25 V - tightly regulated 5-V operation with ±2.5% tolerance |
| Ioff Current | ±1 µA at VCC = 0 V - ensures safe isolation during hot-swap or partial-power-down scenarios |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and control applications |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - exceeds JEDEC JESD22-A114/A115/C101 requirements |
Pinout & Package
Package: SSOP-20 (DBQ), 0.209" body width, 0.65 mm pitch, RoHS-compliant NiPdAu lead finish, MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Output Enable | Active-low global control: drives all 8 outputs to high-Z when high; no effect on internal flip-flop state |
| 2–9 (D0–D7) | Data Inputs | Independent asynchronous inputs sampled on CP rising edge; meet 2 ns setup / 1.5 ns hold timing |
| 10 (GND) | Ground Reference | Primary digital ground return path; decoupling capacitor must be placed adjacent to this pin |
| 11 (VCC) | Power Supply | +5 V supply rail; requires local 0.1 µF ceramic bypass capacitor between Pins 10 and 11 |
| 12–19 (O0–O7) | 3-State Outputs | Registered outputs with 64-mA sink capability; enter high-impedance state within 5 ns of OE assertion |
| 20 (CP) | Clock Input | Buffered positive-edge-triggered clock; minimum pulse width 7 ns high/low; TTL-compatible threshold |
Key Features
| Feature | Design Value |
|---|---|
| Edge-Rate Controlled Outputs | Matched rise/fall times reduce simultaneous switching noise (SSN) and improve signal integrity on shared buses |
| Ioff Partial-Power-Down Support | Enables safe insertion/removal in live backplanes by disabling outputs when VCC = 0 V, preventing backfeed damage |
| TTL-Compatible Interface | Accepts standard TTL VIH (≥2 V) and VIL (≤0.8 V); eliminates level-shifting in legacy 5-V systems |
| High-Noise Immunity | Input hysteresis (Vhys = 0.2 V) rejects transient noise on CP and OE lines in electrically noisy environments |
| Low Dynamic Power | ICC dynamic current ≤3.9 mA at 10 MHz clock with all 8 bits toggling - reduces thermal load in dense logic arrays |
Applications
| Industrial PLC Backplane | Automotive Body Control Module |
|---|---|
|
Use Scenario: Latching sensor status and actuator commands across a multi-slot 5-V backplane with shared data bus. IC Role / Device Role / Timing Role: Synchronous data register holding parallel I/O states; CP aligned to system master clock edge. Use Value: 64-mA drive strength maintains signal integrity over 15-cm traces; Ioff prevents bus contention during hot-swap of I/O modules. |
Use Scenario: Isolating microcontroller GPIOs from high-current door lock solenoids and lighting drivers. IC Role / Device Role / Timing Role: Bus-oriented output latch buffering MCU outputs before driving discrete power stages. Use Value: 3-state outputs enable time-multiplexed control of multiple loads; TTL compatibility avoids level translators in legacy BCM designs. |
| Test Equipment Digital I/O Card | Legacy Communication Interface Adapter |
|
Use Scenario: Capturing parallel test vectors from FPGA-based pattern generators into deterministic capture registers. IC Role / Device Role / Timing Role: Edge-triggered D-register sampling data on precise clock edges for repeatable timing analysis. Use Value: 2 ns setup/1.5 ns hold time allows synchronization with sub-500 ps jitter clocks; low propagation skew (<1 ns) preserves vector alignment. |
Use Scenario: Adapting ISA-bus signals between modern SoC peripherals and legacy PC/104 expansion cards. IC Role / Device Role / Timing Role: Bidirectional bus buffer with direction controlled via OE, enabling read/write handshaking. Use Value: 10 ns max tPLH/tPHL meets ISA timing budgets; 3-state outputs prevent bus conflicts during DMA cycles. |
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 |
|---|---|---|---|
| SN74FCT374ATQCT | Same 8-bit D-register function but rated for 6.5 ns max propagation delay; lower drive (32-mA sink / 12-mA source). | Suitable for lower-speed, lower-power bus interfaces where 100-MHz timing margin is not required. | Select SN74FCT374ATQCT only if system clock < 80 MHz and bus loading ≤40 pF; not drop-in for CY74FCT374TQCT's higher drive needs. |
| 74ACT374SCX | ACT-family variant with 5-V CMOS logic; 8.5 ns max tPLH, 24-mA drive, no Ioff support. | Lacks Ioff and has weaker noise immunity; requires strict VCC sequencing in partial-power-down systems. | Choose 74ACT374SCX only in fully powered, noise-controlled environments where Ioff is unnecessary and tighter timing is critical. |
Compared with SN74FCT374ATQCT and 74ACT374SCX, the CY74FCT374TQCT delivers superior bus drive, guaranteed Ioff behavior, and stronger ESD resilience-making it the preferred choice for industrial backplanes and automotive modules requiring robust hot-swap operation.
Availability
CY74FCT374TQCT is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, and test equipment digital I/O cards requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CY74FCT374TQCT 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 industrial and automotive ICs.
The CY74FCT374TQCT belongs to TI's FCT logic family-designed specifically for 5-V TTL-compatible bus interfacing with enhanced noise immunity, power-down safety, and industrial temperature operation.
FAQ
What is the maximum clock frequency supported by the CY74FCT374TQCT?
The CY74FCT374TQCT supports reliable operation up to 100 MHz, derived from its 10 ns maximum propagation delay (tPLH/tPHL) and 7 ns minimum clock pulse width. At 10 MHz, total supply current is ≤3.9 mA with all 8 bits switching-confirming stable high-speed performance under typical bus loading conditions.
Does the CY74FCT374TQCT support partial power-down, and how does it behave when VCC = 0 V?
Yes, the CY74FCT374TQCT supports partial power-down via its Ioff circuitry. When VCC = 0 V, the outputs are disabled with leakage current limited to ±1 µA-even if valid input or output voltages are present-preventing damaging backflow current in hot-swap or mixed-supply systems.
What package type and footprint does the CY74FCT374TQCT use?
The CY74FCT374TQCT uses a 20-pin SSOP (Shrink Small Outline Package) with drawing DBQ, 0.65 mm lead pitch, and 0.209" body width. It is RoHS-compliant with NiPdAu lead finish and MSL Level-2 moisture sensitivity rating for standard reflow assembly.
How does the CY74FCT374TQCT handle noise on the clock and output-enable lines?
The CY74FCT374TQCT incorporates 0.2 V of input hysteresis (Vhys) on all control inputs including CP and OE, rejecting fast transients and improving noise immunity in electrically noisy industrial environments. Combined with edge-rate controlled outputs, this minimizes simultaneous switching noise on shared buses.
Is the CY74FCT374TQCT pin-compatible with other FCT-series octal registers?
Yes, the CY74FCT374TQCT is functionally and pinout-compatible with CY74FCT374ATQCT and CY74FCT374CTQCT within the same SSOP-20 package. Differences lie in speed grade (10 ns vs. 6.5 ns vs. 5.2 ns) and output drive strength-not pin assignment or logic behavior.
CY74FCT374TQCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 20-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-SSOP
CY74FCT374TQCT FAQ
1.How can I place an order for CY74FCT374TQCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT374TQCT 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 CY74FCT374TQCT reliable?
The price and inventory of CY74FCT374TQCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT374TQCT is usually 5 days.
3.What payment methods are accepted for CY74FCT374TQCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT374TQCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT374TQCT?
CY74FCT374TQCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT374TQCT 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 CY74FCT374TQCT?
For technical support, including CY74FCT374TQCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT374TQCT requirements.
6.How does Aetrix verify that CY74FCT374TQCT is sourced from the original manufacturer or authorized distributors?
All CY74FCT374TQCT 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 CY74FCT374TQCT meets industry standards.
7.What is the process for return or replacement of CY74FCT374TQCT?
All CY74FCT374TQCT units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT374TQCT, 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 CY74FCT374TQCT part is unused and in its original packaging.
Return procedure for CY74FCT374TQCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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