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Texas Instruments CY74FCT374ATPC
- Part No.:
- CY74FCT374ATPC
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
CY74FCT374ATPC.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:776
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Product details
Overview
CY74FCT374ATPC from Texas Instruments is an 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, 6.5 ns max propagation delay, and Ioff support for partial-power-down operation in mixed-voltage environments.
For engineers reviewing the CY74FCT374ATPC datasheet, CY74FCT374ATPC pinout, CY74FCT374ATPC application, or CY74FCT374ATPC equivalent, this device serves as a high-speed, TTL-compatible octal latch for data buffering, address/data bus isolation, and synchronous storage in industrial control, test equipment, and legacy computing interfaces.
Technical Context
The CY74FCT374ATPC implements eight independent D-type flip-flops sharing a single positive-edge-triggered clock (CP) and a common active-low output-enable (OE). Its Ioff circuitry disables outputs when VCC = 0 V, preventing backflow current during power sequencing. Edge-rate control minimizes switching noise while maintaining matched rise/fall times.
It operates over –40°C to +85°C with 4.75–5.25 V supply, fully compatible with TTL input thresholds (VIH = 2 V, VIL = 0.8 V) and delivering VOH ≥ 2.4 V at –32 mA and VOL ≤ 0.55 V at 64 mA sink. The device supports 250-MHz typical switching rate under defined load conditions.
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) | ≤ 6.5 ns at VCC = 5 V, CL = 50 pF - enables 150+ MHz bus operation |
| Output Drive | ±32 mA (source/sink) - drives heavy capacitive loads and multiple TTL inputs |
| Ioff Support | Active at VCC = 0 V - allows safe hot-insertion and partial power-down in backplane systems |
| Supply Voltage Range | 4.75–5.25 V - tight tolerance ensures stable timing across line regulation |
| Input Compatibility | Fully TTL-compatible VIH/VIL - interoperates with legacy 74LS/74ALS logic without level shifters |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - meets industrial handling requirements |
Pinout & Package
Package: 20-pin plastic dual in-line package (PDIP-N), 0.300-inch wide body, through-hole mount, RoHS-compliant NiPdAu lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Output Enable (active low) | Controls all 8 outputs simultaneously; high = high-impedance state, independent of clock or data |
| 2–9 (D0–D7) | Data inputs | Individual asynchronous D inputs for each flip-flop; sampled on CP rising edge |
| 10 (GND) | Ground reference | Primary signal return path; must be low-inductance connection for noise immunity |
| 11 (VCC) | Power supply | +5 V supply pin; requires local 0.1 µF ceramic decoupling adjacent to pin |
| 12–19 (O0–O7) | 3-state outputs | Registered outputs enabled by OE; high-impedance when OE = high |
| 20 (CP) | Clock input | Buffered positive-edge-triggered clock; synchronizes all 8 flip-flops to same edge |
Key Features
| Feature | Design Value |
|---|---|
| Edge-rate controlled outputs | Reduces simultaneous switching noise (SSN) by limiting di/dt without sacrificing speed |
| Matched tPLH/tPHL | Ensures symmetrical timing margins in bidirectional bus applications |
| Ioff protection | Prevents destructive current flow during power sequencing or board hot-swap |
| TTL-compatible interface | Eliminates need for external level translators when interfacing with 74LS/74ALS families |
| 250-MHz typical switching | Supports high-throughput data capture in test instrumentation and protocol analyzers |
Applications
| Industrial PLC Backplane Interface | Legacy Computer Address Latching |
|---|---|
Use Scenario: Isolating CPU address bus from modular I/O expansion slots in programmable logic controllers. IC Role / Device Role / Timing Role: Synchronizes and buffers 8-bit address segments with precise setup/hold timing (tsu = 2 ns, th = 1.5 ns). Use Value: Enables deterministic bus arbitration and prevents metastability during slot insertion/removal via Ioff-enabled power sequencing. |
Use Scenario: Capturing and holding 8-bit memory-mapped I/O addresses in vintage x86-based embedded systems. IC Role / Device Role / Timing Role: Acts as address latch between ISA bus and peripheral decode logic using CP edge-triggering. Use Value: Maintains full TTL compatibility and eliminates external pull-ups or level shifters required by CMOS alternatives. |
| Automated Test Equipment (ATE) Data Capture | Digital Signal Acquisition Buffer |
Use Scenario: Sampling parallel sensor data streams at up to 150 MHz in boundary-scan test fixtures. IC Role / Device Role / Timing Role: Registers incoming 8-bit parallel data synchronized to system clock edge with sub-7 ns propagation. Use Value: Delivers jitter-free sampling window and robust noise immunity via edge-rate control and matched timing. |
Use Scenario: Temporarily storing ADC output words before serial conversion in multi-channel DAQ modules. IC Role / Device Role / Timing Role: Provides temporary hold storage with 3-state outputs enabling shared data bus access. Use Value: Allows seamless handoff between parallel acquisition and serial transmission without bus contention. |
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 |
|---|---|---|---|
| SN74FCT374ATPC | Same pinout, identical timing and drive specs; TI's commercial-grade rebranding of CY74FCT374ATPC | No functional difference; used interchangeably in non-military designs | Select SN74FCT374ATPC for standard commercial sourcing where CY prefix is not required |
| 74ACT374PC | Higher VOH (≥3.3 V), lower IOL (24 mA), no Ioff support, 7 ns max tPD | Lacks partial-power-down capability; unsuitable for hot-swap or mixed-supply systems | Choose only if higher output voltage margin is critical and Ioff is unnecessary |
Compared with SN74FCT374ATPC, the CY74FCT374ATPC offers identical electrical behavior but may differ in traceability and qualification history; versus 74ACT374PC, it provides superior bus-driving strength, guaranteed Ioff, and tighter timing-making it preferred for industrial backplanes and ATE.
Availability
CY74FCT374ATPC is available at Aetrix Electronics and suitable for industrial PLC backplane interfaces, legacy computer address latching, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CY74FCT374ATPC 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 logic families.
The CY74FCT374ATPC belongs to TI's FCT (Fast CMOS TTL-compatible) logic series, engineered for noise-immune, high-drive bus interfacing in industrial, military, and telecom infrastructure where robustness and timing precision are critical.
FAQ
What is the maximum clock frequency supported by the CY74FCT374ATPC?
The CY74FCT374ATPC supports a typical switching rate of 250 MHz under defined load conditions (CL = 50 pF). Its 6.5 ns maximum propagation delay and 2 ns minimum setup/hold times enable reliable operation at sustained clock frequencies up to 150 MHz in real-world PCB layouts with controlled trace impedance and proper decoupling.
Does the CY74FCT374ATPC support partial power-down operation?
Yes, the CY74FCT374ATPC includes Ioff circuitry that actively disables outputs when VCC = 0 V, limiting leakage current to ±1 µA. This feature allows safe insertion into live backplanes and prevents damaging current backflow during power sequencing-critical for industrial hot-swap applications.
What is the output drive capability of the CY74FCT374ATPC?
The CY74FCT374ATPC delivers ±32 mA output current per pin: –32 mA source (IOH) at VOH ≥ 2.4 V and 64 mA sink (IOL) at VOL ≤ 0.55 V. This drive strength supports direct interfacing with multiple TTL loads or driving moderate PCB trace capacitance without external buffers.
Is the CY74FCT374ATPC pin-compatible with older 74LS374 devices?
The CY74FCT374ATPC shares the same 20-pin PDIP footprint and functional pinout as the 74LS374, including identical D0–D7, O0–O7, CP, OE, VCC, and GND assignments. However, it requires a 5 V ±5% supply (not 5 V ±10%) and offers faster timing, higher drive, and Ioff-making it a drop-in upgrade with improved performance.
What packaging and compliance information applies to the CY74FCT374ATPC?
The CY74FCT374ATPC is supplied in a RoHS-compliant 20-pin PDIP-N package with NiPdAu lead finish, rated for –40°C to +85°C operation. It meets JEDEC JESD22-A114 (2000-V HBM), JESD22-A115 (200-V MM), and JESD22-C101 (1000-V CDM) ESD standards and is qualified for industrial-grade reliability per TI's production data specifications.
CY74FCT374ATPC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- 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:
- 6.5ns @ 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:
- Through Hole
- Supplier Device Package:
- 20-PDIP
CY74FCT374ATPC FAQ
1.How can I place an order for CY74FCT374ATPC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT374ATPC 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 CY74FCT374ATPC reliable?
The price and inventory of CY74FCT374ATPC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT374ATPC is usually 5 days.
3.What payment methods are accepted for CY74FCT374ATPC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT374ATPC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT374ATPC?
CY74FCT374ATPC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT374ATPC 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 CY74FCT374ATPC?
For technical support, including CY74FCT374ATPC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT374ATPC requirements.
6.How does Aetrix verify that CY74FCT374ATPC is sourced from the original manufacturer or authorized distributors?
All CY74FCT374ATPC 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 CY74FCT374ATPC meets industry standards.
7.What is the process for return or replacement of CY74FCT374ATPC?
All CY74FCT374ATPC units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT374ATPC, 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 CY74FCT374ATPC part is unused and in its original packaging.
Return procedure for CY74FCT374ATPC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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