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Texas Instruments CY74FCT374CTSOCT
- Part No.:
- CY74FCT374CTSOCT
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT374CTSOCT.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,971
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Product details
Overview
CY74FCT374CTSOCT 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), 5.2 ns maximum propagation delay, ±64 mA sink/source drive capability, and Ioff support for partial-power-down operation. It operates at 4.75–5.25 V and is used in data latching, address/data bus isolation, and synchronous interface buffering.
For engineers reviewing the CY74FCT374CTSOCT datasheet, CY74FCT374CTSOCT pinout, CY74FCT374CTSOCT application, or CY74FCT374CTSOCT equivalent, key selection considerations include its 20-pin SOIC package, 3-state bus-driving strength, TTL-compatible input thresholds, Ioff-enabled power-down safety, and 5.2 ns tPLH/tPHL timing at 5 V.
Technical Context
The CY74FCT374CTSOCT implements eight independent D-type flip-flops sharing a single positive-edge-triggered clock (CP) and a common 3-state output-enable (OE). Its logic diagram confirms true D-register behavior with setup/hold times of 2 ns and 1.5 ns respectively, and no internal feedback or latch-up paths.
It uses FCT-family silicon with edge-rate control circuitry to reduce switching noise, matched rise/fall times, and ESD protection exceeding JESD22-A114A (2000 V HBM). The Ioff specification ensures <±1 µA backflow current when VCC = 0 V and outputs are biased to 4.5 V - critical for hot-swap and multi-rail system interoperability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.75 V to 5.25 V - ensures stable operation across industrial-grade 5 V supply tolerances. |
| Max Propagation Delay (tPLH/tPHL) | 5.2 ns - enables reliable 192 MHz synchronous operation in high-speed bus interfaces. |
| Output Drive (IOL/IOH) | 64 mA sink / 32 mA source - drives heavy capacitive loads and multiple TTL inputs without external buffers. |
| 3-State Enable/Disable Times | tPZH/tPZL ≤ 5.5 ns, tPHZ/tPLZ ≤ 5.0 ns - supports fast bus turnaround in bidirectional data transfer protocols. |
| Ioff Current | ±1 µA at VCC = 0 V - prevents damaging back-current during partial power-down or hot-insertion scenarios. |
| Input Thresholds (VIH/VIL) | VIH = 2.0 V min, VIL = 0.8 V max - fully compatible with standard TTL logic levels for seamless interfacing. |
| ESD Rating | 2000 V HBM, 200 V MM, 1000 V CDM - exceeds JEDEC requirements for robust board-level handling and field reliability. |
Pinout & Package
Package: 20-pin SOIC (DW), body size 7.5 mm × 12.8 mm, standard JEDEC MS-013AC footprint, RoHS-compliant NiPdAu lead finish, MSL Level-1 (unlimited reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE | Active-low 3-state output enable - disables all eight outputs to high-impedance when high; no effect on internal flip-flop states. |
| 2–9 | D0–D7 | Independent asynchronous data inputs - each samples on rising CP edge and holds until next clock. |
| 10 | GND | Power ground reference - must be low-impedance connection to minimize ground bounce in high-speed switching. |
| 11 | VCC | Positive supply (4.75–5.25 V) - requires local 0.1 µF ceramic decoupling adjacent to pin. |
| 12–19 | O0–O7 | 3-state buffered outputs - reflect registered D-input values when OE = low; high-Z when OE = high. |
| 20 | CP | Buffered clock input - positive-edge sensitive; includes hysteresis and edge-rate control for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Edge-Rate Controlled Outputs | Reduces simultaneous switching noise (SSN) by limiting dv/dt - critical for signal integrity in dense PCB layouts. |
| Ioff Partial-Power-Down Support | Enables safe operation when VCC is removed while other rails remain active - prevents latch-up and backfeed in mixed-voltage systems. |
| TTL-Compatible Input Thresholds | VIH ≥ 2.0 V and VIL ≤ 0.8 V allow direct connection to legacy 5 V TTL outputs without level-shifting. |
| Matched Rise/Fall Times | Ensures symmetrical waveform edges - minimizes duty-cycle distortion in clock distribution and timing-critical paths. |
| 250-MHz Typical Switching Rate | Validated under load conditions - confirms suitability for high-throughput data capture in test equipment and communication interfaces. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
|
Use Scenario: Latching sensor inputs and driving actuator control lines in modular I/O expansion racks with shared backplane buses. IC Role / Device Role / Timing Role: Synchronous data register providing glitch-free sampling of analog-to-digital converter outputs and isolating microcontroller GPIO from noisy relay drivers. Use Value: 64 mA sink capability directly drives optocoupler LEDs; Ioff prevents backfeed during module hot-swap; 5.2 ns timing supports 100+ kHz scan rates. |
Use Scenario: Buffering and isolating LIN bus transceiver status signals and door-lock actuator commands in centralized body electronics modules. IC Role / Device Role / Timing Role: Edge-triggered register synchronizing asynchronous switch inputs to the main MCU clock domain while enabling/disabling bus access via OE. Use Value: TTL-compatible inputs interface directly with legacy LIN transceivers; 3-state outputs prevent bus contention during sleep mode transitions. |
| Test Equipment Digital Pattern Generator | Legacy PC ISA Bus Interface Adapter |
|
Use Scenario: Holding parallel stimulus patterns for automated functional testing of ASICs and FPGAs using high-speed digital I/O cards. IC Role / Device Role / Timing Role: High-drive octal register staging pattern data from FPGA fabric to 50 Ω transmission lines with precise edge alignment. Use Value: Matched rise/fall times preserve signal fidelity; 5.2 ns propagation delay enables sub-10 ns timing resolution; SOIC package supports compact layout density. |
Use Scenario: Isolating ISA bus data/address lines between legacy x86 CPU and modern peripheral controllers in industrial retrofits. IC Role / Device Role / Timing Role: Bidirectional bus latch registering CPU writes and presenting read data, controlled by ISA IOR/IOW strobes mapped to CP/OE. Use Value: Full TTL compatibility ensures plug-and-play integration; 3-state outputs eliminate need for external bus transceivers; 20-pin SOIC fits constrained board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit D-register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74FCT374ATSOCT | Same 20-pin SOIC package, identical pinout, but rated for –40°C to 85°C only (vs. CY74FCT374CTSOCT's extended 5.2 ns speed grade); IOH = 12 mA (lower drive). | Lower output drive limits use in high-capacitance or multi-load bus environments; suitable for cost-sensitive commercial designs without industrial temp or drive demands. | Select SN74FCT374ATSOCT only if 12 mA sourcing suffices and extended temperature range is unnecessary. |
| 74ACT374SCX | CMOS-based, 4.5–5.5 V supply, 10 ns max tPD, 24 mA drive, no Ioff support, different pinout (CP on pin 11, OE on pin 1). | Lacks Ioff and edge-rate control - unsuitable for partial-power-down or noise-sensitive applications; requires PCB redesign due to non-compatible pin mapping. | Choose 74ACT374SCX only for legacy CMOS systems where Ioff and noise immunity are not required and layout can accommodate pinout change. |
Compared with SN74FCT374ATSOCT and 74ACT374SCX, the CY74FCT374CTSOCT delivers superior bus-driving strength, guaranteed 5.2 ns timing, and essential Ioff protection - making it the preferred choice for industrial, automotive, and test equipment requiring robustness and deterministic timing.
Availability
CY74FCT374CTSOCT is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and test equipment digital pattern generators requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for CY74FCT374CTSOCT 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 founded in 1930, delivering analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The CY74FCT374CTSOCT belongs to TI's FCT logic family, engineered for high-speed, low-noise, TTL-compatible bus interface applications with emphasis on robustness in harsh electrical environments and mixed-voltage system interoperability.
FAQ
What is the maximum clock frequency supported by CY74FCT374CTSOCT?
The CY74FCT374CTSOCT has a maximum propagation delay of 5.2 ns and minimum clock pulse width of 5 ns, supporting reliable operation up to 192 MHz in ideal conditions. Real-world frequency depends on load capacitance, trace routing, and supply stability - design validation at target frequency is recommended using the device's specified setup/hold (2 ns/1.5 ns) and timing margins.
Does CY74FCT374CTSOCT support partial power-down operation?
Yes, CY74FCT374CTSOCT includes Ioff circuitry that disables outputs and limits reverse current to ±1 µA when VCC = 0 V and outputs are biased to 4.5 V. This feature enables safe partial-power-down operation in multi-rail systems and hot-swap capable backplanes without risk of damaging back-current flow.
What is the function of the OE pin on CY74FCT374CTSOCT?
The OE (Output Enable) pin on CY74FCT374CTSOCT is an active-low control that places all eight O0–O7 outputs into high-impedance state when driven high. When OE is low, outputs reflect the registered D-input values sampled on the preceding rising CP edge. OE state does not affect internal flip-flop storage - data remains retained regardless of OE level.
Can CY74FCT374CTSOCT interface directly with standard TTL logic?
Yes, CY74FCT374CTSOCT is fully compatible with standard TTL input and output logic levels: VIH = 2.0 V min and VIL = 0.8 V max match TTL thresholds, and VOH ≥ 2.4 V / VOL ≤ 0.55 V meet TTL output specifications at rated drive currents. No level-shifting circuitry is required for direct interconnection with 5 V TTL devices.
What package type and dimensions does CY74FCT374CTSOCT use?
CY74FCT374CTSOCT uses a 20-pin SOIC (DW) package per JEDEC MS-013AC, measuring 7.5 mm × 12.8 mm with 1.27 mm pitch. It features RoHS-compliant NiPdAu lead finish, MSL Level-1 rating (unlimited floor life), and is supplied in tape-and-reel format (2000 units per reel) with Q1 pin-1 orientation.
CY74FCT374CTSOCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-SOIC
CY74FCT374CTSOCT FAQ
1.How can I place an order for CY74FCT374CTSOCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT374CTSOCT 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 CY74FCT374CTSOCT reliable?
The price and inventory of CY74FCT374CTSOCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT374CTSOCT is usually 5 days.
3.What payment methods are accepted for CY74FCT374CTSOCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT374CTSOCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT374CTSOCT?
CY74FCT374CTSOCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT374CTSOCT 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 CY74FCT374CTSOCT?
For technical support, including CY74FCT374CTSOCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT374CTSOCT requirements.
6.How does Aetrix verify that CY74FCT374CTSOCT is sourced from the original manufacturer or authorized distributors?
All CY74FCT374CTSOCT 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 CY74FCT374CTSOCT meets industry standards.
7.What is the process for return or replacement of CY74FCT374CTSOCT?
All CY74FCT374CTSOCT units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT374CTSOCT, 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 CY74FCT374CTSOCT part is unused and in its original packaging.
Return procedure for CY74FCT374CTSOCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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