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Texas Instruments CY74FCT374TSOCT
- Part No.:
- CY74FCT374TSOCT
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT374TSOCT.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,987
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Product details
Overview
CY74FCT374TSOCT 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 common buffered clock (CP), shared output-enable (OE), ±32 mA output drive, 5.2 ns max propagation delay, and operates at 4.75–5.25 V over –40°C to +85°C. It is used in data latching and bus isolation within industrial control backplanes.
For engineers reviewing the CY74FCT374TSOCT datasheet, CY74FCT374TSOCT pinout, CY74FCT374TSOCT application, or CY74FCT374TSOCT equivalent, key selection criteria include 3-state bus driving capability, Ioff partial-power-down support, TTL-compatible input thresholds, matched rise/fall times, and SOIC-20 packaging for legacy board compatibility.
Technical Context
This device implements eight independent D-type flip-flops synchronized on the low-to-high transition of CP. Output state is controlled by OE: logic low enables outputs (Q = D at clock edge), high places all outputs in high-impedance. The Ioff circuitry actively disables outputs when VCC = 0 V, preventing backflow current during partial power-down.
It uses FCT logic architecture with edge-rate control to reduce switching noise, supports TTL-level inputs (VIH = 2 V min, VIL = 0.8 V max), and delivers VOH ≥ 2.4 V at –32 mA and VOL ≤ 0.55 V at 64 mA sink - confirming true 5-V TTL/CMOS bus interface capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | FCT - optimized for 5-V TTL/CMOS mixed-signal bus interfacing |
| Propagation Delay (tPLH/tPHL) | 2–5.2 ns - enables reliable operation up to 250 MHz clock rates |
| Output Drive | –32 mA source / +64 mA sink - drives heavy capacitive loads and multiple TTL inputs |
| Ioff Support | ±1 µA at VCC = 0 V - enables safe hot-insertion and partial-power-down system design |
| Supply Voltage Range | 4.75–5.25 V - tight regulation ensures stable timing margins across industrial temperature range |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control applications |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - exceeds JEDEC JESD22 standards for robust handling |
Pinout & Package
Package: SOIC-20 (DW), 7.5 mm × 12.8 mm body, gull-wing leads, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | D0–D7 Data Inputs | Asynchronous D inputs to individual flip-flops; meet 2 ns setup/1.5 ns hold relative to CP↑ |
| 9 | GND | Ground reference for all logic and output stages |
| 10 | VCC | 5-V supply pin; decoupling required within 10 mm of this pin |
| 11, 12, 13, 14, 15, 16, 17, 18 | O0–O7 3-State Outputs | Registered outputs enabled by OE; high-Z when OE = high; match rise/fall times for clean bus transitions |
| 19 | OE | Active-low output enable; controls all eight outputs simultaneously; does not affect internal flip-flop state |
| 20 | CP | Buffered clock input; edge-triggered on low-to-high transition; minimum pulse width 5 ns |
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 | Prevents damaging back-current flow when VCC is off but bus lines remain active - essential for hot-swap and modular systems |
| Matched Rise/Fall Times | Ensures symmetrical output transitions (tPLH ≈ tPHL), minimizing duty-cycle distortion in clocked data paths |
| TTL-Compatible Input Thresholds | VIH = 2 V min / VIL = 0.8 V max - interoperates directly with legacy 5-V TTL without level-shifting |
| 3-State Bus Interface | Enables multi-drop bus architectures with deterministic contention avoidance via OE-controlled output gating |
Applications
| Industrial PLC Backplane | Automotive Body Control Module |
|---|---|
Use Scenario: Latching sensor data from analog-to-digital converters before transmission across a shared 5-V parallel bus. IC Role / Device Role / Timing Role: CY74FCT374TSOCT acts as a synchronous input register, capturing 8-bit ADC results on CP edge while isolating bus during OE high. Use Value: 5.2 ns max tPD and ±64 mA drive ensure clean sampling of fast-changing signals without bus contention or timing violations. | Use Scenario: Buffering switch status (door open/closed, seat position) to microcontroller I/O ports in harsh automotive environments. IC Role / Device Role / Timing Role: CY74FCT374TSOCT serves as an isolated input latch, decoupling noisy mechanical switch bounce from MCU timing domains. Use Value: Ioff support allows safe power sequencing during ignition cycling; ESD ratings exceed ISO 10605 requirements for in-vehicle deployment. |
| Legacy Test Equipment Interface | Communications Baseband Controller |
Use Scenario: Interfacing FPGA-based pattern generators with vintage 5-V TTL instrumentation via parallel control/data buses. IC Role / Device Role / Timing Role: CY74FCT374TSOCT functions as a bidirectional bus transceiver latch, synchronizing FPGA outputs to external instrument clocks. Use Value: Matched rise/fall times and 250-MHz typical switching rate maintain signal fidelity across long traces in rack-mounted test gear. | Use Scenario: Holding configuration bits for RF front-end ICs (e.g., gain settings, filter banks) under real-time software control. IC Role / Device Role / Timing Role: CY74FCT374TSOCT provides glitch-free static control word storage, updated only on command CP edges. Use Value: 3-state outputs allow dynamic reconfiguration without disrupting adjacent signal paths; low ICCD (0.06 mA/MHz) minimizes baseband subsystem power overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74FCT374SOIC | Same FCT family, identical pinout and AC/DC specs; TI second-source part with identical SOIC-20 footprint | No functional difference; validated drop-in replacement per TI documentation | Select when requiring TI's standard commercial-grade marking and traceability without military temp grading |
| 74ACT374SOIC | Higher VOH (≥3.5 V at –24 mA), lower ICC (0.05 mA static), but no Ioff support and 4.5–5.5 V wider VCC range | Lacks partial-power-down protection; unsuitable for hot-swap or mixed-voltage rail systems | Choose for lower static power and higher noise margin where Ioff is not required |
Compared with SN74FCT374SOIC, CY74FCT374TSOCT offers identical functionality and full drop-in compatibility; versus 74ACT374SOIC, it trades slightly higher static current for critical Ioff-enabled system safety in powered-down states.
Availability
CY74FCT374TSOCT is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, and legacy test equipment interfaces requiring stable component supply across extended product lifecycles.
Supply support for CY74FCT374TSOCT 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 delivering analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The CY74FCT374TSOCT belongs to TI's FCT logic family, engineered specifically for high-noise-immunity, 5-V bus interfacing in mission-critical industrial control and instrumentation systems.
FAQ
What is the maximum clock frequency supported by CY74FCT374TSOCT?
CY74FCT374TSOCT supports a typical switching rate of 250 MHz, with guaranteed timing performance up to 100 MHz based on 5.2 ns max propagation delay and 5 ns min clock pulse width. System-level maximum frequency depends on load capacitance, trace routing, and supply stability - design validation at target speed requires measurement under actual board conditions using the specified 50-pF load.
Does CY74FCT374TSOCT support partial power-down operation?
Yes, CY74FCT374TSOCT includes Ioff circuitry that disables outputs when VCC = 0 V, limiting reverse current to ±1 µA even with bus voltages up to 4.5 V applied. This feature enables safe partial-power-down in modular systems and hot-swap applications, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables of the official datasheet.
What is the output drive strength of CY74FCT374TSOCT?
CY74FCT374TSOCT provides –32 mA output source current and +64 mA output sink current under recommended operating conditions (VCC = 4.75–5.25 V, TA = –40°C to +85°C). These values are measured at VOH ≥ 2.4 V and VOL ≤ 0.55 V respectively, enabling direct drive of multiple TTL loads or moderate PCB trace capacitance without external buffers.
Is CY74FCT374TSOCT pin-compatible with older 74LS374 devices?
No, CY74FCT374TSOCT is not pin-compatible with 74LS374. While both are 20-pin SOIC octal D-type registers, CY74FCT374TSOCT uses a different pin assignment: D0–D7 occupy pins 1–8, OE is pin 19, and CP is pin 20; 74LS374 places CP on pin 11 and OE on pin 13. Board-level replacement requires layout revision.
What package type and lead finish does CY74FCT374TSOCT use?
CY74FCT374TSOCT uses a SOIC-20 (DW) package with 7.5 mm × 12.8 mm body dimensions and gull-wing leads. Its lead finish is NiPdAu (nickel-palladium-gold), RoHS-compliant, with Moisture Sensitivity Level (MSL) rating of Level-1 (unlimited floor life at <30°C/60% RH), per TI's official packaging addendum.
CY74FCT374TSOCT 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:
- 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:
- 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-SOIC
CY74FCT374TSOCT FAQ
1.How can I place an order for CY74FCT374TSOCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT374TSOCT 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 CY74FCT374TSOCT reliable?
The price and inventory of CY74FCT374TSOCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT374TSOCT is usually 5 days.
3.What payment methods are accepted for CY74FCT374TSOCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT374TSOCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT374TSOCT?
CY74FCT374TSOCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT374TSOCT 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 CY74FCT374TSOCT?
For technical support, including CY74FCT374TSOCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT374TSOCT requirements.
6.How does Aetrix verify that CY74FCT374TSOCT is sourced from the original manufacturer or authorized distributors?
All CY74FCT374TSOCT 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 CY74FCT374TSOCT meets industry standards.
7.What is the process for return or replacement of CY74FCT374TSOCT?
All CY74FCT374TSOCT units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT374TSOCT, 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 CY74FCT374TSOCT part is unused and in its original packaging.
Return procedure for CY74FCT374TSOCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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