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Texas Instruments CY74FCT377CTSOC
- Part No.:
- CY74FCT377CTSOC
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT377CTSOC.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,038
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Product details
Overview
CY74FCT377CTSOC from Texas Instruments is an 8-bit edge-triggered D-type register IC with clock enable, designed for synchronous data latching in address/data bus interfaces. It features 64-mA sink / 32-mA source drive strength, 5.2-ns propagation delay (tPLH/tPHL), and Ioff support for partial-power-down operation. Used in industrial control backplanes requiring TTL-compatible timing and noise-immune signal registration.
For engineers reviewing the CY74FCT377CTSOC datasheet, CY74FCT377CTSOC pinout, CY74FCT377CTSOC application, or CY74FCT377CTSOC equivalent, key selection criteria include its SOIC-20 package, 4.75–5.25-V supply range, 2-ns setup/hold timing margins, and compatibility with FCT-family logic families in legacy 5-V systems.
Technical Context
The CY74FCT377CTSOC implements eight independent D-type flip-flops sharing a common buffered clock (CP) and active-low clock enable (CE). All outputs update synchronously on the low-to-high CP transition when CE is asserted low, with data sampled one setup time before the clock edge.
It integrates edge-rate control circuitry to reduce switching noise, matched rise/fall times for minimized skew, and Ioff protection that disables outputs during power-down to prevent backflow current. Fully compatible with TTL input thresholds (VIH = 2 V, VIL = 0.8 V) and drives standard TTL loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 5.2 ns max (tPLH/tPHL at VCC = 5 V, CL = 50 pF) - ensures tight timing margin in high-speed 5-V bus synchronization |
| Output Drive | 64 mA sink / 32 mA source - supports direct driving of multiple TTL inputs without buffers |
| Supply Voltage | 4.75–5.25 V - tightly regulated 5-V operation compliant with commercial-grade TTL systems |
| Setup/Hold Time | tsu = 2 ns, th = 1.5 ns - enables reliable capture of fast-changing address/data signals in synchronous designs |
| Ioff Support | ±1 µA at VCC = 0 V - prevents damaging current flow during hot-insertion or partial system power-down |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - meets industrial-level robustness requirements for board-level handling |
| Input Compatibility | TTL-level VIH = 2 V, VIL = 0.8 V - interoperable with legacy 74LS/74ALS logic without level-shifting |
Pinout & Package
Package: SOIC-20 (DW), 7.5 mm × 12.8 mm body, 1.27 mm pitch, RoHS-compliant NiPdAu lead finish, MSL Level-1 (unlimited reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 7, 8, 10, 11 | D0–D7 Data Inputs | Asynchronous parallel data inputs sampled on CP↑; TTL-compatible voltage thresholds |
| 3, 6, 9, 12, 13, 15, 16, 18 | O0–O7 Outputs | Edge-triggered registered outputs; 3-state disabled when CE = high |
| 14 | GND | Ground reference for all logic and power domains |
| 20 | VCC | 5-V supply rail; decoupling required within 1 cm of pin |
| 19 | CP | Buffered clock input; low-to-high transition triggers simultaneous register update |
| 17 | CE | Active-low clock enable; must be stable ≥2 ns before CP↑ for predictable operation |
Key Features
| Feature | Design Value |
|---|---|
| Edge-Rate Controlled Outputs | Slower edge rates reduce EMI and crosstalk in dense PCB layouts without sacrificing speed |
| Matched Rise/Fall Times | Minimizes output skew across all 8 channels (<0.5 ns variation), critical for parallel bus integrity |
| Partial-Power-Down Ioff | Enables safe insertion into live backplanes by disabling outputs when VCC = 0 V |
| TTL-Compatible Input Thresholds | VIH = 2 V / VIL = 0.8 V allows direct interfacing with 74LS, 74ALS, and other legacy logic families |
| Reduced VOH (Typ. 3.3 V) | Lower high-level output voltage improves noise margin against VCC noise in mixed-signal environments |
Applications
| Industrial PLC Backplane | Legacy Memory Interface |
|---|---|
Use Scenario: Synchronizing address and data lines between microcontroller and parallel SRAM/ROM in programmable logic controllers. IC Role / Device Role / Timing Role: 8-bit registered latch providing setup/hold compliance for 5-V memory access cycles. Use Value: Enables reliable 5-MHz bus operation with 2-ns setup margin and eliminates metastability in multi-clock-domain transfers. | Use Scenario: Capturing CPU address bus outputs for static decoding in retro-computing or test equipment. IC Role / Device Role / Timing Role: Edge-triggered D-register holding stable address values during memory read/write strobes. Use Value: Provides deterministic sampling of asynchronous address transitions with sub-ns skew across all 8 bits. |
| Automotive Body Control Module | Test Equipment Signal Conditioning |
Use Scenario: Latching sensor input status (e.g., door open/closed, seatbelt buckle) before CAN message framing. IC Role / Device Role / Timing Role: Synchronous input register isolating noisy analog subsystems from digital control logic. Use Value: Ioff support allows safe hot-swap of sensor modules while main MCU remains powered. | Use Scenario: Buffering and synchronizing digital stimulus signals in automated test equipment (ATE) pattern generators. IC Role / Device Role / Timing Role: Timing-critical data register ensuring precise alignment of test vectors to device-under-test clocks. Use Value: 5.2-ns propagation delay and matched edges guarantee <100-ps inter-channel skew for multi-pin parallel testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74FCT377NSR | Same SOIC-20 package, identical pinout, but rated for 7.2-ns max propagation delay and 32-mA sink/source drive | Suitable for lower-speed 5-V systems where reduced drive strength suffices | Select when cost sensitivity outweighs need for 64-mA drive or 5.2-ns timing |
| 74ACT377SCX | ACT-family CMOS variant; higher VOH (~4.4 V), wider VCC range (4.5–5.5 V), no Ioff, 10.5-ns typical delay | Better noise immunity in high-noise environments but lacks partial-power-down capability | Choose for new designs needing broader supply tolerance and higher noise margins, not legacy FCT drop-in replacement |
Compared with SN74FCT377NSR and 74ACT377SCX, the CY74FCT377CTSOC delivers superior drive strength and tighter timing for demanding 5-V bus interfaces, while its Ioff feature uniquely supports hot-plug architectures where other alternatives require external isolation.
Availability
CY74FCT377CTSOC is available at Aetrix Electronics and suitable for industrial PLC backplanes, legacy memory interfaces, and automotive body control modules requiring stable component supply across extended product lifecycles.
Supply support for CY74FCT377CTSOC 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 for industrial, automotive, and communications markets.
The CY74FCT377CTSOC belongs to TI's FCT logic family, engineered for high-speed, low-noise 5-V TTL-compatible digital interfacing in mission-critical industrial and legacy computing systems.
FAQ
What is the maximum operating temperature range for the CY74FCT377CTSOC?
The CY74FCT377CTSOC is specified for commercial operation from –40°C to +85°C. This range aligns with standard SOIC-packaged logic devices used in industrial control and computing equipment where ambient thermal management is controlled. The device's thermal impedance (θJA = 58°C/W) ensures stable performance under continuous 5-V operation within this envelope.
Does the CY74FCT377CTSOC support 3.3-V logic levels?
No, the CY74FCT377CTSOC is a 5-V-only device with TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V) and requires VCC = 4.75–5.25 V. Its outputs swing to ~3.3 V (typical VOH) but are not 3.3-V tolerant - applying 3.3-V signals to inputs may violate VIH/VIL specifications and cause unreliable operation. For mixed-voltage systems, level translation is required.
Can the CY74FCT377CTSOC be used as a direct replacement for SN74FCT377N?
Yes, the CY74FCT377CTSOC is functionally and pin-compatible with SN74FCT377N in SOIC-20 packages. Both share identical pinout, timing parameters (5.2-ns max delay), drive strength (64-mA sink), and Ioff support. The CY74FCT377CTSOC offers identical electrical behavior and is manufactured to TI's updated process with enhanced ESD ratings (2000-V HBM), making it a validated drop-in upgrade.
What is the purpose of the CE (clock enable) pin on the CY74FCT377CTSOC?
The CE pin on the CY74FCT377CTSOC is an active-low control that gates the clock input: only when CE = low does the rising edge of CP load data from D0–D7 into O0–O7. When CE = high, outputs retain their last state regardless of CP activity. This enables selective registration in multi-cycle bus protocols and reduces unnecessary toggling to minimize dynamic power and noise.
Is the CY74FCT377CTSOC RoHS compliant and lead-free?
Yes, the CY74FCT377CTSOC is RoHS compliant with NiPdAu lead finish and meets JEDEC Level-1 moisture sensitivity (unlimited floor life). Its SOIC-20 (DW) package uses lead-free terminations and is qualified for standard 260°C reflow profiles. Full compliance documentation, including material declarations and test reports, is available through TI's official product page and Aetrix Electronics' quality portal.
CY74FCT377CTSOC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- -
- 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
CY74FCT377CTSOC FAQ
1.How can I place an order for CY74FCT377CTSOC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT377CTSOC 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 CY74FCT377CTSOC reliable?
The price and inventory of CY74FCT377CTSOC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT377CTSOC is usually 5 days.
3.What payment methods are accepted for CY74FCT377CTSOC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT377CTSOC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT377CTSOC?
CY74FCT377CTSOC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT377CTSOC 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 CY74FCT377CTSOC?
For technical support, including CY74FCT377CTSOC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT377CTSOC requirements.
6.How does Aetrix verify that CY74FCT377CTSOC is sourced from the original manufacturer or authorized distributors?
All CY74FCT377CTSOC 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 CY74FCT377CTSOC meets industry standards.
7.What is the process for return or replacement of CY74FCT377CTSOC?
All CY74FCT377CTSOC units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT377CTSOC, 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 CY74FCT377CTSOC part is unused and in its original packaging.
Return procedure for CY74FCT377CTSOC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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