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Texas Instruments CY74FCT377CTSOCG4
- Part No.:
- CY74FCT377CTSOCG4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT377CTSOCG4.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,232
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Product details
Overview
CY74FCT377CTSOCG4 from Texas Instruments is an 8-bit edge-triggered D-type register with clock enable, designed for synchronous data latching in TTL-compatible digital systems. 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. It is used in address/data synchronization, bus interface buffering, and control logic sequencing.
For engineers reviewing the CY74FCT377CTSOCG4 datasheet, CY74FCT377CTSOCG4 pinout, CY74FCT377CTSOCG4 application, or CY74FCT377CTSOCG4 equivalent, key selection criteria include its SOIC-20 package, 4.75–5.25-V supply range, guaranteed 32-mA output sourcing capability, and compatibility with legacy FCT/F logic families in industrial control and embedded timing-critical subsystems.
Technical Context
The CY74FCT377CTSOCG4 implements eight independent D-type flip-flops sharing a common buffered clock (CP) and clock-enable (CE) input. All outputs update synchronously on the low-to-high CP transition when CE is low, with setup/hold times of 2 ns and 1.5 ns respectively.
It integrates edge-rate control circuitry to reduce switching noise, supports Ioff for backflow prevention during power-down, and maintains matched rise/fall times. Its TTL-compatible inputs accept 0.8-V VIL and 2-V VIH thresholds, while outputs deliver VOH ≥ 2.4 V (at –32 mA) and VOL ≤ 0.55 V (at 64 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | 8-bit edge-triggered D-type register with clock enable (CE) |
| Propagation Delay | 5.2 ns max (tPLH/tPHL at VCC = 5 V, TA = 25°C) - enables high-speed synchronous data capture |
| Output Drive | 64 mA sink / 32 mA source - drives heavy capacitive loads and multiple TTL inputs without buffers |
| Supply Voltage | 4.75–5.25 V - tightly regulated 5-V operation compatible with industrial-grade power rails |
| Ioff Support | Active at VCC = 0 V - prevents damaging current backflow during partial power-down |
| Input Compatibility | Fully TTL-compatible - accepts standard 0.8-V/2.0-V logic thresholds without level shifting |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - meets JEDEC JESD22-A114/A115/C101 for robust board-level handling |
Pinout & Package
Package: SOIC-20 (DW), body size 12.83 mm × 5.3 mm, 1.27-mm pitch, RoHS-compliant NiPdAu lead finish, MSL Level-1 (unlimited reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CE (Clock Enable) | Active-low control enabling simultaneous register load on CP↑; must be stable 3.5 ns before CP edge |
| 2–9 | D0–D7 (Data Inputs) | Individual asynchronous D inputs sampled one setup time before CP↑ transition |
| 10 | GND | Power ground reference for all internal logic and output drivers |
| 11 | VCC | 5-V supply rail; decoupling required within 1 cm of pin for noise immunity |
| 12–19 | O0–O7 (Outputs) | Edge-triggered registered outputs; 3-state behavior not supported - outputs always active |
| 20 | CP (Clock) | Buffered low-to-high edge-sensitive clock; all flip-flops triggered simultaneously on CP↑ |
Key Features
| Feature | Design Value |
|---|---|
| Edge-Rate Controlled Outputs | Reduced di/dt minimizes simultaneous switching noise (SSN) in dense PCB layouts |
| Matched Rise/Fall Times | Ensures symmetrical signal transitions - critical for setup/hold margin in high-frequency buses |
| Partial-Power-Down Ioff | Disables outputs when VCC = 0 V - allows safe hot-insertion and mixed-voltage system partitioning |
| TTL-Compatible Interface | Eliminates need for external level shifters when interfacing with legacy 74LS/74ALS logic |
| Low Propagation Skew | ≤0.5 ns inter-output skew - guarantees deterministic timing across all 8 bits |
Applications
| Industrial PLC I/O Expansion | Legacy Bus Interface Buffering |
|---|---|
|
Use Scenario: Latching parallel sensor data from 8-channel analog front-ends into a microcontroller's memory-mapped I/O space. IC Role / Device Role / Timing Role: Synchronous data register providing glitch-free sampling aligned to system clock edges. Use Value: 5.2-ns propagation delay and 2-ns setup time ensure reliable capture at 80-MHz bus clock rates without added wait states. |
Use Scenario: Isolating and synchronizing address/data signals between a modern FPGA and legacy ISA-bus peripherals. IC Role / Device Role / Timing Role: Clock-enabled register aligning asynchronous CPU writes to peripheral timing windows. Use Value: CE-controlled loading enables precise handshaking with ISA READY signals, eliminating metastability risk. |
| Automotive ECU Control Logic | Test Equipment Pattern Generation |
|
Use Scenario: Holding diagnostic command bits for CAN transceiver configuration registers during engine start-up sequences. IC Role / Device Role / Timing Role: Nonvolatile state latch maintaining control settings across brief VCC dips. Use Value: Ioff protection prevents backfeed from powered CAN bus into unpowered ECU domains during brownout conditions. |
Use Scenario: Generating repeatable 8-bit stimulus patterns for IC functional testing under ATE. IC Role / Device Role / Timing Role: Deterministic pattern sequencer synchronized to tester master clock. Use Value: Matched rise/fall times and <0.5 ns output skew guarantee clean, jitter-free waveform edges for pass/fail margin 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 |
|---|---|---|---|
| SN74FCT377TNSR | Same logic function, but rated for 0°C to 70°C only; 7.2-ns propagation delay; SOIC-20, tape-and-reel packaging | Limited temperature range excludes automotive/industrial use; lower drive (32-mA sink) | Select only for commercial-grade cost-sensitive designs where full –40°C to 85°C operation is unnecessary |
| 74ACT377PC | CMOS version with 4.5–5.5-V supply; 10.5-ns typical tPD; no Ioff; higher input capacitance (10 pF vs 5 pF) | Lacks partial-power-down support; less noise-immune due to absence of edge-rate control | Choose when ultra-low ICCD (0.06 mA/MHz) is prioritized over noise performance and hot-swap safety |
Compared with CY74FCT377CTSOCG4, SN74FCT377TNSR trades temperature range and drive strength for lower cost, while 74ACT377PC sacrifices Ioff and edge-rate control for reduced dynamic power - making CY74FCT377CTSOCG4 optimal for noise-sensitive, wide-temperature, and partial-power-down systems.
Availability
CY74FCT377CTSOCG4 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy bus interface buffering, and automotive ECU control logic requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CY74FCT377CTSOCG4 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 components.
CY74FCT377CTSOCG4 belongs to TI's FCT logic family, engineered for noise-immune, TTL-compatible digital interfacing in mission-critical control systems where signal integrity and power-domain isolation are essential.
FAQ
What is the operating temperature range for CY74FCT377CTSOCG4?
The CY74FCT377CTSOCG4 is specified for operation from –40°C to +85°C, making it suitable for industrial environments and automotive under-hood applications where thermal stability is critical. This range is validated per the recommended operating conditions in the official Texas Instruments datasheet SCCS023A.
Does CY74FCT377CTSOCG4 support 3.3-V logic levels?
No, CY74FCT377CTSOCG4 is a 5-V-only device with TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V) and output swing referenced to VCC = 4.75–5.25 V. It does not operate reliably at 3.3-V supply and lacks 3.3-V I/O tolerance - direct connection to 3.3-V systems requires level translation.
Can CY74FCT377CTSOCG4 be used in partial-power-down configurations?
Yes, CY74FCT377CTSOCG4 includes Ioff circuitry that disables outputs when VCC = 0 V, preventing reverse current flow from live buses into unpowered sections. This feature is explicitly tested and guaranteed per JESD78, supporting safe hot-swap and mixed-voltage domain designs.
What is the maximum clock frequency supported by CY74FCT377CTSOCG4?
CY74FCT377CTSOCG4 has no specified maximum clock frequency limit, but its 5.2-ns propagation delay and 2-ns setup time allow reliable operation up to at least 80 MHz in typical PCB layouts with controlled impedance and proper decoupling. Timing margins must be verified per actual layout and load conditions.
Is CY74FCT377CTSOCG4 pin-compatible with other FCT-series registers?
Yes, CY74FCT377CTSOCG4 shares identical pinout and logic function with CY74FCT377ATSOC, CY74FCT377ATSOCT, and SN74FCT377TNSR in SOIC-20 packages. However, speed grade (5.2 ns vs 7.2 ns) and drive strength (64/32 mA vs 32/12 mA) differ - verify timing and loading requirements before substitution.
CY74FCT377CTSOCG4 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
CY74FCT377CTSOCG4 FAQ
1.How can I place an order for CY74FCT377CTSOCG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT377CTSOCG4 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 CY74FCT377CTSOCG4 reliable?
The price and inventory of CY74FCT377CTSOCG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT377CTSOCG4 is usually 5 days.
3.What payment methods are accepted for CY74FCT377CTSOCG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT377CTSOCG4 transactions.
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4.How is shipping managed for CY74FCT377CTSOCG4?
CY74FCT377CTSOCG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT377CTSOCG4 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 CY74FCT377CTSOCG4?
For technical support, including CY74FCT377CTSOCG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT377CTSOCG4 requirements.
6.How does Aetrix verify that CY74FCT377CTSOCG4 is sourced from the original manufacturer or authorized distributors?
All CY74FCT377CTSOCG4 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 CY74FCT377CTSOCG4 meets industry standards.
7.What is the process for return or replacement of CY74FCT377CTSOCG4?
All CY74FCT377CTSOCG4 units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT377CTSOCG4, 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 CY74FCT377CTSOCG4 part is unused and in its original packaging.
Return procedure for CY74FCT377CTSOCG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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