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Texas Instruments CD54HC377F3A
- Part No.:
- CD54HC377F3A
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
CD54HC377F3A.pdf
- Description:
- CD54HC377 HIGH SPEED CMOS LOGIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,251
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Product details
Overview
CD54HC377F3A from Texas Instruments is a military-grade octal D-type flip-flop with buffered common clock and data enable, operating across -55°C to +125°C. It features 2V–6V supply range, 14 ns typical propagation delay (CL = 15 pF, VCC = 5 V), 10 LSTTL fanout, and high noise immunity (NIL/NIH = 30% of VCC). It is used in radiation-tolerant avionics timing control and secure military data latching.
For engineers reviewing the CD54HC377F3A datasheet, CD54HC377F3A pinout, CD54HC377F3A application, or CD54HC377F3A equivalent, key selection criteria include its CERDIP-20 package, extended temperature operation, HC logic family compatibility, and edge-triggered synchronous load behavior with active-low enable.
Technical Context
The CD54HC377F3A implements eight independent D-type flip-flops sharing a single positive-edge-triggered clock (CP) and a common active-low Data Enable (E). All outputs update simultaneously on the rising edge of CP only when E is low - enabling synchronized data capture in deterministic control systems.
Its HC logic architecture ensures CMOS-level power efficiency and noise rejection, with input thresholds referenced to VCC (VIH = 1.5 V min at 2 V, 4.2 V min at 6 V; VIL = 0.5 V max at 2 V, 1.8 V max at 6 V), and output drive capability of ±25 mA per pin under absolute maximum ratings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | High-Speed CMOS (HC), not TTL-compatible - requires VCC-referenced input thresholds |
| Supply Voltage Range | 2 V to 6 V - supports wide-input rail designs including 3.3 V and 5 V systems |
| Propagation Delay | 14 ns typical (CL = 15 pF, VCC = 5 V, TA = 25°C) - enables ≤60 MHz clock operation in benign conditions |
| Operating Temperature | -55°C to +125°C - qualified for military/aerospace environments per MIL-PRF-38535 |
| Fanout Capability | 10 LSTTL loads - sufficient to drive multiple downstream logic stages without buffering |
| Input Leakage Current | ±1 µA max (TA = -55°C to +125°C) - ensures stable enable/control signal integrity over full temp range |
| Quiescent Current | 160 µA max (TA = -55°C to +125°C) - ultra-low static power for battery-backed or power-constrained subsystems |
Pinout & Package
CD54HC377F3A is housed in a hermetically sealed 20-lead CERDIP (Ceramic Dual In-line Package) with 0.3-inch body width and 0.1-inch lead pitch, designed for high-reliability, high-temperature, and radiation-hardened applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (E) | Data Enable Input | Active-low global enable - all flip-flops latch only when E = LOW; HIGH holds outputs unchanged |
| 2–9 (D0–D7) | Data Inputs | Asynchronous parallel data inputs feeding respective D-type latches |
| 10 (GND) | Ground Reference | Primary digital ground return path - must be low-impedance for noise immunity |
| 11–18 (Q0–Q7) | Output Terminals | True (non-inverted) registered outputs - each mirrors corresponding Dn after CP edge and E = LOW |
| 19 (CP) | Clock Input | Buffered positive-edge-triggered clock - synchronizes all eight flip-flops simultaneously |
| 20 (VCC) | Power Supply | CMOS supply rail - must be decoupled locally with 0.1 µF ceramic capacitor near pin |
Key Features
| Feature | Design Value |
|---|---|
| Buffered Common Clock | Reduces clock skew across all eight flip-flops - critical for deterministic timing in safety-critical control loops |
| Simultaneous Edge-Triggered Load | All Qn outputs update within one propagation delay of CP edge - eliminates staggered latency in parallel data paths |
| Extended Temperature Operation | Validated performance from -55°C to +125°C - meets MIL-STD-883 requirements for harsh-environment deployment |
| High Noise Immunity | NIL/NIH = 30% of VCC - rejects supply- and crosstalk-induced transients in electrically noisy platforms |
| Low Quiescent Power | ICC ≤ 160 µA over full temperature range - enables use in always-on monitoring circuits with minimal thermal impact |
Applications
| Avionics Flight Control | Military Secure Comms |
|---|---|
Use Scenario: Capturing sensor fusion data (IMU, GPS, air data) into synchronized registers prior to FCS computation. IC Role / Device Role / Timing Role: Octal synchronous latch providing glitch-free, edge-aligned sampling of parallel bus data under flight computer control. Use Value: Eliminates metastability risk across eight channels using a single hardened clock domain and guaranteed setup/hold times (tSU = 10 ns, tH = 3 ns at VCC = 6 V). | Use Scenario: Securing cryptographic key loading into tamper-responsive FPGA configuration registers. IC Role / Device Role / Timing Role: Radiation-tolerant data staging buffer ensuring atomic, clock-synchronized transfer of encryption keys to secure logic. Use Value: CERDIP packaging and -55°C to +125°C qualification ensure reliable operation in airborne crypto modules exposed to thermal cycling and ionizing radiation. |
| Spacecraft Telemetry | Defense Radar Signal Processing |
Use Scenario: Latching analog-to-digital converter outputs from multi-channel telemetry front-ends before downlink formatting. IC Role / Device Role / Timing Role: Parallel data register aligning sampled sensor values to a centralized system clock for time-tagged packetization. Use Value: 14 ns propagation delay and balanced transition times maintain sub-10 ns channel-to-channel skew - preserving timestamp accuracy across 8-channel acquisition. | Use Scenario: Synchronizing pulse-Doppler radar echo samples across multiple receiver chains before digital beamforming. IC Role / Device Role / Timing Role: Deterministic parallel latch enabling coherent integration of phase-aligned IF samples across distributed ADC paths. Use Value: Buffered CP input and simultaneous update guarantee zero-cycle inter-channel misalignment - essential for maintaining beam pattern fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD54HCT377F3A | LSTTL-compatible inputs (VIH = 2 V min, VIL = 0.8 V max); 4.5–5.5 V only; 16 ns typical tPD | Required where legacy 5 V TTL logic drives inputs directly without level translation | Select when interfacing with standard LS-TTL families; not suitable for 3.3 V or wide-supply systems |
| CD74HC377E | Same HC logic, identical function, but in plastic PDIP-20; commercial/military temp range (-55°C to +125°C); no hermetic seal | Suitable for non-radiation, non-hermetic cost-sensitive programs where CERDIP reliability is not mandated | Choose for prototyping or industrial applications needing same timing but lower cost and easier assembly |
Compared with CD54HC377F3A, CD54HCT377F3A trades supply flexibility and noise margin for direct TTL interoperability, while CD74HC377E retains functional equivalence but sacrifices hermeticity and radiation tolerance - making CD54HC377F3A the sole choice for mission-critical space and defense deployments requiring CERDIP reliability.
Availability
CD54HC377F3A is available at Aetrix Electronics and suitable for avionics flight control, military secure communications, and spacecraft telemetry requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for CD54HC377F3A 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 U.S.-based semiconductor company specializing in analog, embedded processing, and high-reliability logic solutions for aerospace, defense, and industrial markets.
The CD54HC377F3A belongs to TI's military-grade High-Speed CMOS Logic product line, engineered for deterministic, radiation-tolerant digital sequencing in mission-critical systems where failure is not an option.
FAQ
What is the maximum clock frequency supported by the CD54HC377F3A?
The CD54HC377F3A supports up to 23 MHz maximum clock frequency at VCC = 6 V and TA = -55°C to +125°C, and up to 20 MHz at VCC = 4.5 V across the full temperature range. These values derive from worst-case propagation delay (tPLH/tPHL ≤ 45 ns at VCC = 6 V, CL = 50 pF) and minimum clock pulse width (tW ≥ 20 ns) specifications in the official datasheet SCHS184C.
Does the CD54HC377F3A support 3.3 V operation?
Yes, the CD54HC377F3A fully supports 3.3 V operation as part of its 2 V to 6 V supply range. At VCC = 3.3 V, VIH is guaranteed ≥ 2.0 V and VIL ≤ 1.0 V, and propagation delay remains within specification (≤ 53 ns at CL = 50 pF). This makes CD54HC377F3A compatible with mixed-voltage 3.3 V/5 V systems without level shifters.
Is the CD54HC377F3A pin-compatible with CD74HC377 variants?
Yes, the CD54HC377F3A shares identical pinout and logic functionality with CD74HC377E, CD74HC377M, and CD74HC377PW - all are 20-pin devices with matching terminal assignments (E, D0–D7, GND, Q0–Q7, CP, VCC). However, CD54HC377F3A uses CERDIP packaging, whereas CD74HC377 variants use PDIP, SOIC, or TSSOP - requiring PCB layout adaptation despite functional equivalence.
What is the purpose of the buffered clock (CP) input in the CD54HC377F3A?
The buffered CP input in CD54HC377F3A minimizes clock skew and improves noise rejection by isolating the external clock source from internal capacitive loading of all eight flip-flop clock inputs. This ensures simultaneous, deterministic edge triggering across all Q outputs - a requirement for coherent multi-channel data capture in systems like radar receivers and flight control computers.
How does the Data Enable (E) pin function in the CD54HC377F3A?
The E pin in CD54HC377F3A is an active-low global enable that gates the clock's effect on all eight flip-flops. When E = LOW, data on D0–D7 transfers to Q0–Q7 on the next rising CP edge; when E = HIGH, outputs retain their last state regardless of CP transitions. This allows precise, software- or hardware-controlled latching windows without modifying the clock signal itself.
CD54HC377F3A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 54HC
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Type:
- -
- Output Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- -
- Trigger Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Current - Quiescent (Iq):
- -
- Input Capacitance:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
CD54HC377F3A FAQ
1.How can I place an order for CD54HC377F3A through Aetrix?
Please submit a Request for Quotation (RFQ) for CD54HC377F3A 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 CD54HC377F3A reliable?
The price and inventory of CD54HC377F3A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD54HC377F3A is usually 5 days.
3.What payment methods are accepted for CD54HC377F3A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD54HC377F3A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD54HC377F3A?
CD54HC377F3A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD54HC377F3A 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 CD54HC377F3A?
For technical support, including CD54HC377F3A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD54HC377F3A requirements.
6.How does Aetrix verify that CD54HC377F3A is sourced from the original manufacturer or authorized distributors?
All CD54HC377F3A 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 CD54HC377F3A meets industry standards.
7.What is the process for return or replacement of CD54HC377F3A?
All CD54HC377F3A units undergo pre-shipment inspection (PSI). If there is an issue with CD54HC377F3A, 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 CD54HC377F3A part is unused and in its original packaging.
Return procedure for CD54HC377F3A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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