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NXP Semiconductors 74HC377N,652
- Part No.:
- 74HC377N,652
- Manufacturer:
- NXP Semiconductors
- Category:
- Flip Flops
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
74HC377N,652.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,263
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Product details
Overview
74HC377N,652 from NXP Semiconductors (formerly Philips) is an octal positive-edge-triggered D-type flip-flop with common clock and active-low data enable, operating at 5 V supply, 13 ns typical propagation delay (CP to Qn), and 77 MHz maximum clock frequency. It serves as an addressable register in synchronous digital systems requiring simultaneous data latching across eight channels.
For engineers reviewing the 74HC377N,652 datasheet, 74HC377N,652 pinout, 74HC377N,652 application, or 74HC377N,652 equivalent, key selection criteria include edge-triggered synchronization, data enable timing constraints (tsu = 12 ns, th = 3 ns), standard-output drive capability, and compatibility with LSTTL logic families.
Technical Context
The 74HC377N,652 implements eight independent D-type storage elements sharing a single LOW-to-HIGH clock edge trigger and a global active-low data enable (E). Its operation requires Dn and E to be stable one setup time before the CP rising edge for deterministic state transfer.
It belongs to the 74HC high-speed CMOS logic family, specified per JEDEC Std 7A, and is pin-compatible with LS-TTL. DC characteristics follow HC-level voltage thresholds (VI = GND to VCC), and dynamic power is calculated using CPD = 20 pF per flip-flop.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74HC high-speed CMOS, JEDEC Std 7A compliant |
| Propagation Delay (CP→Qn) | 13 ns typical at VCC = 5 V, CL = 15 pF - determines max system timing margin |
| Max Clock Frequency | 77 MHz at VCC = 5 V - supports high-throughput register staging |
| Input Capacitance | 3.5 pF - minimizes loading on driving logic stages |
| Power Dissipation Cap. (CPD) | 20 pF per flip-flop - enables accurate dynamic power estimation |
| Supply Voltage Range | 2.0–6.0 V - allows operation across industrial and mixed-voltage designs |
| Output Drive | Standard CMOS output - compatible with TTL and CMOS loads without buffering |
Pinout & Package
74HC377N,652 is supplied in a 20-pin dual in-line package (DIP) with through-hole mounting. Pin 10 is GND, pin 20 is VCC, and all inputs/outputs are arranged to support compact PCB layout with minimal signal crosstalk.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| E | Data enable input (active LOW) | Enables simultaneous loading of all eight D inputs on next CP rising edge |
| CP | Clock input (LOW-to-HIGH edge-triggered) | Edge-sensitive control signal defining latch timing boundary |
| D0–D7 | Data inputs | Eight asynchronous parallel inputs sampled one setup time before CP↑ |
| Q0–Q7 | Flip-flop outputs | Eight registered outputs retaining state until next enabled clock edge |
| VCC | Positive supply voltage | 2.0–6.0 V CMOS supply rail; decoupling required near pin 20 |
| GND | Ground reference | 0 V return path; must be low-impedance for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Octal positive-edge D flip-flops | Eight synchronized storage elements sharing one clock and enable - reduces control logic overhead in bus interface registers |
| Active-low data enable (E) | Allows precise gating of register updates without clock manipulation - critical for address/data co-synchronization |
| Standard output drive | Direct interfacing with TTL and CMOS loads - eliminates need for external buffers in mid-speed logic systems |
| LSTTL pin compatibility | Drop-in replacement for 74LS377 in legacy upgrades - preserves existing PCB layouts and timing analysis |
Applications
| Microprocessor Address Latch | Parallel Data Acquisition Buffer |
|---|---|
Use Scenario: Capturing 8-bit address bus signals during microprocessor memory access cycles. IC Role / Device Role / Timing Role: Synchronous address register holding stable address values while data transfers occur. Use Value: Prevents address glitches during bus contention by latching only on valid CP edges with E asserted. | Use Scenario: Temporarily storing sensor readings from 8-bit parallel ADC outputs before serial transmission. IC Role / Device Role / Timing Role: Edge-triggered data capture stage synchronizing analog-to-digital conversion results to system clock domain. Use Value: Ensures deterministic sampling window via tsu = 12 ns and th = 3 ns timing margins at 5 V. |
| Industrial I/O Expansion Register | Digital Control Signal Sequencer |
Use Scenario: Expanding GPIO count in PLC modules using multiplexed control buses. IC Role / Device Role / Timing Role: Output register holding steady-state control bits for relays, indicators, or actuators. Use Value: Provides glitch-free output updates via common CP and E, avoiding partial writes during bus arbitration. | Use Scenario: Generating timed control pulses for stepper motor drivers or PWM gate sequencing. IC Role / Device Role / Timing Role: State-holding element in finite-state machines requiring precise edge-aligned transitions. Use Value: Enables predictable state advancement with 13 ns CP→Qn delay and 77 MHz fmax - suitable for sub-100 ns cycle timing. |
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 |
|---|---|---|---|
| 74HCT377N,652 | TTL-compatible input thresholds (VI = GND to 3 V); identical pinout and AC specs except fmax = 53 MHz at 5 V | Better interoperability with legacy 5 V TTL systems where input noise margins matter | Select when interfacing directly with LS-TTL outputs without level shifters |
| SN74HC377N | Same 74HC family specs, identical AC/DC parameters, but packaged in Texas Instruments' standard 20-pin PDIP with different moisture sensitivity and reel packaging | No functional difference; suited for TI-centric BOMs or dual-sourcing requirements | Choose for supply chain diversification while maintaining full electrical and mechanical equivalence |
Compared with 74HC377N,652, the 74HCT377N,652 offers improved input compatibility with TTL logic but trades 24 MHz of clock headroom, while SN74HC377N delivers identical performance with alternate logistics handling - enabling design continuity across vendor ecosystems.
Availability
74HC377N,652 is available at Aetrix Electronics and suitable for microprocessor address latching, parallel data acquisition buffering, and industrial I/O expansion requiring stable component supply across long-lifecycle embedded programs.
Supply support for 74HC377N,652 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
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications.
The 74HC377N,652 belongs to NXP's legacy 74HC logic portfolio, designed for robust, low-power, pin-compatible replacements of bipolar TTL in synchronous digital control and interface subsystems.
FAQ
What is the function of the E (enable) pin on the 74HC377N,652?
The E pin on the 74HC377N,652 is an active-low data enable input that gates the clock's effect on the flip-flops. When E is HIGH, the 74HC377N,652 holds its current outputs regardless of CP transitions. Only when E is LOW does a LOW-to-HIGH CP edge load the Dn inputs into Qn outputs. This enables precise synchronization of multi-byte data transfers without modifying the clock signal itself.
Does the 74HC377N,652 support operation at 3.3 V supply?
Yes, the 74HC377N,652 supports operation from 2.0 V to 6.0 V, including 3.3 V nominal supply. At 3.3 V, propagation delay increases (e.g., tPHL/tPLH ≈ 27 ns typical), and maximum clock frequency drops to ~35 MHz, as confirmed in the AC Characteristics table for VCC = 3.3 V (interpolated from 2.0 V and 4.5 V data). System timing must be re-verified at this voltage.
Is the 74HC377N,652 pin-compatible with the 74LS377?
Yes, the 74HC377N,652 is fully pin-compatible with the 74LS377, sharing identical pin configuration, terminal functions, and logic behavior. It was explicitly designed as a drop-in CMOS replacement for LS-TTL, meeting JEDEC Std 7A and offering lower power consumption, higher noise immunity, and wider supply range - making it suitable for direct board-level upgrades.
What is the minimum setup time required for D inputs relative to CP on the 74HC377N,652?
The minimum setup time (tsu) for Dn inputs relative to the LOW-to-HIGH CP transition is 12 ns at VCC = 4.5 V and Tamb = +25 °C, per the AC Characteristics table. Over the full industrial temperature range (−40 °C to +85 °C) and VCC = 4.5 V, tsu is guaranteed ≤15 ns. Violating this spec risks metastability or incorrect latching in the 74HC377N,652.
Can the 74HC377N,652 drive LED loads directly?
No, the 74HC377N,652 features standard CMOS outputs rated for ±5.2 mA (IOH/IOL) at VCC = 5 V - insufficient to drive most indicator LEDs (typically requiring 10–20 mA). Direct LED connection risks exceeding output current limits and degrading output voltage levels. A series current-limiting resistor plus external transistor buffer or dedicated LED driver is required for reliable operation with the 74HC377N,652.
74HC377N,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HC
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- 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:
- 83 MHz
- Max Propagation Delay @ V, Max CL:
- 27ns @ 6V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 5.2mA, 5.2mA
- Voltage - Supply:
- 2V ~ 6V
- Current - Quiescent (Iq):
- 8 µA
- Input Capacitance:
- 3.5 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-DIP
74HC377N,652 FAQ
1.How can I place an order for 74HC377N,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC377N,652 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 74HC377N,652 reliable?
The price and inventory of 74HC377N,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC377N,652 is usually 5 days.
3.What payment methods are accepted for 74HC377N,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC377N,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC377N,652?
74HC377N,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC377N,652 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 74HC377N,652?
For technical support, including 74HC377N,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC377N,652 requirements.
6.How does Aetrix verify that 74HC377N,652 is sourced from the original manufacturer or authorized distributors?
All 74HC377N,652 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 74HC377N,652 meets industry standards.
7.What is the process for return or replacement of 74HC377N,652?
All 74HC377N,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC377N,652, 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 74HC377N,652 part is unused and in its original packaging.
Return procedure for 74HC377N,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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