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NXP Semiconductors 74HCT377N,652
- Part No.:
- 74HCT377N,652
- Manufacturer:
- NXP Semiconductors
- Category:
- Flip Flops
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
74HCT377N,652.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,631
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Product details
Overview
74HCT377N,652 from Nexperia is an octal positive-edge-triggered D-type flip-flop with data enable (active LOW), designed for synchronous data latching in digital control and interface logic. It operates at 4.5 V to 5.5 V supply, delivers propagation delay as low as 14 ns (VCC = 5.0 V, CL = 15 pF), supports -40 °C to +125 °C ambient range, and features TTL-compatible input thresholds - used in industrial PLC I/O modules for parallel data capture.
For engineers reviewing the 74HCT377N,652 datasheet, 74HCT377N,652 pinout, 74HCT377N,652 application, or 74HCT377N,652 equivalent, key selection criteria include its single-clock synchronization of eight parallel inputs, guaranteed set-up/hold timing (tsu = 22 ns, th = 3 ns at VCC = 4.5 V), SO20 package compatibility, and direct interoperability with legacy 5 V TTL systems without level translation.
Technical Context
This device implements eight independent D-type latches sharing a common clock (CP) and a global data enable (E) input. All outputs update synchronously on the LOW-to-HIGH transition of CP only when E is LOW - enabling precise gating of parallel data streams without ripple or skew between channels.
Input structure includes clamp diodes for overvoltage tolerance, and output drive capability meets ±4.0 mA at VOH/VOL specifications. Static and dynamic parameters are fully characterized across -40 °C to +125 °C, with input thresholds fixed at VIH = 2.0 V (min), VIL = 0.8 V (max) for TTL-level compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74HCT - TTL-compatible CMOS, ensures direct interfacing with 5 V TTL microcontrollers and peripherals |
| Supply Voltage Range | 4.5 V to 5.5 V - matches standard 5 V system rails; excludes 3.3 V operation |
| Propagation Delay (tpd) | 14 ns typical at VCC = 5.0 V, CL = 15 pF - enables reliable operation up to 53 MHz maximum clock frequency |
| Set-up / Hold Time | tsu = 22 ns / th = 3 ns at VCC = 4.5 V - defines minimum data stability window before and after CP edge |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood automotive control units and industrial motor drives |
| Package | SO20 (SOT163-1), 7.5 mm body width - industry-standard 20-pin small outline, compatible with automated SMT placement |
| Input Thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V - guarantees robust recognition of TTL logic levels without external biasing |
Pinout & Package
74HCT377N,652 is supplied in a plastic small outline package (SO20, SOT163-1) with 20 leads and 7.5 mm body width. Pin 1 is marked by a notch or dot; pin numbering follows standard counter-clockwise sequence from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | E | Data enable input (active LOW); gates all eight flip-flops - when HIGH, outputs hold last state regardless of clock |
| 2–9, 12, 15–16, 19 | Q0–Q7 | Eight complementary D-type latch outputs; each tracks corresponding Dn input on enabled CP edge |
| 3–4, 7–8, 13–14, 17–18 | D0–D7 | Eight asynchronous data inputs; sampled only when E = LOW and CP transitions LOW-to-HIGH |
| 10 | GND | Ground reference (0 V); required for stable logic thresholds and noise immunity |
| 11 | CP | Clock input (edge-triggered); rising edge initiates sampling - must meet minimum pulse width (tW = 20 ns min at VCC = 4.5 V) |
| 20 | VCC | Positive supply (4.5–5.5 V); powers internal CMOS circuitry and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH ≥ 2.0 V and VIL ≤ 0.8 V at VCC = 4.5–5.5 V - eliminates need for level shifters when interfacing with legacy 5 V microcontrollers |
| High noise immunity | Guaranteed 400 mV noise margin at VCC = 5.0 V - suppresses false triggering in electrically noisy industrial environments |
| Wide temperature operation | Specified from -40 °C to +125 °C - supports deployment in engine control units and power converter feedback loops |
| ESD protection | HBM > 2000 V and CDM > 1000 V - enhances reliability during board assembly and field handling |
| Clamp diode inputs | Enables safe interface to signals exceeding VCC using current-limiting resistors - simplifies connection to higher-voltage sensors or buses |
Applications
| Industrial PLC I/O Expansion | Legacy System Data Capture |
|---|---|
Use Scenario: Capturing parallel status bits from 8-channel analog input modules or discrete sensor arrays in programmable logic controllers. IC Role / Device Role / Timing Role: Synchronous latching of eight concurrent digital inputs on a shared clock edge, gated by a processor-controlled enable signal. Use Value: Eliminates metastability risk and ensures deterministic sampling alignment across all channels - critical for time-critical motion control sequences. |
Use Scenario: Interfacing modern microcontrollers with legacy 5 V TTL peripheral cards (e.g., ISA-bus expansion boards) requiring parallel data registration. IC Role / Device Role / Timing Role: Level-transparent D-flip-flop buffer that accepts TTL logic directly while driving CMOS loads with full 5 V swing. Use Value: Removes need for discrete level translators, reducing BOM count and PCB area in retrofitted industrial computing systems. |
| Motor Drive Control Register | Test Equipment Pattern Generator |
Use Scenario: Holding PWM enable/disable states and direction commands for multi-phase inverter gate drivers in servo amplifiers. IC Role / Device Role / Timing Role: Edge-triggered register storing command bits synchronized to a central system clock, with enable controlled by safety interlock logic. Use Value: Ensures atomic update of all motor control bits - prevents partial writes that could cause phase short-circuits or torque glitches. |
Use Scenario: Generating stable, glitch-free stimulus patterns for IC functional testing where multiple DUT inputs must be driven simultaneously. IC Role / Device Role / Timing Role: Parallel pattern latch holding test vector bits until triggered by a master clock pulse from the ATE controller. Use Value: Provides precise setup/hold timing margins (tsu = 22 ns, th = 3 ns) to guarantee clean vector transitions - essential for high-speed digital test coverage. |
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 |
|---|---|---|---|
| 74HCT377PW,118 | TSSOP20 package (4.4 mm width), same electrical specs and pinout - thinner profile, finer pitch (0.65 mm) | Better suited for space-constrained portable or high-density PCBs; requires reflow profile adjustment for fine-pitch soldering | Select when board real estate is limited and automated assembly supports TSSOP; not drop-in for SO20 footprints |
| SN74HCT377N | Same SO20 package and pinout; TI-specified VIH/VIL (2.0 V/0.8 V) and tpd (17 ns @ 4.5 V) match closely but max fmax = 48 MHz vs 53 MHz | Valid for cost-sensitive industrial designs where 5 MHz clock headroom is acceptable | Use when dual-sourcing is required and TI's qualification documentation is mandated by customer procurement policy |
Compared with 74HCT377N,652, the TSSOP variant offers footprint reduction at the cost of assembly complexity, while the TI part provides second-source assurance with minor timing trade-offs - both require validation of thermal performance and layout parasitics in high-reliability applications.
Availability
74HCT377N,652 is available at Aetrix Electronics and suitable for industrial automation, motor control, and legacy system integration requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for 74HCT377N,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
Nexperia is a global semiconductor expert delivering high-performance logic, analog, and MOSFET solutions optimized for efficiency, reliability, and manufacturability in high-volume applications.
The 74HCT series targets industrial and automotive-grade digital interface functions, emphasizing robustness across extended temperature ranges and seamless interoperability with legacy 5 V TTL systems.
FAQ
What is the maximum clock frequency supported by the 74HCT377N,652?
The 74HCT377N,652 supports a maximum clock frequency of 53 MHz under recommended conditions (VCC = 5.0 V, CL = 15 pF). This value is derived from measured propagation delay (tpd = 14 ns typical) and accounts for setup/hold timing margins. At VCC = 4.5 V, fmax drops to 48 MHz due to slower switching characteristics.
Does the 74HCT377N,652 support 3.3 V logic interfaces?
No, the 74HCT377N,652 does not support 3.3 V logic interfaces. Its input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and recommended supply range (4.5 V to 5.5 V) are strictly defined for 5 V TTL compatibility. Using it with 3.3 V signals risks unreliable recognition of HIGH states and violates recommended operating conditions.
How does the data enable (E) pin function in the 74HCT377N,652?
In the 74HCT377N,652, the E pin is an active-LOW enable that controls whether the flip-flops sample Dn inputs on the CP rising edge. When E = LOW, outputs Qn update to match Dn; when E = HIGH, Qn retain their previous state regardless of CP activity - providing synchronous hold functionality without requiring separate reset lines.
What package type is used for the 74HCT377N,652?
The 74HCT377N,652 uses the SO20 plastic small outline package (SOT163-1), featuring 20 leads, 7.5 mm body width, and standard 1.27 mm lead pitch. This package is compatible with conventional SMT reflow processes and widely supported in industrial PCB assembly lines.
Is the 74HCT377N,652 qualified for automotive applications?
The 74HCT377N,652 is not automotive-qualified. Although it is specified from -40 °C to +125 °C, Nexperia explicitly states in its legal disclaimers that non-automotive-qualified products like the 74HCT377N,652 are not tested or warranted for automotive use - including AEC-Q100 stress testing or failure-in-time (FIT) reporting.
74HCT377N,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HCT
- 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:
- 53 MHz
- Max Propagation Delay @ V, Max CL:
- 32ns @ 4.5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 4mA, 5.2mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- 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
74HCT377N,652 FAQ
1.How can I place an order for 74HCT377N,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT377N,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 74HCT377N,652 reliable?
The price and inventory of 74HCT377N,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT377N,652 is usually 5 days.
3.What payment methods are accepted for 74HCT377N,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT377N,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT377N,652?
74HCT377N,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT377N,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 74HCT377N,652?
For technical support, including 74HCT377N,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT377N,652 requirements.
6.How does Aetrix verify that 74HCT377N,652 is sourced from the original manufacturer or authorized distributors?
All 74HCT377N,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 74HCT377N,652 meets industry standards.
7.What is the process for return or replacement of 74HCT377N,652?
All 74HCT377N,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT377N,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 74HCT377N,652 part is unused and in its original packaging.
Return procedure for 74HCT377N,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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