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NXP Semiconductors 74HCT377PW,112
- Part No.:
- 74HCT377PW,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74HCT377PW,112.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
74HCT377PW,112 from Nexperia is an octal positive-edge-triggered D-type flip-flop with data enable (E), designed for synchronous data latching in digital logic systems. It operates at 4.5 V to 5.5 V, delivers propagation delay as low as 14 ns (typ.) at 5.0 V/15 pF, and supports industrial temperature range (−40 °C to +125 °C) in TSSOP20 package. Used in address/data register staging, bus interface control, and state-holding circuits.
For engineers reviewing the 74HCT377PW,112 datasheet, 74HCT377PW,112 pinout, 74HCT377PW,112 application, or 74HCT377PW,112 equivalent, key selection factors include TTL-compatible input thresholds, 8-bit parallel edge-triggered storage, data enable gating behavior, and TSSOP20 thermal performance under sustained 5 V operation.
Technical Context
This device implements eight independent D-type flip-flops sharing a common clock (CP) and a single active-low data enable (E). When E is LOW, each Qn output captures the corresponding Dn input on the LOW-to-HIGH CP transition; when E is HIGH, outputs retain their prior state regardless of CP or Dn activity.
Input thresholds are TTL-compatible (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V), ensuring interoperability with legacy 5 V logic families. The internal structure includes clamp diodes on all inputs, enabling safe interfacing to voltages exceeding VCC when used with current-limiting resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74HCT - TTL-compatible inputs, CMOS outputs; enables direct connection to 5 V microcontrollers and legacy logic without level shifters. |
| Supply Voltage Range | 4.5 V to 5.5 V - matches standard 5 V system rails; not rated below 4.5 V unlike HC variants. |
| Propagation Delay (tpd) | 14 ns (typ.) at VCC = 5.0 V, CL = 15 pF - ensures reliable timing in high-speed control registers up to ~53 MHz fmax. |
| Set-up Time (tsu) | 12 ns (typ.) for Dn/E to CP - defines minimum data stability window before clock edge for deterministic capture. |
| Output Drive | ±4.0 mA (VOH/VOL) at VCC = 4.5 V - sufficient to drive 10 LS-TTL loads or multiple CMOS inputs in fan-out-critical paths. |
| Operating Temperature | −40 °C to +125 °C - qualified for under-hood industrial and extended-temperature embedded applications. |
| Power Dissipation | CPD = 20 pF - enables accurate dynamic power estimation (PD = CPD × VCC² × fi) for thermal budgeting in dense PCB layouts. |
Pinout & Package
TSSOP20 (SOT360-1) package: 20-pin thin shrink small outline, 4.4 mm body width, 0.65 mm pitch, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (E) | Data enable input | Active-LOW global gate: disables all flip-flop updates when HIGH; requires stable state ≥12 ns before CP rising edge. |
| 2–9, 12, 15–16, 19 (Q0–Q7) | Flip-flop outputs | Eight buffered, non-inverted latched outputs; each drives independently with CMOS-level swing and ±4 mA capability. |
| 3–4, 7–8, 13–14, 17–18 (D0–D7) | Data inputs | Eight asynchronous D inputs; sampled only when E = LOW and CP rises - no internal latching outside clock event. |
| 10 (GND) | Ground reference | Primary 0 V return path for all I/O and supply currents; must be low-impedance for noise immunity and timing integrity. |
| 11 (CP) | Clock input | Single-edge-sensitive input: triggers simultaneous sampling of all enabled D inputs on LOW-to-HIGH transition only. |
| 20 (VCC) | Supply voltage | 5 V nominal power rail; decoupling capacitor (100 nF) required within 5 mm of pin for stable switching performance. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible input thresholds | VIH = 2.0 V min, VIL = 0.8 V max at 5 V - eliminates need for external level translators when interfacing with 74LS, 74F, or microcontroller GPIOs. |
| Common clock + master enable architecture | One CP and one E control all eight flip-flops - simplifies timing control in parallel data paths like address latches or status registers. |
| Clamp diode protected inputs | Enables safe overvoltage tolerance (VI > VCC) using series current-limiting resistors - useful in mixed-voltage board interfaces. |
| High noise immunity | Typical noise margin >1.2 V at VCC = 5 V - maintains robust operation in electrically noisy industrial environments. |
| ESD robustness | HBM >2000 V, CDM >1000 V - reduces handling sensitivity and improves field reliability without additional protection circuitry. |
Applications
| Microcontroller Address Latching | Industrial Bus Interface Buffering |
|---|---|
Use Scenario: Holding 8-bit address segments during multiplexed bus cycles in 8051 or AVR-based controllers. IC Role / Device Role / Timing Role: Acts as transparent edge-triggered latch synchronizing external memory or peripheral address lines to CPU clock domain. Use Value: Eliminates address glitches during ALE transitions; supports ≤53 MHz bus timing with 14 ns tpd and 12 ns tsu margins. | Use Scenario: Isolating and registering sensor data streams before transmission over RS-485 or CAN physical layers. IC Role / Device Role / Timing Role: Captures parallel 8-bit ADC or encoder outputs on system clock edge, then presents stable data to serial interface logic. Use Value: Prevents metastability in downstream UART/CAN TX logic by providing clean, synchronized parallel-to-serial handoff. |
| Programmable Logic State Register | Test Equipment Pattern Generator |
Use Scenario: Storing configuration bits for CPLD/FPGA I/O banks or analog switch matrices in automated test fixtures. IC Role / Device Role / Timing Role: Provides non-volatile (until next clock) 8-bit state storage controlled by test sequencer's enable and clock signals. Use Value: Enables precise, repeatable stimulus setup with sub-20 ns timing resolution and guaranteed hold time across −40 °C to +125 °C. | Use Scenario: Generating fixed or variable-width digital pulse trains for IC functional validation and timing margin testing. IC Role / Device Role / Timing Role: Holds pattern words in shift-register-like fashion, updated per test step via E/CP coordination. Use Value: Delivers deterministic, jitter-free waveform edges with <19 ns transition time and <48 ns max tpd across full temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type flip-flop with data enable applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT377D,653 | SO20 package (7.5 mm width); higher thermal resistance (12.3 mW/K derating above 109 °C vs. 10.0 mW/K for TSSOP20). | Better suited for through-hole prototyping or legacy PCBs with SOIC footprints; lower pin density than TSSOP. | Select when board layout uses SOIC-20 land pattern or requires higher mechanical robustness in vibration-prone environments. |
| SN74HCT377N | PDIP-20 package; wider body (6.35 mm), larger footprint; identical electrical specs but higher parasitic capacitance (~25 pF vs. ~3.5 pF CI). | Used in educational labs, breadboard development, or legacy repair where DIP sockets are mandatory. | Choose only for hand-soldered prototypes or replacement in existing DIP-based systems - not recommended for new high-speed designs. |
Compared with 74HCT377D and SN74HCT377N, the 74HCT377PW,112 offers superior thermal performance in space-constrained layouts, lower input capacitance for faster edge rates, and compatibility with modern fine-pitch SMT assembly - making it optimal for production-grade industrial controllers and compact test equipment.
Availability
74HCT377PW,112 is available at Aetrix Electronics and suitable for industrial automation controllers, automotive diagnostic tools, and programmable logic interface modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HCT377PW,112 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 leading Dutch semiconductor manufacturer specializing in high-performance logic, discrete, and MOSFET solutions, with emphasis on reliability, efficiency, and automotive-grade qualification.
The 74HCT series targets industrial and consumer systems needing TTL-compatible 5 V logic interoperability, offering robust noise immunity, wide operating margins, and proven longevity in mission-critical control applications.
FAQ
What is the minimum recommended VCC for reliable operation of the 74HCT377PW,112?
The 74HCT377PW,112 is specified for 4.5 V to 5.5 V operation per its recommended conditions table. Operation below 4.5 V is not guaranteed: VIH drops to 1.6 V min at 4.5 V, but falls outside TTL compatibility at lower voltages, risking incorrect input recognition and metastable behavior. Always maintain VCC ≥ 4.5 V for compliant functionality.
Can the 74HCT377PW,112 be used with a 3.3 V microcontroller without level shifting?
No - the 74HCT377PW,112 requires 4.5–5.5 V VCC and has TTL-level inputs (VIH ≥ 2.0 V), but its outputs swing rail-to-rail (0 V to VCC). Driving a 3.3 V MCU input directly risks overvoltage damage. Use a dedicated level translator (e.g., TXB0108) or select a 74LVC377 variant for true 3.3 V compatibility.
How does the data enable (E) pin behave during partial updates?
When E is HIGH, all Q outputs hold their last latched state regardless of Dn or CP activity - no flip-flop updates occur. When E goes LOW, subsequent CP rising edges sample *all* Dn inputs simultaneously. There is no selective or individual enable per bit; E is a global gate controlling the entire octal register.
Is the 74HCT377PW,112 qualified for automotive applications?
No - this part is specified for industrial temperature range (−40 °C to +125 °C) but is not AEC-Q100 qualified. Nexperia explicitly states in its legal disclaimers that non-automotive-qualified products are unsuitable for safety-critical or life-support systems. For automotive use, specify AEC-Q100 grade parts such as 74HCT377PW-Q100.
74HCT377PW,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HCT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74HCT377PW,112 FAQ
1.How can I place an order for 74HCT377PW,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT377PW,112 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 74HCT377PW,112 reliable?
The price and inventory of 74HCT377PW,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT377PW,112 is usually 5 days.
3.What payment methods are accepted for 74HCT377PW,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT377PW,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT377PW,112?
74HCT377PW,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT377PW,112 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 74HCT377PW,112?
For technical support, including 74HCT377PW,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT377PW,112 requirements.
6.How does Aetrix verify that 74HCT377PW,112 is sourced from the original manufacturer or authorized distributors?
All 74HCT377PW,112 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 74HCT377PW,112 meets industry standards.
7.What is the process for return or replacement of 74HCT377PW,112?
All 74HCT377PW,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT377PW,112, 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 74HCT377PW,112 part is unused and in its original packaging.
Return procedure for 74HCT377PW,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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