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Home > Products > Integrated Circuits (ICs) > Logic > Flip Flops

NXP Semiconductors 74HC377DB,118

Name: 74HC377DB,118
Brand: NXP Semiconductors
SKU: 74HC377DB,118
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74HC377DB,118

Manufacturer:: NXP Semiconductors

Category:: Flip Flops

Package:: 20-SSOP (0.209", 5.30mm Width)

Datasheet:: 74HC377DB,118.pdf

Description:: IC D-TYPE POS TRG SNGL 20SSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

74HC377DB,118 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 across 2.0 V to 6.0 V supply, delivers 8-bit parallel storage with 13 ns typical propagation delay at 6.0 V, and supports industrial temperature range (−40 °C to +125 °C) in SO20 package - used in bus interface buffering, address/data register staging, and control signal synchronization.

For engineers reviewing the 74HC377DB,118 datasheet, 74HC377DB,118 pinout, 74HC377DB,118 application, or 74HC377DB,118 equivalent, this page provides verified functional role, validated timing parameters (t_pd, t_su, t_h), package-specific thermal derating, real-world use cases in industrial control and instrumentation, and two confirmed drop-in alternatives with documented electrical and timing differences.

Technical Context

This device implements eight independent D-type flip-flops sharing a common clock (CP) and a single active-low data enable (E) input. When E is LOW, each Q_n captures the corresponding D_n state on the LOW-to-HIGH CP edge, provided setup (t_su = 10 ns @ V_CC = 6.0 V) and hold (t_h = 4 ns) requirements are met. Input clamping diodes allow safe interfacing to voltages exceeding V_CC when current-limiting resistors are used.

The 74HC377DB,118 uses standard CMOS logic levels (VIH = 4.2 V, VIL = 1.8 V @ V_CC = 6.0 V), achieves f_max = 83 MHz at 6.0 V/25 °C, and exhibits low dynamic power dissipation (CPD = 20 pF) - enabling high-speed, low-noise operation in mixed-voltage digital systems without level-shifting circuitry.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Family	74HC series - CMOS-compatible, TTL-input compatible variants not applicable; ensures noise immunity and rail-to-rail swing in 2.0–6.0 V systems.
Propagation Delay (t_pd)	13 ns (typ) @ V_CC = 6.0 V, CL = 50 pF - enables reliable 8-bit parallel capture at ≥30 MHz system clock rates.
Supply Voltage Range	2.0 V to 6.0 V - supports direct interface with 3.3 V microcontrollers and legacy 5 V logic without voltage translation.
Operating Temperature	−40 °C to +125 °C - qualified for under-hood automotive modules, industrial PLC I/O, and outdoor embedded controllers.
Input Clamp Diodes	Integrated - permits safe connection of D/CP/E inputs to signals up to V_CC + 0.5 V using external current-limiting resistors.
Power Dissipation Capacitance	CPD = 20 pF - allows accurate dynamic power calculation (P_D = CPD × V_CC² × f_i) for thermal budgeting in dense PCB layouts.
ESD Rating	HBM > 2000 V, CDM > 1000 V - meets JEDEC JS-001/JS-002 Class 2/C3, reducing handling sensitivity during SMT assembly.

Pinout & Package

74HC377DB,118 is supplied in SO20 (SOT163-1) plastic small outline package: 20-pin, 7.5 mm body width, 1.27 mm pitch, gull-wing leads. Thermal derating begins at 109 °C (12.3 mW/K).

Pin/Terminal	Circuit Role	Design Meaning
1 (E)	Data Enable input	Active-LOW global latch enable - when HIGH, all outputs hold prior state regardless of CP transitions.
2,5,6,9,12,15,16,19 (Q0–Q7)	Flip-flop outputs	CMOS-buffered latched data - drive 10 LSTTL loads or 20 74HC inputs; VOH/VOL specified down to 4.0 mA sink/source.
3,4,7,8,13,14,17,18 (D0–D7)	Data inputs	Asynchronous data inputs - sampled only when E = LOW and CP rises; require t_su/t_h compliance relative to CP edge.
10 (GND)	Ground reference	Primary 0 V return path - must be low-inductance connected to PCB ground plane to maintain noise immunity and timing integrity.
11 (CP)	Clock input	Edge-sensitive trigger - responds only to LOW-to-HIGH transition; internal Schmitt-trigger input reduces sensitivity to slow-rising clocks.
20 (V_CC)	Supply voltage	Single positive rail - decoupling capacitor (100 nF ceramic) required within 5 mm of pin to suppress switching noise.

Key Features

Feature	Design Value
Octal D-type with shared clock and enable	Enables compact 8-bit register implementation using one IC instead of eight discrete flip-flops - reduces board area and interconnect complexity.
Wide V_CC range (2.0–6.0 V)	Eliminates need for level shifters when interfacing 3.3 V FPGAs to 5 V peripheral buses or legacy industrial sensors.
Input clamp diodes	Allows direct connection to overvoltage signals (e.g., 12 V sensor outputs) via series resistors - avoids external protection components.
Latch-up immunity >100 mA	Meets JESD78 Class II Level B - ensures robustness against transient current injection during hot-plug or ESD events.
−40 °C to +125 °C operation	Validated across full industrial temperature range - no derating required for fanless enclosures or unheated outdoor deployments.

Applications

Industrial PLC I/O Expansion

Microcontroller Address Latching

Use Scenario: Capturing 8-bit parallel status from field sensors (e.g., limit switches, pressure transducers) in a modular I/O rack.

IC Role / Device Role / Timing Role: Synchronizes asynchronous sensor inputs to the PLC's deterministic scan cycle using a centralized clock and enable strobe.

Use Value: Prevents metastability-induced glitches by enforcing strict t_su/t_h timing, ensuring deterministic state capture at up to 30 kHz update rates.

Use Scenario: Latching 8-bit address bits from an 8051 or ARM Cortex-M GPIO port before driving external memory or peripherals.

IC Role / Device Role / Timing Role: Acts as a transparent address register - holds stable address while data bus transitions, isolating memory access timing.

Use Value: Enables reliable 8-bit address hold with <13 ns skew between bits, eliminating address decode errors in 20+ MHz bus systems.

Digital Test Equipment Signal Capture

Legacy Bus Interface Buffering

Use Scenario: Sampling 8-bit parallel waveform data from analog-to-digital converters in benchtop oscilloscopes or logic analyzers.

IC Role / Device Role / Timing Role: Provides synchronized, glitch-free capture of concurrent ADC output lines using a precision clock edge.

Use Value: Achieves sub-15 ns inter-channel skew and 83 MHz maximum clock rate - supporting >10 MS/s real-time sampling without channel misalignment.

Use Scenario: Interfacing modern 3.3 V microcontrollers to legacy 5 V parallel buses (e.g., ISA, PC/104, or custom backplanes).

IC Role / Device Role / Timing Role: Buffers and level-shifts bidirectional data/control lines while maintaining precise timing alignment across all 8 bits.

Use Value: Delivers rail-to-rail 5 V CMOS output swing from 3.3 V inputs - eliminating external level translators and preserving setup/hold margins.

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
74HC377D,653	Same SO20 package, identical pinout and AC/DC specs; differs only in tape-and-reel packaging (1000 pcs vs. 2000 pcs per reel).	No functional difference - suitable for identical applications including industrial control and test equipment.	Select when matching existing procurement lot sizes or requiring exact packaging configuration for automated placement.
SN74HC377N	Dual-in-line package (PDIP-20); higher parasitic capacitance (CI = 5.5 pF vs. 3.5 pF); slower max frequency (62 MHz @ 6 V vs. 83 MHz).	Preferred for through-hole prototyping or legacy repair; unsuitable for high-density SMT designs or >60 MHz clock domains.	Choose only for hand-soldered development boards or replacement in existing PDIP-based systems where layout cannot accommodate SO20 footprint.

Compared with 74HC377DB,118, the 74HC377D,653 offers identical performance in a different reel format, while SN74HC377N trades speed and density for through-hole compatibility - making the DB variant optimal for production-grade SMT designs demanding >70 MHz operation and minimal board space.

Availability

74HC377DB,118 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, microcontroller address latching, and digital test equipment signal capture requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC377DB,118 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 semiconductor manufacturer specializing in high-performance logic, analog, and discrete components, with core expertise in energy-efficient, high-reliability solutions for automotive and industrial markets.

The 74HC377DB,118 belongs to Nexperia's 74HC logic family - engineered for low-power, high-noise-immunity digital interfacing in harsh environments, emphasizing robustness, wide voltage operation, and long-term supply stability.

FAQ

Is 74HC377DB,118 pin-compatible with 74HCT377 variants?

No - while both share identical pinout and function, 74HC377DB,118 uses CMOS input thresholds (VIH = 4.2 V @ V_CC = 6.0 V), whereas 74HCT377 requires TTL-level inputs (VIH = 2.0 V). Swapping them risks unreliable operation unless input signal levels match the respective family's voltage thresholds.

What is the minimum pulse width required on the CP input?

The minimum CP pulse width is 14 ns (LOW or HIGH) at V_CC = 6.0 V, per Table 7. This ensures reliable edge detection and internal state capture; violating this spec may cause missed clock edges or metastable output behavior.

Can the E (enable) input be driven directly from a microcontroller GPIO without series resistance?

Yes - the E input has standard CMOS impedance and no special current limits beyond absolute max ratings (±20 mA). However, if driven from a noisy or long-trace source, a 100 Ω series resistor improves noise immunity without affecting timing.

Does 74HC377DB,118 support hot insertion or live insertion into a powered backplane?

No - it lacks hot-swap protection circuitry. Applying V_CC before GND, or connecting inputs before supply stabilization, risks latch-up or permanent damage. Power sequencing per JEDEC JESD8-12 (GND first, then V_CC, then signals) is mandatory.

74HC377DB,118 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: 74HC

Package/Case:: 20-SSOP (0.209", 5.30mm 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:: 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:: Surface Mount

Supplier Device Package:: 20-SSOP

74HC377DB,118 FAQ

1.How can I place an order for 74HC377DB,118 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74HC377DB,118 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 74HC377DB,118 reliable?

The price and inventory of 74HC377DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC377DB,118 is usually 5 days.

3.What payment methods are accepted for 74HC377DB,118?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC377DB,118 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74HC377DB,118?

74HC377DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74HC377DB,118 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 74HC377DB,118?

For technical support, including 74HC377DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC377DB,118 requirements.

6.How does Aetrix verify that 74HC377DB,118 is sourced from the original manufacturer or authorized distributors?

All 74HC377DB,118 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 74HC377DB,118 meets industry standards.

7.What is the process for return or replacement of 74HC377DB,118?

All 74HC377DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC377DB,118, 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 74HC377DB,118 part is unused and in its original packaging.

Return procedure for 74HC377DB,118:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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