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

Nexperia USA Inc. 74HCT377D,653

Name: 74HCT377D,653
Brand: Nexperia USA Inc.
SKU: 74HCT377D,653
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74HCT377D,653

Manufacturer:: Nexperia USA Inc.

Category:: Flip Flops

Package:: 20-SOIC (0.295", 7.50mm Width)

Datasheet:: 74HCT377D,653.pdf

Description:: IC FF D-TYPE SNGL 8BIT 20SO

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Product details

Overview

74HCT377D,653 from Nexperia is an octal positive-edge-triggered D-type flip-flop with data enable (E), designed for synchronous data latching in digital control and interface logic. It operates from 4.5 V to 5.5 V, delivers 8-bit parallel output (Q0–Q7), supports −40 °C to +125 °C industrial temperature range, and features TTL-compatible inputs for direct interfacing with legacy logic families. It is used in microcontroller I/O expansion, address/data bus registration, and programmable logic control modules.

For engineers reviewing the 74HCT377D,653 datasheet, 74HCT377D,653 pinout, 74HCT377D,653 application, or 74HCT377D,653 equivalent, key selection criteria include its TTL-level input compatibility, 17 ns typical propagation delay at 4.5 V, 22 ns maximum t_su (data setup time), SO20 package footprint, and guaranteed operation across extended temperature range without derating.

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; when E is HIGH, outputs hold their previous state regardless of clock transitions.

The architecture includes input clamp diodes enabling safe interfacing with voltages exceeding V_CC, CMOS output stages with ±4.0 mA drive capability at V_CC = 4.5 V, and TTL-level input thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V) ensuring robust noise immunity in mixed-logic systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Family	74HCT - TTL-compatible input levels, CMOS output drive
Supply Voltage Range	4.5 V to 5.5 V - Ensures compatibility with 5 V systems and tolerance to rail variation
Propagation Delay (t_pd)	17 ns typ. (CP to Q_n, V_CC = 4.5 V, C_L = 50 pF) - Enables reliable operation up to 27 MHz clock frequency
Set-up Time (t_su)	22 ns max. (D_n/E to CP, V_CC = 4.5 V) - Defines minimum data stability window before clock edge
Output Drive	±4.0 mA (V_OH ≥ 3.98 V, V_OL ≤ 0.26 V at I_O = ±4.0 mA) - Sufficient to drive standard TTL loads or multiple 74HCT inputs
Operating Temperature	−40 °C to +125 °C - Qualified for industrial and under-hood automotive auxiliary applications
Input Clamp Diodes	Integrated - Allows use of current-limiting resistors for overvoltage-tolerant input interfacing

Pinout & Package

74HCT377D,653 is housed 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; the package is lead-free and RoHS-compliant.

Pin/Terminal	Circuit Role	Design Meaning
1	E	Active-low data enable - Controls whether D_n inputs are sampled on clock edge
2, 5, 6, 9, 12, 15, 16, 19	Q0–Q7	Flip-flop outputs - Latched D_n states, high-drive CMOS outputs
3, 4, 7, 8, 13, 14, 17, 18	D0–D7	Data inputs - Sampled only when E = LOW and CP rises
10	GND	Ground reference - Return path for all internal logic and I/O currents
11	CP	Positive-edge clock - Triggers sampling of D_n and update of Q_n on LOW-to-HIGH transition
20	V_CC	Supply voltage - Powers internal logic and output drivers (4.5–5.5 V)

Key Features

Feature	Design Value
TTL-compatible inputs	V_IH = 2.0 V min., V_IL = 0.8 V max. - Direct interface with 5 V TTL without level shifters
Wide operating temperature	−40 °C to +125 °C - Supports deployment in harsh industrial environments
Low dynamic power	C_PD = 20 pF - Limits switching power dissipation in high-frequency operation
ESD protection	HBM > 2000 V, CDM > 1000 V - Robust handling during board assembly and field service
Input clamp diodes	Integrated - Enables safe connection to signals up to V_CC + 0.5 V using series resistors

Applications

Microcontroller I/O Expansion

Industrial Bus Registration

Use Scenario: Adding parallel GPIO to an MCU with limited native I/O pins, such as in PLC I/O modules or sensor concentrators.

IC Role / Device Role / Timing Role: Acts as an 8-bit synchronous latch, capturing parallel sensor or actuator data on a shared clock edge aligned with MCU timing.

Use Value: Enables deterministic, glitch-free data capture synchronized to system clock, eliminating metastability risks from asynchronous inputs.

Use Scenario: Capturing address or data bus values in industrial communication interfaces (e.g., Modbus RTU register reads).

IC Role / Device Role / Timing Role: Registers bus content at precise clock edges under control of a master controller's enable signal.

Use Value: Provides clean, synchronized snapshot of transient bus states, improving reliability in noisy factory-floor environments.

Programmable Logic Control

Digital Test Equipment Interface

Use Scenario: Storing configuration bits or status flags in FPGA/CPLD-based control sequencers where deterministic state capture is required.

IC Role / Device Role / Timing Role: Functions as a static register bank, holding control words until updated by a new clock pulse.

Use Value: Delivers predictable, edge-triggered storage with no internal feedback paths-critical for safety-critical sequencing logic.

Use Scenario: Capturing stimulus/response data streams in automated test equipment (ATE) for digital IC validation.

IC Role / Device Role / Timing Role: Latches parallel test vectors or measurement results under precise timing control from pattern generator clocks.

Use Value: Guarantees sub-25 ns timing margins between data valid and clock edge, meeting ATE synchronization requirements.

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	CMOS-level inputs (V_IH = 3.15 V @ V_CC = 4.5 V); wider 2.0–6.0 V supply range	Better suited for mixed-voltage systems (e.g., 3.3 V logic driving 5 V bus)	Select when interfacing with CMOS or mixed-supply logic; avoid if driving directly from TTL sources
SN74HCT377N	DIP-20 package; identical electrical specs but through-hole mounting and different thermal profile	Preferred for prototyping, legacy PCBs, or manual assembly where SOIC is unsuitable	Choose for breadboarding, repair, or designs requiring through-hole components

Compared with 74HC377D,653 and SN74HCT377N, the 74HCT377D,653 uniquely balances TTL input compatibility, SO20 surface-mount form factor, and extended temperature operation-making it optimal for space-constrained industrial controllers where legacy logic interfacing is required.

Availability

74HCT377D,653 is available at Aetrix Electronics and suitable for industrial automation, programmable logic control, and embedded I/O expansion requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT377D,653 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 focused on high-volume, high-reliability logic, discrete, and MOSFET solutions, serving industrial, automotive, and consumer markets with scalable manufacturing and rigorous quality standards.

The 74HCT377 belongs to Nexperia's 74HCT logic family, engineered specifically for seamless integration between legacy TTL systems and modern CMOS-based controllers-emphasizing input compatibility, noise immunity, and extended temperature resilience.

FAQ

What is the function of the E (Enable) pin on the 74HCT377D,653?

The E pin is an active-low data enable input. When E is LOW, the Q_n outputs update to match the D_n inputs on the next rising edge of CP. When E is HIGH, all Q_n outputs retain their current state regardless of CP transitions or D_n changes. This enables selective latching without requiring individual flip-flop gating.

Can the 74HCT377D,653 operate at 3.3 V supply?

No. The 74HCT377D,653 is specified only for 4.5 V to 5.5 V operation. Its TTL-compatible input thresholds (V_IH ≥ 2.0 V, V_IL ≤ 0.8 V) and output drive characteristics are validated within this range. At 3.3 V, VIH would exceed 2.0 V, risking unreliable recognition of HIGH inputs and violating recommended operating conditions.

Is there a reset or clear function on this device?

No. The 74HCT377D,653 does not include asynchronous or synchronous reset/clear functionality. It relies solely on the clock and enable inputs for state control. To initialize outputs, apply known D_n values while asserting E and pulsing CP, or use external reset circuitry on the D inputs prior to first clock cycle.

How does the SO20 (SOT163-1) package compare thermally to TSSOP20?

The SO20 package (SOT163-1) has a higher thermal resistance than TSSOP20: total power dissipation derates linearly at 12.3 mW/K above 109 °C, versus 10.0 mW/K above 100 °C for TSSOP20. At full 500 mW P_tot, SO20 allows higher ambient temperature before derating begins, making it preferable in convection-cooled industrial enclosures where airflow is limited.

74HCT377D,653 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: 74HCT

Package/Case:: 20-SOIC (0.295", 7.50mm Width)

Packaging:: Tape & Reel (TR)

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-SO

74HCT377D,653 FAQ

1.How can I place an order for 74HCT377D,653 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74HCT377D,653 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 74HCT377D,653 reliable?

The price and inventory of 74HCT377D,653 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT377D,653 is usually 5 days.

3.What payment methods are accepted for 74HCT377D,653?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT377D,653 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74HCT377D,653?

74HCT377D,653 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74HCT377D,653 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 74HCT377D,653?

For technical support, including 74HCT377D,653 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT377D,653 requirements.

6.How does Aetrix verify that 74HCT377D,653 is sourced from the original manufacturer or authorized distributors?

All 74HCT377D,653 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 74HCT377D,653 meets industry standards.

7.What is the process for return or replacement of 74HCT377D,653?

All 74HCT377D,653 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT377D,653, 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 74HCT377D,653 part is unused and in its original packaging.

Return procedure for 74HCT377D,653:

1.Submit a request within 90 days.

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

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