MC74HCT74ADG

Product Overview

• Category: Integrated Circuit (IC)
• Use: Flip-Flop
• Characteristics: High-Speed, CMOS Logic, Dual D-Type Positive-Edge-Triggered Flip-Flop
• Package: SOIC-14
• Essence: The MC74HCT74ADG is a dual D-type flip-flop with positive-edge triggering. It is part of the HCT family of high-speed CMOS logic ICs.
• Packaging/Quantity: The MC74HCT74ADG is typically sold in reels or tubes containing 250 units.

Specifications

• Logic Family: HCT
• Number of Flip-Flops: 2
• Trigger Type: Positive Edge
• Clock Frequency: Up to 25 MHz
• Supply Voltage Range: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay: 13 ns (max)
• Output Current: ±4 mA
• Input Capacitance: 3 pF (typ)

Pin Configuration

The MC74HCT74ADG has a total of 14 pins arranged as follows:

+---+--+---+ Q1 |1 +--+ 14| VCC Q2 |2 13| CLR D1 |3 12| CLK D2 |4 11| PR GND |5 10| PRE CP |6 9| Q2 R1 |7 8| Q1 +----------+

Functional Features

• Dual D-Type Flip-Flop: The MC74HCT74ADG consists of two independent D-type flip-flops, allowing for the storage and transfer of binary data.
• Positive Edge Triggering: The flip-flop is triggered by a positive edge transition of the clock signal.
• Asynchronous Clear (CLR) Input: The CLR input allows for the immediate reset of the flip-flop to its initial state.
• Clock Enable (CP) Input: The CP input enables or disables the clock signal, controlling the operation of the flip-flop.
• Set (PR) and Reset (PRE) Inputs: The PR and PRE inputs allow for setting or resetting the flip-flop asynchronously.

Advantages and Disadvantages

Advantages: - High-Speed Operation: The MC74HCT74ADG operates at high clock frequencies, making it suitable for applications requiring fast data storage and transfer. - CMOS Logic: The use of CMOS technology provides low power consumption and improved noise immunity. - Dual Flip-Flop: The presence of two independent flip-flops in a single package offers space-saving benefits.

Disadvantages: - Limited Voltage Range: The MC74HCT74ADG operates within a specific voltage range (4.5V to 5.5V), which may limit its compatibility with certain systems. - Propagation Delay: The propagation delay of 13 ns (max) may introduce timing issues in applications that require precise synchronization.

Working Principles

The MC74HCT74ADG functions as a dual D-type flip-flop with positive-edge triggering. When the clock signal transitions from low to high (positive edge), the data present at the D1 and D2 inputs are transferred to the Q1 and Q2 outputs, respectively. The flip-flop can be cleared asynchronously using the CLR input, and the clock enable (CP) input controls the operation of the flip-flop.

Detailed Application Field Plans

The MC74HCT74ADG is commonly used in various digital systems and applications, including:

1. Data Storage: The flip-flop can be utilized to store binary data in microcontrollers, memory modules, and registers.
2. State Machines: It is suitable for implementing state machines and sequential logic circuits in digital systems.
3. Clock Division: The MC74HCT74ADG can be employed to divide the frequency of a clock signal by two.

Detailed and Complete Alternative Models

• SN74HCT74: This is a similar dual D-type flip-flop offered by Texas Instruments. It has comparable specifications and pin configuration to the MC74HCT74ADG.
• CD4013B: This is a CMOS dual D-type flip-flop manufactured by ON Semiconductor. It operates at a wider voltage range and offers additional features like Schmitt-trigger inputs.

These alternative models can be considered based on specific requirements and availability.

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