CD74HCT74M

Product Overview

• Category: Integrated Circuit (IC)
• Use: Digital Logic Flip-Flop
• Characteristics: High-Speed, TTL-Compatible, Dual D-Type Positive-Edge-Triggered Flip-Flop
• Package: 14-Pin SOIC (Small Outline Integrated Circuit)
• Essence: The CD74HCT74M is a dual D-type flip-flop that operates at high speeds and is compatible with TTL logic levels.
• Packaging/Quantity: Available in reels of 2500 units or tubes of 50 units.

Specifications

• Supply Voltage: 2V to 6V
• High-Level Input Voltage: 2V
• Low-Level Input Voltage: 0.8V
• High-Level Output Voltage: 4.4V
• Low-Level Output Voltage: 0.5V
• Propagation Delay Time: 15ns (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The CD74HCT74M has a total of 14 pins arranged as follows:

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

Functional Features

• Dual D-Type Flip-Flop: The CD74HCT74M consists of two independent D-type flip-flops, allowing for the storage and transfer of binary data.
• Positive-Edge Triggered: The flip-flop is triggered by the rising edge of the clock signal, ensuring accurate data capture.
• TTL-Compatible: The CD74HCT74M is designed to be compatible with TTL logic levels, making it suitable for use in mixed logic systems.
• High-Speed Operation: With a propagation delay time of only 15ns, this flip-flop enables fast data processing.

Advantages and Disadvantages

Advantages: - High-speed operation allows for efficient data processing. - Compatibility with TTL logic levels ensures easy integration into existing systems. - Dual flip-flop configuration provides flexibility in storing and transferring data.

Disadvantages: - Limited voltage supply range (2V to 6V) may restrict certain applications. - The package size (14-Pin SOIC) may not be suitable for space-constrained designs.

Working Principles

The CD74HCT74M operates based on the principles of positive-edge-triggered D-type flip-flops. When the clock signal rises from low to high, the input data (D1 and D2) is transferred to the corresponding output pins (Q1 and Q2). The CLR (clear) and PRE (preset) inputs allow for resetting or setting the flip-flop outputs to specific states. The flip-flop can be cleared asynchronously using the CLR input or synchronously using the CLR' input.

Detailed Application Field Plans

The CD74HCT74M finds applications in various digital systems where the storage and transfer of binary data are required. Some potential application fields include:

1. Digital Communication Systems: Used for data synchronization and buffering in communication protocols.
2. Microcontroller/Processor Interfaces: Facilitates data transfer between microcontrollers/processors and peripheral devices.
3. Memory Addressing: Enables address decoding and selection in memory systems.
4. Clock Synchronization: Utilized for synchronization of multiple clock domains in complex digital systems.
5. State Machine Design: Forms the building blocks for designing sequential logic circuits.

Detailed and Complete Alternative Models

1. SN74HCT74: Similar to CD74HCT74M, but available in a 14-Pin DIP (Dual In-Line Package) instead of SOIC.
2. MC74HCT74A: Offers enhanced noise immunity compared to CD74HCT74M, suitable for noisy environments.
3. 74HC74: A CMOS version of the flip-flop with similar functionality but operates at higher voltage levels.

These alternative models provide similar functionality to the CD74HCT74M and can be considered based on specific requirements and availability.

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