Encyclopedia Entry: 74AHCT74BQ,115

Product Information Overview

• Category: Integrated Circuit (IC)
• Use: Flip-Flop
• Characteristics: High-speed, low-power, dual D-type positive-edge-triggered flip-flop
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: Reliable and efficient storage element for digital circuits
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Logic Family: AHCT
• Number of Flip-Flops: 2
• Trigger Type: Positive-edge
• Clock Frequency: Up to 100 MHz
• Propagation Delay: 7 ns (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The 74AHCT74BQ,115 IC has a total of 14 pins, each serving a specific function:

1. Pin 1: Data Input (D1)
2. Pin 2: Clock Input (CLK1)
3. Pin 3: Set Input (SET1)
4. Pin 4: Reset Input (RESET1)
5. Pin 5: Output (Q1)
6. Pin 6: Complementary Output (Q̅1)
7. Pin 7: Ground (GND)
8. Pin 8: Output (Q̅2)
9. Pin 9: Complementary Output (Q2)
10. Pin 10: Data Input (D2)
11. Pin 11: Clock Input (CLK2)
12. Pin 12: Set Input (SET2)
13. Pin 13: Reset Input (RESET2)
14. Pin 14: Supply Voltage (VCC)

Functional Features

• Dual D-type flip-flop with independent inputs and outputs
• Positive-edge-triggered operation for synchronized data storage
• Asynchronous set and reset inputs for easy initialization
• High-speed operation suitable for time-critical applications
• Low power consumption for energy-efficient designs
• Wide operating temperature range for versatile usage scenarios

Advantages and Disadvantages

Advantages: - Reliable and robust storage element for digital circuits - High-speed operation enables efficient data processing - Low power consumption contributes to energy efficiency - Versatile operating temperature range for various environments

Disadvantages: - Limited number of flip-flops per IC (2 in this case) - Requires external clock signal for proper functioning

Working Principles

The 74AHCT74BQ,115 is a positive-edge-triggered flip-flop that stores digital data. It consists of two independent D-type flip-flops, each with its own data input (D), clock input (CLK), set input (SET), and reset input (RESET). The flip-flop operates on the rising edge of the clock signal, capturing the data present at the D input and storing it in the internal memory.

The set (SET) and reset (RESET) inputs allow for asynchronous initialization of the flip-flop's state. When the SET input is activated, the Q output goes high, while the Q̅ output goes low. Conversely, activating the RESET input sets Q to low and Q̅ to high. These inputs provide flexibility in controlling the initial state of the flip-flop.

Detailed Application Field Plans

The 74AHCT74BQ,115 flip-flop finds application in various digital systems and circuits, including:

1. Sequential Logic Circuits: Used as building blocks for counters, shift registers, and other sequential logic elements.
2. Data Storage Systems: Employed in memory units, cache systems, and data buffers for reliable data storage.
3. Clock Synchronization: Facilitates synchronization of multiple digital signals by capturing and aligning data at specific clock edges.
4. Digital Communication Systems: Enables efficient data transmission and reception in protocols such as UART, SPI, and I2C.
5. Microcontroller and FPGA Designs: Utilized for state machine implementations, control logic, and signal processing.

Detailed and Complete Alternative Models

1. 74HC74: Similar dual D-type flip-flop with slightly different electrical characteristics.
2. 74LS74: Dual D-type flip-flop with TTL (Transistor-Transistor Logic) compatible inputs and outputs.
3. CD4013B: CMOS-based dual D-type flip-flop with additional features like Schmitt-trigger inputs.

These alternative models offer similar functionality to the 74AHCT74BQ,115 and can be used as substitutes depending on specific design requirements.

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