Encyclopedia Entry: 74VHC74TTR

Product Overview

Category

The 74VHC74TTR belongs to the category of integrated circuits (ICs) and specifically falls under the family of flip-flops.

Use

This product is commonly used in digital electronics for storing and manipulating binary data. It serves as a fundamental building block in various applications, including sequential logic circuits, counters, registers, and memory units.

Characteristics

• High-speed operation: The 74VHC74TTR offers fast switching times, making it suitable for high-frequency applications.
• Low power consumption: This IC is designed to minimize power consumption, making it energy-efficient.
• Wide operating voltage range: It can operate within a wide voltage range, typically between 2V and 5.5V.
• Compatibility: The 74VHC74TTR is compatible with both TTL (Transistor-Transistor Logic) and CMOS (Complementary Metal-Oxide-Semiconductor) logic families.
• Compact package: It is available in a small-sized TSSOP (Thin Shrink Small Outline Package), which facilitates space-saving designs.

Packaging/Quantity

The 74VHC74TTR is typically packaged in reels or tubes, containing a specified quantity of ICs per package. The exact packaging and quantity may vary depending on the manufacturer and supplier.

Specifications

• Supply Voltage Range: 2V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Input Voltage High Level (VIH): 0.7 x VCC to VCC + 0.3V
• Input Voltage Low Level (VIL): -0.3V to 0.3 x VCC
• Output Voltage High Level (VOH): 0.9 x VCC to VCC
• Output Voltage Low Level (VOL): 0V to 0.1 x VCC
• Maximum Clock Frequency: X MHz (specific value depends on the manufacturer's datasheet)

Detailed Pin Configuration

The 74VHC74TTR IC consists of 14 pins, each serving a specific function:

1. Pin 1: Clear (CLR) - Asynchronous clear input for resetting the flip-flop.
2. Pin 2: Data Input (D) - Input pin for providing the data to be stored.
3. Pin 3: Clock (CLK) - Input pin for the clock signal that triggers the flip-flop.
4. Pin 4: Set (SET) - Asynchronous set input for setting the flip-flop.
5. Pin 5: Q Output - Output pin for the stored data (normal output).
6. Pin 6: Q̅ Output - Complementary output pin for the stored data.
7. Pins 7 to 14: Ground (GND) and Power Supply (VCC) pins.

Functional Features

The 74VHC74TTR is a dual positive-edge-triggered D-type flip-flop. It operates based on the clock signal provided at the CLK input. When the clock transitions from low to high (positive edge), the data present at the D input is captured and stored in the flip-flop. The stored data is then available at the Q and Q̅ outputs.

This IC also includes asynchronous clear (CLR) and set (SET) inputs, which allow for immediate resetting or setting of the flip-flop regardless of the clock signal. These features provide flexibility in controlling the state of the flip-flop.

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient processing of digital signals.
• Low power consumption contributes to energy-efficient designs.
• Wide operating voltage range allows for compatibility with various systems.
• Compact package facilitates space-saving designs.

Disadvantages

• Limited functionality: The 74VHC74TTR is specifically designed for flip-flop applications and may not be suitable for other complex logic functions.
• Sensitivity to noise: As with any digital circuit, this IC can be affected by noise and interference, requiring proper signal conditioning techniques.

Working Principles

The 74VHC74TTR operates based on the principles of sequential logic. It utilizes positive-edge-triggered flip-flops to store and manipulate binary data. The clock signal controls the timing of data capture and output generation, while the clear and set inputs provide additional control over the flip-flop's state.

Detailed Application Field Plans

The 74VHC74TTR finds extensive use in various digital systems and applications, including: 1. Microprocessors and microcontrollers 2. Data storage and retrieval systems 3. Communication devices (e.g., routers, switches) 4. Industrial automation and control systems 5. Consumer electronics (e.g., TVs, smartphones)

Its ability to store and process binary data makes it an essential component in these