Encyclopedia Entry: 74AC109SC

Product Overview

Category

The 74AC109SC belongs to the category of integrated circuits (ICs), specifically digital logic devices.

Use

This product is commonly used in electronic circuits for various applications, including data storage, counters, and flip-flops.

Characteristics

• The 74AC109SC is a dual positive-edge triggered JK flip-flop.
• It operates on a wide voltage range, typically between 2V and 6V.
• This IC offers high-speed performance and low power consumption.
• It is designed to be compatible with both TTL and CMOS logic families.

Package and Quantity

The 74AC109SC is available in a small outline integrated circuit (SOIC) package. It is supplied in tape and reel packaging, with a quantity of 250 units per reel.

Specifications

• Supply Voltage Range: 2V to 6V
• High-Level Input Voltage: 2V (minimum), Vcc (maximum)
• Low-Level Input Voltage: GND (minimum), 0.8V (maximum)
• High-Level Output Voltage: Vcc - 0.5V (minimum), Vcc (maximum)
• Low-Level Output Voltage: 0V (minimum), 0.4V (maximum)
• Maximum Operating Frequency: 125 MHz

Pin Configuration

The 74AC109SC has a total of 16 pins, which are assigned specific functions as follows:

1. CLR (Clear) - Clear input pin
2. CLK (Clock) - Clock input pin
3. J (J Input) - J input pin
4. K (K Input) - K input pin
5. Q1 (Q1 Output) - Q1 output pin
6. Q1̅ (Q1 Complement Output) - Q1 complement output pin
7. GND (Ground) - Ground pin
8. Q0̅ (Q0 Complement Output) - Q0 complement output pin
9. Q0 (Q0 Output) - Q0 output pin
10. Vcc (Positive Power Supply) - Positive power supply pin
11. PRE (Preset) - Preset input pin
12. PR̅E (Preset Complement) - Preset complement input pin
13. K (K Input) - K input pin
14. J (J Input) - J input pin
15. CLK (Clock) - Clock input pin
16. CLR (Clear) - Clear input pin

Functional Features

The 74AC109SC offers the following functional features:

• Dual JK flip-flop with individual clear and preset inputs.
• Positive-edge triggered operation.
• Asynchronous clear and preset inputs for immediate state control.
• Direct implementation of flip-flop functions without external gates.

Advantages and Disadvantages

Advantages: - High-speed performance enables efficient data processing. - Low power consumption contributes to energy efficiency. - Compatibility with TTL and CMOS logic families allows for versatile integration into various circuit designs.

Disadvantages: - Limited voltage range of 2V to 6V may not be suitable for all applications. - The small outline integrated circuit (SOIC) package may require additional precautions during assembly and handling.

Working Principles

The 74AC109SC operates as a dual positive-edge triggered JK flip-flop. It stores and manipulates binary information based on the clock signal and input values provided to the J and K pins. The clear and preset inputs allow for immediate state control, enabling the flip-flop to be set or cleared asynchronously.

Application Field Plans

The 74AC109SC can be utilized in various electronic applications, including but not limited to: - Data storage systems - Counters and frequency dividers - State machines and sequencers - Address decoding circuits

Alternative Models

Alternative models that offer similar functionality to the 74AC109SC include: - 74HC109: A high-speed CMOS version of the JK flip-flop. - 74LS109: A low-power Schottky TTL version of the JK flip-flop.

These alternative models can be considered based on specific project requirements, availability, and compatibility with existing circuit designs.

In conclusion, the 74AC109SC is a versatile dual JK flip-flop integrated circuit. Its high-speed performance, low power consumption, and compatibility with different logic families make it suitable for various digital applications.