Encyclopedia Entry: 74ACT109

Product Overview

Category

The 74ACT109 is a digital integrated circuit belonging to the category of flip-flops.

Use

This IC is primarily used for storing and manipulating binary data in electronic circuits. It can be employed in various applications, including sequential logic circuits, counters, registers, and memory units.

Characteristics

• The 74ACT109 operates on a supply voltage range of 4.5V to 5.5V.
• It features two independent positive-edge-triggered JK flip-flops with preset and clear inputs.
• This IC offers high-speed operation and low power consumption.
• It is compatible with TTL (Transistor-Transistor Logic) input and output voltage levels.
• The 74ACT109 is available in a 16-pin dual in-line package (DIP).

Package and Quantity

The 74ACT109 is typically packaged in a plastic or ceramic dual in-line package (DIP). Each package contains one IC.

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• High-Level Input Voltage: 2.0V (min), 5.5V (max)
• Low-Level Input Voltage: 0.8V (min), 0.8V (max)
• High-Level Output Voltage: 2.7V (min), VCC (max)
• Low-Level Output Voltage: 0.5V (min), 0.5V (max)
• Maximum Operating Frequency: 125 MHz

Pin Configuration

The 74ACT109 IC has a total of 16 pins, which are assigned specific functions as follows:

1. Clear (CLR) - Active LOW clear input
2. Clock (CLK) - Positive-edge-triggered clock input
3. Preset (PRE) - Active LOW preset input
4. J1 - J input for flip-flop 1
5. K1 - K input for flip-flop 1
6. Q1 - Output of flip-flop 1
7. Q̅1 - Complementary output of flip-flop 1
8. Ground (GND) - Common ground reference
9. Q̅2 - Complementary output of flip-flop 2
10. Q2 - Output of flip-flop 2
11. K2 - K input for flip-flop 2
12. J2 - J input for flip-flop 2
13. Clock Enable (CE) - Active HIGH clock enable input
14. Data (D) - Data input
15. Set (SET) - Active LOW set input
16. VCC - Positive power supply

Functional Features

The 74ACT109 offers the following functional features:

• Dual JK flip-flops with independent inputs and outputs.
• Clear and preset inputs for synchronous reset and initialization.
• Positive-edge-triggered clock input for synchronized operation.
• Complementary outputs for each flip-flop, providing both true and inverted signals.
• Clock enable input for controlling the clocking of the flip-flops.
• Compatibility with TTL logic levels allows easy integration into existing circuits.

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient data processing.
• Low power consumption contributes to energy efficiency.
• Versatile functionality makes it suitable for various applications.
• Compatibility with TTL logic simplifies integration into existing systems.

Disadvantages

• Limited operating voltage range restricts its use in certain applications.
• The 74ACT109 is not suitable for high-frequency applications due to its maximum operating frequency limitation.

Working Principles

The 74ACT109 operates based on the principles of sequential logic. It utilizes JK flip-flops to store and manipulate binary data. The clock input triggers the flip-flops, allowing them to change their output states based on the inputs received. The clear and preset inputs provide synchronous reset and initialization capabilities.

Application Field Plans

The 74ACT109 finds applications in various fields, including:

1. Digital counters and registers
2. Memory units and storage systems
3. Control and timing circuits
4. Data processing and manipulation systems
5. Communication and networking devices

Alternative Models

Several alternative models with similar functionality to the 74ACT109 are available in the market. Some notable alternatives include:

1. 74HC109: A CMOS-based variant offering similar features but operating at a wider voltage range.
2. 74LS109: A low-power Schottky TTL version with comparable functionality.
3. CD4013: A dual D-type flip-flop IC that can be used as an alternative in certain applications.

These alternative models provide flexibility in choosing the most suitable IC for specific circuit requirements.

In conclusion, the 74ACT109 is a versatile flip-flop IC widely used in digital logic circuits. Its high-speed