Encyclopedia Entry: 74AC109SJ

Product Overview

Category

The 74AC109SJ belongs to the category of integrated circuits (ICs) and specifically falls under the family of flip-flops.

Use

This IC is commonly used in digital electronic circuits for storing and manipulating binary data. It serves as a dual positive-edge triggered JK flip-flop with clear functionality.

Characteristics

• Dual JK flip-flop with clear
• Positive-edge triggered
• High-speed operation
• Low power consumption
• Wide operating voltage range

Package

The 74AC109SJ is available in a small outline integrated circuit (SOIC) package, which provides ease of handling and compatibility with various circuit board designs.

Essence

The essence of the 74AC109SJ lies in its ability to store and control binary information within digital systems, enabling sequential logic operations.

Packaging/Quantity

This IC is typically packaged in reels or tubes, containing a quantity of 250 units per reel/tube.

Specifications

• Supply Voltage Range: 2V to 6V
• High-Level Input Voltage: 2V to VCC
• Low-Level Input Voltage: GND to 0.8V
• High-Level Output Voltage: VCC - 0.5V
• Low-Level Output Voltage: 0.5V
• Maximum Operating Frequency: 125 MHz

Detailed Pin Configuration

The 74AC109SJ has a total of 16 pins, each serving a specific function:

1. Clear (CLR)
2. Clock (CLK)
3. J-K Input 1 (J1-K1)
4. J-K Input 2 (J2-K2)
5. Set (SET)
6. Output 1 (Q1)
7. Complementary Output 1 (/Q1)
8. Output 2 (Q2)
9. Complementary Output 2 (/Q2)
10. Ground (GND)
11. Output Enable (OE)
12. Data Input (D)
13. Clock Enable (CE)
14. Power Supply (VCC)
15. J-K Input 3 (J3-K3)
16. J-K Input 4 (J4-K4)

Functional Features

• Dual flip-flop operation
• Positive-edge triggering for synchronous data transfer
• Clear input for resetting the flip-flop outputs
• Set input for setting the flip-flop outputs
• Output enable control for tri-state output operation
• Clock enable control for disabling clock input

Advantages and Disadvantages

Advantages

• High-speed operation allows for efficient data processing
• Low power consumption contributes to energy efficiency
• Wide operating voltage range enhances compatibility with various systems
• Compact SOIC package facilitates easy integration into circuit designs

Disadvantages

• Limited maximum operating frequency compared to some other flip-flop ICs
• Requires careful consideration of timing constraints in complex digital circuits

Working Principles

The 74AC109SJ operates based on the principles of sequential logic. It utilizes positive-edge triggering to synchronize data transfers between the inputs and outputs. The clear and set inputs allow for resetting and setting the flip-flop outputs, respectively. The output enable and clock enable controls provide additional flexibility in managing the output behavior.

Detailed Application Field Plans

The 74AC109SJ finds applications in various digital systems, including but not limited to: - Microprocessors and microcontrollers - Communication systems - Data storage devices - Industrial automation - Consumer electronics

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the 74AC109SJ include: - 74HC109: A high-speed CMOS version with comparable features - 74LS109: A low-power Schottky TTL version with similar functionality - CD4013: A dual D-type flip-flop IC with complementary outputs

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

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