SN74LS74ADR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Flip-Flop
• Characteristics: Dual D-Type Positive-Edge-Triggered Flip-Flop
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Sequential Logic Device
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 4.75V to 5.25V
• High-Level Input Voltage: 2V (minimum), 7V (maximum)
• Low-Level Input Voltage: 0.8V (minimum), 0.8V (maximum)
• High-Level Output Voltage: 2.7V (minimum), VCC (maximum)
• Low-Level Output Voltage: 0.5V (maximum)
• Maximum Operating Frequency: 33 MHz
• Propagation Delay Time: 15 ns (maximum)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The SN74LS74ADR has a total of 14 pins. The pin configuration is as follows:

1. CLR (Clear) - Active LOW input for resetting the flip-flop.
2. D1 (Data Input 1) - Data input for the first flip-flop.
3. CLK (Clock) - Clock input for triggering the flip-flop.
4. D2 (Data Input 2) - Data input for the second flip-flop.
5. SET (Set) - Active LOW input for setting the flip-flop.
6. Q1 (Output 1) - Output of the first flip-flop.
7. Q1' (Complementary Output 1) - Complementary output of the first flip-flop.
8. GND (Ground) - Ground reference for the IC.
9. Q2' (Complementary Output 2) - Complementary output of the second flip-flop.
10. Q2 (Output 2) - Output of the second flip-flop.
11. PRE (Preset) - Active LOW input for presetting the flip-flop.
12. VCC (Positive Power Supply) - Positive power supply for the IC.
13. NC (No Connection) - No connection.
14. NC (No Connection) - No connection.

Functional Features

The SN74LS74ADR is a dual D-type positive-edge-triggered flip-flop. It is designed to store and transfer data in sequential logic circuits. The flip-flop can be cleared, set, or preset based on the inputs provided. It operates on a clock signal and stores the data at the rising edge of the clock. The complementary outputs provide inverted versions of the stored data.

Advantages and Disadvantages

Advantages: - Dual flip-flop in a single package saves board space. - Positive-edge triggering ensures reliable operation. - Wide operating temperature range allows usage in various environments. - Low propagation delay time enables high-speed applications.

Disadvantages: - Limited maximum operating frequency compared to some other flip-flops. - Requires external components for proper functionality. - Not suitable for applications requiring asynchronous operation.

Working Principles

The SN74LS74ADR works based on the principles of sequential logic. When the clock input receives a rising edge, the data present at the D1 and D2 inputs are transferred to the respective flip-flops. The CLR and SET inputs control the state of the flip-flops by clearing or setting them. The PRE input presets the flip-flops when activated. The outputs Q1 and Q2 reflect the stored data, while Q1' and Q2' provide their inverted versions.

Detailed Application Field Plans

The SN74LS74ADR is commonly used in various digital systems and applications, including: - Counters and frequency dividers - Shift registers - Data storage and transfer circuits - Control and timing circuits - Clock synchronization systems

Detailed and Complete Alternative Models

Some alternative models to SN74LS74ADR that serve similar functions are: - CD4013B: Dual D-Type Flip-Flop - MC74HC74A: Dual D-Type Flip-Flop with Set and Reset - 74F74: Dual D-Type Positive-Edge-Triggered Flip-Flop

These alternatives may have different specifications, pin configurations, or package types, but they can be used as substitutes depending on the specific requirements of the application.

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