SN74AS74AD

Product Overview

• Category: Integrated Circuit (IC)
• Use: Flip-Flop
• Characteristics: Dual D-Type Positive-Edge-Triggered Flip-Flop
• Package: 14-pin Plastic Dual In-Line Package (PDIP)
• Essence: Sequential Logic Device
• Packaging/Quantity: Tube, 25 pieces per tube

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• High-Level Input Voltage: 2V to VCC
• Low-Level Input Voltage: GND to 0.8V
• High-Level Output Current: -0.4mA
• Low-Level Output Current: 8mA
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The SN74AS74AD has a total of 14 pins, numbered as follows:

1. CLR (Clear) - Active LOW clear input
2. D1 (Data 1) - Data input for flip-flop 1
3. CLK (Clock) - Clock input
4. D2 (Data 2) - Data input for flip-flop 2
5. Q2 (Output 2) - Output for flip-flop 2
6. Q1 (Output 1) - Output for flip-flop 1
7. GND (Ground) - Ground reference
8. Q1 (Output 1) - Output for flip-flop 1
9. Q2 (Output 2) - Output for flip-flop 2
10. VCC (Supply Voltage) - Positive supply voltage
11. D2 (Data 2) - Data input for flip-flop 2
12. CLK (Clock) - Clock input
13. D1 (Data 1) - Data input for flip-flop 1
14. CLR (Clear) - Active LOW clear input

Functional Features

The SN74AS74AD is a dual D-type positive-edge-triggered flip-flop. It has two independent flip-flops with individual data inputs (D1 and D2), clock inputs (CLK), and outputs (Q1 and Q2). The flip-flops are triggered on the rising edge of the clock signal. The clear input (CLR) allows for resetting the flip-flops to a known state.

Advantages and Disadvantages

Advantages: - Dual flip-flop design provides flexibility in sequential logic applications. - Positive-edge triggering ensures reliable operation. - Wide supply voltage range allows for compatibility with various systems.

Disadvantages: - Limited output current capability may restrict use in certain high-current applications. - Only supports positive-edge triggering, limiting its compatibility with negative-edge triggered systems.

Working Principles

The SN74AS74AD operates based on the principles of sequential logic. Each flip-flop stores a single bit of information and updates its output based on the clock signal and the data input. On the rising edge of the clock signal, the data input is transferred to the output, allowing for the storage and propagation of digital information.

Detailed Application Field Plans

The SN74AS74AD is commonly used in various digital systems and applications, including: - Counters and frequency dividers - Shift registers - Data storage and retrieval systems - Control and timing circuits

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to the SN74AS74AD include: - CD4013BCN: CMOS Dual D-Type Flip-Flop - MC74HC74AN: High-Speed CMOS Dual D Flip-Flop - 74LS74: Low-Power Schottky Dual D Flip-Flop

These alternative models offer similar functionality and can be used as replacements depending on specific requirements and system compatibility.

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