SN74ACT74PW

Product Overview

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

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• High-Level Input Voltage: 2.0V min
• Low-Level Input Voltage: 0.8V max
• High-Level Output Voltage: 3.7V min
• Low-Level Output Voltage: 0.1V max
• Maximum Operating Frequency: 125MHz
• Propagation Delay Time: 6ns max
• Set-Up Time: 10ns min
• Hold Time: 2ns min

Detailed Pin Configuration

The SN74ACT74PW has a total of 14 pins, which are numbered as follows:

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

Functional Features

The SN74ACT74PW 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 operates on the rising edge of the clock signal, capturing the data inputs and storing them in its internal memory. The stored data can then be accessed through the output pins.

Advantages and Disadvantages

Advantages: - Dual flip-flop configuration allows for more complex sequential logic designs - Positive-edge triggering ensures reliable data capture - Wide supply voltage range allows for compatibility with various systems - Fast propagation delay time enables high-speed operation

Disadvantages: - Limited operating frequency compared to some other flip-flop types - Requires external clock signal for proper operation - Sensitive to noise and glitches on the clock input

Working Principles

The SN74ACT74PW flip-flop works based on the positive-edge-triggered D-type flip-flop principle. When the clock signal transitions from low to high (rising edge), the data inputs (D1 and D2) are sampled and stored in the flip-flop's internal memory. The stored data can then be accessed through the output pins (Q1 and Q2). The clear input (CLR) can be used to reset the flip-flop to a known state.

Detailed Application Field Plans

The SN74ACT74PW flip-flop finds applications in various digital systems where sequential logic is required. Some common application fields include:

1. Digital Counters: The flip-flop can be used as a building block for designing binary counters, allowing for counting and sequencing operations in digital circuits.
2. State Machines: Sequential logic circuits, such as finite state machines, can be implemented using multiple flip-flops interconnected to create complex behavior and control systems.
3. Data Storage: The flip-flop can be used to store temporary data in registers or memory elements within a digital system.

Detailed and Complete Alternative Models

1. SN74ACT74N: Similar to SN74ACT74PW, but in DIP (Dual In-line Package) form factor.
2. MC74ACT74: Equivalent flip-flop from a different manufacturer, Motorola.

These alternative models offer similar functionality and characteristics to the SN74ACT74PW, providing options for different package types or supplier preferences.

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