SN74LV74AD

Product Overview

• Category: Integrated Circuit (IC)
• Use: Flip-Flop
• Characteristics:
  • Low-voltage operation
  • Dual D-type positive-edge-triggered flip-flop
  • Schmitt-trigger inputs for noise immunity
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Reliable and efficient flip-flop IC
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage Range: 1.65V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Input Voltage High Level (VIH): 2V to VCC + 0.5V
• Input Voltage Low Level (VIL): -0.5V to 0.8V
• Output Voltage High Level (VOH): VCC - 0.5V
• Output Voltage Low Level (VOL): 0.4V
• Propagation Delay Time (tpd): 9 ns (typical)

Pin Configuration

The SN74LV74AD has a total of 14 pins, as shown below:

+---+--+---+ CLR |1 +--+ 14| VCC D |2 13| Q CLK |3 12| Q̅ GND |4 11| D̅ PRE |5 10| PR̅ PR |6 9| PR Q̅ |7 8| CLK̅ +----------+

Functional Features

• Dual D-type positive-edge-triggered flip-flop with clear (CLR) and preset (PRE) inputs
• Schmitt-trigger inputs provide noise immunity and improve signal integrity
• Low-voltage operation allows for compatibility with a wide range of systems
• Reliable and efficient performance due to high-quality manufacturing standards

Advantages and Disadvantages

Advantages: - Low-voltage operation makes it suitable for battery-powered devices - Schmitt-trigger inputs ensure reliable operation in noisy environments - Compact SOIC package saves board space

Disadvantages: - Limited operating temperature range (-40°C to +85°C) - Not suitable for high-speed applications due to relatively long propagation delay time

Working Principles

The SN74LV74AD is a dual D-type flip-flop that operates on positive-edge clock transitions. It stores data at the input (D) and transfers it to the output (Q) when a rising edge is detected on the clock (CLK) input. The clear (CLR) and preset (PRE) inputs allow for resetting or setting the flip-flop to specific states.

Detailed Application Field Plans

The SN74LV74AD is commonly used in various digital systems, including:

1. Sequential Logic Circuits: Used as building blocks for counters, shift registers, and other sequential logic circuits.
2. Data Storage Systems: Employed in memory units and data storage systems where reliable data retention is crucial.
3. Communication Systems: Utilized in communication systems for synchronization and data buffering purposes.
4. Control Systems: Integrated into control systems to store and synchronize control signals.

Detailed and Complete Alternative Models

1. SN74LV74A: Similar to SN74LV74AD but available in a different package (TSSOP).
2. CD4013B: Dual D-type flip-flop with similar functionality but operates at a wider voltage range.
3. 74HC74: Dual D-type flip-flop with comparable characteristics but operates at higher speeds.

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