Encyclopedia Entry: 74HCT74DB,118

Product Overview

• Category: Integrated Circuit (IC)
• Use: Flip-Flop
• Characteristics: High-speed, low-power, dual D-type flip-flop
• Package: SOIC-14
• Essence: Digital logic component for storing and manipulating binary data
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2.0V to 6.0V
• High-Level Input Voltage: 2.0V 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: 80 MHz
• Propagation Delay Time: 13 ns
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The 74HCT74DB,118 IC has a total of 14 pins, which are assigned as follows:

1. Q1: Output of the first flip-flop
2. Q1̅: Complementary output of the first flip-flop
3. D1: Data input for the first flip-flop
4. CLK1: Clock input for the first flip-flop
5. PRESET1: Preset input for the first flip-flop
6. CLEAR1: Clear input for the first flip-flop
7. GND: Ground reference
8. Q2: Output of the second flip-flop
9. Q2̅: Complementary output of the second flip-flop
10. D2: Data input for the second flip-flop
11. CLK2: Clock input for the second flip-flop
12. PRESET2: Preset input for the second flip-flop
13. CLEAR2: Clear input for the second flip-flop
14. VCC: Positive power supply

Functional Features

• Dual D-type positive-edge-triggered flip-flop
• Independent data, clock, preset, and clear inputs for each flip-flop
• Non-inverting outputs with complementary outputs available
• High-speed operation with low power consumption
• Wide operating voltage range
• Schmitt-trigger action on all inputs for improved noise immunity
• Direct interface with TTL levels

Advantages and Disadvantages

Advantages: - High-speed operation allows for efficient data processing - Low power consumption helps in reducing energy usage - Wide operating voltage range provides flexibility in various applications - Schmitt-trigger action enhances noise immunity, ensuring reliable operation - Direct interface with TTL levels simplifies integration with other components

Disadvantages: - Limited number of flip-flops (dual) compared to higher count ICs - Not suitable for applications requiring a large number of sequential logic elements

Working Principles

The 74HCT74DB,118 is a dual D-type flip-flop that stores and manipulates binary data. Each flip-flop operates independently, triggered by a positive edge of the clock signal. The data input is captured and stored when the clock transitions from low to high. The stored data can be outputted directly or in its complemented form. The preset and clear inputs allow for initialization and resetting of the flip-flops.

Detailed Application Field Plans

The 74HCT74DB,118 IC finds applications in various digital systems where the storage and manipulation of binary data are required. Some common application fields include: 1. Digital counters and registers 2. Data storage and retrieval systems 3. State machines and sequencers 4. Clock synchronization circuits 5. Data communication systems 6. Microcontroller and microprocessor interfacing

Detailed and Complete Alternative Models

1. 74HC74: Similar dual D-type flip-flop with slightly different electrical characteristics.
2. CD4013B: Dual D-type flip-flop with complementary outputs, suitable for higher voltage applications.
3. SN74LS74A: Dual positive-edge-triggered D-type flip-flop with TTL compatibility.

Note: This is not an exhaustive list, and there are several other alternative models available in the market.

In conclusion, the 74HCT74DB,118 is a high-speed, low-power, dual D-type flip-flop IC used in various digital systems. Its wide operating voltage range, Schmitt-trigger action, and direct interface with TTL levels make it a versatile component for storing and manipulating binary data. While it has limitations in terms of the number of flip-flops and sequential logic elements, it offers reliable performance and finds applications in diverse fields such as digital counters, data storage systems, and microcontroller interfacing.