SN74AC74DBR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Flip-Flop
• Characteristics: Dual D-Type Positive-Edge-Triggered Flip-Flop
• Package: SSOP (Shrink Small Outline Package)
• Essence: Digital Logic IC for storing and transferring data
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 2V to 6V
• High-Level Input Voltage: 2V to VCC + 0.5V
• Low-Level Input Voltage: -0.5V to 0.8V
• High-Level Output Current: -24mA
• Low-Level Output Current: 24mA
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The SN74AC74DBR has a total of 14 pins:

1. CLR (Clear) - Active LOW clear input
2. D (Data) - Data input
3. CLK (Clock) - Clock input
4. PR (Preset) - Active LOW preset input
5. Q (Output) - Complementary output
6. Q̅ (Output) - Non-complementary output
7. GND (Ground) - Ground reference
8. Q̅ (Output) - Non-complementary output
9. Q (Output) - Complementary output
10. VCC (Positive Power Supply) - Positive power supply voltage
11. D (Data) - Data input
12. CLK (Clock) - Clock input
13. PR (Preset) - Active LOW preset input
14. CLR (Clear) - Active LOW clear input

Functional Features

The SN74AC74DBR is a dual D-type positive-edge-triggered flip-flop. It can store and transfer data based on the clock input. The flip-flop has a clear input (CLR) and a preset input (PR) for additional control. It operates with a supply voltage range of 2V to 6V and can handle high-level output currents of -24mA and low-level output currents of 24mA.

Advantages and Disadvantages

Advantages: - Dual flip-flop in a single package, saving board space - Positive-edge-triggered design ensures reliable data storage and transfer - Wide operating temperature range allows for various applications - Can handle high-level and low-level output currents

Disadvantages: - Limited supply voltage range (2V to 6V) - Only supports positive-edge triggering - May require additional external components for certain applications

Working Principles

The SN74AC74DBR operates based on the positive-edge-triggered flip-flop principle. When the clock input (CLK) transitions from LOW to HIGH, the data input (D) is transferred to the outputs (Q and Q̅). The clear input (CLR) and preset input (PR) allow for additional control over the stored data. The flip-flop operates within the specified supply voltage range and can handle different output current levels.

Detailed Application Field Plans

The SN74AC74DBR is commonly used in various digital systems and applications, including:

1. Data storage and transfer in microcontrollers and microprocessors.
2. Sequential logic circuits for counters, shift registers, and state machines.
3. Communication systems for data synchronization and buffering.
4. Control systems for timing and synchronization purposes.
5. Memory modules for address decoding and data storage.

Detailed and Complete Alternative Models

1. SN74AC74DR - Similar dual D-type positive-edge-triggered flip-flop in SOIC (Small Outline Integrated Circuit) package.
2. MC74AC74N - Dual D-type positive-edge-triggered flip-flop in DIP (Dual In-line Package) format.
3. CD74AC74E - Dual D-type positive-edge-triggered flip-flop in PDIP (Plastic Dual In-line Package) package.

These alternative models offer similar functionality and can be used as replacements for the SN74AC74DBR in various applications.

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