SN74LVC821APWT

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Gates
• Characteristics: Low-Voltage CMOS, 10-Bit Bus Interface Flip-Flop with 3-State Outputs
• Package: TSSOP-20
• Essence: Flip-flop with 3-state outputs for bus interface applications
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 1.65V to 3.6V
• High-Level Input Voltage: 2V (Minimum), 3.6V (Maximum)
• Low-Level Input Voltage: 0.8V (Minimum), 0.8V (Maximum)
• High-Level Output Voltage: 2.4V (Minimum), VCC (Maximum)
• Low-Level Output Voltage: 0V (Minimum), 0.4V (Maximum)
• Maximum Operating Frequency: 80MHz
• Propagation Delay Time: 5.7ns (Typical)

Detailed Pin Configuration

The SN74LVC821APWT has a total of 20 pins. The pin configuration is as follows:

1. GND - Ground
2. D0 - Data Input Bit 0
3. D1 - Data Input Bit 1
4. D2 - Data Input Bit 2
5. D3 - Data Input Bit 3
6. D4 - Data Input Bit 4
7. D5 - Data Input Bit 5
8. D6 - Data Input Bit 6
9. D7 - Data Input Bit 7
10. OE - Output Enable
11. CP - Clock Pulse
12. MR - Master Reset
13. Q0 - Output Bit 0
14. Q1 - Output Bit 1
15. Q2 - Output Bit 2
16. Q3 - Output Bit 3
17. Q4 - Output Bit 4
18. Q5 - Output Bit 5
19. Q6 - Output Bit 6
20. VCC - Power Supply

Functional Features

The SN74LVC821APWT is a 10-bit bus interface flip-flop with 3-state outputs. It is designed to be used in applications where multiple devices need to share a common bus. The flip-flop stores the input data and provides output signals synchronized with the clock pulse. The 3-state outputs allow the device to be disconnected from the bus when not in use, preventing any interference.

Advantages and Disadvantages

Advantages: - Low-voltage operation allows for compatibility with various systems - 3-state outputs enable easy bus sharing among multiple devices - High operating frequency supports fast data transfer - Compact TSSOP-20 package saves board space

Disadvantages: - Limited to 10-bit bus interface applications - Requires external clock pulse and master reset signals

Working Principles

The SN74LVC821APWT operates based on the principles of flip-flops and 3-state logic. When the clock pulse signal is received, the flip-flop captures the input data and stores it until the next clock cycle. The stored data is then available at the output pins. The 3-state outputs allow the device to disconnect from the bus by entering a high-impedance state when the output enable signal is inactive.

Detailed Application Field Plans

The SN74LVC821APWT is commonly used in various digital systems that require bus interface functionality. Some specific application fields include:

1. Microcontrollers: Used for interfacing microcontrollers with external memory or peripheral devices.
2. Communication Systems: Facilitates data transfer between different communication modules.
3. Industrial Automation: Enables communication between different control units in industrial automation systems.
4. Automotive Electronics: Used for bus communication in automotive electronic control units (ECUs).
5. Consumer Electronics: Provides bus interface capabilities in devices such as TVs, set-top boxes, and gaming consoles.

Detailed and Complete Alternative Models

1. SN74LVC821APW: Similar to SN74LVC821APWT but without tape and reel packaging.
2. SN74LVC821ADGVR: 10-bit bus interface flip-flop with 3-state outputs in a smaller TVSOP-20 package.
3. SN74LVC821ARGYR: 10-bit bus interface flip-flop with 3-state outputs in a QFN-20 package.

These alternative models offer similar functionality and can be used as replacements for the SN74LVC821APWT depending on specific requirements.

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