SN74ABT821ADW

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Level Translator
• Characteristics:
  • High-speed operation
  • Wide voltage range compatibility
  • Bidirectional translation capability
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Logic level translation between different voltage domains
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2 V to 6 V
• Input Voltage Range (A Port): 0 V to VCC_A
• Input Voltage Range (B Port): 0 V to VCC_B
• Output Voltage Range (A Port): 0 V to VCC_A
• Output Voltage Range (B Port): 0 V to VCC_B
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 3.5 ns (typical)
• Output Drive Capability: ±24 mA

Detailed Pin Configuration

The SN74ABT821ADW has a total of 20 pins arranged as follows:

1. A1
2. B1
3. GND
4. B2
5. A2
6. OE#
7. VCC_B
8. B3
9. A3
10. A4
11. B4
12. GND
13. B5
14. A5
15. OE#
16. VCC_A
17. A6
18. B6
19. GND
20. B7

Functional Features

• Bidirectional voltage level translation between two independent voltage domains
• Automatic direction sensing and control
• Non-inverting translation
• High-speed operation suitable for various applications

Advantages and Disadvantages

Advantages: - Wide voltage range compatibility allows for versatile use - High-speed operation enables efficient data transfer - Bidirectional translation capability simplifies circuit design

Disadvantages: - Limited output drive capability may not be suitable for high-current applications - Propagation delay time may affect timing-sensitive systems

Working Principles

The SN74ABT821ADW is designed to translate logic levels between two different voltage domains. It features bidirectional translation, allowing seamless communication between devices operating at different voltage levels. The automatic direction sensing and control feature eliminates the need for additional control signals.

When the OE# (Output Enable) pin is low, the device is enabled, and the A port is connected to the B port. When OE# is high, the device is disabled, and the A and B ports are isolated.

The SN74ABT821ADW utilizes a combination of MOSFETs and CMOS technology to achieve high-speed operation and wide voltage range compatibility.

Detailed Application Field Plans

The SN74ABT821ADW can be used in various applications that require logic level translation between different voltage domains. Some potential application fields include:

1. Microcontroller interfacing with peripherals operating at different voltage levels
2. Communication interfaces between devices with varying logic levels
3. Level shifting in mixed-voltage systems
4. Data transmission between different voltage domains in industrial automation

Detailed and Complete Alternative Models

1. SN74LVC4245A: Octal Bus Transceiver with 3-State Outputs
2. TXB0108: 8-Bit Bidirectional Voltage-Level Translator
3. PCA9306: Dual Bi-Directional I2C Bus and SMBus Voltage-Level Translator

These alternative models offer similar functionality and can be considered as alternatives to the SN74ABT821ADW based on specific requirements and system constraints.

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