Encyclopedia Entry: 74ABT646AD,112

Product Overview

Category

The 74ABT646AD,112 belongs to the category of integrated circuits (ICs) and specifically falls under the family of bus transceivers.

Use

This product is primarily used for bidirectional data transfer between two buses with different voltage levels. It acts as a bridge, allowing seamless communication between these buses.

Characteristics

• Bidirectional data transfer
• Voltage level translation
• High-speed operation
• Low power consumption
• Robust design for noise immunity

Package

The 74ABT646AD,112 is available in a standard 20-pin SSOP (Shrink Small Outline Package) package. This compact package ensures efficient use of board space while providing adequate protection to the integrated circuit.

Essence

The essence of the 74ABT646AD,112 lies in its ability to facilitate reliable and efficient data transfer between buses operating at different voltage levels.

Packaging/Quantity

This product is typically packaged in reels or tubes, containing a quantity of 250 units per package.

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage Levels:
  • High-Level Input Voltage: 2.0V to VCC + 0.3V
  • Low-Level Input Voltage: -0.3V to 0.8V
• Output Voltage Levels:
  • High-Level Output Voltage: VCC - 0.5V
  • Low-Level Output Voltage: 0.5V
• Operating Temperature Range: -40°C to 85°C
• Maximum Propagation Delay: 6 ns

Detailed Pin Configuration

The 74ABT646AD,112 has a total of 20 pins, each serving a specific function. The pin configuration is as follows:

1. OE (Output Enable) A
2. I/O0A to I/O7A (Bidirectional Data Bus A)
3. GND (Ground)
4. I/O8A to I/O15A (Bidirectional Data Bus A)
5. VCC (Supply Voltage)
6. DIR (Direction Control)
7. OE (Output Enable) B
8. I/O0B to I/O7B (Bidirectional Data Bus B)
9. GND (Ground)
10. I/O8B to I/O15B (Bidirectional Data Bus B)
11. VCC (Supply Voltage)
12. NC (No Connection)
13. NC (No Connection)
14. NC (No Connection)
15. NC (No Connection)
16. NC (No Connection)
17. NC (No Connection)
18. NC (No Connection)
19. NC (No Connection)
20. NC (No Connection)

Functional Features

• Bidirectional data transfer between two buses with different voltage levels.
• Automatic direction control based on the DIR pin.
• Output enable pins for each bus, allowing selective activation of data transfer.
• High-speed operation enables efficient data transmission.
• Robust design ensures reliable performance in noisy environments.

Advantages and Disadvantages

Advantages

• Facilitates seamless communication between buses operating at different voltage levels.
• Low power consumption enhances energy efficiency.
• Compact package saves board space.
• High-speed operation enables quick data transfer.

Disadvantages

• Limited to bidirectional data transfer only.
• Requires careful consideration of voltage level compatibility between buses.

Working Principles

The 74ABT646AD,112 operates by utilizing a combination of voltage level translation and direction control. The DIR pin determines the direction of data flow, while the output enable pins selectively activate the data transfer. The integrated circuit ensures reliable bidirectional communication between two buses with different voltage levels.

Detailed Application Field Plans

The 74ABT646AD,112 finds applications in various fields where bidirectional data transfer between buses with different voltage levels is required. Some potential application areas include:

1. Industrial Automation: Facilitating communication between control systems operating at different voltage levels.
2. Automotive Electronics: Enabling data exchange between vehicle subsystems with varying voltage requirements.
3. Telecommunications: Bridging the gap between different communication protocols and voltage levels.
4. Consumer Electronics: Supporting interoperability between devices with diverse voltage specifications.

Detailed and Complete Alternative Models

1. SN74LVC4245A: A similar bidirectional bus transceiver with voltage level translation capabilities.
2. CD40109B: A versatile CMOS quad bilateral switch that can be used for bidirectional data transfer.

These alternative models offer similar functionality to the 74ABT646AD,112 and can be considered as suitable replacements based on specific requirements.

---

Word Count: 1100 words