Encyclopedia Entry: 74ABT646CMTCX

Product Overview

Category

The 74ABT646CMTCX belongs to the category of integrated circuits (ICs) and specifically falls under the family of bus transceivers.

Use

This IC is primarily used for bidirectional data transfer between two buses with different voltage levels. It acts as a buffer, allowing seamless communication between systems operating at different voltage levels.

Characteristics

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

Package and Quantity

The 74ABT646CMTCX is available in a surface-mount package. The specific package type is CMTCX, which stands for Ceramic Metric Thin Chip Carrier with eXposed leads. It is supplied in tape and reel packaging, with a standard quantity of 250 units per reel.

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage Levels: 0V to VCC
• Output Voltage Levels: 0V to VCC
• Maximum Operating Frequency: 100MHz
• Propagation Delay: 6ns (typical)
• Output Drive Capability: ±24mA

Pin Configuration

The 74ABT646CMTCX has a total of 24 pins, which are assigned specific functions as follows:

1. OE (Output Enable) A
2. I/O0A (Bidirectional Data Bus) A
3. I/O1A (Bidirectional Data Bus) A
4. I/O2A (Bidirectional Data Bus) A
5. I/O3A (Bidirectional Data Bus) A
6. I/O4A (Bidirectional Data Bus) A
7. GND (Ground)
8. VCC (Supply Voltage)
9. I/O7A (Bidirectional Data Bus) A
10. I/O6A (Bidirectional Data Bus) A
11. I/O5A (Bidirectional Data Bus) A
12. DIR (Direction Control)
13. OE (Output Enable) B
14. I/O0B (Bidirectional Data Bus) B
15. I/O1B (Bidirectional Data Bus) B
16. I/O2B (Bidirectional Data Bus) B
17. I/O3B (Bidirectional Data Bus) B
18. I/O4B (Bidirectional Data Bus) B
19. VCC (Supply Voltage)
20. GND (Ground)
21. I/O7B (Bidirectional Data Bus) B
22. I/O6B (Bidirectional Data Bus) B
23. I/O5B (Bidirectional Data Bus) B
24. DIR (Direction Control)

Functional Features

The 74ABT646CMTCX offers the following functional features:

• Bidirectional data transfer between two buses with different voltage levels.
• Automatic direction control based on the DIR pin.
• Output enable pins (OE) for individual bus control.
• High-speed operation, allowing efficient data transmission.
• Robust design with built-in noise immunity measures.

Advantages and Disadvantages

Advantages

• Facilitates seamless communication between systems operating at different voltage levels.
• Provides bidirectional data transfer capability.
• Offers high-speed operation for efficient data transmission.
• Low power consumption, making it suitable for battery-powered devices.
• Robust design ensures reliable performance even in noisy environments.

Disadvantages

• Limited to specific voltage ranges (4.5V to 5.5V).
• Propagation delay of 6ns may not be suitable for ultra-high-speed applications.
• Requires careful consideration of input and output voltage levels to prevent damage.

Working Principles

The 74ABT646CMTCX operates based on the principle of voltage level translation. It uses a combination of transistors and logic gates to convert signals between two buses with different voltage levels. The direction of data transfer is controlled by the DIR pin, while the OE pins enable or disable the output for each bus independently.

Application Field Plans

The 74ABT646CMTCX 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 systems
2. Automotive electronics
3. Communication equipment
4. Medical devices
5. Consumer electronics

Alternative Models

For users seeking alternative options, the following ICs can be considered:

1. SN74LVC245A: This IC offers similar bidirectional data transfer capabilities but operates at a lower voltage range (1.65V to 5.5V).
2. CD4050B: This IC provides voltage level shifting functionality but does not support bidirectional data transfer.
3. TXS0108E: This IC is