SN74BCT646DW

Product Overview

• Category: Integrated Circuit
• Use: Bus Transceiver and Register
• Characteristics: High-speed, Bi-directional, 3-state, Voltage-level Translation
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Transfers data between two bidirectional buses with different voltage levels
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 6.5ns (Max)
• Output Current: ±24mA
• Input Capacitance: 4pF
• Output Capacitance: 8pF

Detailed Pin Configuration

The SN74BCT646DW has a total of 24 pins. The pin configuration is as follows:

1. OE (Output Enable) A
2. I/O A7
3. I/O A6
4. I/O A5
5. I/O A4
6. GND (Ground)
7. I/O A3
8. I/O A2
9. I/O A1
10. I/O A0
11. VCC (Supply Voltage)
12. DIR (Direction Control)
13. I/O B0
14. I/O B1
15. I/O B2
16. I/O B3
17. GND (Ground)
18. I/O B4
19. I/O B5
20. I/O B6
21. I/O B7
22. OE (Output Enable) B
23. LE (Latch Enable)
24. GND (Ground)

Functional Features

• Bi-directional data transfer between two buses with different voltage levels
• 3-state outputs for bus isolation
• Voltage-level translation for compatibility between different logic families
• Latch enable for storing data on the B bus

Advantages and Disadvantages

Advantages: - High-speed operation - Bi-directional functionality simplifies bus communication - Voltage-level translation allows interfacing between different logic families

Disadvantages: - Limited to a specific package type (SOIC) - Requires careful consideration of voltage compatibility between buses

Working Principles

The SN74BCT646DW is designed to facilitate bidirectional data transfer between two buses operating at different voltage levels. It uses a combination of direction control (DIR) and latch enable (LE) signals to control the flow of data. When DIR is high, data flows from bus A to bus B, and when DIR is low, data flows from bus B to bus A. The latch enable signal (LE) is used to store data on the B bus.

Detailed Application Field Plans

The SN74BCT646DW is commonly used in various applications that require bidirectional data transfer and voltage-level translation. Some of the typical application fields include:

1. Microcontroller interfacing with external devices
2. Communication systems involving multiple buses with different voltage levels
3. Data acquisition systems requiring level shifting
4. Industrial automation and control systems
5. Automotive electronics for interfacing between different subsystems

Detailed and Complete Alternative Models

1. SN74LVC646ADW: Low-Voltage CMOS Bus Transceiver and Register
2. SN74HCT646N: High-Speed CMOS Logic Bus Transceiver and Register
3. SN74ACT646DW: Advanced CMOS Logic Bus Transceiver and Register
4. SN74LVTH646PW: Low-Voltage TTL Logic Bus Transceiver and Register
5. SN74ABT646ADW: Advanced BiCMOS Technology Bus Transceiver and Register

These alternative models offer similar functionality to the SN74BCT646DW but may have different characteristics, specifications, or package options.

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