SN74LS646DWRG4

Product Overview

• Category: Integrated Circuit
• Use: Data Bus Transceiver
• Characteristics: High-speed, TTL Logic Level, Tri-state Outputs
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Bidirectional data transfer between two buses with different voltage levels
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 4.75V to 5.25V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Maximum Propagation Delay Time: 10ns
• Maximum Output Current: ±24mA

Detailed Pin Configuration

The SN74LS646DWRG4 has a total of 20 pins. The pin configuration is as follows:

1. A1 - Bus A Data Input/Output
2. B1 - Bus B Data Input/Output
3. A2 - Bus A Data Input/Output
4. B2 - Bus B Data Input/Output
5. A3 - Bus A Data Input/Output
6. B3 - Bus B Data Input/Output
7. A4 - Bus A Data Input/Output
8. B4 - Bus B Data Input/Output
9. GND - Ground
10. OE - Output Enable
11. DIR - Direction Control
12. VCC - Supply Voltage
13. B5 - Bus B Data Input/Output
14. A5 - Bus A Data Input/Output
15. B6 - Bus B Data Input/Output
16. A6 - Bus A Data Input/Output
17. B7 - Bus B Data Input/Output
18. A7 - Bus A Data Input/Output
19. B8 - Bus B Data Input/Output
20. A8 - Bus A Data Input/Output

Functional Features

• Bidirectional data transfer between two buses with different voltage levels
• Tri-state outputs allow for bus isolation when not in use
• TTL logic level compatibility ensures compatibility with other TTL devices
• High-speed operation enables fast data transfer

Advantages and Disadvantages

Advantages: - Enables seamless communication between buses with different voltage levels - Tri-state outputs provide bus isolation, reducing interference - Compatible with other TTL devices, allowing for easy integration into existing systems - High-speed operation ensures efficient data transfer

Disadvantages: - Limited to bidirectional data transfer only - Requires careful consideration of voltage level compatibility between buses

Working Principles

The SN74LS646DWRG4 is a data bus transceiver that facilitates bidirectional data transfer between two buses with different voltage levels. It operates by receiving data from one bus and transmitting it to the other, while also allowing data flow in the opposite direction. The direction of data flow is controlled by the DIR pin.

When the OE (Output Enable) pin is low, the outputs are enabled and data can be transmitted between the buses. When the OE pin is high, the outputs are disabled, effectively isolating the transceiver from the buses.

Detailed Application Field Plans

The SN74LS646DWRG4 is commonly used in various applications where bidirectional data transfer between buses with different voltage levels is required. Some specific application fields include:

1. Communication Systems: Facilitating data exchange between different communication protocols or interfaces.
2. Embedded Systems: Enabling communication between microcontrollers operating at different voltage levels.
3. Industrial Automation: Connecting sensors and actuators with different voltage requirements.
4. Automotive Electronics: Integrating various electronic components with different voltage levels.

Detailed and Complete Alternative Models

1. SN74LS245: Octal Bus Transceiver with Tri-state Outputs
2. SN74LVC4245A: Octal Bus Transceiver with 3-State Outputs
3. SN74LVTH245A: Octal Bus Transceiver with 3-State Outputs and 5V Tolerant Inputs

These alternative models offer similar functionality to the SN74LS646DWRG4 and can be considered as alternatives based on specific requirements.

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