SN74LS641N

Product Overview

• Category: Integrated Circuit
• Use: Data Bus Transceiver
• Characteristics: High-speed, TTL Logic Level Compatible, Bidirectional
• Package: DIP (Dual In-line Package)
• Essence: The SN74LS641N is a 8-bit bidirectional data bus transceiver designed for use in various digital systems.
• Packaging/Quantity: Available in tubes or reels, with quantities varying based on manufacturer and distributor.

Specifications

• Supply Voltage: 4.75V to 5.25V
• Input Voltage: 0V to 2V (Low), 2.7V to 5.25V (High)
• Output Voltage: 0V to 0.4V (Low), 2.7V to 3.5V (High)
• Operating Temperature: -40°C to +85°C
• Propagation Delay Time: 10ns (Max)
• Output Current: ±24mA

Pin Configuration

The SN74LS641N has a total of 20 pins, which are assigned specific functions as follows:

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

Functional Features

• Bidirectional data transfer between two independent buses (A and B)
• TTL logic level compatibility for easy integration with other digital systems
• High-speed operation for efficient data transmission
• Output enable and direction control pins for flexible control over data flow

Advantages and Disadvantages

Advantages

• Allows seamless communication between different digital systems using separate data buses
• Supports high-speed data transfer, making it suitable for time-critical applications
• Compatible with TTL logic levels, ensuring easy integration into existing systems

Disadvantages

• Limited to 8-bit data bus width, may not be suitable for applications requiring larger data transfers
• Requires careful consideration of timing and control signals to avoid data corruption or contention issues

Working Principles

The SN74LS641N operates as a bidirectional data bus transceiver by enabling data transfer between two independent buses (A and B). The direction of data flow is controlled by the DIR pin, while the OE pin enables or disables the output. When the DIR pin is set to transmit mode, data from bus A is transferred to bus B, and vice versa when in receive mode.

Detailed Application Field Plans

The SN74LS641N can be used in various digital systems where bidirectional data transfer is required. Some potential application fields include:

1. Microprocessor-based systems
2. Data acquisition systems
3. Communication equipment
4. Industrial automation
5. Embedded systems

Detailed and Complete Alternative Models

• SN74LS245N
• SN74HCT640N
• SN74HC646N
• SN74LVC4245APW

These alternative models offer similar functionality and can be used as replacements for the SN74LS641N in different applications.

In conclusion, the SN74LS641N is a versatile 8-bit bidirectional data bus transceiver that enables efficient communication between separate data buses. Its high-speed operation, TTL logic level compatibility, and flexible control features make it suitable for various digital systems. However, its limited data bus width and potential timing considerations should be taken into account when selecting this IC for specific applications.