SN74LS641-1DW

Product Overview

Category

The SN74LS641-1DW belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in digital electronics for data bus transceivers.

Characteristics

• The SN74LS641-1DW is a bidirectional octal transceiver with tri-state outputs.
• It operates on a supply voltage range of 4.75V to 5.25V.
• This IC has a high-speed propagation delay of 9ns and a low power consumption of 55mW.
• It is designed to work in harsh industrial environments, with an operating temperature range of -40°C to +85°C.

Package

The SN74LS641-1DW is available in a standard 20-pin SOIC (Small Outline Integrated Circuit) package.

Essence

The essence of the SN74LS641-1DW lies in its ability to facilitate bidirectional data transfer between two buses or systems.

Packaging/Quantity

This IC is typically sold in reels or tubes, with a quantity of 250 units per reel or tube.

Specifications

• Supply Voltage Range: 4.75V to 5.25V
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay: 9ns
• Power Consumption: 55mW
• Package Type: 20-pin SOIC

Detailed Pin Configuration

The SN74LS641-1DW has a total of 20 pins, which are assigned specific functions as follows:

1. A0: Data Bus A Bit 0
2. A1: Data Bus A Bit 1
3. A2: Data Bus A Bit 2
4. A3: Data Bus A Bit 3
5. A4: Data Bus A Bit 4
6. A5: Data Bus A Bit 5
7. A6: Data Bus A Bit 6
8. A7: Data Bus A Bit 7
9. OE*: Output Enable (Active Low)
10. DIR: Direction Control
11. B0: Data Bus B Bit 0
12. B1: Data Bus B Bit 1
13. B2: Data Bus B Bit 2
14. B3: Data Bus B Bit 3
15. B4: Data Bus B Bit 4
16. B5: Data Bus B Bit 5
17. B6: Data Bus B Bit 6
18. B7: Data Bus B Bit 7
19. GND: Ground
20. VCC: Supply Voltage

Functional Features

The SN74LS641-1DW offers the following functional features:

• Bidirectional data transfer between two buses or systems.
• Tri-state outputs allow for high impedance when not enabled, preventing bus contention.
• Direction control pin (DIR) determines the direction of data flow.
• Output enable pin (OE*) enables or disables the outputs.

Advantages and Disadvantages

Advantages

• High-speed propagation delay allows for efficient data transfer.
• Low power consumption minimizes energy usage.
• Wide operating temperature range makes it suitable for industrial applications.
• Tri-state outputs prevent bus conflicts.

Disadvantages

• Limited to octal (8-bit) data bus width.
• Requires external control signals for direction and output enable.

Working Principles

The SN74LS641-1DW operates based on the principles of digital logic. It uses a combination of transistors and logic gates to facilitate bidirectional data transfer. The direction control pin (DIR) determines whether data flows from bus A to bus B or vice versa. The output enable pin (OE*) enables or disables the outputs, allowing for high impedance when not enabled to prevent bus contention.

Detailed Application Field Plans

The SN74LS641-1DW finds applications in various fields, including:

1. Microprocessor-based systems
2. Data communication systems
3. Industrial automation
4. Automotive electronics
5. Embedded systems

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the SN74LS641-1DW include:

1. SN74LS245: Octal bus transceiver with tri-state outputs.
2. SN74HC640: Octal bus transceiver with 3-state outputs.
3. SN74HCT646: Octal bus transceiver and register with 3-state outputs.

These alternative models can be considered based on specific requirements and compatibility with existing systems.

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