SN74LS623DWRE4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Digital Logic
• Characteristics: 8-bit Bus Transceiver
• Package: SOIC-20
• Essence: Bidirectional data transfer between two buses
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 4.75V to 5.25V
• High-Level Input Voltage: 2V
• Low-Level Input Voltage: 0.8V
• High-Level Output Voltage: 2.7V
• Low-Level Output Voltage: 0.5V
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 9ns (max)
• Output Current: ±24mA

Detailed Pin Configuration

The SN74LS623DWRE4 has a total of 20 pins, which are assigned as follows:

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

Functional Features

The SN74LS623DWRE4 is an 8-bit bus transceiver that allows bidirectional data transfer between two buses. It features a direction control input (DIR) and an output enable input (OE) to control the data flow. When DIR is high, data is transferred from Bus A to Bus B, and when DIR is low, data is transferred from Bus B to Bus A. The OE input enables or disables the outputs.

Advantages and Disadvantages

Advantages: - Bidirectional data transfer capability - High-speed operation with a propagation delay of only 9ns - Wide operating temperature range (-40°C to +85°C) - High output current capacity

Disadvantages: - Requires external control signals for direction and output enable

Working Principles

The SN74LS623DWRE4 operates based on the principles of digital logic. The direction control input (DIR) determines the direction of data transfer, while the output enable input (OE) enables or disables the outputs. When DIR is high, the internal circuitry connects Bus A to Bus B, allowing data to flow from A to B. Conversely, when DIR is low, the connection is reversed, enabling data transfer from B to A. The OE input controls whether the outputs are active or in a high-impedance state.

Detailed Application Field Plans

The SN74LS623DWRE4 is commonly used in various applications where bidirectional data transfer between two buses is required. Some specific application fields include:

1. Microprocessor Systems: The IC facilitates communication between the microprocessor and peripheral devices, such as memory modules and input/output interfaces.
2. Data Communication Networks: It can be used in network switches and routers to enable data transfer between different network segments.
3. Industrial Automation: The IC is suitable for controlling data flow between various components in industrial automation systems, such as PLCs (Programmable Logic Controllers) and sensors.
4. Automotive Electronics: It finds applications in automotive control units, allowing data exchange between different subsystems within a vehicle.

Detailed and Complete Alternative Models

1. SN74LS623N: DIP-20 package variant of the SN74LS623DWRE4.
2. SN74LS623D: SOIC-20 package variant without the "WRE4" suffix.
3. SN74LS623DR: SOIC-20 package variant with a different reel packaging quantity (2000 units per reel).

These alternative models offer similar functionality and can be used as substitutes for the SN74LS623DWRE4 depending on specific requirements and availability.

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