DM74ALS245AMSA

Product Overview

• Category: Integrated Circuit (IC)
• Use: Signal Transceiver
• Characteristics: High-speed, TTL-compatible, bidirectional data transfer
• Package: Surface Mount
• Essence: Transfers data between two buses with different voltage levels
• Packaging/Quantity: 20 pieces per tube

Specifications

• Logic Family: Advanced Low-Power Schottky (ALS)
• Number of Channels: 8
• Input Voltage Levels: 0.8V to 2.0V (Low), 2.0V to 5.5V (High)
• Output Voltage Levels: 0.4V (Low), 2.4V (High)
• Propagation Delay: 9ns (Max)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The DM74ALS245AMSA has a total of 20 pins, which are assigned as follows:

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

Functional Features

• Bidirectional data transfer between two buses
• High-speed operation with TTL compatibility
• Output enable control for tristate outputs
• Direction control for data flow selection
• Wide operating voltage range for compatibility

Advantages and Disadvantages

Advantages: - High-speed data transfer - Compatibility with TTL logic levels - Tristate outputs for easy bus sharing - Wide operating voltage range

Disadvantages: - Limited number of channels (8) - Propagation delay may affect timing-sensitive applications

Working Principles

The DM74ALS245AMSA is a bidirectional signal transceiver IC that allows data transfer between two buses with different voltage levels. It operates by controlling the direction of data flow using the DIR pin. When the DIR pin is set to a specific logic level, the data is transferred from one bus to the other.

The OE pin enables or disables the outputs, allowing tristate operation. This feature is useful when multiple devices share the same bus, as it prevents conflicts and ensures proper data transfer.

The IC is designed to operate at high speeds and is compatible with TTL logic levels. It can handle a wide range of input and output voltage levels, making it suitable for various applications.

Detailed Application Field Plans

The DM74ALS245AMSA is commonly used in digital systems where data needs to be transferred between buses operating at different voltage levels. Some typical application fields include:

1. Microprocessor interfacing
2. Data communication systems
3. Industrial automation
4. Automotive electronics
5. Test and measurement equipment

Detailed and Complete Alternative Models

1. SN74ALS245A - Texas Instruments
2. MC74ALS245 - ON Semiconductor
3. CD74ALS245 - Texas Instruments
4. 74ALS245 - Fairchild Semiconductor
5. HD74ALS245A - Renesas Electronics

These alternative models offer similar functionality and can be used as replacements for the DM74ALS245AMSA in various applications.

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