DM74ALS646NT

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Data Bus Transceiver
• Characteristics: High-speed, TTL compatible, 3-state outputs
• Package: DIP (Dual In-line Package)
• Essence: Facilitates bidirectional data transfer between two buses with different voltage levels
• Packaging/Quantity: Typically sold in reels of 250 units

Specifications

• Supply Voltage: 4.5V to 5.5V
• Input Voltage Levels: TTL compatible
• Output Voltage Levels: TTL compatible
• Maximum Operating Frequency: 100 MHz
• Number of Pins: 24
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

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. OEAB: Output Enable for Bus A
10. DIR: Direction Control
11. GND: Ground
12. VCC: Power Supply
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. B0: Data Bus B, Bit 0
21. OEBA: Output Enable for Bus B
22. NC: No Connection
23. NC: No Connection
24. VCC: Power Supply

Functional Features

• Bidirectional data transfer between two buses with different voltage levels
• TTL compatible inputs and outputs
• High-speed operation
• 3-state outputs allow multiple devices to share the same bus

Advantages

• Enables seamless communication between buses operating at different voltage levels
• Supports high-speed data transmission
• Compatible with TTL logic levels, making it easy to integrate into existing systems
• 3-state outputs provide flexibility in bus sharing scenarios

Disadvantages

• Limited to bidirectional data transfer only
• Requires careful consideration of voltage level compatibility between buses

Working Principles

The DM74ALS646NT is a bidirectional data bus transceiver that facilitates communication between two buses with different voltage levels. It operates by controlling the direction of data flow using the DIR pin. When DIR is set to logic high, data flows from Bus A to Bus B, and when DIR is set to logic low, data flows from Bus B to Bus A. The OEAB and OEBA pins control the output enable for each bus, allowing the device to be placed in a high-impedance state when not actively driving the bus.

Detailed Application Field Plans

The DM74ALS646NT is commonly used in various applications where bidirectional data transfer is required between buses operating at different voltage levels. Some typical application fields include: - Microprocessor interfacing - Communication systems - Industrial automation - Automotive electronics - Test and measurement equipment

Detailed and Complete Alternative Models

1. SN74ALS646: Similar functionality, but available in surface mount package (SOIC)
2. MC74ALS646: Equivalent functionality, but manufactured by a different vendor (Motorola)

Note: This entry provides a brief overview of the DM74ALS646NT. For more detailed information, please refer to the datasheet provided by the manufacturer.

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