SN74AS646DWRE4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Data Bus Transceiver
• Characteristics: High-speed, bidirectional, non-inverting, 3-state transceiver
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Efficient data transfer between two buses with different voltage levels
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 6ns (typical)
• Output Current: ±24mA
• Number of Pins: 20

Detailed Pin Configuration

1. A1: Data Bus A, Bit 1
2. A2: Data Bus A, Bit 2
3. A3: Data Bus A, Bit 3
4. A4: Data Bus A, Bit 4
5. A5: Data Bus A, Bit 5
6. A6: Data Bus A, Bit 6
7. A7: Data Bus A, Bit 7
8. A8: Data Bus A, Bit 8
9. GND: Ground
10. OE*: Output Enable Input
11. DIR: Direction Control Input
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. B8: Data Bus B, Bit 8
20. VCC: Supply Voltage

Functional Features

• Bidirectional data transfer between two buses with different voltage levels
• Non-inverting logic ensures compatibility with various systems
• 3-state outputs allow multiple devices to share the same bus
• High-speed operation for efficient data transmission

Advantages and Disadvantages

Advantages: - Efficient and reliable data transfer between different voltage level buses - Non-inverting logic ensures compatibility with a wide range of systems - High-speed operation allows for fast data transmission

Disadvantages: - Limited number of input/output pins restricts the number of data bits that can be transferred simultaneously - Requires careful consideration of voltage level compatibility between buses

Working Principles

The SN74AS646DWRE4 is a bidirectional data bus transceiver designed to facilitate communication between two buses operating at different voltage levels. It uses non-inverting logic, ensuring compatibility with various systems. The direction of data flow is controlled by the DIR pin, while the OE* pin enables or disables the output. The 3-state outputs allow multiple devices to share the same bus without interfering with each other.

Detailed Application Field Plans

1. Interfacing between microcontrollers operating at different voltage levels
2. Communication between digital signal processors and memory modules
3. Data transfer between FPGA (Field-Programmable Gate Array) and external peripherals
4. Integration into communication protocols such as I2C, SPI, or UART

Detailed and Complete Alternative Models

1. SN74AS646DWR: Similar specifications and features, but available in a different package (SOIC)
2. SN74LS646N: Lower speed version with similar functionality, but operates at a lower frequency
3. SN74HC646N: High-speed CMOS version with improved power efficiency and wider voltage range

(Note: The above alternative models are provided for reference and may have slight variations in specifications. It is recommended to consult the manufacturer's datasheets for detailed information.)

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