The DP8216N is a bipolar 4-bit Bi-Directional Bus Transceiver manufactured by National Semiconductor (now Texas Instruments). This device is designed to facilitate bidirectional data transfer between two buses. It is commonly used in microprocessor systems and other digital applications where isolation and controlled data flow are required.

Applications

• Microprocessor systems
• Memory interface
• Peripheral device interface
• Data bus isolation
• Bidirectional data transfer

Features

• 4-Bit Bidirectional: Transfers data in both directions.
• 3-State Outputs: Allows either bus to be isolated.
• High Speed: Offers fast propagation delays.
• TTL Compatible: Compatible with standard TTL logic levels.
• Low Input Loading: Minimizes loading on connected buses.

Benefits

• Simplified Bus Interface: Simplifies the connection between two buses.
• Improved System Performance: Reduces loading on data buses.
• Flexible Data Transfer: Enables bidirectional data flow.
• Easy Implementation: TTL compatibility simplifies design.
• Controlled Data Flow: Isolates buses when required, preventing data contention.

Additional Details

The DP8216N is typically packaged in a 20-pin DIP. It requires control inputs to determine the direction of data transfer and to enable or disable the transceiver. The datasheet provides detailed information on timing characteristics (propagation delays), voltage and current levels, and operating temperature range. The control pins determine which bus is driving the other, or if both buses are isolated.