D8251A Programmable Communication Interface DIP-28
The D8251A is a programmable communication interface (USART) designed to handle both synchronous and asynchronous serial data communication in microprocessor-based systems. It acts as a bridge between parallel data buses and serial communication lines, offering flexible configuration for data format, baud rate, parity, and stop bits. Packaged in a standard DIP-28, the D8251A is widely used with classic microprocessors such as 8080, 8085, and 8086 families. Its built-in transmitter and receiver, along with programmable control registers, make it ideal for reliable serial communication in embedded, industrial, and legacy computing applications.
Features
- Supports both asynchronous and synchronous communication modes.
- Programmable baud rate, character length, parity, and stop bits.
- Full-duplex operation with independent transmitter and receiver.
- Compatible with Intel 8080/8085/8086 microprocessor systems.
- Internal control and status registers for flexible configuration.
- Error detection including parity, overrun, and framing errors.
- Standard DIP-28 package for through-hole mounting.
PINOUT
Specifications
| Specification | Value |
| Package | DIP-28 |
| Data Rate | 64KBd |
| Maximum Input Current | 100mA |
| Number of Channels per Chip | 1 |
| Family | 8251A |
| Transmitter and Receiver FIFO Counter | No |
| Minimum Input Voltage | 4.5V |
| Input Voltage | 5V |
| Maximum Input Voltage | 5.5V |
| Minimum Operating Temperature | 0°C |
| Maximum Operating Temperature | 70°C |
| Mounting | Through Hole |
| Pins | 28 |
| Product Type | USART |
Documents
| Datasheet | 8251A |