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The 8243 is an input/output device specifically designed to furnish input/output expansion capabilities for the INS8048, INS8049, and NSB050 single-chip microcomputer family. The 8243 is fabricated using XMOSTM (high-density N-channel silicon gate) technology operates from a single 5V supply and is TTL compatible. It is housed in a 24- pin, dual-in-line package and provides high drive current capabilities at low cost.
8243 Pinout
8243 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | P50 | Port Pin 50 |
| 2 | P40 | Port Pin 40 |
| 3 | P41 | Port Pin 41 |
| 4 | P42 | Port Pin 42 |
| 5 | P43 | Port Pin 43 |
| 6 | CS’ | Chip Select |
| 7 | PROG | Programing Pin |
| 8 | P23 | Port Pin 23 |
| 9 | P22 | Port Pin 22 |
| 10 | P21 | Port Pin 21 |
| 11 | P20 | Port Pin 20 |
| 12 | GND | Ground Pin |
| 13 | P70 | Port Pin 70 |
| 14 | P71 | Port Pin 71 |
| 15 | P72 | Port Pin 72 |
| 16 | P73 | Port Pin 73 |
| 17 | P63 | Port Pin 63 |
| 18 | P62 | Port Pin 62 |
| 19 | P61 | Port Pin 61 |
| 20 | P60 | Port Pin 60 |
| 21 | P53 | Port Pin 53 |
| 22 | P52 | Port Pin 52 |
| 23 | P51 | Port Pin 51 |
| 24 | VCC | Supply Voltage |
8243 Key Features
- XMOS technology
- Single 5V supply
- Low cost 1/0 expansion
- Easy interface with INS8048/49/50 microcomputers
- High fanout capability
- 24-Pin DIP
- Direct extension of IB048/49/50 1/O ports
You can download this datasheet for 8243 I/O Expander – Datasheet from the link given below:
