The Fujitsu MBL 8243 is an input/output expander fabricated in 5 volts NMOS technology. It provides four 4-bit bidirectional static I/O ports and a 4-bit interface specifically designed for the MBL 8048 series of single-chip microcomputers. The device allows multiple units to be added to the same bus using only four I/O lines from the host processor.
| Technology Process | 5 volts NMOS |
|---|---|
| Number of I/O Ports | Four 4-bit bidirectional static I/O ports |
| Supply Voltage | +5 V |
| Output Low Voltage (IOL = 5mA) | 0.45 V |
| Operating Temperature Range | Ota +70 °c |
| Package Options | 24-pin Cerdip or Plastic DIP |
It is designed specifically to provide I/O expansion for the MBL 8048 series of single-chip microcomputers.
Only four I/O lines of the MBL 8048/8049/8749 are used for I/O expansion.
The device is available in a Standard 24-pin Cerdip (Suffix: Z) or a Standard 24-pin Plastic DIP (Suffix: M).