SC138 is a 32k byte I2C bus memory card.

The memory card contains a 24LC256 (32k by 8 bit) EEPROM. This device can store 32k bytes of data and then retain that data without power.

The device uses a simple 5 volt I2C bus to read and write the data.

The goal is to add SAVE and LOAD functions to the Small Computer Monitor (SCM) and ROM BASIC.

The main features of this design are:

• I2C bus compatible (5 volts)
• 32k by 8 bit non-volatile memory
• Low cost
• Compatible with SC126 and SC137