MCB148 or USB148  High-Density Digital I/O and Timer Microcontroller 53 user-controllable TTL-level I/O lines Timers/counters, switches/LEDs 10-bit single-ended/differential A/D Two RS232 serial ports, 1 each I2C and SPI bus interfaces MCB148 and USB148 are the same product. Part numbers are used interchangeably. Documentation can be used interchangeably.

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