Description

The ICM7231 and ICM7232 family of integrated circuits are designed to generate the voltage levels and switching wave forms required to drive triplexed liquid-crystal displays. These chips also include input buffer and digit address decoding circuitry allowing six bits of input data to be decoded into 64 independent combinations of the output segments of the selected digit.

Features

• ICM7231 Drives 8 Digits of 7 Segments with Two Independent Annunciators Per Digit Address and Data Input in Parallel Format

• ICM7232 Drives 10 Digits of 7 Segments with Two Independent Annunciators Per Digit Address and Data Input in Serial Format

• All Signals Required to Drive Rows and Columns of Triplexed LCD Display are Provided

• Display Voltage Independent of Power Supply

• On-Chip Oscillator Provides All Display Timing

• Total Power Consumption Typically 200µW, Maximum 500µW at 5V

• Low-Power Shutdown Mode Retains Data With 5µW Typical Power Consumption at 5V, 1µW at 2V

• Direct Interface to High-Speed Microprocessors