20 LCD Display for Single Phase Electronic Meter HT16C22 Characteristics VDD = 4.7V ( Full Range : 2.4V ~ 5.5V ) VLCD = 4.7V ( VLCD ≤ VDD ) I2C-bus Interface Display Dot : 33 Segment 4 Commons ( Maximum. 44 Segments 4 Commons ) Internal 16-step LCD Operating Voltage Adjustment Only a Few Components Required for the External Circuit Available Package Type : Dice, 48-pin LQFP, 52-pin QFP MCU Interface HT16C22 Application Areas Application Circuit Top Board Bottom Board