The HT1621B is a surface mount 128 pattern (324), memory mapping, and multi-function LCD driver in a SSOP48 package.
Features:
Operating voltage : 2.4V~5.2V
Built-in 256kHz RC oscillator
External 32.768kHz crystal or 256kHz frequency source input
Selection of 1/2 or 1/3 bias, and selection of 1/2 or 1/3 or 1/4 duty LCD applications
Internal time base frequency sources
Two selectable buzzer frequencies (2kHz/4kHz)
WARNING
