HT16561(2007) Datasheet PDF - Holtek Semiconductor

General Description
The HT16561 provides direct drive to VFD panels to implement a 12 hour clock function. In addition to obtaining its time base from a 4.194304MHz crystal oscillation source and in having a wide operating voltage, the device also contains a host of other features. These include a choice of adjustment modes, including single push increment or 2Hz fast forward functions. Additional features are provided in the form of Zero adjustment and four levels of contrast control.

FEATUREs
• VFD display 12 hour clock function
• 4.194304MHz crystal oscillation
• Zero adjust function
• Integrated voltage regulator permits wide 4V to 18V operating voltage range
• Four level contrast control function
• 44-pin QFP package