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