ht16561,ht 16561b ( 44 qfp) vfd 汽车时钟 驱动芯片

ht16561 & ht 16561b ( 44 qfp)

vfd digital clock

features:
vfd display 12 hour clock function
4.194304mhz crystal oscillation
zero adjust function
integrated voltage regulator permits wide 4v to 16v
operating voltage range
four level contrast control function
44-pin qfp package

general description
the ht16561 provides direct drive to vfd panels to im-plement 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.

盛群半导体(holtek)推出ht1656x系列数字频率ic，该系列ic工作电压范围广(4v～18v)、产品种类多样、功能齐全、外接电路少，可利用汽车上的电源直接驱动荧光显示面板( vfd)。 

        ht1656x系列ic客户多款选择，依面板驱动方式分为静态显示型ht16561、ht16565及1/2 duty动态扫瞄型ht16562、ht16566，依时间显示方式分为12小时制(ht16561、ht16562)及24小时制(ht16565、ht16566)，12小时制又可带有am/pm显示功能(ht16561)。 

        全系列均4阶段亮度调整、独立的时/分校正及30分钟舍入调整功能。外接电路少，只需外接4.194304mhz石英震荡器及2颗振荡电容即可起振，可直接驱动荧光显示面板(vfd)。盛群的数字频率ic亦可搭配使用boe 的 荧光显示面板 vfd (vfd 20-0106n，hl-d265dw)。