John J. Gordon

'908AB32 Power Supplies

Discussion created by John J. Gordon on Mar 9, 2007
Latest reply on Mar 13, 2007 by John J. Gordon
I am interested in understanding if there is any compelling reason to provide power to the analog section of the Clock Generator Module (CGM) or Analog-to-Digital Converter (ADC) section of the HC908AB32 if my application does not make use of the PLL or the ADC? If it is not necessary to power the unused modules, should the associated power, reference and ground pins be left all unterminated, all terminated to Vss or some combination?

Additionally - Is there any reason to provide the external filter capacitor for the CGM PLL (pin CGMXFC) if the PLL is unused and off?

I look forward to knowledgable replies and thank you in advance.