topic PF8200 open drain pull up voltage in Power Management https://community.nxp.com/t5/Power-Management/PF8200-open-drain-pull-up-voltage/m-p/962663#M598 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>I am working on a design that uses the PF8200. RESETB_MCU, INTB, PGOOD, and FSOB are all open drain signals that the datasheet recommends pulling up to VDDIO. However, for my application, I would like to pull them to a slightly different voltage. Since these are all open drain outputs, I believe this is acceptable, but I was hoping someone from NXP could provide a little more direction. Here are my questions:</P><P></P><P>1. Does the voltage on VDDIO affect how high I can pull the open drain outputs? For example, if VDDIO is 1.8V, can I pull the open drain outputs to 3.3V and still get proper operation?</P><P>2. If VDDIO is 3.3V, can I pull the open drain outputs to 1.8V and still have them work properly?</P></BODY></HTML> Thu, 22 Aug 2019 20:35:23 GMT adevries 2019-08-22T20:35:23Z PF8200 open drain pull up voltage https://community.nxp.com/t5/Power-Management/PF8200-open-drain-pull-up-voltage/m-p/962663#M598 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>I am working on a design that uses the PF8200. RESETB_MCU, INTB, PGOOD, and FSOB are all open drain signals that the datasheet recommends pulling up to VDDIO. However, for my application, I would like to pull them to a slightly different voltage. Since these are all open drain outputs, I believe this is acceptable, but I was hoping someone from NXP could provide a little more direction. Here are my questions:</P><P></P><P>1. Does the voltage on VDDIO affect how high I can pull the open drain outputs? For example, if VDDIO is 1.8V, can I pull the open drain outputs to 3.3V and still get proper operation?</P><P>2. If VDDIO is 3.3V, can I pull the open drain outputs to 1.8V and still have them work properly?</P></BODY></HTML> Thu, 22 Aug 2019 20:35:23 GMT https://community.nxp.com/t5/Power-Management/PF8200-open-drain-pull-up-voltage/m-p/962663#M598 adevries 2019-08-22T20:35:23Z Re: PF8200 open drain pull up voltage https://community.nxp.com/t5/Power-Management/PF8200-open-drain-pull-up-voltage/m-p/962664#M599 <HTML><HEAD></HEAD><BODY><P>HI </P><P>Please see comment:</P><P>1. Does the voltage on VDDIO affect how high I can pull the open drain outputs? For example, if VDDIO is 1.8V, can I pull the open drain outputs to 3.3V and still get proper operation?</P><P>[gw]Yes,you can!</P><P>2. If VDDIO is 3.3V, can I pull the open drain outputs to 1.8V and still have them work properly?</P><P>[gw]Yes,you can!</P></BODY></HTML> Fri, 23 Aug 2019 07:50:55 GMT https://community.nxp.com/t5/Power-Management/PF8200-open-drain-pull-up-voltage/m-p/962664#M599 guoweisun 2019-08-23T07:50:55Z