Other NXP ProductsのトピックRe: Severe PCA9507 problem !!!! https://community.nxp.com/t5/Other-NXP-Products/Severe-PCA9507-problem/m-p/782578#M5952 <HTML><HEAD></HEAD><BODY><P>What are the B side of U1/6 connection? Do they connect with signal source?</P></BODY></HTML> Tue, 04 Sep 2018 07:56:07 GMT guoweisun 2018-09-04T07:56:07Z Severe PCA9507 problem !!!! https://community.nxp.com/t5/Other-NXP-Products/Severe-PCA9507-problem/m-p/782573#M5947 <HTML><HEAD></HEAD><BODY><P>Title: Phantom clocks</P><P>Severe&nbsp;PCA9507 problem !!!! - #Phantom clocks</P><P>We have received a new batch of produced cards with PCA9507 assembled and observed that sometimes Phantom clocks are generated by the device on the A side (blue) (master connected on the B side(red) !</P><P>please see attached picture .</P><P>This did not happen in the previous batch of cards. No BOM changes were applied.</P><P>Did anyone ever encounter such a problem /</P><P>Any hints/directions to follow?</P></BODY></HTML> Sun, 02 Sep 2018 17:20:18 GMT https://community.nxp.com/t5/Other-NXP-Products/Severe-PCA9507-problem/m-p/782573#M5947 ilanr 2018-09-02T17:20:18Z Re: Severe PCA9507 problem !!!! https://community.nxp.com/t5/Other-NXP-Products/Severe-PCA9507-problem/m-p/782574#M5948 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P>Please attach your picture again!</P></BODY></HTML> Mon, 03 Sep 2018 12:00:48 GMT https://community.nxp.com/t5/Other-NXP-Products/Severe-PCA9507-problem/m-p/782574#M5948 guoweisun 2018-09-03T12:00:48Z Re: Severe PCA9507 problem !!!! https://community.nxp.com/t5/Other-NXP-Products/Severe-PCA9507-problem/m-p/782575#M5949 <HTML><HEAD></HEAD><BODY><P>Please find picture attached</P><P>Also the main part of the electronic scheme</P><P>Thank you</P></BODY></HTML> Mon, 03 Sep 2018 12:08:08 GMT https://community.nxp.com/t5/Other-NXP-Products/Severe-PCA9507-problem/m-p/782575#M5949 ilanr 2018-09-03T12:08:08Z Re: Severe PCA9507 problem !!!! https://community.nxp.com/t5/Other-NXP-Products/Severe-PCA9507-problem/m-p/782576#M5950 <HTML><HEAD></HEAD><BODY><P>You schematic is unclear and from your test waveform the&nbsp; channel3/4 are 20.0v/div,something is wrong?</P></BODY></HTML> Tue, 04 Sep 2018 03:18:12 GMT https://community.nxp.com/t5/Other-NXP-Products/Severe-PCA9507-problem/m-p/782576#M5950 guoweisun 2018-09-04T03:18:12Z Re: Severe PCA9507 problem !!!! https://community.nxp.com/t5/Other-NXP-Products/Severe-PCA9507-problem/m-p/782577#M5951 <HTML><HEAD></HEAD><BODY><P>Probe was 1:10 but not updated in scope cfg. So it was actually 2V</P><P>Please see a better picture of the design.</P></BODY></HTML> Tue, 04 Sep 2018 05:33:57 GMT https://community.nxp.com/t5/Other-NXP-Products/Severe-PCA9507-problem/m-p/782577#M5951 ilanr 2018-09-04T05:33:57Z Re: Severe PCA9507 problem !!!! https://community.nxp.com/t5/Other-NXP-Products/Severe-PCA9507-problem/m-p/782578#M5952 <HTML><HEAD></HEAD><BODY><P>What are the B side of U1/6 connection? Do they connect with signal source?</P></BODY></HTML> Tue, 04 Sep 2018 07:56:07 GMT https://community.nxp.com/t5/Other-NXP-Products/Severe-PCA9507-problem/m-p/782578#M5952 guoweisun 2018-09-04T07:56:07Z Re: Severe PCA9507 problem !!!! https://community.nxp.com/t5/Other-NXP-Products/Severe-PCA9507-problem/m-p/782579#M5953 <HTML><HEAD></HEAD><BODY><P>B side of U1 are pins 6 and 7</P><P>They are connected to the signal source (bus master)</P><P>U6 B side is also connected in parallel to the bus master, however, the Enable signals ensure that only one buffer is active</P></BODY></HTML> Tue, 04 Sep 2018 07:59:10 GMT https://community.nxp.com/t5/Other-NXP-Products/Severe-PCA9507-problem/m-p/782579#M5953 ilanr 2018-09-04T07:59:10Z Re: Severe PCA9507 problem !!!! https://community.nxp.com/t5/Other-NXP-Products/Severe-PCA9507-problem/m-p/782580#M5954 <HTML><HEAD></HEAD><BODY><P>Hi </P><P>I note your U1/6&nbsp; A sides have different of series resistors value and different pull up resistors value.</P><P>Do you change cross the issue product and good product with their PCA9507 to check the fucntion?</P></BODY></HTML> Thu, 06 Sep 2018 02:23:48 GMT https://community.nxp.com/t5/Other-NXP-Products/Severe-PCA9507-problem/m-p/782580#M5954 guoweisun 2018-09-06T02:23:48Z Re: Severe PCA9507 problem !!!! https://community.nxp.com/t5/Other-NXP-Products/Severe-PCA9507-problem/m-p/782581#M5955 <HTML><HEAD></HEAD><BODY><P>Each side A is connected to a different bus segment with different devices. The terminations and PU are best fitted to the devices on the specific bus segment</P></BODY></HTML> Thu, 06 Sep 2018 05:14:49 GMT https://community.nxp.com/t5/Other-NXP-Products/Severe-PCA9507-problem/m-p/782581#M5955 ilanr 2018-09-06T05:14:49Z