Other NXP ProductsのトピックRe: Question about PCA9517ADP https://community.nxp.com/t5/Other-NXP-Products/Question-about-PCA9517ADP/m-p/506980#M3548 <HTML><HEAD></HEAD><BODY><P>In many of your I2C-bus repeater ICs, such as PCA9507, PCA9515A, PCA9518A, etc,</P><P>VOL(LOW-level output voltage) is stipulated as less than 0.6V even if official I2C(SMBus) spec requires it to be less than 0.4V.</P><P></P><P>What is the rationale behind this <STRONG>mismatch with SMBus specification</STRONG>??</P></BODY></HTML> Tue, 17 May 2016 12:17:38 GMT paulpearson 2016-05-17T12:17:38Z Question about PCA9517ADP https://community.nxp.com/t5/Other-NXP-Products/Question-about-PCA9517ADP/m-p/506979#M3547 <HTML><HEAD></HEAD><BODY><P>(I attach pics and resend.)</P><P></P><P>I have a question that need your view about your "Level translating I2C-bus repeater", p/n : PCA9517ADP.</P><P></P><P>Why is the maximum VOL of Input and Output SDAB and SCLB is 0.6V in your Product data sheet - Table 5, page 10 (below) ?</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_0.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/57077i00BB92E827597096/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_0.png" alt="pastedImage_0.png" /></span></P><P>when the maximum voltage in Std I2C mode device is specified as 0.4V (which means VOL should be less than 0.4V to be LOW level) in the SMBus Specification of the following URL - Table 10, page 57 (below).</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_1.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/57089i5FEE6BEDC6DAC83C/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P><P></P><P><SPAN>&nbsp; SMBus Specification URL : </SPAN><A class="jive-link-external-small" href="https://community.freescale.com/external-link.jspa?url=http%3A%2F%2Fsmbus.org%2Fspecs%2Fsmbus20.pdf" rel="nofollow" target="_blank">http://smbus.org/specs/smbus20.pdf</A></P><P></P><P>This would sound your spec 0.6V max is out of the specification.</P><P>Could you make me clear about it?</P></BODY></HTML> Sat, 07 May 2016 00:37:44 GMT https://community.nxp.com/t5/Other-NXP-Products/Question-about-PCA9517ADP/m-p/506979#M3547 paulpearson 2016-05-07T00:37:44Z Re: Question about PCA9517ADP https://community.nxp.com/t5/Other-NXP-Products/Question-about-PCA9517ADP/m-p/506980#M3548 <HTML><HEAD></HEAD><BODY><P>In many of your I2C-bus repeater ICs, such as PCA9507, PCA9515A, PCA9518A, etc,</P><P>VOL(LOW-level output voltage) is stipulated as less than 0.6V even if official I2C(SMBus) spec requires it to be less than 0.4V.</P><P></P><P>What is the rationale behind this <STRONG>mismatch with SMBus specification</STRONG>??</P></BODY></HTML> Tue, 17 May 2016 12:17:38 GMT https://community.nxp.com/t5/Other-NXP-Products/Question-about-PCA9517ADP/m-p/506980#M3548 paulpearson 2016-05-17T12:17:38Z