CM2031 Datasheet, PDF (13/14 Pages) California Micro Devices Corp – HDMI Receiver Port Protection and Interface Device

Issue X-1
CM2031
Application Information
Design Considerations
DUT On vs. DUT Off
Many HDMI CTS tests require a power off condition on
the System Under Test. Many discrete ESD diode
configurations can be forward baised when their VDD
rail is lower than the I/O pin bias, thereby exhibiting
extremely high apparent capacitance measurements,
for example. The MediaGuard^ΤΜ backdrive isolation
circuitry limits this current to less than 5μA, and will
help ensure HDMI compliance.
PLEASE REVIEW ALL OF THE CURRENT HDMI DESIGN GUIDELINES AVAILABLE AT
http://www.calmicro.com/applications/customer/downloads/current-cmd-mediaguard-design-guidelines.zip
© 2007 California Micro Devices Corp. All rights reserved.
07/10/07
490 N. McCarthy Blvd., Milpitas, CA 95035-5112 ●Tel: [phone] ●Fax: [phone] ●www.cmd.com 13