CM2031 Datasheet, PDF (12/14 Pages) California Micro Devices Corp – HDMI Receiver Port Protection and Interface Device

Application Information
Issue X-1
CM2031
Figure 10. Typical Application for CM2031
LAYOUT NOTES
1 _{Differential TMDS Pairs should be designed as normal}
100Ω HDMI Microstrip. Single Ended (decoupled) TMDS
traces underneath MediaGuard^TM,and traces between
MediaGuard^TM and Connector should be tuned to match
chip/connector IBIS parasitics. (See MediaGuard^TM
Layout Application Notes.)
2 _{Level Shifter signals should be biased with a weak pullup to}
the desired local LV_SUPPLY. If the local ASIC includes
sufficient pullups to register a logic high, then external
pullups may not be needed.
3 _{Place MediaGuard}TM _{as close to the connector as possible,}
and as with any controlled impedance line always avoid
placing any silkscreen printing over TMDS traces.
4 _{CM2020/CM2031 footprint compatibility. For the CM2031,}
Pin 37 becomes the V_CEC power supply pin for the slew-rate
limiting circuitry. This can be supplied by a 0Ω jumper to V_CEC
which should be depopulated to utilize the CM2020. The
100nF C_BYP is recommended for all applications.
© 2007 California Micro Devices Corp. All rights reserved.
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