CM2031-A0TR Ver la hoja de datos (PDF) - California Micro Devices Corp

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Fabricante

CM2031-A0TR

HDMI Receiver PortProtectionand Interface Device

California Micro Devices Corp 

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 MediaGuardTM,and traces between

MediaGuardTM and Connector should be tuned to match

chip/connector IBIS parasitics. (See MediaGuardTM

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 MediaGuardTM 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 VCEC power supply pin for the slew-rate

limiting circuitry. This can be supplied by a 0Ω jumper to VCEC

which should be depopulated to utilize the CM2020. The

100nF CBYP is recommended for all applications.

© 2007 California Micro Devices Corp. All rights reserved.

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490 N. McCarthy Blvd., Milpitas, CA 95035-5112 ● Tel: 408.263.3214 ● Fax: 408.263.7846 ● www.cmd.com 07/10/07

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