CM2030 Datasheet, PDF (12/14 Pages) California Micro Devices Corp – HDMI Transmitter Port Protection and Interface Device

Application Information
CM2030
5V_SUPPLY
R_{OPT(See NOTE 4)}
5V_OUT
LV_SUPPLY
NOTE 1
{
TMDS_D2+
TMDS_D2–
TMDS_D1+
TMDS_D1–
TMDS_D0+
TMDS_D0–
TMDS_CK+
TMDS_CK–
ASIC_CEC2
ASIC_SCL2
ASIC_SDA2
HOTPLUG_DETECT2
D_CEC
V_CEC
CM2020/2030
1
38
2
37
3
36
4
35
5
34
6
33
7
32
8
31
9
30
10
29
11
28
12
27
13
26
14
25
15
24
16
23
17
22
18
21
19
20
NOTE 3
V_CEC
C_BYP
100nF
TMDS_D2+
TMDS_GND
TMDS_D2–
TMDS_D1+
TMDS_GND
TMDS_D1–
TMDS_D0+
TMDS_GND
TMDS_D0–
TMDS_CK+
TMDS_GND
TMDS_CK–
CE_REMOTE
N/C
DDC_CLK
DDC_DAT
GND
+5V OUT
HOTPLUG_DET
R_CEC
27kΩ
R_DAT
2kΩ
R_SCL
2kΩ
R_PD C_HP
15kΩ 100nF
C_VOUT
100nF
HDMI
Connector
Figure 9. Typical Application for CM2030
LAYOUT NOTES
1 _{Differential TMDS Pairs should be designed as}
normal 100Ω HDMI Microstrip. Single Ended
(decoupled) TMDS traces underneath Media-
Guard^TM, and traces between MediaGuard^TM and
Connector should be tuned to match chip/connec­
tor 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 pos­}
sible, and as with any controlled impedance line always
avoid placing any silk-screen printing over TMDS
traces.
4 _{CM2020/CM2030 footprint compatibility. For the}
CM2030, 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 uti­
lize the CM2020. The 100nF C_BYP is recommended for
all applications.
© 2007 California Micro Devices Corp. All rights reserved.
12
490 N. McCarthy Blvd., Milpitas, CA 95035-5112 ●Tel: [phone] ●Fax: [phone] ●www.cmd.com
Issue A – 11/16/07