Document
CM2021 HDMI Receiver Port Protection and Interface Device
Features
• • • • • 0.05pF matching capacitance between the TMDS intra-pair Level shifting circuitry, including ±8kV ESD protection on all TMDS lines Matched 0.5mm trace spacing (TSSOP) Simplified layout for HDMI connectors Backdrive protection
Product Description
The CM2021 HDMI Receiver Port Protection and Interface Device is specifically designed for next generation HDMI Host interface protection. An integrated package provides all ESD, level shift and backdrive protection for an HDMI port in a single 38Pin TSSOP package. The CM2021 part is specifically designed to complement the CM2020 protection part in HDMI receivers (Displays, CE devices, etc.)
Applications
• • • • PC Consumer Electronics Set Top Box Displays and Digital Television
Electrical Schematic
TMDS_BYP 5V_SUPPLY TMDS_D2+ TMDS_GND TMDS_D2TMDS_D1+ TMDS_GND TMDS_D1TMDS_D0+ TMDS_GND TMDS_D0TMDS_CK+ TMDS_GND TMDS_CK-
3.3V SUPPLY
TMDS_BYP
3.3V SUPPLY
TMDS_BYP
CE_REMOTE_IN
CE_REMOTE_OUT
DDC_DAT_IN
DDC_DAT_OUT
3.3V SUPPLY
TMDS_BYP
3.3V SUPPLY
TMDS_BYP
DDC_CLK_IN
DDC_CLK_OUT
HOTPLUG_DET_IN
HOTPLUG_DET_OUT
© 2005 California Micro Devices Corp. All rights reserved. 03/22/05
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
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Tel: 408.263.3214
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Fax: 408.263.7846
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www.calmicro.com
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CM2021
PACKAGE / PINOUT DIAGRAM
TOP VIEW
5V_SUPPLY 3.3V_SUPPLY GND TMDS_D2+ TMDS_GND NC TMDS_D1+ TMDS_GND NC TMDS_D0+ TMDS_GND NC TMDS_CK+ TMDS_GND NC CE_REMOTE_IN DDC_CLK_IN DDC_DAT_IN HOTPLUG_DET_IN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 NC TMDS_BYP GND NC TMDS_GND TMDS_D2NC TMDS_GND TMDS_D1NC TMDS_GND TMDS_D0NC TMDS_GND TMDS_CKCE_REMOTE_OUT DDC_CLK_OUT DDC_DAT_OUT HOTPLUG_DET_OUT
38-PIN TSSOP PACKAGE
Note: This drawing is not to scale.
PIN DESCRIPTIONS
PINS 37 NAME TMDS_BYP DESCRIPTION This input pin is used to connect an optional external 0.1uF ceramic bypass capacitor only to enhance the ESD protection level. Note: Do not connect this pin to GND or any power rail. TMDS 0.9pF ESD protection. TMDS 0.9pF ESD protection. TMDS 0.9pF ESD protection. TMDS 0.9pF ESD protection. TMDS 0.9pF ESD protection. TMDS 0.9pF ESD protection. TMDS 0.9pF ESD protection. TMDS 0.9pF ESD protection. 3.3V_SUPPLY referenced logic level in. 5V_SUPPLY referenced logic level out plus 3.5pF ESD. 3.3V_SUPPLY referenced logic level in. 5V_SUPPLY referenced logic level out plus 3.5pF ESD. 3.3V_SUPPLY referenced logic level in. 5V_SUPPLY referenced logic level out plus 3.5pF ESD. 3.3V_SUPPLY referenced logic level in. 5V_SUPPLY referenced logic level out plus 3.5pF ESD. Bias for CE / DDC / HOTPLUG level shifters. Bias for CE / DDC / HOTPLUG level shifters plus current source for 5V_OUT. No connect. GND reference.
4 33 7 30 10 27 13 24 16 23 17 22 18 21 19 20 2 1 6, 9, 12, 15, 26, 29, 32, 35, 38 3, 5, 8, 11, 14, 25, 28, 31, 34, 36
TMDS_D2+ TMDS_D2TMDS_D1+ TMDS_D1TMDS_D0+ TMDS_D0TMDS_CK+ TMDS_.