RClamp0544M
PROTECTION PRODUCTS
Applications Information (continued)
The HDMI Compliance Test Specification (CTS) requires
sink (receiver) ports maintain a differential impedance
of 100 Ohms +/- 15%. The measurement is taken
using a Time Domain Reflectometry (TDR) method that
utilizes a pulse with a risetime <= 200ps.
ESD protection devices have an inherent junction
capacitance. Even a small amount of added capaci-
tance on an HDMI port will cause the impedance of
B
PRELIMINARY
the differential pair to drop. As such, some form of
compensation to the layout will be required to bring
the differential pairs back within the required 100
Ohm +/- 15% range. The higher the added capaci-
tance, the more extreme the modifications will need to
be. If the added capacitance is too high, compensa-
tion may not even be possible. The RClamp0544M
presents <1pF capacitance between the pairs while
A
C
being rated to handle >8kV ESD contact discharges
(>15kV air discharge) as outlined in IEC 61000-4-2.
As such, it is possible to make minor adjustments to
the board layout parameters to compensate for the
X-axis
Y-axis
A
1.640
99.3
B
1.796
105.3
C
1.953
98.7
(nsec)
(Ohm)
added capacitance of the RClamp0544M. Figure 7
shows how to implement the RClamp0544M in an
HDMI application (transmitter and receiver). Figure 8
shows impedance test results using a Semtech evalua-
tion board with layout compensation. As shown, the
device meets the HDMI CTS impedance requirements.
1
1
Figure 8 - TDR Measurement using Semtech
Evaluation Board
1
1
Figure 7 - HDMI High Speed Signal Protection Application Diagram
? 2006 Semtech Corp.
7
www.semtech.com
相关PDF资料
RCLAMP0554S.TCT TVS DIODE 5V 375W SOT23-6L
RCLAMP2502L.TBT TVS ARRAY 800W 2.5V 2CH 8-SOIC
RCLAMP2504P.TCT TVS ARRAY SLP1616P6 6-PIN
RCLAMP3304N.TCT IC TVS ARRAY 4-LINE 3.3V 10-SLP
RCLAMP7002M.TBT IC TVS ARRAY ADSL 70V 10-MSOP
RF2192-000 TVS DIODE 5V 1CH UNI SMD
RF2193-000 TVS DIODE 5V 1CH BI SMD
相关代理商/技术参数
RCLAMP0544T 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:RailClamp?? Ultra Low Capacitance TVS Arrays
RCLAMP0544T.TCT 制造商:Semtech Corporation 功能描述:ESD Suppressor Diode Arrays 制造商:Semtech Corporation 功能描述:ESD Suppressor Diode Arrays ±18KV 9-Pin SMD T/R 制造商:Semtech 功能描述:ESD Suppressor Diode Arrays ±18KV 9-Pin SMD T/R 制造商:SEMTECH 功能描述:Ultra Low Cap TVS Arrays
RCLAMP0552T 制造商:Semtech Corporation 功能描述:
RCLAMP0554S 制造商:Semtech Corporation 功能描述:TVS-DIODE ARRAY, 375W, 9.8V, SOT-23; Reverse Stand-Off Voltage Vrwm:5V; Breakdown Voltage Max:6V; Clamping Voltage Vc Max:15V; Diode Case Style:SOT-23; No. of Pins:6; Power Dissipation Pd:375W; Breakdown Voltage Range:6V ;RoHS Compliant: Yes
RCLAMP0554S.TCT 功能描述:TVS DIODE 5V 375W SOT23-6L RoHS:是 类别:过电压,电流,温度装置 >> TVS - 二极管 系列:RailClamp® 标准包装:7,500 系列:TransZorb® 电压 - 反向隔离(标准值):30.8V 电压 - 击穿:34.2V 功率(瓦特):400W 电极标记:单向 安装类型:表面贴装 封装/外壳:DO-214AC,SMA 供应商设备封装:DO-214AC(SMA) 包装:带卷 (TR)
RCLAMP0554STCT 制造商:SEMTECH 功能描述:ESD/EMI protection
RCLAMP0582B 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Low Capacitance TVS for ESD and Surge Protection
RCLAMP0582B.TCT 制造商:Semtech Corporation 功能描述:ESD Suppressor TVS 30KV 3-Pin SOT-523 T/R