参数资料
型号: RCLAMP0524P.TCT
厂商: Semtech
文件页数: 6/13页
文件大小: 0K
描述: TVS ARRAY SLP2510P8 10-PIN
标准包装: 1
系列: RailClamp®
电压 - 反向隔离(标准值): 5V
电压 - 击穿: 6V
电极标记: 4 通道阵列 - 单向
安装类型: 表面贴装
封装/外壳: 10-SMD,无引线
供应商设备封装: SLP2510P8
包装: 标准包装
产品目录页面: 1356 (CN2011-ZH PDF)
RClamp0522P
RClamp0524P
PROTECTION PRODUCTS
Applications Information
Design Recommendations for HDMI Protection
Adding external ESD protection to HDMI ports can be
challenging. First, ESD protection devices have an
inherent junction capacitance. Furthermore, adding
PRELIMINARY
even a small amount of capacitance will cause the
impedance of the differential pair to drop. Second,
large packages and land pattern requirements cause
12
11
10
1
discontinuities that adversely affect signal integrity.
The RClamp0524P and RClamp0522P are specifically
designed for protection of high-speed interfaces such
as HDMI. They present <0.4pF capacitance between
the pairs while being rated to handle >±8kV ESD
contact discharges (>±15kV air discharge) as outlined
in IEC 61000-4-2. Each device is in a leadless SLP
package that is less than 1.1mm wide. They are
designed such that the traces flow straight through the
device. The narrow package and flow-through design
reduces discontinuities and minimizes impact on signal
9
8
7
6
5
4
3
2
1
GND
1
GND
GND
GND
integrity. This becomes even more critical as signal
speeds increase.
Pin Configuration
Figure 1 is an example of how to route the high speed
differential traces through the RClamp0524P. The
solid line represents the PCB trace. The PCB traces
are used to connect the pin pairs for each line (pin 1 to
pin 10, pin 2 to pin 9, pin 4 to pin 7, pin 5 to pin 6).
For example, line 1 enters at pin 1 and exits at Pin 10
and the PCB trace connects pin 1 and 10 together.
This is true for lines connected at pins 2, 4, and 5 also.
Ground is connected at pins 3 and 8. One large
ground pad should be used in lieu of two separate
pads. The same layout rules apply for the
RClamp0522P.
TDR Measurements for HDMI
The combination of low capacitance, small package, and
flow-through design means it is possible to use these
devices to meet the HDMI impedance requirements of
100Ohm ±15% without any PCB board modification.
Figures 3 and 4 show impedance test results for a TDR
risetime of 200ps and 100ps respectively, using a
Semtech evaluation board with 100 Ohm traces
throughout. Measurements were taken using a TDR
method as outlined in the HDMI Compliance Test
Figure 1. Flow through Layout Using
p0524P
R Clamp052 4P
? 2008 Semtech Corp.
6
www.semtech.com
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