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RCLAMP0502B.TCT

P1-P3P4-P6P7-P9
42007 Semtech Corp.
www.semtech.com
PROTECTION PRODUCTS
RClamp0502B
Insertion Loss S21 (Pin 1 to Pin 2)
Typical Characteristics
1
2
3
START
.
030 MHz
3
STOP 000
.
000 000 MHz
CH1 S21 LOG 6 dB / REF 0 dB
1: .00460 dB
900 MHz
2: .02010 dB
1.8 GHz
3: -.08180 dB
2.5 GHz
0 dB
-6 dB
-12 dB
-18 dB
-24 dB
-30 dB
-36 dB
1
GHz
100
MHz
3
GHz
10
MHz
1
MHz
Insertion Loss S21 (Pin 1 or Pin 2 to Pin 3)
1 2
3
START
.
030 MHz
3
STOP 000
.
000 000 MHz
CH1 S21 LOG 6 dB / REF 0 dB
1: .03430 dB
900 MHz
2: .07870 dB
1.8 GHz
3: .28040 dB
2.5 GHz
0 dB
-6 dB
-12 dB
-18 dB
-24 dB
-30 dB
-36 dB
1
GHz
100
MHz
3
GHz
10
MHz
1
MHz
Analog Crosstalk
START
.
030 MHz
3
STOP 000
.
000 000 MHz
CH1 S21 LOG 20 dB / REF 0 dB
ESD Clamping
(4kV Contact per IEC 61000-4-2)
Note: Data is taken with a 10x attenuator
ESD Clamping
(8kV Contact per IEC 61000-4-2)
Note: Data is taken with a 10x attenuator
5
2007 Semtech Corp.
www.semtech.com
PROTECTION PRODUCTS
RClamp0502B
Device Connection Options
This device is optimized for protection of 1 line
operating in excess of 3GHz. It may also be used to
protect two lines operating in excess of 2.0GHz. The
device is connected as follows:
Protection for one line with <1pF capacitance can be
achieved by connecting one data line to either pin 1 or
pin 2 with the other pin connected to ground. Pin 3 is
not connected. The connection to ground should be
made directly to a ground plane. The path length
should also be kept as short as possible to minimize
parasitic inductance.
Protection of two lines is achieved by connecting data
lines at pins 1 & 2. Pin 3 is connected to ground. The
connection to ground should be made directly to a
ground plane. The path length should also be kept as
short as possible to minimize parasitic inductance.
Matte Tin Lead Finish
Matte tin has become the industry standard lead-free
replacement for SnPb lead finishes. A matte tin finish
is composed of 100% tin solder with large grains.
Since the solder volume on the leads is small com-
pared to the solder paste volume that is placed on the
land pattern of the PCB, the reflow profile will be
determined by the requirements of the solder paste.
Therefore, these devices are compatible with both
lead-free and SnPb assembly techniques. In addition,
unlike other lead-free compositions, matte tin does not
have any added alloys that can cause degradation of
the solder joint.
Figure 1. Pin Configuration
Applications Information
62007 Semtech Corp.
www.semtech.com
PROTECTION PRODUCTS
RClamp0502B
Applications Information
HDMI DisplayHDMI Transmitter HDMI DisplayHDMI Transmitter
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
capacitance on an HDMI port will cause the
impedance of 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 capacitance, the more extreme the
modifications will need to be. If the added
capacitance is too high, compensation may not even
be possible. The RClamp0502B presents <1pF
capacitance between the pairs while 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 added
capacitance of the RClamp0502B. Figure 2 shows
how to implement the RClamp0502B in an HDMI
application (transmitter and receiver). Figure 3 shows
impedance test results using a Semtech evaluation
board with layout compensation. As shown, the device
meets the HDMI CTS impedance requirements.
Figure 2 - HDMI Schematic
Figure 3 - TDR Measurement using Semtech
Evaluation Board
A B
X-axis
1.640 1.855
(nsec)
Y-axis
99.2 104.6
(Ohm)
A
B
A
B
P1-P3P4-P6P7-P9

RCLAMP0502B.TCT

Mfr. #:
Buy RCLAMP0502B.TCT
Manufacturer:
Semtech
Description:
TVS Diodes / ESD Suppressors RAILCLAMP 2-LINE 5V SC75
Lifecycle:
New from this manufacturer.
Delivery:
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