NXP Semiconductors
PESDxU1UT series
Ultra low capacitance ESD protection diode in SOT23 package
7. Application information
The PESDxU1UT series is designed for protection of high-speed datalines from damage
caused by ESD and surge pulses. PESDxU1UT devices combine an ESD protection
diode and an ultra low capacitance compensation diode to ensure an effective device
capacitance as low as 0.6 pF. The PESDxU1UT series provides a surge capability of up to
200 W per line for an 8/20 μ s waveform.
protected data line
2
1
n.c.
3
1
2
3
n.c.
ground
PESDxU1UT
PESDxU1UT
006aaa443
Two PESDxU1UT devices in anti-parallel con?guration provide ESD protection in a common-mode
application.
The two PESDxU1UT devices should be connected as follows:
protected data line is connected to
device 1 / pin 2
device 2 / pin 1
Ground is connected to
device 1 / pin 1
device 2 / pin 2
pin 3 is not connected for both devices
Fig 5.
Bidirectional ESD protection of one line, common mode
I/O 1
2
1
ETHERNET
TRANSCEIVER
n.c.
3
1
2
3
n.c.
I/O 2
PESDxU1UT
PESDxU1UT
006aaa444
Two PESDxU1UT devices in anti-parallel con?guration provide ESD protection in a
differential-mode con?guration as e.g. for Ethernet applications.
The two PESDxU1UT should be connected as follows:
I/O line 1 is connected to
device 1 / pin 2
device 2 / pin 1
I/O line 2 is connected to
device 1 / pin 1
device 2 / pin 2
pin 3 is not connected for both devices
PESDXU1UT_SER_2
Fig 6.
Differential mode Ethernet protection
? NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 20 August 2009
7 of 13
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