![](http://datasheet.mmic.net.cn/330000/LX7203_datasheet_16431096/LX7203_1.png)
LX7203-xx
P
RODUCTION
D
ATA
S
HEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
W
M
.
C
EMI Filter & ESD Protection for Up Stream USB
Ports
Copyright
2002
Rev. 1.0a, 2002-10-22
I N T E G R A T E D P R O D U C T S
D E S C R I P T I O N
The LX7203 is an integrated
Universal Serial Bus (USB) line
termination device with an EMI filter
and ESD protection diodes. This
device offers a cost effective and
compact solution for one USB
upstream port. The USB v1.1
specification requires line termination
resistors on both the D+ and D- lines.
These resistors ensure signal integrity
by matching the cable impedance to
that of the differential driver. The 1.5
k
pull-up resistor identifies the
appropriate data line for full speed or
low speed operation.
The 47 pF capacitor completes the
high frequency filter and controls the
edge rate of the USB signals The
LX7203 protects both D+ and D- data
lines and the voltage bus from ESD.
The TVS protection diodes exceed the
requirements of IEC61000-4-2, level 4,
15kV (air discharge) and 8kV (contact
discharge).The integrated configuration
of the LX7203 minimizes board space
and allows for ideal placement near the
connector. The LX7203 is ideal for use
in USB hubs, peripherals and portable
appliances
IMPORTANT:
For the most current data, consult
MICROSEMI
’s website:
http://www.microsemi.com
P A C K A G E O R D E R I N F O
Plastic
6-Pin SC70
LX7203-15ISM
LX7203-22ISM
T
J
(
°
C)
SM
Package
Marking
315
322
Tape & Reel Quantity
(Reel Size)
-40 to 125
-40 to 125
3K (7inches)
Note: Append the letter “T” to the part number
For Tape & Reel Ordering
K E Y F E A T U R E S
Small SC70-6L Package
Bi-directional EMI/RFI low-pass
filter
Line termination with integrated
ESD protection
Low TVS operating voltage
(5.25V)
Low leakage current
Integrated single die construction
Crosses From Semtech STF203
A P P L I C A T I O N S
USB Ports
Peripherals
Computers and Printers
Mobile phones
Pagers and PDA’s
Digital Cameras
B E N E F I T S
Filter response characterized up
to 6 GHz
<2dB insertion loss in the pass
band
>20dB attenuation in the 800-
900 MHz range
>12dB attenuation in the WLAN
frequencies of 2.4GHz and 5.0-
6.0 GHz
P R O D U C T H I G H L I G H T
Rs
Rs
D out
to IC
V
BUS
C
EDGE
1.5K
D in
from
connector
2
5
D in
from
connector
D out
to IC
C
EDGE
Circuit Diagram
1
6
5
4
3
2
V
BUS
D
IN
from
connector
D
to IC
GND
D
IN
from
connector
D
to IC
R
S
C
R
S
C
R
PU
Functional Schematic with PinOut
L
X
7
2
0
3