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LX7203-xx
INTEGRATED PRODUCTS
EMI Filter & ESD Protection for Up Stream USB Ports
PRODUCTION DATA SHEET
KEY FEATURES 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
APPLICATIONS
DESCRIPTION
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
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IMPORTANT: For the most current data, consult MICROSEMI's website: http://www.microsemi.com
USB Ports Peripherals Computers and Printers Mobile phones Pagers and PDA's Digital Cameras BENEFITS Filter response characterized up to 6 GHz <2dB insertion loss in the pass band >20dB attenuation in the 800900 MHz range >12dB attenuation in the WLAN frequencies of 2.4GHz and 5.06.0 GHz
PACKAGE ORDER INFO
TJ (C) -40 to 125 -40 to 125
Plastic SM 6-Pin SC70 LX7203-15ISM LX7203-22ISM
Package Marking 315 322
Tape & Reel Quantity (Reel Size) 3K (7inches)
Note: Append the letter "T" to the part number For Tape & Reel Ordering
PRODUCT HIGHLIGHT
from connector 1.5K
D in
Rs CEDGE
D out
to IC
DIN 1 from connector 2 GND DIN 3 from connector
?
RS C
6
DOUT to IC
VBUS
5
CEDGE
2
RPU
5 VBUS
LX7203 LX7203
C RS
4
from connector
D in
D out
Rs to IC
DOUT to IC
Functional Schematic with PinOut
Circuit Diagram
Copyright 2002 Rev. 1.0a, 2002-10-22
Microsemi
Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
LX7203-xx
INTEGRATED PRODUCTS
EMI Filter & ESD Protection for Up Stream USB Ports
PRODUCTION DATA SHEET
PACKAGE PIN OUT
ABSOLUTE MAXIMUM RATINGS
Steady State Power ................................................................100mW ESD Air Discharge per IEC61000-4-2.......................................16kV ESD Contact Discharge per IEC61000-4-2................................10kV Lead Soldering Temperature (10 Seconds) ............................. 260C Operating Temperature ........................................... -40C to +125C Storage Temperature Range .................................... -55C to +150C
Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of specified terminal.
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DIN
from connector
1 2 3
6 DOUT
to IC
GND DIN
5 4
VBUS DOUT
to IC
from connector
SM PACKAGE
(Top View)
THERMAL DATA
SM
Plastic 6-Pin SC70 JC JA 119 C/W 122 C/W
THERMAL RESISTANCE-JUNCTION TO CASE,
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
Junction Temperature Calculation: TJ = TA + (PD x JA). The JA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow.
FUNCTIONAL PIN DESCRIPTION Name VBUS DIN GND DOUT Bus Voltage Data In Ground Data Out ELECTRICAL CHARACTERISTICS Description
Unless otherwise specified, the following specifications apply over the operating ambient temperature -40C TA otherwise noted. Parameter Stand-Off Voltage Breakdown Voltage Leakage Current Series Resistance (-15) Series Resistance (-22) Temperature Coefficient of RS Pull Up Resistance Capacitor Total Capacitance Symbol VRWM VBR IR RS RS TCOEFF RPU CEDGE CTOT Test Conditions IR = 1mA VRWM = 5.25V, T = 25C Each Line Each Line Each Line Each Line Each Line Between I/O Pins and Ground, Each Device VR = 0V, f = 1MHz
+125C except where
Min 6 13.5 19.8 1.35 54
LX7203 Typ
Max 5.25 1 16.5 24.2 1.65 66
Units V V A ppm K pF pF
ELECTRICALS ELECTRICALS
15 22 200 1.5 47 60
Copyright 2002 Rev. 1.0a, 2002-10-22
Microsemi
Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
LX7203-xx
INTEGRATED PRODUCTS
EMI Filter & ESD Protection for Up Stream USB Ports
PRODUCTION DATA SHEET
APPLICATION CIRCUITS
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Host or Hub (downstream port)
Peripheral (upstream port)
LX7201
RS
LX7203
1
4
C
3
R PD
RS C
6
USB Transceiver
5
RS C R PD
2 1
V BUS
2 GND 3
R PU
5 V BUS
C
USB Transceiver
4
6
GND
RS
Figure 1 - Typical Application
APPLICATION INFORMATION
The LX7203 meets the requirements of the USB v1.1 specification for device termination, EMI filtering and ESD protection. The RS resistor provides the proper signal termination; the CEDGE capacitor controls the signal rise and fall slew; the TVS diodes protect the IC from ESD damage; and the total capacitance and resistance creates a low pass filter eliminating the high frequency energy from the circuit. The LX7203 can configure the upstream port for either FullSpeed or Low-Speed operation. The figures below show the proper connection in accordance with the USB v1.1 specification.
FULL SPEED DEVICE (FIGURE 2) The USB specification offers a 12 Mbps data transfer rate known as Full-Speed which requires a 1.5 k pull-up resistor to be connected to the D+ line. Slew rate control is accomplished with CEDGE attached to the transceiver before the RS.
Voltage Supply (Vbus) is connected to Pin 5 Ground is connected to Pin 2 D+ from the connector is routed to Pin 1 (1.5 k pull-up resistor) and Pin 6 to the D+ line of the USB Transceiver D- from the connector is routed to Pin 3 and Pin 4 to the D- line of the USB Transceiver
V BUS GND D+
V BUS Host USB Transceiver
cable
GND D+ DD IN from connector 1
R PU
6 D OUT to IC
DPeripheral USB Transceiver
A APPLICATIONS
GND
2
LX7203
5 V BUS
3 D IN from connector
4 D OUT to IC
Figure 2 - Connection for Full Speed Operation
Copyright 2002 Rev. 1.0a, 2002-10-22
Microsemi
Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
LX7203-xx
INTEGRATED PRODUCTS
EMI Filter & ESD Protection for Up Stream USB Ports
PRODUCTION DATA SHEET
APPLICATION INFORMATION (CONTINUED)
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LOW SPEED DEVICE (FIGURE 3) The USB specification offers a 1.5 Mbps data transfer rate known as Low-Speed which requires a 1.5 k pull-up resistor to be connected to the D- line. Slew rate control is accomplished with CEDGE attached to the transceiver before the RS.
Voltage Supply (Vbus) is connected to Pin 5 Ground is connected to Pin 2 D+ from the connector is routed to Pin 3 and Pin 4 to the D+ line of the USB Transceiver D- from the connector is routed to Pin 1 (1.5 k pull-up resistor) and Pin 6 to the D- line of the USB Transceiver
VBUS Host USB Transceiver
cable
GND D+ DDIN from connector
VBUS GND D+
1
RPU
6 DOUT to IC 5 VBUS
LX7203
GND 2
DPeripheral USB Transceiver
3 DIN from connector
4 DOUT to IC
Figure 3 - Connection for Low Speed Operation
ELECTROMAGNETIC EMISSION AND SUSCEPTABILITY
FCC Part 15 sets limits for maximum allowable EM emission and susceptibility. There are two types of emissions. Conducted emissions with frequency of emission of 0.45 to 30 MHz and radiated emissions with frequency of emission of 30 MHz to 40 GHz. All digital computing devices including the peripheral devices must comply. Examples of peripheral devices include terminals, printers, external floppy disk drives and other data storage
devices, video monitors, keyboards, control cards, interface boards, external memory expansion cards and other input/output devices that may or may not contain digital circuitry. LX7203 is optimized to minimize the radiated EMI which is the primary concern in devices using USB. Refer to the typical filter response curve for the attenuation characteristics of LX7203 over the frequency range of 30kHz to 6GHz.
APPLICATIONS APPLICATIONS
Copyright 2002 Rev. 1.0a, 2002-10-22
Microsemi
Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
LX7203-xx
INTEGRATED PRODUCTS
EMI Filter & ESD Protection for Up Stream USB Ports
PRODUCTION DATA SHEET
CHARACTERISTIC CURVES
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8KV Contact ESD
1
Ch1
5.0V
M
40.0ns
5.0V
M
40.0ns
Figure 4 - 8KV ESD input pulse as per IEC61000-4-2. Vertical scale is equivalent to 5A/div.
Figure 5 - Clamping Characteristics when device subjected to an 8 KV ESD pulse.
GRAPHS GRAPHS
Figure 6 - Frequency response curve. Low insertion loss in the pass band and -20dB attenuation at 800-900 MHz. Better than -10dB attenuation at the WLAN frequencies of 2.4 and 5.0-6.0 GHz.
Figure 7 - Analog Crosstalk between the two datalines Dand D+
Copyright 2002 Rev. 1.0a, 2002-10-22
Microsemi
Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
LX7203-xx
INTEGRATED PRODUCTS
EMI Filter & ESD Protection for Up Stream USB Ports
PRODUCTION DATA SHEET
PACKAGE DIMENSIONS
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SM
6 Pin Plastic SC70
Dim A B C D E F G H I J K MILLIMETERS MIN MAX 1.15 1.35 1.80 2.20 1.80 2.40 0.15 0.30 0.65 BSC 0.10 0.40 0 0.10 0.80 1.00 0.80 1.10 0.10 0.18 0.10 0.30 INCHES MIN MAX 0.045 0.053 0.071 0.086 0.071 0.094 0.006 0.012 0.026 BSC 0.004 0.016 0 0.004 0.032 0.039 0.032 0.043 0.004 0.007 0.004 0.012
B F
K
CA G D E J
I
H
Note:
1. Dimensions do not include mold flash or protrusions; these shall not exceed 0.155mm(.006") on any side. Lead dimension shall not include solder coverage.
Recommended Footprint
X Y
C (ref)
Dim C D E X Y
MILLIMETERS MIN MAX 1.60 1.30 0.65 0.35 0.90
INCHES MIN MAX 0.063 0.052 0.026 0.014 0.035
M MECHANICALS
E (ref) D (ref)
Copyright 2002 Rev. 1.0a, 2002-10-22
Microsemi
Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 6
LX7203-xx
INTEGRATED PRODUCTS
EMI Filter & ESD Protection for Up Stream USB Ports
PRODUCTION DATA SHEET
NOTES
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NOTES NOTES
PRODUCTION DATA - Information contained in this document is proprietary to Microsemi and is current as of publication date. This document may not be modified in any way without the express written consent of Microsemi. Product processing does not necessarily include testing of all parameters. Microsemi reserves the right to change the configuration and performance of the product and to discontinue product at any time.
Copyright 2002 Rev. 1.0a, 2002-10-22
Microsemi
Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 7
KD
Signat ure invalid
Digitally signed by KD DN: cn=KD, o=Micros emi, c=US Date: 2002.10.2 2 13:20:51 -07'00'

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