MICROSEMI LX7202

LX7202-xx
I N T E G R A T E D
EMI Filter & ESD Protection for Up Stream USB
Ports
P R O D U C T S
P RODUCTION D ATA S HEET
KEY FEATURES
DESCRIPTION
ƒ Bi-directional EMI/RFI low-pass
filter
ƒ Line termination with integrated
ESD protection
ƒ Low TVS operating voltage
(5.25V)
ƒ Low leakage current
ƒ Integrated single die
construction
ƒ Available with 15 or 22Ω Series
Resistance
ƒ Crosses from Semtech STF202
The 47 pF capacitor completes the
high frequency filter and controls the
edge rate of the USB signals. The
LX7202 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 LX7202 minimizes board space
and allows for ideal placement near the
connector. The LX7202 is ideal for use
in USB hubs, peripherals and portable
appliances.
APPLICATIONS
ƒ USB 1.1 and USB 2.0 Full
Speed Compliant
ƒ Peripherals
ƒ Computers and Printers
ƒ Mobile phones
ƒ Pagers and PDA’s
ƒ Digital Cameras
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
PACKAGE ORDER INFO
TJ (°C)
Plastic
6-Pin SOT23
LX7202-15ISF
LX7202-22ISF
SF
-40 to 125
-40 to 125
Package
Marking
215
222
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The LX7202 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 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 kΩ
pull-up
resistor
identifies
the
appropriate data line for full speed or
low speed operation.
Tape & Reel Quantity
(Reel Size)
BENEFITS
3K (7inches)
ƒ Filter response characterized up
to 6 GHz
ƒ <2dB insertion loss in the pass
band
ƒ >20dB attenuation in the 800900 MHz range
ƒ >12dB attenuation in the WLAN
frequencies of 2.4GHz and 5.06.0 GHz
Note: Append the letter “T” to the part number
For Tape & Reel Ordering
PRODUCT HIGHLIGHT
Rs
D in
from
connector
D out
to IC
47pF
1.5K
DIN
6
1
from
connector
47pF
D in
from
connector
Rs
D out
to IC
Circuit Diagram
Copyright © 2002
Rev. 1.0c, 2005-01-28
DIN
from
connector
1
2
RPU
6
GND
5
DOUT
4
DOUT
C
RS
LX7202-XX
VBUS
VBUS
to IC
C
3
to IC
RS
Functional Schematic with PinOut
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
LX7202-xx
I N T E G R A T E D
P R O D U C T S
EMI Filter & ESD Protection for Up Stream USB
Ports
P RODUCTION D ATA S HEET
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) ........................................ 260°C
Operating Temperature ...................................................... -40°C to +125°C
Storage Temperature Range............................................... -55°C to +150°C
VBUS
1
6
GND
DIN
2
5
DOUT
DIN
3
from
connector
from
connector
WWW . Microsemi .C OM
PACKAGE PIN OUT
to IC
4
DOUT
to IC
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.
SF PACKAGE
(Top View)
THERMAL DATA
SF
Plastic SOT-23 6-Pin
THERMAL RESISTANCE-JUNCTION TO CASE, θJC
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
62 °C/W
96 °C/W
Junction Temperature Calculation: TJ = TA + (PD x θJA).
The θJA 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
Description
Bus Voltage
DIN
Data In
GND
Ground
DOUT
Data Out
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, the following specifications apply over the operating ambient temperature -40°C ≤ TA
otherwise noted.
Symbol
Stand-Off Voltage
Breakdown Voltage
Leakage Current
Series Resistance (-15)
Series Resistance (-22)
Temperature Coefficient of RS
Pull Up Resistance
Capacitor
VRWM
VBR
IR
RS
RS
TCOEFF
RPU
C
Total Capacitance
Copyright © 2002
Rev. 1.0c, 2005-01-28
CTOT
Test Conditions
IR = 1mA
VRWM = 5.25V, T = 25°C
Each Line
Each Line
Each Line
Each Line
Each Line
Between I/O Pins and Ground, Each Device
VR = 0V, f = 1MHz
Min
+125°C except where
LX7202-xx
Typ
Max
5.25
6
13.5
19.8
1.35
54
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
15
22
200
1.5
47
60
1
16.5
24.2
1.65
66
Units
V
V
µA
Ω
Ω
ppm
KΩ
pF
pF
Page 2
ELECTRICALS
Parameter
≤
LX7202-xx
I N T E G R A T E D
EMI Filter & ESD Protection for Up Stream USB
Ports
P R O D U C T S
P RODUCTION D ATA S HEET
APPLICATION CIRCUITS
Peripheral (upstream) port
LX7201
LX7202
V BUS
RS
4
WWW . Microsemi .C OM
Host or Hub (downstream) port
GND
1
3
RPU
C
6
C
USB
Transceiver
RPD
5
RS
2
RS
2
USB
Transceiver
5
C
C
RPD
6
1
GND
V BUS
3
4
RS
Figure 1 – Typical Application
APPLICATION INFORMATION
The LX7202 meets the requirements of the USB v1.1 and
USB 2.0 Full Speed specification for device termination,
EMI filtering and ESD protection. The RS resistor provides
the proper signal termination; the 47pF 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 LX7202 can configure the
upstream port for either Full-Speed or Low-Speed
operation. The figures below show the proper connection in
accordance with the USB specification.
Host
USB
Transceiver
cable
ƒ
ƒ
ƒ
ƒ
Voltage Supply (Vbus) is connected to Pin 1
Ground is connected to Pin 6
D+ from the connector is routed to Pin 3 (1.5 kΩ pull-up
resistor) and Pin 4 to the D+ line of the USB Transceiver
D- from the connector is routed to Pin 2 and Pin 5 to the
D- line of the USB Transceiver
1
6
VBUS
GND
LX7202
2
5
DIN
GND
VBUS
DD+
Peripheral
USB
Transceiver
APPLICATIONS
GND
VBUS
DD+
FULL SPEED DEVICE
The USB 2.0 specification offers a 12 Mbps data
transfer rate known as Full-Speed which requires a 1.5 kΩ
pull-up resistor to be connected to the D+ line. Slew rate
control is accomplished with 47pF attached to the
transceiver before the RS.
DOUT
3
RPU
DIN
4
DOUT
Figure 2 – Connection for Full Speed Operation
Copyright © 2002
Rev. 1.0c, 2005-01-28
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
LX7202-xx
I N T E G R A T E D
EMI Filter & ESD Protection for Up Stream USB
Ports
P R O D U C T S
P RODUCTION D ATA S HEET
ƒ
Voltage Supply (Vbus) is connected to Pin 1
ƒ
Ground is connected to Pin 6
ƒ
D+ from the connector is routed to Pin 2 and Pin 5 to
the D+ line of the USB Transceiver
ƒ
D- from the connector is routed to Pin 3 (1.5 kΩ pullup resistor) and Pin 4 to the D- line of the USB Transceiver
LOW SPEED DEVICE
The USB v1.1 specification offers a 1.5 Mbps data
transfer rate known as Low-Speed which requires a 1.5 k Ω
pull-up resistor to be connected to the D- line. Slew rate
control is accomplished with 47pF attached to the
transceiver before the RS.
Host
USB
Transceiver
cable
GND
VBUS
DD+
1
6
VBUS
GND
LX7202
2
5
DIN
GND
VBUS
DD+
Peripheral
USB
Transceiver
DOUT
3
DIN
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APPLICATION INFORMATION (CONTINUED)
R
PU
4
DOUT
Figure 3 – Connection for Low Speed Operation
ELECTROMAGNETIC EMISSION AND SUSCEPTABILITY
Copyright © 2002
Rev. 1.0c, 2005-01-28
control cards, interface boards, external memory expansion
cards and other input/output devices that may or may not
contain digital circuitry. LX7202 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 LX7202 over the
frequency range of 30KHz to 6GHz.
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
APPLICATIONS
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 fixed
adjustable data storage devices, video monitors, keyboards,
LX7202-xx
I N T E G R A T E D
EMI Filter & ESD Protection for Up Stream USB
Ports
P R O D U C T S
P RODUCTION D ATA S HEET
WWW . Microsemi .C OM
CHARACTERISTIC CURVES
8KV Contact ESD
1
M
5.0VΩ
Ch1
40.0ns
Figure 4 – 8KV ESD input pulse as per IEC61000-4-2.
Vertical scale is equivalent to 5A/div.
CH1 S12 LOG
5dB / REF 0 dB
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.
Copyright © 2002
Rev. 1.0c, 2005-01-28
40.0ns
Figure 5 – Clamping Characteristics when device subjected
to an 8 KV ESD pulse.
CH1 S12 LOG
STOP 6 000.000 000 MHz
M
20dB / REF 0 dB
START 0.030 000 MHz
STOP 6 000.000 000 MHz
Figure 7 – Analog Crosstalk between the two datalines Dand D+
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
CHARTS
START 0.030 000 MHz
5.0V Ω
LX7202-xx
I N T E G R A T E D
EMI Filter & ESD Protection for Up Stream USB
Ports
P R O D U C T S
P RODUCTION D ATA S HEET
PACKAGE DIMENSIONS
WWW . Microsemi .C OM
SF
6 Pin Plastic SOT-23
D
Dim
A
A1
B
C
D
E
F
G
H
I
J
K
G
H
E
A1
A
C
B
F
J
K
I
MILLIMETERS
MIN
MAX
0.90
1.30
0.90
1.45
0.25
0.50
0.09
0.20
2.80
3.10
1.50
1.75
0.95 BSC
1.90 BSC
2.60
3.00
0.35
0.55
0.00
0.15
10° MAX
INCHES
MIN
MAX
0.035
0.051
0.035
0.057
0.010
0.020
0.004
0.008
0.110
0.122
0.059
0.069
0.038 BSC
0.075 BSC
0.102
0.118
0.014
0.022
0.000
0.006
10° MAX
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
Dim
C
D
E
X
Y
Y
C (ref)
MILLIMETERS
MIN
MAX
2.40
1.90
0.95
0.70
1.00
INCHES
MIN
MAX
0.094
0.074
0.037
0.028
0.039
MECHANICALS
E (ref)
D (ref)
Copyright © 2002
Rev. 1.0c, 2005-01-28
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 6
LX7202-xx
I N T E G R A T E D
P R O D U C T S
EMI Filter & ESD Protection for Up Stream USB
Ports
P RODUCTION D ATA S HEET
NOTES
WWW . Microsemi .C OM
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. 1.0c, 2005-01-28
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 7