lx7201-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 www. microsemi . com emi filter & esd protection for down stream usb ports copyright ? 2002 rev. 1.0b, 2002-10-14 integrated products description the lx7201 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 downstream 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 15k ? pull-down resistors identify the line as a downstream connection. the 47 pf capacitor completes the high frequency filter and controls the edge rate of the usb signals. the lx7201 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 lx7201 minimizes board space and allows for ideal placement near the connector. the lx7201 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 package order info t j ( c) sf plastic 6-pin sot23 package marking tape & reel quantity (reel size) -40 to 125 LX7201-15ISF 115 -40 to 125 lx7201-22isf 122 3k (7inches) note: append the letter ?t? to the part number for tape & reel ordering key features 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 available with 15 or 22 ? series resistance crosses from semtech stf201 applications usb ports peripherals printers monitors servers, desktops and notebook computers digital cameras benefits 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 product highlight circuit diagram functional schema tic with pin out l l x x 7 7 2 2 0 0 1 1 - - x x x x
lx7201-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 2 www. microsemi . com emi filter & esd protection for down stream usb ports copyright ? 2002 rev. 1.0b, 2002-10-14 integrated products 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 temperatur e (10 sec onds) .......................................... 260c operating temperatur e .........................................................-40c to +125c storage temperature ra nge ..................................................-55c to +150c note: exceeding these ratings could cause dama ge to the device. all voltages are with respect to ground. currents are positive into, negative out of specified terminal . thermal data sf plastic sot23 6-pin thermal resistance - junction to c ase , jc 62 c/w thermal resistance - junction to a mbient , ja 96 c/w junction temperature calculation: t j = t a + (p d x ja ). the ja numbers are guidelines for the thermal perfor mance of the device/pc-board system. all of the above assume no ambient airflow. package pin out v bus d in d in d out d out gnd 1 2 3 4 5 6 sf p ackage (top view) functional pin description name description vbus 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 t a +125 c except where otherwise noted. lx7201-xx parameter symbol test conditions min typ max units stand-off voltage vr wm 5.25 v breakdown voltage v br ir = 1ma 6 v leakage current i r vrwm = 5.25v, t = 25c 1 a series resistance (-15) r s each line 13.5 15 16.5 ? ? pull down resistance r pd each line 13.5 15 16.5 k ? capacitor c each line 47 pf total capacitance c tot between i/o pins and ground, each device vr = 0v, f = 1mhz 54 60 66 pf e e l l e e c c t t r r i i c c a a l l s s
lx7201-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 3 www. microsemi . com emi filter & esd protection for down stream usb ports copyright ? 2002 rev. 1.0b, 2002-10-14 integrated products application circuits usb transceiver host or hub (downstream) port peripheral (upstream) port usb transceiver lx7201 lx7202 v bus gnd 16 5 4 3 2 r pu r s c r s c 1 6 5 4 3 2 v bus gnd c r s r pd r pd r s c figure 1 ? typical application application information the lx7201 meets the requir ements of the usb v1.1 specification for device termination, emi filtering and esd protection. the r s 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. device connection: voltage supply (v bus ) is connected to pin 1 ground is connected to pin 6 d+ from the connector is routed to pin 2 and out of pin 5. d- from the connector is routed to pin 3 and out of pin 4. 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, interf ace boards, external memory expansion cards and other input/output devices that may or may not contain digital circuitry. lx7201 is optimized to minimize the radiated emi whic h is the primary concern in devices using usb. refer to the typical filter response curve for the attenuation characteristics of lx7201 over the frequency range of 30khz to 6ghz. a a p p p p l l i i c c a a t t i i o o n n s s
lx7201-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 4 www. microsemi . com emi filter & esd protection for down stream usb ports copyright ? 2002 rev. 1.0b, 2002-10-14 integrated products characteristic curves 8kv contact esd 50v ? 40.0ns m figure 2 ? 8kv esd input pulse as per iec61000-4-2. vertical scale is equivalent to 5a/div. 5.0v ? 40.0ns m ch1 1 figure 3 ? clamping characteristics when device subjected to an 8 kv esd pulse. figure 4 ? 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 5 ? analog crosstalk between the two datalines d- and d+ c c h h a a r r t t s s
lx7201-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 5 www. microsemi . com emi filter & esd protection for down stream usb ports copyright ? 2002 rev. 1.0b, 2002-10-14 integrated products package dimensions sf 6-pin sot-23 package h g f e a1 j i c k a b d m illimeters i nches dim min max min max a 0.90 1.30 0.035 0.051 a1 0.90 1.45 0.035 0.057 b 0.25 0.50 0.010 0.020 c 0.09 0.20 0.004 0.008 d 2.80 3.10 0.110 0.122 e 1.50 1.75 0.059 0.069 f 0.95 bsc 0.038 bsc g 1.90 bsc 0.075 bsc h 2.60 3.00 0.102 0.118 i 0.35 0.55 0.014 0.022 j 0.00 0.15 0.000 0.006 k 10 max 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 c (ref) x y e (ref) d (ref) m illimeters i nches dim min max min max c - 2.40 - 0.094 d - 1.90 - 0.074 e - 0.95 - 0.037 x - 0.70 - 0.028 y - 1.00 - 0.039 m m e e c c h h a a n n i i c c a a l l s s
lx7201-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 6 www. microsemi . com emi filter & esd protection for down stream usb ports copyright ? 2002 rev. 1.0b, 2002-10-14 integrated products 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. n n o o t t e e s s
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