ST USB6B1 Manual
Contents
1. USB 6 B1 RL USB Protection Breakdown voltage 6 6V min Package B1 SO 8 Packaging RL Tape amp reel Blank Tube Package information Epoxy meets UL94 VO Table 3 SO 8 dimensions Dimensions Ref Millimeters Inches Min Typ Max Min Typ Max A 1 75 0 069 Mc ems s A1 0 1 0 25 0 004 0 010 Ty A2 1 25 0 049 a ep e b 0 28 0 48 0 011 0 019 i 0 17 0 23 0 007 0 009 D 4 80 4 90 5 00 0 189 0 193 0 197 zi E 5 80 6 00 6 20 0 228 0 236 0 244 E E1 3 80 3 90 4 00 0 150 0 154 0 157 1 27 0 050 i 1 h 0 25 0 50 0 010 0 020 0 40 1 27 0 016 0 050 L1 1 04 0 041 k 0 8 0 8 ccc 0 10 0 004 7 9 Ordering information USB6B1 8 9 Figure 10 SO 8 footprint dimensions in mm i 6 8 i 1 27 In order to meet environmental requirements ST offers these devices in ECOPACK packages These packages have a lead free second level interconnect The category of second level interconnect is marked on the package and on the inner box label in compliance with JEDEC Standard JESD97 The maximum ratings related to soldering conditions are also marked on the inner box label ECOPACK is an ST trademark ECOPACK specifications are available at www st com Ordering information Ordering code Marking Package Weight Base qty Delivery mode USB6B1 USB62 100 Tu2. USB output connector The capacitance between the I O transmission wires provides no significant signal distortion at the 12 Mbit s data rate thus allowing compatibility with USB standard Available in a compact SO 8 this protective element requires minimal board space and eases the PCB layout thanks to its direct compatibility with the USB connector pin out 5 9 Telecom and datacom applications USB6B1 3 Telecom and datacom applications Figure 7 ISDN U interface protection USB6Bx 3 SMP100 O ivt E WA LT eH 8 EE EN y d WA DC Power Source Figure8 T1 E1 Line Card Protection SMP75 8 or SMP100 8 3E 3B USB6B1 RTIP I E 3 IS EM RRING TTIP Em 3 HS A TRING USB6B1 SMP75 8 or SMP100 8 Figure 9 High Speed Line Driver Receiver Protection M RN RECEIVER P di 4 5V SMeTeV8A A N 4 777 NS y amp NN A y INPUT DRIVER gt Ee ea USB6B1 7777 USB6B1 m A SM6T6V8A X S55 OUTPUT 6 9 USB6B1 Ordering information scheme 4 5 Ordering information scheme
3. Complies with the following standards MIL STD 883C Method 3015 6 C 100 pF R 1500 Q 3 positive strikes and 3 negative strikes F 1 Hz IEC 61000 4 2 level 4 15 kV air discharge class 3 8 kV contact discharge Rev 10 1 9 www st com Characteristics USB6B1 2 9 Characteristics Table 1 Absolute maximum ratings Symbol Parameter Value Unit IEC61000 4 2 contact discharge 8 Vpp Peak pulse voltage IEC61000 4 2 air discharge 15 kV MIL STD883C Method 30 15 6 4 Ppp Peak pulse power 8 20 us 500 W 8 20 us 25 lpp Peak pulse current A 2 10 us 40 Tstg Storage temperature range 55 to 150 C Top Operating temperature range 40 to 85 C TL Lead solder temperature 10 s duration 260 C Table 2 Electrical characteristics Tamp 25 C Value Symbol Parameter Unit Min Typ Max VBR Breakdown voltage between Vgus and GND IRp 1mA 6 V IRM Leakage current Vam 5 25 V 10 HA Capacitance between pins D and D Vee 15 F E Vosc 30 mV F 1 MHz Va 0 V not connected Capacitance between pins D or D and GND Vosc 30 mV F 1 MHz Vg 25V bcd 25 pF ky USB6B1 Characteristics Figure 1 Peak power dissipation versus initial junction temperature Figure 2 Relative variation of leakage current versus junction temperature typical values 1 0 0 9 0 8 0 7 0 6 0 5 0 4 0 3 0 2 0 1 0
4. SZA USB6B1 Data line protection Applications Where transient overvoltage protection in sensitive equipment is required such as Universal Serial Bus ports RS 423 interfaces RS 485 interfaces ISDN equipment T1 E1 line cards HDSL ASDL interfaces Features m Full diode bridge with integrated clamping protection m Breakdown voltage Var 6 V min m Peak pulse power dissipation Ppp 500 W 8 20 us m Very low capacitance compatible with high debit data or signal rates Description In order to prevent fast transients from leading to severe damages in a high speed data system a specific protection has been developed by STMicroelectronics The USB6B1 protects the two input lines against overvoltage Besides this device also keeps the power rails in a safe limit thanks to the integrated Transil diode Benefits m Provides protection for each line and between the supply voltage and GND 25 A 8 20 us m High ESD protection level up to level 3 per MIL STD 883C Method 3015 6 m Separated inputs and outputs so called 4 point structure to improve ESD susceptibility m Comprehensive package pin out for immediate implementation August 2006 SO 8 Order Codes Part Numbers Marking USB6B1 USB62 USB6B1RL USB62 Functional diagram Nf Vcc ki Vcc 1 01 A 1 01 1 02 1 02 A GND GND
5. The ST logo is a registered trademark of STMicroelectronics All other names are the property of their respective owners 2006 STMicroelectronics All rights reserved STMicroelectronics group of companies Australia Belgium Brazil Canada China Czech Republic Finland France Germany Hong Kong India Israel Italy Japan Malaysia Malta Morocco Singapore Spain Sweden Switzerland United Kingdom United States of America www st com 9 9
6. Vel Vf Lwat REF1 GND Vf twill POSITIVE SURGE NEGATIVE SURGE di NEGATIVE POSITIVE Lw at SURGE SURGE Vee Vf How to ensure good ESD protection While the USB6B1 provides a high immunity to ESD surge an efficient protection depends on the layout of the board In the same way with the rail to rail topology the track from the Vec pin to the power supply and from the GND pin to GND voltage must be as short as possible to avoid overvoltages due to parasitic phenomena see Figure 4 It s often harder to connect the power supply near to the USB6B1 unlike the ground thanks to the ground plane that allows a short connection To ensure the same efficiency for positive surges when the connections can t be short enough we recommend to putting a 100 nF c apacitor close to the USB6B1 between Vcc and ground to prevvent these kinds of overvoltage disturbances see Figure 5 The addition of this capacitor offers better protection by providing a constant voltage during the surge Figure 6 shows the improvement of the ESD protection according to the recommendations described above An imortant precaution to take is to put the protection device closer to the disturbance source generally the connection ky USB6B1 Technical information 2 3 2 4 Universal Serial Bus The data transmission standard Universal Serial Bus USB is being driven by market leaders in
7. the use in any manner whatsoever of such third party products or services or any intellectual property contained therein UNLESS OTHERWISE SET FORTH IN ST S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION OR INFRINGEMENT OF ANY PATENT COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE ST PRODUCTS ARE NOT RECOMMENDED AUTHORIZED OR WARRANTED FOR USE IN MILITARY AIR CRAFT SPACE LIFE SAVING OR LIFE SUSTAINING APPLICATIONS NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY DEATH OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE ST PRODUCTS WHICH ARE NOT SPECIFIED AS AUTOMOTIVE GRADE MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER S OWN RISK Resale of ST products with provisions different from the statements and or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever any liability of ST ST and the ST logo are trademarks or registered trademarks of ST in various countries Information in this document supersedes and replaces all information previously supplied
8. the world of Computer and Telecommunications including Compaq DEC IBM Intel Microsoft NEC and Nortel and has become a leading transmission protocol This standard mainly provides simplified interconnectivity Specialized ports on the back of the present PC will largely be replaced by USB ports Many peripherals such as printers key boards monitors and joysticks use USB ports The USB offers high speed communication rates up to 480 Mbit s Only two wires D D are required for data transfer Additionally limited amount of power for USB devices located on the downstream can also be transmitted on two separate conductors within the same cable Protection to support USB Designers dealing with the USB chips are concerned about electrostatic discharge sensitivity ESD of their USB controller ICs The USB controller is more than just a driver receiver it acts as a microcontroller which manages power and direct signal traffic This complexity increases its cost over conventional devices Therefore a failure of a USB port could result in costly computer failure In order to prevent these fast transients from leading to severe damages in a system a specific protection has been developed by STMicroelectronics The USB6Bx protects not only the two wires of data transmission but also keep the power rails in a safe limit Figure 6 Recommended configuration for USB port protection USB IC GND
9. 0 40 Ppp Tj initial Ppp Tj initial 25 C 1 Tj initial C IRTj IR Tj 25 C 0 Aou 120 140 Figure 3 Relative variation of breakdown voltage versus junction temperature typical values 1 05 1 00 0 95 0 90 VBRITj VBRITj225 C TiCC 40 120 140 dl 3 9 Technical information USB6B1 2 2 1 Note 2 2 Important 4 9 Technical information Surge protection The USB6B1 is optimized to perform surge protection based on the rail to rail topology The clamping voltage Vc can be estimated as follow Vort Vee Vr for positive surges Ver Vr for negative surges with Ve V rg lp Vr forward drop voltage V forward drop threshold voltage The estimations do not take into account phenomena due to parasitic inductances Figure 4 Surge behavior Figure 5 ESD behavior optimized layout and addition of a 100 nF capacitor Lw Lw Vec REF2 Vcc C 100nF Vcle Vec Vf surge gt 0 Vel Vf surge lt 0 surge lt 0 di E di 0 A Vel VccsVf Lwar Surge gt wo di a 3
10. be SO 8 0 077 g USB6B1RL USB62 2500 Tape and reel Revision history Date Revision Description of Changes Oct 2003 6A Previous issue 03 May 2005 7 Figure 1 on page 1 dots connection corrected 22 Feb 2006 8 Marking typing error corrected on page 1 and 7 Reformated to current standard ECOPACK statement 16 Aug 2006 3 added SO 8 package dimensions corrected USB6B1 Please Read Carefully Information in this document is provided solely in connection with ST products STMicroelectronics NV and its subsidiaries ST reserve the right to make changes corrections modifications or improvements to this document and the products and services described herein at any time without notice All ST products are sold pursuant to ST s terms and conditions of sale Purchasers are solely responsible for the choice selection and use of the ST products and services described herein and ST assumes no liability whatsoever relating to the choice selection or use of the ST products and services described herein No license express or implied by estoppel or otherwise to any intellectual property rights is granted under this document If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services or any intellectual property contained therein or considered as a warranty covering
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ST USB6B1 Manual