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Technical content
Features
- Lowest-Power, Smallest Programmable PLL
- Very Low Jitter and Phase Noise
- Output Frequency up to: - 110 MHz @ 1.8V Operation - 166 MHz @ 2.5V Operation - 200 MHz @ 3.3V Operation
- Input Frequency: - Fundamental Crystal: 10 MHz to 50 MHz - Reference Clock: 1 MHz to 200 MHz
- Accepts >0.1V Reference Signal Input Voltage
- One I/O Pin can be Configured as Output Enable (OE), Frequency Switching (FSEL), Power Down (PDB) Input, or CLK1 Output.
- <10 μA Current Consumption with PDB Active.
- Single 1.8V to 3.3V, ±10% Power Supply
- Operating Temperature Range from –40°C to +85°C
- Available in 6-pin DFN and SOT-23 GREEN/RoHS Compliant Packages General Description The PL611s-02 is a low-power, small form factor, high performance OTP-base programmable frequency synthesizer and a part in the PicoPLL Factory Programmable Quick Turn Clocks family. Designed to fit in a small DFN or SOT-23 package for a broad range of applications, the PL611s-02 offers the best phase noise and jitter performance, and power consumption of its rivals. In addition, one programmable I/O pin can be configured as Output Enable (OE), Frequency Switching (F SEL), Power Down (PDB) input, or CLK1 (F OUT, F REF, F REF/2) output. The power down feature of PL611s-02, when activated, allows the IC to consume less than 10 μA of power, while its programming flexibility allows generating any output, up to 200 MHz using a low-cost crystal or reference input. Package Types PL611S-02 DFN 2.0x1.3 Top View PL611S-02 SOT-23 3.0x3.0 Top View GND XIN, FIN OE, PDB, FSEL, CLK1 VDD XOUT CLK0 3 1 SOT-23-6 6 4 1 2 3 XIN, FIN OE, PDB, FSEL, CLK1 GND XOUT
5 VDD
1.8V-3.3V PicoPLL, World’s Smallest Programmable Clock
DS20005670A-page 2 2016 Microchip Technology Inc. Functional Block Diagram Phase Detector Charge Pump Loop Filter VCO XIN/FIN XOUT R-Counter (8-bit) FVCO = FREF * (2 * M/R) FOUT = FVCO / (2 * P) CLK0 FREF OE, PDB, FSEL, CLK1 XTAL OSC M-Counter (11-bit) Programmable CLoad Programmable Function P-Counter (5-bit)2 Programming Logic
2016 Microchip Technology Inc. DS20005670A-page 3 PL611S-02
1.0 ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings † † Notice: Exposure of the device under conditions beyond the limits specified by Maximum Ratings for extended periods may cause permanent damage to the device and affect product reliability. These conditions represent a stress rating only, and functional operations of the device at these or any other conditions above the operational limits noted in this specification is not implied. *Operating temperature is guaranteed by design. Parts are tested to commercial grade only.
DS20005670A-page 4 2016 Microchip Technology Inc. TABLE 1-1: DC SPECIFICATIONS Parameters Symbol Min. Typ. Max. Units Conditions Supply Current, Dynamic I DD — 6.0 — mA VDD = 3.3V, 30 MHz, Load = 15 pF — 3.9 — VDD = 2.5V, 30 MHz, Load = 15 pF — 2.1 — VDD = 1.8V, 30 MHz, load = 15 pF PLL Off: Supply Current, Dynamic IDD — 2.0 — mA VDD = 3.3V, 30 MHz, Load = 15 pF — 1.6 — VDD = 2.5V, 30 MHz, Load = 15 pF — 0.8 — VDD = 1.8V, 30 MHz, Load = 15 pF Supply Current, Disabled State IDD — — <10 μA When PDB=0 Operating Voltage V DD 1.62 — 3.63 V — Power Supply Ramp t PU 0.05 — 100 ms Time for VDD to reach 90% VDD. Power ramp must be monotonic. Output Low Voltage V OL — — 0.4 V I OL = +4 mA Standard Drive Output High Voltage V OH VDD –0.4 — — V I OH = –4 mA Standard Drive Output Current, Low Drive I OSD 4——m A V OL = 0.4V, VOH = 2.4V Output Current, Standard Drive IOSD 8——m A V OL = 0.4V, VOH = 2.4V Output Current, High Drive I OHD 16 — — mA V OL = 0.4V, VOH = 2.4V TABLE 1-2: AC SPECIFICATIONS Parameters Symbol Min. Typ. Max. Units Conditions Crystal Input Frequency (XIN) 10 — 50 MHz Fundamental Crystal Input (FIN) Frequency 1 — 200 MHz @ VDD = 3.3V 1 — 166 @ V DD = 2.5V 1— 1 1 0 @ V DD = 1.8V Input (FIN) Signal Amplitude 0.9 — V DD VPP Internally AC coupled (High Frequency) Input (FIN) Signal Amplitude 0.1 — V DD VPP Internally AC coupled (Low Frequency) 3.3V<50 MHz, 2.5V<40 MHz, 1.8V<15 MHz Output Frequency — — 200 MHz @ VDD = 3.3V — — 166 @ V DD = 2.5V ——1 1 0 @ V DD = 1.8V Settling Time — — 2 ms At power-up (after VDD increases over 1.62V)
2016 Microchip Technology Inc. DS20005670A-page 5 PL611S-02 Output Enable Time — — 10 ns OE Function; TA =25°C, 15 pF Load. Add one clock period to this measure- ment for a usable clock output. —— 2 m s PDB Function; TA =25°C, 15 pF Load VDD Sensitivity –2 — 2 ppm Frequency vs. V DD ±10% Output Rise Time — 1.2 1.7 ns 15 pF Load, 10/90% VDD, High Drive, 3.3V Output Fall Time — 1.2 1.7 ns 15 pF Load, 90/10% VDD, High Drive, 3.3V Duty Cycle 45 50 55 @2.5V and 3.3V over entire frequency range, VDD/2 45 50 55 @1.8V, ≤ 75 MHz FOUT, VDD/2 40 — 60 @1.8V, 75 MHz < FOUT ≤
110 MHz
Period Jitter, Pk-to-Pk (Note 1) (10,000 samples measured) —7 0 —p s With capacitive decoupling between VDD and GND Note 1: Jitter performance depends on the programming parameters. TABLE 1-3: CRYSTAL SPECIFICATIONS Parameters Symbol Min Typ Max Units Fundamental Crystal Resonator Frequency F XIN 10 — 50 MHz Crystal Loading Rating (The IC can be programmed for any value in this range) C L (xtal) 8 — 12 pF Maximum Sustainable Drive Level — — — 100 μW Operating Drive Level — — 30 — μW Metal Can Crystal Shunt Capacitance C0 — — 5.5 pF ESR Max ESR — — 50 Ω Small SMD Crystal Shunt Capacitance C0 — — 2.5 pF ESR Max ESR — — 80 Ω TABLE 1-2: AC SPECIFICATIONS (CONTINUED) Parameters Symbol Min. Typ. Max. Units Conditions
DS20005670A-page 6 2016 Microchip Technology Inc. TEMPERATURE SPECIFICATIONS (Note 1) Parameters Sym. Min. Typ. Max. Units Conditions Temperature Ranges Storage Temperature Range TS –65 — 150 °C — Soldering Temperature T S — — 260 °C Green Package Ambient Operating Temperature Range TA –40 — 85 °C — Note 1: Exposure of the device under conditions beyond the limits specified by Maximum Ratings for extended periods may cause permanent damage to the device and affect product reliability. These conditions repre- sent a stress rating only, and functional operations of the device at these or any other conditions above the operational limits noted in this specification is not implied. *Operating temperature is guaranteed by design. Parts are tested to commercial grade only.
2016 Microchip Technology Inc. DS20005670A-page 7 PL611S-02
2.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1. TABLE 2-1: PIN FUNCTION TABLE Name Pin Assignment Type Description SOT-23 DFN OE, PDB, FSEL, CLK1 1 2 I/O This programmable I/O pin can be configured as an Output Enable (OE) input, Power Down input (PDB), On-the-Fly Frequency Switching Selector (FSEL), or CLK1 clock output This pin has an internal 60 kΩ pull up resistor for OE, PDB, and FSEL. State OE PDB FSEL
0 Tri-State CLK Power Down
1 (default) Normal Mode Normal Mode Bank 2 GND 2 3 P GND connection XIN, FIN 3 1 I Crystal or Reference Clock input pin XOUT 4 6 O Crystal Output pin. Do Not Connect (DNC) when F IN is present. VDD 5 5 P V DD connection CLK0 6 4 O Programmable Clock Output TABLE 2-2: KEY PROGRAMMING PARAMETERS CLK[0:1] Output Frequency Output Drive Strength Programmable Input/Output FOUT = FREF × M / (R × P) Where: M = 11 bit R = 8 bit P = 5 bit CLK0 = F OUT, FREF or FREF/(2×P) CLK1 = FREF, FREF/2, CLK0 or CLK0/2 Three optional drive strengths to choose from:
- Low: 4 mA
- Std: 8 mA (default)
- High: 16 mA One output pin can be configured as:
- OE - input
- PDB - input
- FSEL - input
- CLK1 - output
DS20005670A-page 8 2016 Microchip Technology Inc.
3.0 FUNCTIONAL DESCRIPTION
PL611s-02 is a highly featured, very flexible, advanced programmable PLL design for high performance, low-power, small form-factor applications. The PL611s-02 accepts a fundamental input crystal of
10 MHz to 50 MHz or reference clock input of 1 MHz to
200 MHz and is capable of producing two outputs up to
200 MHz. This flexible design allows the PL611s-02 to deliver any PLL generated frequency, F REF (Crystal or REF_CLK) frequency or F REF/(2×P) to CLK0 and/or CLK1. The following content explains some of the design features of the PL611s-02.
3.1 PLL Programming
The PLL in the PL611s-02 is fully programmable. The PLL is equipped with an 8-bit input frequency divider (R-Counter), and an 11-bit VCO frequency feedback loop divider (M-Counter). The output of the PLL is transferred to a 5-bit post VCO divider (P-Counter). The output frequency is determined by the following formula: EQUATION 3-1:
3.2 Clock Output (CLK0)
CLK0 is the main clock output. The output of CLK0 can be configured as the PLL output (F VCO/(2×P)), F REF (Crystal or REF_CLK) output, or F REF/(2×P) output. The output drive level can be programmed to Low Drive (4 mA), Standard Drive (8 mA) or High Drive (16 mA). The maximum output frequency is determined by the Power Supply Voltage; 200 MHz at 3.3V, 166 MHz at 2.5V and 110 MHz at 1.8V.
3.3 Clock Output (CLK1)
The CLK1 feature allows the PL611s-02 to have an additional clock output programmed to one of the following: REF - Reference (Crystal or REF_CLK) Frequency
- F REF / 2
- CLK0
- CLK0 / 2
3.4 Maximum VCO Frequency
For the best performance, we recommend to use the highest VCO frequency allowed at the power supply voltage where the PL611s-02 will be used. It is actually the maximum VCO frequency that determines the maximum output frequency. When a PL611s-02 is programmed for use at a certain power supply voltage, it is safe to use that part at higher voltages also because at higher voltages the maximum VCO frequency is also higher. The other way around, using the part at a lower voltage than what it was originally configured for, is not safe.
3.5 Output Enable (OE)
The Output Enable feature allows the user to enable and disable the clock output(s) by toggling the OE pin. The OE pin incorporates a 60 kΩ pull up resistor giving a default condition of logic “1”.
3.6 Power-Down Control (PDB)
The Power Down (PDB) feature allows the user to put the PL611s-02 into “Sleep Mode”. When activated (logic ‘0’), PDB disables the PLL, the oscillator circuitry, counters, and all other active circuitry. In Power Down mode the IC consumes <10 μA of power. The PDB pin incorporates a 60 k Ω pull up resistor giving a default condition of logic “1”.
3.7 Frequency Select (FSEL)
The Frequency Select (FSEL) feature allows the PL611s-02 to switch between two pre-programmed outputs allowing the device “On the Fly” frequency switching. The FSEL pin incorporates a 60 k Ω pull up resistor giving a default condition of logic “1”. F OUT FREF M
2016 Microchip Technology Inc. DS20005670A-page 9 PL611S-02
4.0 LAYOUT RECOMMENDATIONS
The following guidelines are to assist you with a performance optimized PCB design.
4.1 Signal Integrity and Termination
- Keep traces short!
- Trace = Inductor. With a capacitive load this equals ringing
- Long trace = Transmission Line. Without proper termination this will cause reflections (looks like ringing).
- Design long traces (greater than one inch) as striplines or microstrips with defined impedance.
- Match trace at one side to avoid reflections bouncing back and forth.
4.2 Decoupling and Power Supply
- Place decoupling capacitors as close as possible to the VDD pin(s) to limit noise from the power supply
- Multiple VDD pins should be decoupled separately for best performance.
- Addition of a ferrite bead in series with VDD can help prevent noise from other board sources
- Value of decoupling capacitor is frequency dependent. Typical values to use are 0.1 μF for designs using frequencies < 50 MHz and 0.01 μF for designs using frequencies > 50 MHz. FIGURE 4-1: Typical CMOS Termination. FIGURE 4-2: Crystal Tuning Circuit. Typical CMOS Termination Place Series Resistor as close as possible to CMOS output. CMOS Output Buffer (Typical buffer impedance 20Ω) To CMOS Input Series Resistor Use value to match output buffer impedance to 50Ω trace. Typical value is 30Ω. 50Ω Line Crystal Tuning Circuit Series and parallel capacitors used to fine tune the crystal load to the circuit load. Crystal XIN XOUT CPT CPT CST CST: Series Capacitor that is used to lower circuit load to match crystal load. Raises frequency offset. This can be eliminated by using a crystal with a CLOAD of equal or greater value than the oscillator. CPT: Parallel Capacitors that are used to raise the circuit load to match the crystal load. Lowers frequency offset.
DS20005670A-page 10 2016 Microchip Technology Inc.
5.0 PACKAGING INFORMATION
5.1 Package Marking Information
Legend: XX...X Product code or customer-specific information Y Year code (last digit of calendar year) YY Year code (last 2 digits of calendar year) WW Week code (week of January 1 is week ‘01’) NNN Alphanumeric traceability code Pb-free JEDEC ® designator for Matte Tin (Sn) * This package is Pb-free. The Pb-free JEDEC designator ( ) can be found on the outer packaging for this package.
- , ▲, ▼ Pin one index is identified by a dot, delta up, or delta down (triangle mark). Note: In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information. Package may or may not include the corporate logo. Underbar (_) and/or Overbar (‾) symbol may not be to scale.
2016 Microchip Technology Inc. DS20005670A-page 11 PL611S-02 6-LEAD TDFN 2.0 MM × 1.3 MM PACKAGE OUTLINE & RECOMMENDED LAND PATTERN Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging.
DS20005670A-page 12 2016 Microchip Technology Inc. Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging.
2016 Microchip Technology Inc. DS20005670A-page 13 PL611S-02 6-LEAD SOT-23 PACKAGE OUTLINE & RECOMMENDED LAND PATTERN Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging.
DS20005670A-page 14 2016 Microchip Technology Inc.
2016 Microchip Technology Inc. DS20005670A-page 15 PL611S-02 APPENDIX A: REVISION HISTORY Revision A (November 2016)
- Converted Micrel document PL611s-02 to Micro- chip data sheet DS20005670A
- Minor grammatical and text changes throughout document.
- Remove TM trademark from “PicoPLL” in title and throughout document.
DS20005670A-page 16 2016 Microchip Technology Inc. NOTES:
2015 Microchip Technology Inc. DS20005670A-page 17 PL611S-02 PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, contact your local Microchip representative or sales office. Examples: a) PL611s-02-XXXGC-TR: 1.8V-3.3V PicoPLL™ Clock, Unique 3-digit pro- gramming code, DFN-6 Lead, Commercial Tem- perature, Tape & Reel b) PL611s-02-XXXTC-TR: 1.8V-3.3V PicoPLL™ Clock, Unique 3-digit pro- gramming code, SOT23-6 Lead, Commercial Tem- perature, Tape and Reel c) PL611s-02-XXXGI: 1.8V-3.3V PicoPLL™ Clock, Unique 3-digit program- ming code, DFN-6 Lead, Industrial Temperature, Tube d) PL611s-02-XXXGI-TR: 1.8V-3.3V PicoPLL™ Clock, Unique 3-digit pro- gramming code, DFN-6 Lead, Industrial Tempera- ture, Tape & Reel PART NO. X XX MediaTemperatureDevice Device: PL611s-02: 1.8V-3.3V PicoPLL, World’s Smallest Programmable Clock ID Code XXX = Unique 3-digit code assigned at programming time Package Type: G = DFN-6 Lead T = SOT23-6 Lead Temperature: C = Commercial (0°C to +70°C) I = Industrial (–40°C to +85°C) Media Type: Blank = Tube TR = Tape & Reel XXX ID Code Note 1: Tape and Reel identifier only appears in the catalog part number description. This identifier is used for ordering purposes and is not printed on the device package. Check with your Microchip Sales Office for package availability with the Tape and Reel option. X Package Type Type
DS20005670A-page 18 2015 Microchip Technology Inc. NOTES:
2016 Microchip Technology Inc. DS20005670A-page 19 Information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE . Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer’s risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights unless otherwise stated. Trademarks The Microchip name and logo, the Microchip logo, AnyRate, dsPIC, FlashFlex, flexPWR, Heldo, JukeBlox, KeeLoq, KeeLoq logo, Kleer, LANCheck, LINK MD, MediaLB, MOST, MOST logo, MPLAB, OptoLyzer, PIC, PICSTART, PIC32 logo, RightTouch, SpyNIC, SST, SST Logo, SuperFlash and UNI/O are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. ClockWorks, The Embedded Control Solutions Company, ETHERSYNCH, Hyper Speed Control, HyperLight Load, IntelliMOS, mTouch, Precision Edge, and QUIET-WIRE are registered trademarks of Microchip Technology Incorporated in the U.S.A. Analog-for-the-Digital Age, Any Capacitor, AnyIn, AnyOut, BodyCom, chipKIT, chipKIT logo, CodeGuard, dsPICDEM, dsPICDEM.net, Dynamic Average Matching, DAM, ECAN, EtherGREEN, In-Circuit Serial Programming, ICSP, Inter-Chip Connectivity, JitterBlocker, KleerNet, KleerNet logo, MiWi, motorBench, MPASM, MPF, MPLAB Certified logo, MPLIB, MPLINK, MultiTRAK, NetDetach, Omniscient Code Generation, PICDEM, PICDEM.net, PICkit, PICtail, PureSilicon, RightTouch logo, REAL ICE, Ripple Blocker, Serial Quad I/O, SQI, SuperSwitcher, SuperSwitcher II, Total Endurance, TSHARC, USBCheck, VariSense, ViewSpan, WiperLock, Wireless DNA, and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. Silicon Storage Technology is a registered trademark of Microchip Technology Inc. in other countries. GestIC is a registered trademarks of Microchip Technology Germany II GmbH & Co. KG, a subsidiary of Microchip Technology Inc., in other countries. All other trademarks mentioned herein are property of their respective companies. © 2016, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. ISBN: 978-1-5224-1079-9 Note the following details of the code protection feature on Microchip devices:
- Microchip products meet the specification contained in their particular Microchip Data Sheet.
- Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used i n the intended manner and under normal conditions.
- There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
- Microchip is willing to work with the customer who is concerned about the integrity of their code.
- Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable.” Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act. Microchip received ISO/TS-16949:2009 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company’s quality system processes and procedures are for its PIC ® MCUs and dsPIC® DSCs, KEELOQ® code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001:2000 certified.
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