Microcosm MC2062 3.3 to 5V Laser/VCSEL Driver IC for Applications from 100Mbps to 1.25Gbps FEATURES G Low-cost IC, fabricated in advanced submicron BiCMOS process G Designed for driving VCSELs and low current Fabry Perot lasers G Very wide range of operation; suitable for <100Mbps to 1.25Gbps applications G G Rise/fall times <250ps G Bias current up to 20mA and modulation current up to 40mA at VCC=3.3V G G Open and closed loop configuration G The MC2062 is available in TSSOP24 and QSOP16 packages, or in die form Independently programmable VCSEL bias and modulation currents Operates with standard 5V or 3.3 V supply (10%) DESCRIPTION The MC2062 is a highly integrated, programmable laser driver for fiber optic communications systems operating at up to 1.25Gbps. Both 3.3V and 5V operation are supported. The MC2062 has differential PECL data inputs and CMOS control inputs. The modulation current and temperature coefficient are programmed by the selection of resistor values. The bias current may be controlled in a servo loop, using a feedback photodetector. Alternatively, the bias current and temperature coefficient may be programmed using external resistors. The MC2062 includes circuits to monitor the operation of the bias current control loop and to monitor the power supply level. These are used to control a safety logic function. The safety logic output on the FAILOUT pin indicates when failure of the bias control loop is detected. On the QSOP16 package, the FAILOUT pin is internally bonded to the DISABLE pad on the die. The output is always disabled when the control loop fails. ORDERING INFORMATION APPLICATIONS G G G Gigabit Ethernet Part Pin-Package Fiber Channel 100 MC2062DIE Waffle pack MC2062DIEW Expanded Whole Wafer on a Ring MC2062T24 TSSOP24 MC2062T24TR TSSOP24 Tape and Reel MC2062Q16 QSOP16 MC2062Q16TR QSOP16 Tape and Reel Fast Ethernet CONNECTIONS TOP LEVEL DIAGRAM GND 3 TSSOP24 B2 C2 IM O D S E T V CCA V CCA QSOP16 C2 1 24 B2 2 23 RESET 3 22 GND 4 21 VCCO GND 5 20 OUT2P DIN 6 19 DIN 7 18 ENABLE 8 17 OUTN DISABLE 9 FAILOUT 10 16 GND 15 B1 11 14 IPIN IBIASSET E1 12 13 Microcosm MC2062 Datecode RESET IMODSET C2 1 16 IMODSET VCCA B2 2 15 VCCA VCCA RESET 3 14 VCCO GND 4 13 OUTP OUTP DIN 5 12 OUTN OUT2N DIN 6 11 GND ENABLE 7 10 IPIN FAILOUT 8 9 IBIASOUT Microcosm MC2062 Datecode GND 2 MODULATOR OUT P D IN ENABLE OUT 2N SAFETY LOGIC BIAS DISABLE 4.3x3.9mm FAIL OUT PRELIMINARY INFORMATION OUT 2P D IN IBIASOUT 6.5x4.4mm V CCO PAGE -1- OUT N B1 E1 IB I A S O U T IBIASSET IP I N GND 0 MC2062_F MC2062 3.3 to 5V Laser/VCSEL Driver IC for Applications from 100Mbps to 1.25Gbps PIN DESCRIPTION Pin Name 16 QSOP Pin No. 20 TSSOP Pin No. C2 1 1 NPN collector. Used in conjunction with B2 for temperature compensation of modulation current. B2 2 2 NPN base. Used in conjunction with C2 for temperature compensation of modulation current. RESET 3 3 Value of capacitor connected to this internal resistor determines length of reset pulse to latch. GND - 4 Ground pin. GND 4 5 Ground pin DIN 5 6 Non-inver ted data input. May be AC-coupled or directly coupled to differential PECL source. DIN 6 7 Inver ted data input. May be AC-coupled or directly coupled to differential PECL source. ENABLE 7 8 CMOS logic input. On-chip pull-up. DISABLE - 9 CMOS logic input. On-chip pull-down. FAILOUT 8(1) 10 Latched safety logic output. B1 - 11 NPN base. Used in conjunction with E1 for temperature compensation of bias current in open loop operation E1 - 12 NPN emitter. Used in conjunction with B1 for temperature compensation of bias current in open loop operation. IBIASOUT 9 13 Bias current output. IBIASSET - 14 Reference current output for control of bias current when feedback photodetector is not used. IPIN 10 15 Control input for bias current control circuit. GND 11 16 Ground pin. OUTN 12 17 Modulator output. Draws current when DIN=0. OUT2N 12 18 Modulator output. Draws current when DIN=0. OUTP 13 19 Modulator output. Draws current when DIN=1. OUT2P 13 20 Modulator output. Draws current when DIN=1. VCCO 14 21 Positive supply for modulator and bias circuit outputs. VCCA - 22 Positive supply for circuits other than modulator and bias outputs. VCCA 15 23 Positive supply for circuits other than modulator and bias outputs. IMODSET 16 24 Control input for modulation current setting circuit. Function 1 Failout is connected to Disable internal to the QSOP16 package. As a result, a fault condition will disable the laser drive circuitry. PRELIMINARY INFORMATION PAGE -2- MC2062_F MC2062 3.3 to 5V Laser/VCSEL Driver IC for Applications from 100Mbps to 1.25Gbps ABSOLUTE MAXIMUM RATINGS Symbol Parameter Rating Units 6 V VCC Power Supply (VCC-Gnd) TA Operating ambient -40 to +85 C Storage temperature -65 to +150 C TSTG RECOMMENDED OPERATING CONDITIONS Symbol Parameter VCC Power supply (VCC-GND) TA Operating ambient Rating Units 3 to 5.5 V -40 to +85(1) C 1 Check with Microcosm for allowable combinations of package/thermal resistance, power supply voltage and drive currents. AC CHARACTERISTICS Symbol IMODOUT Parameter Modulation current available at each output Modulation current into VCSEL IMOD(VCSEL) ZVCSEL=50 ZVCSEL=25 1 Min. Typ. Max. Units 40 - - mApp - 16 26 - mApp tR, tF Modulation current rise/fall times (10-90% points) at modulator output pins with loads of 50 to positive supply. - - 250 ps TCIOUT Range of programmable temperature coefficient on modulation current. -250(1) - >10,000 ppm/C tPWD Modulation current pulse width distortion - - TBD % MIMOD Modulation current multiplier - 96 - A/A CIMOD Modulation current offset - -2 - mA This is the value with no external temperature compensation set. PRELIMINARY INFORMATION PAGE -3- MC2062_F MC2062 3.3 to 5V Laser/VCSEL Driver IC for Applications from 100Mbps to 1.25Gbps DC CHARACTERISTICS Symbol RIN RN, RP Parameter On-chip resistance DIN to DIN (for impedance matching to input bond wires) On-chip modulator pull-up resistors.(1) Min. Typ. Max. Units - 600 - 65 75 85 VIH PECL Input High VCC-1150 - VCC-800 mV VIL PECL Input Low VCC-1900 - VCC-1500 mV VCIH Enable and Disable Input High - 0.66xVCC - V VCIL Enable and Disable Input Low - 0.33xVCC - V ICC Supply current - IMOD+ IBIAS+14mA - mA IBIAS Maximum programmable bias current 20 - - mA -1,000(2) - >20,000 ppm/C - 2.4 - V TCBIASOUT Range of programmable temperature coefficient on Bias Current (open loop operation) VSUPTH Supply detection threshold. VREF1 Voltage ref. used for mod current control 1.15 1.2 1.25 V VREF2 Voltage ref. used for bias current control VCCA-1.25 VCCA-1.2 VCCA-1.15 V VREF3 Upper voltage ref. used to monitor bias control loop. VCCA-1.15 VCCA-1.1 VCCA-1.05 V VREF4 Lower voltage ref.used to monitor bias control loop VCCA-1.35 VCCA-1.3 VCCA-1.25 V MIBIAS Bias current multiplier - 39 - A/A RRESET Pull-up resistor connected to RESET pin 400 500 600 k CIBIAS Bias current offset. - -1 - mA 1 The value of this on-chip resistor is mask-programmable. Contact Microcosm for details on how to match this value to your desired VCSEL. 2 This is the value with no external compensation set. PRELIMINARY INFORMATION PAGE -4- MC2062_F MC2062 3.3 to 5V Laser/VCSEL Driver IC for Applications from 100Mbps to 1.25Gbps TYPICAL PERFORMANCE CURVES Bias Current vs Bias Setting Resistance Bias Current vs Bias Setting Current 255 144 122 200 Bias Current (mA) Bias Current (mA) 100 155 100 88 66 44 55 22 00 00 0 5 10 15 Bias Setting Resistance (k) 20 25 0 Open Loop Bias Current with Temperature 0.05 0.1 0.15 0.2 Bias Setting Current (mA) 0.25 0.3 0.35 Modulation Current vs Modulation Setting Resistance 5 5 25 35 0 30 Modulation Current (mA) 200 Temp -40C Bias Current (mA) Temp +85C 155 100 255 200 155 100 55 55 0 0 0 0 2 3 4 5 6 7 8 Bias Setting Resistance (k) 9 10 11 12 0 5 10 15 20 Modulation Setting Current (k) 25 30 Modulation Current vs Modulation Setting Current 242 Modulation Current (mApp) 200 168 126 84 42 0 0 0 0.02 0.04 0.06 0.08 0.10 Modulation Setting Current (mA) PRELIMINARY INFORMATION 0.12 0.14 PAGE -5- MC2062_F MC2062 3.3 to 5V Laser/VCSEL Driver IC for Applications from 100Mbps to 1.25Gbps EYE DIAGRAMS Electrical Eye @ 25C Electrical Eye @ -40C Electrical Eye @ +85C Optical Eye (850nm Vcsel) PRELIMINARY INFORMATION PAGE -6- MC2062_F MC2062 3.3 to 5V Laser/VCSEL Driver IC for Applications from 100Mbps to 1.25Gbps FUNCTIONAL BLOCK DIAGRAM VCCA VCC0 VCCO 75 75 OutN On-chip VCC for Bias Circuit Drive enable Out2N DIN OutP Out2P Modulator VCC DIN B1 x1 x M IMOD (96) Drive Enable E1 IMODSET Mirror Reference Circuit IPIN VREF2 (Vcc-1.2V) x1 C2 IBIASSET B2 VREF2 Reference Circuit Comparator GND Supply Detector (1.2V) VREF4 x M IBIAS(39) Reference Circuit (1.35V) Supply Okay IBIASOUT VREF3 (1.1V) BiasOkay Reset Enable Drive Enable Safety Logic Disable Failout FUNCTIONAL DESCRIPTION The MC2062 VCSEL driver provides a high speed modulator together with the circuits for setting the modulation current, controlling the bias current and for monitoring bias control loop and supply level. CMOS logic inputs may be connected to control the MC2062, and a CMOS output is provided to indicate a detected failure of the bias control loop. High Speed Modulator The modulator is connected to the self-biased PECL data inputs (DIN and DIN). The modulator steers the modulation current between outputs OUTN/OUT2N and OUTP/OUT2P. The pairs of outputs are identical and are connected in parallel. The resistors connected to pins IMODSET, C2 and B2 are used to set the modulation current and temperature coefficient of modulation current. Bias Generator second circuit on page 9 shows the configuration that may be used to achieve the desired bias current and temperature coefficient when a feedback photodiode is not used (open loop). In both cases the voltage at pin IPIN is equal to the voltage VREF2. A further reference circuit and a window comparator detect whether the voltage at pin IPIN is between the voltages VREF3 and VREF4. Three separate bandgap voltage reference circuits provide the voltage references VREF1, VREF2 and VREF3/VREF4. Power Supply level detection is provided by the Supply Detector circuit. The output of this circuit indicates whether the supply is above the threshold VSUPTH. There is an on-chip switch in series with the positive supply to the Bias circuit. The safety logic output "Drive Enable" closes or opens this switch to turn the Bias circuit on, or off, respectively. The first application circuit on page 8 shows how the bias current can be controlled when a feedback photodetector is available (closed loop operation). The PRELIMINARY INFORMATION PAGE -7- MC2062_F MC2062 3.3 to 5V Laser/VCSEL Driver IC for Applications from 100Mbps to 1.25Gbps FUNCTIONAL DESCRIPTION This diagram shows the detail of the Safety Logic. The bias circuit may be switched off using the ENABLE or DISABLE pin. It is also switched off if the supply is low. ENABLE SUPPLY OK DRIVE ENABLE DISABLE Rreset ( 5 0 0 K S BIAS OK If failure of the bias control circuit is detected, this condition is latched and indicated at the pin FAILOUT. The latch is RESET when the condition that ENABLE and SUPPLY OK are both true, is re-established. The length of the reset pulse is determined by the size of the external capacitor in combination with the internal 500k resistor. Q FAILOUT R Latch Reset has precedence over Set RESET GND Safety Logic TYPICAL APPLICATIONS CIRCUIT Closed Loop Operation R M3 R M1 R M2 V CC 100nF GND 3 RESET B2 C2 IM O D S E T V CCA GND 2 V CCA VCCO OUT 2P D IN V CC R EXT MODULATOR OUT P D IN ENABLE R EXT OUT 2N SAFETY LOGIC BIAS V CC DISABLE V CC 100nF OUT N VCC FAIL OUT B1 E1 IB I A S O U T IB I A S S E T IPIN GND 0 R B1 VCC N/C Resistor or Ferrite PRELIMINARY INFORMATION PAGE -8- MC2062_F MC2062 3.3 to 5V Laser/VCSEL Driver IC for Applications from 100Mbps to 1.25Gbps TYPICAL APPLICATIONS CIRCUIT Open Loop Operation R M3 R M1 R M2 VCC 100nF GND 3 RESET B2 IM O D S E T C2 VCCA GND 2 VCCA VCCO V CC OUT 2P D IN R EXT MODULATOR OUT P D IN ENABLE OUT 2N SAFETY LOGIC BIAS FAIL OUT B1 E1 OUT N IB I A S O U T IB I A S S E T 100nF R B3 100nF V CC DISABLE R B2 V CC R EXT IPIN GND 0 Resistor or Ferrite R B1 V CC V CC PRELIMINARY INFORMATION PAGE -9- MC2062_F MC2062 3.3 to 5V Laser/VCSEL Driver IC for Applications from 100Mbps to 1.25Gbps DESIGN INFORMATION the temperature coefficient of IBIASOUT with no programmed compensation - see DC Characteristics. Typical Closed Loop Application Setting Bias Current for Closed Loop Operation When the VCSEL includes a monitor photodiode, the closed loop scheme should be adopted. The voltage at IPIN is equal to VCC-1.2V, so the voltage across RB1 is 1.2V. The automatic power control loop increases or decreases IBIASOUT such that the current from the monitor photodiode (and the VCSEL output power) remains constant. Knowing the monitor photodiode current (IPD) at the desired output power, RB1 is set as follows: RB1 = 1.2V x MIBIAS IBIAS-CIBIAS where MIBIAS is a bias current multiplier and CIBIAS is an offset - see DC Characteristics. RB1 = 1.2V/IPD Typical Open Loop Application Setting Bias Current for Open Loop Operation: When driving a device in open loop operation without a monitor photodiode, refer to the arrangement on page 9. The MC2062 can be configured to set VCSEL bias current with or without temperature compensation. First calculate the nominal bias current: IBIAS = ITH + When not programming temperature compensation, the typical temperature coefficient of bias current is -1000ppm/C. For this condition (no additional temperature compensation), connect RB1 between IPIN and VCC (RB2 and RB3 are not required). Knowing the desired VCSEL bias current, RB1 is calculated as follows: RB1 = 0.55V x MIBIAS IBIAS-CIBIAS Finally, when more temperature compensation is required for IBIAS, use the configuration as shown on page 9. The procedure for selecting the values for RB1, RB2, and RB3 is as follows: Pavg where Ith is the threshold current (in mA), Pavg is the average power (in mW), and is the VCSEL slope efficiency (in mW/mA). Next, the required temperature coefficient of bias current must be calculated. Note that with the modulation output AC coupled, the temperature coefficient of the VCSEL slope efficiency also affects the overall desired temperature coefficient of bias current: Pavg (TCITH x ITH) - TC x -TCIBIASOUT TCIBIAS = IBIAS where TCITH is the temperature coefficient of threshold current (in ppm/C), TC is the slope efficiency temperature coefficient (in ppm/C), and TCIBIASOUT is PRELIMINARY INFORMATION As noted, programming the bias current as listed above yields a temperature coefficient of -1000ppm/ C. By connecting pin B1 to VCC and connecting RB1 between pin E1 and IPIN, the bias current is typically 2000ppm/C. With this configuration, RB1 is set as follows (RB2 and RB3 are not required): 1. Calculate the voltage at pin E1: VE1 = TCIBIAS x 1.2V TCIBIAS + 3000 where VE1 is the number of volts below VCC. 2. Calculate I(IBIASSET): I(IBIASSET) = IBIAS-CIBIAS MIBIAS where MIBIAS is the bias current multiplier and CIBIAS is an offset- see DC Characteristics. 3. Calculate RB1: RB1 = 1.2-VE1 I(IBIASSET) 4. Calculate the values for the temperature compen- PAGE -10- MC2062_F MC2062 3.3 to 5V Laser/VCSEL Driver IC for Applications from 100Mbps to 1.25Gbps DESIGN INFORMATION When not programming temperature compensation, the typical temperature coefficient of modulation current is -250ppm/C. For this condition (no additional temperature compensation), connect Rm1 between Imodset and GND (RM2 and RM3 are not required). RM1 is calculated as follows: sation resistors, RB2 and RB3: RB 2 = 0.65V 0.5xI (IBIASSET ) RB3 = VE1-0.65V 0.5 x I(IBIASSET) RM1 = The factor of 0.5 in the denominator of both equations sets the current through the temperature compensation transistor to half of IBIASSET, allowing for adjustment of RB1 without impacting the temperature compensation. Setting Modulation Current: Refer to page 8 or 9. The modulation output current, IMOD, from the Modulator is given by: Where I(IMODSET) is the current output at pin IMODSET, MIMOD is a multiplier and CIMOD is an offset current - see AC Characteristics. With the circuit configured as shown, the voltage at pin IMODSET is equal to VREF1. First, calculate IMODOUT: IMODOUT = As noted, programming the modulation current as listed above yields a temperature coefficient of -250ppm/C. By connecting pin C2 to B2 and connecting RM1 between pin C2/B2 and IMODSET, the temperature coefficient of modulation current is roughly 2750ppm/C. With this configuration, RM1 is set as follows (RM2 and RM3 are not required): RM1 = IMODOUT = I(IMODSET) X MIMOD + CIMOD 1.2V I(Imodset) 0.65V I(IMODSET) Finally, when more temperature compensation is required for Imodout, use the configuration as shown on pages 8 and 9. The procedure for selecting the values for RM1, RM2, and RM3 is as follows: 1.Calculate the voltage at pin C2: IMODVCSEL x (RSER + RSHUNT ) VC2 = RSHUNT Where RSHUNT = REXT // 75 TCIMOD x 1.2V TCIMOD + 3000 2. Calculate RM1: Where IMODVCSEL is the modulation current required for the VCSEL itself, RSER is the VCSEL series resistance, and RSHUNT is the shunt pull-up resistance to Vcc. Keep in mind that any external value of pull-up resistance is in parallel with 75 internal on the MC2062. RM1 = 1.2-VC2 I(IMODSET) 3. Calculate the values for the temperature compensation resistors, RM2 and RM3: From the previous equation, RM2 = VC2-0.65V 0.5 x I(IMODSET) Next, the required temperature coefficient of modulation current must be determined: RM3 = 0.65V 0.5 x I(IMODSET) TCIMOD = -TC - TCIOUT The factor of 0.5 in the denominator of both equations sets the current through the temperature compensation transistor to half of I(IMODSET), allowing for adjustment of RM1 without impacting the temperature compensation. Imodout - CImod I(Imodset) = MImod where TCIOUT is the temperature coefficient of IMODOUT with no programmed compensation - see AC Characteristics. PRELIMINARY INFORMATION PAGE -11- MC2062_F MC2062 3.3 to 5V Laser/VCSEL Driver IC for Applications from 100Mbps to 1.25Gbps BARE DIE INFORMATION Pad Centres X Y C2 -525 -75 IBIASOUT 525 75 B2 -525 -225 IBIASSET 525 225 RESET -525 -375 IPIN 525 375 GND1 -375 -525 GND0 375 525 GND2 -225 -525 OUTN 225 525 DIN -75 -525 OUT2N 75 525 DIN 75 -525 OUTP -75 525 ENABLE 225 -525 OUT2P -225 525 DISABLE 375 -525 VCCO -375 525 FAILOUT 525 -375 VCCA -525 375 B1 525 -225 VCCA -525 225 E1 525 -75 IMODSET -525 75 OUTP VCCO Chip Layout GND0 Description OUTN Y OUT2N X OUT2P Description VCCA IPIN VCCA IBIASSET Microcosm 1999 MC2062 IMODSET IBIASOUT C2 E1 B2 B1 PRELIMINARY INFORMATION PAGE -12- DISABLE ENABLE DIN DIN GND2 Dimensions: Pad size 90x90 Die Size 1280x1280 FAILOUT GND1 RESET MC2062_F MC2062 3.3 to 5V Laser/VCSEL Driver IC for Applications from 100Mbps to 1.25Gbps PACKAGE INFORMATION 24 Lead Thin Small Shrink Outline Package (TSSOP) Dims Tols/Leads 20L 24L Dims Tols/Leads 20L 24L e Z D N A (DATUM -B-) E E1 MAX. A1 ddd C 2X N/2 TIPS B A A A D BASIC .65 .05 MIN/.10 MAX b + .05 .22 .90 c 6 END VIEW (DATUM -A-) A e 4 B 1 1.20 5 5 A2 NOM. D + .05 E + .10 E1 .13 MIN/.20 MAX TOP VIEW e + 4 4 6.40 aaa MAX. .10 + .10 4.40 bbb MAX. .10 L +.15/-.10 .60 ccc MAX. .05 L1 REF. 1.00 ddd MAX. .20 Zp REF. .325 6.50 7.80 b A2 ccc S aaa C c c1 A C A1 b1 b SECTION A-A SIDE VIEW 7 TYP. 10 TYP. 0.127 REF. A2 R = A R1 = 0.15 8 0.1 GAGE PLANE H SEATING PLANE S = 0.20 0.25 REF. A1 O 7 TYP. L (L1 = 1.00) 16 Lead Quarter Small Outline Package (QSOP) 7 TYP A2 A A1 STAND-OFF A e - A7 TYP. Dims Tols/N 16 Dims Tols/N 16 A MAX. 1.60 ccc MAX. 0.10 A1 + .05 0.1 ddd MAX. 0.10 A2 + .10 1.40 e BASIC 0.65 D + .10 4.9 b + .05 0.25 E + .20 6.00 c + .05 .2 min .24 max E1 + .10 3.90 R + .05 0.20 L + .05 0.6 R1 MIN. 0.20 D E E1 BOTTOM VIEW 0.38X45 R1 R STAND-OFF L PRELIMINARY INFORMATION 0~80 SEATING PLANE PAGE -13- MC2062_F Microcosm CONTACT INFORMATION CORPORATE OFFICES Corporate Headquarters Microcosm Communications Limited Castlemead Lower Castle Street Bristol BS1 3AG United Kingdom Telephone: (+44) 117 930 2400 Fax: (+44) 117 930 2401 e-mail: microcosm@mcosm.co.uk www.mcosm.co.uk Distributors World Wide Direct Sales China/Hong Kong Americas WZT Corporation 5/F, Hua Ying Building Nan You Road Shen Zhen China Telephone: (+86) 755 664 6166 Fax: (+86) 755 640 9678 e-mail: szwztlec@public.szptt.net.cn Microcosm Communications Limited 10855 SW Falcon Court Beaverton OR 97007 USA Telephone: (+503) 590 0540 Fax: (+503) 590 3717 e-mail: steve0010@msn.com Korea Europe, Rest of World UTO International Corporation Union Center #801 837-11 Yeok-sam Dong, Kang-Nam Gu Seoul 135-080 Korea Telephone: (+82) 2 501 5665 Fax: (+82) 2 508 3250, (+82) 2 501 0023 e-mail: utokorea@utocorp.com Microcosm Communications Limited Castlemead Lower Castle Street Bristol BS1 3AG United Kingdom Telephone: (+44) 117 930 2400 Fax: (+44) 117 930 2401 e-mail: christian.hess@mcosm.co.uk Taiwan Germany Jeritronics Limited Floor 7F, No.267, Sec. 3 Cheng-Teh Road Taipei Taiwan R.O.C. Telephone: (+02) 2585 1636 Fax: (+02) 2586 4736 e-mail jeritron@tpts1.seed.net.tw Microcosm Communications Limited Noldestr. 1 66787 Wadgassen Germany Telephone: (+49) 6834 609 0000 Fax: (+49) 6834 609 0001 e-mail: cristian.hess@mcosm.co.uk Israel Japan Microcosm Communications 793-9 Nakagawa Omiya-city Saitama 330-0831 Japan Telephone: (+81) 48 680 6102 Fax: (+81) 48 680 1656 e-mail: tatsuyuki_torii@csi.com Avnet Gallium 11 Hasadna Str 43650 Raanana Israel Telephone: (+972) 9 748 2182 ext 306 Fax: (+972) 9 748 4046 e-mail: amir.b@gallium.co.il Microcosm reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Microcosm cannot assume responsibility for any problems arising out of the use of these circuits. PRELIMINARY INFORMATION PAGE -14- MC2062-1_F