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19-3252; Rev 0; 5/04
270Mbps SFP LED Driver MAX3967
General Description
The MAX3967 is a programmable LED driver for fiber optic transmitters operating at data rates up to 270Mbps. The circuit contains a high-speed current driver with programmable temperature coefficient (tempco), adjustments for LED prebias voltage, and a disable feature. The circuit accepts PECL data inputs, and operates from a single +2.97V to +5.5V power supply. The SFP LED driver can switch up to 100mA into typical high-speed light-emitting diodes. As temperature increases, the device's modulation current increases with a tempco that is programmable from 2500ppm/C to 12,000ppm/C. The modulation current is programmed with a single external resistor. The MAX3967's LED prebias voltage is programmable from 400mV to 925mV. The prebias circuit produces peaking current, which improves the LED switching speed. Complementary current outputs help to maintain a constant supply current, reducing EMI and supply noise generated by the transmitter module. The MAX3967 is available in die form, or in a 4mm x 4mm, 24-pin thin QFN package. TX_DISABLE for SFP Compatibility Single +2.97V to +5.5V Power Supply Adjustable Temperature Compensation Adjustable Modulation Current Complementary Output Reduces Supply Noise Programmable LED Prebias Voltage Available in 24-Pin QFN or Die
Features
Ordering Information
PART MAX3967ETG MAX3967E/D TEMP RANGE -40C to +85C -40C to +85C PIN-PACKAGE 24 Thin QFN Dice*
*Dice are tested and guaranteed only at TA = +25C.
Applications
Multimode LED Transmitters Fast Ethernet/FDDI 155Mbps LAN ATM Transceivers ESCON Receivers SFP Transceivers
TCNOM TC PB1 PB2 1 2 3 TOP VIEW TCMIN VEE TX_DISABLE
Pin Configuration
24
23
22
21
20
19 18 17 16 MODSET MON N.C. VCC VCCOUT VCCOUT
MAX3967
4 5 6 7 VEEOUT 8 OUT+ 9 OUT+ 10 OUT11 OUT12 N.C. 15 14 13
Typical Operating Circuits appear at end of data sheet.
PB3 VEEOUT
THIN QFN (4mm x 4mm)
THE EXPOSED PAD MUST BE CONNECTED TO GROUND FOR PROPER THERMAL AND ELECTRICAL PERFORMANCE
________________________________________________________________ Maxim Integrated Products
VCC
IN+
IN-
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
270Mbps SFP LED Driver MAX3967
ABSOLUTE MAXIMUM RATINGS
Supply Voltage at VCC, VCCOUT (VEE, VEEOUT = 0V) ..............................................-0.5V to +7V Current into OUT+, OUT- ................................-40mA to +160mA Differential Output Voltage (OUT+ to OUT-) .........-3.3V to +3.3V Voltage at PB1, PB2, PB3, IN+, IN-, OUT+, OUT-, TX_DISABLE......-0.5V to (VCC + 0.5V) Voltage at TCMIN, TCNOM, TC, MODSET, MON ....-0.5V to +2V Continuous Power Dissipation (TA = +85C) 24-Lead Thin QFN (derate 20.8mW/C above +85C).............................................................1354mW Operating Junction Temperature Range ...........-40C to +150C Die Attach Temperature...................................................+400C Storage Temperature Range .............................-50C to +150C Lead Temperature (soldering, 10s) .................................+300C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(Load as specified in Figure 1; VCC = +2.97V to +5.5V (at the VCC pins); VEE, VEEOUT = 0V; TA = -40C to +85C, unless otherwise noted. Temperature coefficients are referenced to TA = +25C. Typical values are at VCC = +3.3V, TA = +25C, unless otherwise noted. Dice are tested at TA = +25C only.)
PARAMETER Data Input High Voltage Data Input Low Voltage Supply Current Input Current at IN+ or INRMODSET = 698 (Note 2) Modulation Current RMODSET = 3.0k (Note 3) (Note 3) PB1, PB2, PB3 = (open, open, open) Prebias Voltage PB1, PB2, PB3 = (VEE, VEE, open) PB1, PB2, PB3 = (VEE, VEE, VEE) Maximum tempco (TC open) Temperature Coefficient of Modulation Current Prebias Resistor TX_DISABLE Resistance TX_DISABLE High TX_DISABLE Low Monitor Gain VIH VIL IMON / IMODSET, VMON < 1.1V, RMODSET = 1k, TC = TCMIN 0.92 1 RPREBIAS Resistance to VEE (Note 4) Nominal tempco (TC shorted to TCNOM) Minimum tempco (TC shorted to TCMIN) 66 50 2.0 0.8 1.08 TA = -40C TA = +25C TA = +85C TA = -40C TA = +25C TA = +85C 66.0 0.368 0.575 0.848 ICC SYMBOL CONDITIONS Referenced to VCC, DC-coupled input Referenced to VCC, DC-coupled input (Note1) -50 110 124 139 14 18 22 75 0.400 0.625 0.925 12,000 3600 2500 78 65 90 100 k V V A/A ppm/C 84.5 0.451 0.696 1.026 V mA MIN -1.165 -1.810 30 TYP MAX -0.880 -1.475 39 +50 UNITS V V mA A
Note 1: RMODSET = 1k. Excludes IOUT+ and IOUT-, TX_DISABLE high or low. Note 2: TC connected to TCMIN. Note 3: VCC = +3.3V, VLED = 1.55V, prebias voltage programmed at 0.625V (nominal), TA = +25C. RMODSET = 1k, (programs approximately 80mA), TC connected to TCNOM. Note 4: The TX_DISABLE pin is internally pulled low. The driver is enabled when TX_DISABLE is left open.
2
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270Mbps SFP LED Driver
AC ELECTRICAL CHARACTERISTICS
(Load as specified in Figure 1, unless otherwise noted. VCC = +2.97V to +5.5V (at the VCC pins), RMODSET = 1k, TA = -40C to +85C. Input data edge speed = 1ns (typ), PB1 = PB2 = VEE, PB3 = open. Typical values are at VCC = +3.3V, TC connected to TCNOM, TA = +25C.) (Note 5)
PARAMETER Data Input Range Output-Current Edge Speed Output-Current Pulse-Width Correction (PWC) Output-Current Data-Dependent Jitter Random Jitter TX_DISABLE Assert Time TX_DISABLE Negate Time Power-On Time DJ RJ t_off t_on t_init Time from rising edge of TX_DISABLE to output at 10% of steady state Time from rising edge of TX_DISABLE to output at 90% of steady state Time from VCC > 2.97V to output at 90% of steady state SYMBOL CONDITIONS Differential input 20% to 80%, input is a 12.5MHz square wave Note 6 266Mbps (Note 7) 155Mbps (Note 8) MIN 500 300 615 -80 140 150 3 0.01 0.01 0.1 0.5 0.5 2 250 TYP MAX 2400 1230 UNITS mVP-P ps ps psP-P psRMS s s ms
MAX3967
Note 5: Note 6: Note 7: Note 8:
AC characteristics are guaranteed by design and characterization. PWC = (widthCURRENT ON - widthCURRENT OFF) / 2. Test pattern is a K28.5 (0011 1110 1011 0000 0101) transmitted at 266Mbps. Test pattern is equivanlent to a 213 - 1 PRBS containing 72 consecutive zeros or 72 consecutive ones.
VCC VCC VLED 1.55V VCC VPREBIAS
OUTOUT+ OUTL1 FERRITE BEAD
OSCILLOSCOPE
0.1F
OUTOUT+
50 5
MAX3967
MAX3967
MAX3967
0.1F
50
SWITCHING DIODE OUT+
DC ELECTRICAL LOAD (EXCEPT PREBIAS VOLTAGE)
DC ELECTRICAL LOAD FOR PREBIAS VOLTAGE
AC ELECTRICAL LOAD
Figure 1. MAX3967 Output Test Loads
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3
270Mbps SFP LED Driver MAX3967
Typical Operating Characteristics
(MAX3967ETG in Maxim evaluation board, VCC = +3.3V, PB1 = PB2 = VEE, PB3 = open, TC connected to TCNOM, RMODSET = 1k, TA = +25C, unless otherwise noted.)
SUPPLY CURRENT vs. TEMPERATURE
MAX3967 toc01
MODULATION CURRENT vs. TEMPERATURE
MAX3967 toc02
DIE MODULATION CURRENT vs. TEMPERATURE
MAX3967 toc03
40 38 36 SUPPLY CURRENT (mA) 34 32 30 28 26 24 22 20 VCC = 3.3V VCC = 5.0V EXCLUDES CURRENT INTO OUT+ AND OUT-
120 NOMINAL TEMPCO MODULATION CURRENT (mA) 100 80 60 40 MAXIMUM TEMPCO 20 0 MINIMUM TEMPCO
120 100 80 60 MAXIMUM TEMPCO 40 20 0 NOMINALTEMPCO MINIMUM TEMPCO
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 AMBIENT TEMPERATURE (C)
-40
-20
0
20
40
60
80
MODULATION CURRENT (mA)
0
20
40
60
80
100
120
140
AMBIENT TEMPERATURE (C)
JUNCTION TEMPERATURE (C)
MODULATION CURRENT TEMPCO vs. RTC
MAX3967 toc04
MODULATION CURRENT vs. RMODSET
MAX3967 toc05
DIE MODULATION CURRENT vs. RMODSET
MAX3967 toc06
100,000 MODULATION CURRENT TEMPCO (ppm/C)
200 NOMINALTEMPCO MODULATION CURRENT (mA) 100 MINIMUM TEMPCO
200
MODULATION CURRENT (mA)
100
MINIMUM TEMPCO
10,000
MAXIMUM TEMPCO
NOMINALTEMPCO MAXIMUM TEMPCO
1000 1 10 RTC (k) 100
10 500 1k RMODSET () 10k
10 500 1k RMODSET () 8k
EYE DIAGRAM (ELECTRICAL) 266Mbps
MAX3967 toc07
EYE DIAGRAM (OPTICAL) 155Mbps
MAX3967 toc08
EYE DIAGRAM (OPTICAL) 155Mbps
MAX3967 toc09
500ps/div PATTERN = 231 - 1 PRBS
1ns/div RECEIVER BW = 200MHz, VCC = 2.97V, TA = +85C, PAVE = -17.1dBm, PATTERN = 231 - 1 PRBS
1ns/div RECEIVER BW = 200MHz, VCC = 5.5V, TA = -40C, PAVE = -15.8dBm, PATTERN = 231 - 1 PRBS
4
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270Mbps SFP LED Driver MAX3967
Typical Operating Characteristics (continued)
(MAX3967ETG in Maxim evaluation board, VCC = 3.3V, PB1 = PB2 = VEE, PB3 = open, TC connected to TCNOM, RMODSET = 1k, TA = +25C, unless otherwise noted.)
EYE DIAGRAM (OPTICAL) 155Mbps
MAX3967 toc10
EYE DIAGRAM (OPTICAL) 155Mbps
MAX3967 toc11
RANDOM JITTER vs. TEMPERATURE
MAX3967 toc12
6 5 RANDOM JITTER (psRMS) 4 3 2 1 0 VCC = 3.3V MAXIMUM TEMPCO
VCC = 5.0V MINIMUM TEMPCO 0 10 20 30 40 50 60 70 80 90 AMBIENT TEMPERATURE (C)
1ns/div RECEIVER BW = 200MHz, VCC = 5.5V, TA = +85C, PAVE = -17.1dBm, PATTERN = 231 - 1 PRBS
1ns/div RECEIVER BW = 200MHz, VCC = 2.97V, TA = -40C, PAVE = -15.8dBm, PATTERN = 231 - 1 PRBS
TX_DISABLE NEGATE TIME
MAX3967 toc13
TX_DISABLE ASSERT TIME
MAX3967 toc14
LED OUTPUT
LED OUTPUT
t_on TX_DISABLE TX_DISABLE
t_off
4ns/div
4ns/div
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5
270Mbps SFP LED Driver MAX3967
Pin Description
PIN 1 2 3, 4, 5 6, 7 8, 9 10, 11 12, 16 13, 14 15, 19 17 18 20 21 22 23 24 NAME TCNOM TC PB1, PB2, PB3 VEEOUT OUT+ OUTN.C. VCCOUT VCC MON MODSET ININ+ TX_DISABLE VEE TCMIN FUNCTION Shorting TC to TCNOM provides a modulation tempco of approximately 3600 ppm/C. A resistor (RTC) connected between the TC and TCMIN pins sets the tempco of the modulation current. Leaving RTC unconnected provides the maximum tempco. Programs the Prebias Voltage at the OUT+ Pin (Table 1) Ground for the Output-Current Drivers Current Output Pins Complementary Current Output Pins Not Connected Supply Connection for the Output-Current Drivers Provides Current to the Internal Amplifiers The Current Sourced from the MON Pin is Proportional to the Modulator Current A Resistor from MODSET to VEE Programs the LED Modulation Current Inverting Data Input Noninverting Data Input Transmit Disable. When high, the current at the OUT+ pins is in the low state. The transmitter is enabled when TX_DISABLE is open. Ground for internal amplifiers. Shorting TC to TCMIN provides the minimum modulation-current tempco.
Detailed Description
The MAX3967 provides a flexible current drive for the modulation of fiber optic light-emitting diodes (LEDs). The circuit is designed to be used with +3.3V or +5V power supplies. The IC provides up to 100mA of modulation current. An adjustable prebias current source sets the LED prebias voltage. An integrated resistor provides passive peaking and optical pulse-width compensation. Figure 2 shows a block diagram of the MAX3967, which comprises a reference-voltage generator, modulationcurrent generator, input buffer with disable, prebiascurrent generator, main output driver, complementary output driver, and LED-compensation network.
for the temperature characteristics of typical fiber optic LEDs. The first source has a temperature-stable output. The second source has a temperature-increasing output with a tempco of approximately 12,000ppm/C (relative to +25C). A resistor-divider between the two reference generators programs the modulation-current tempco. For maximum modulation-current tempco, leave the TC pin disconnected. For a tempco of approximately 3600ppm/C, connect TC to TCNOM. To obtain the minimum tempco, connect TCMIN to TC. Intermediate tempco values can be programmed by connecting an external resistor (RTC) between TCMIN and TC.
Input Buffer
The inputs are connected to the PECL-compatible differential input buffer. If left unconnected, IN+ is internally pulled to a PECL low and IN- is pulled to a PECL high, causing low current at OUT+. The input impedance of IN+ and IN- is approximately 50k.
Temperature Compensation
The reference-voltage generator circuit provides two voltage sources that create modulation-current temperature compensation. A positive modulation-current temperature coefficient (tempco) is useful to compensate
6
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270Mbps SFP LED Driver MAX3967
TX_DISABLE VCCOUT
OUTINPUT BUFFER 0 1 0 INMAX3967
IN+
5
COMPLEMENTARY OUTPUT 24X
MODULATIONCURRENT GENERATOR
MAIN OUTPUT 24X GAIN 4X
RPREBIAS 78 OUT+
VCC
REFERENCE-VOLTAGE GENERATOR
35
12pF
1.2V
V PREBIAS-CURRENT GENERATOR
TEMP
50
TCMIN
TCNOM
TC
MODSET RMODSET
MON PB1 PB2 PB3
Figure 2. Functional Diagram
Modulation-Current Generator
The modulation-current generator circuit provides control of the modulation-current amplitude. This amplitude is determined by the voltage at the MODSET pin and external resistor RMODSET. Do not connect bypass capacitors at the MODSET pin. Capacitance at this pin increases high-frequency output noise. The MON pin provides an optional modulation-current monitor. The current sourced from the MON pin is 1/96 of the modulation current. If used, the pin should be connected to VEE through a resistor. The resistance must be chosen so the voltage on MON does not exceed 1.1V. If not used, leave MON open.
Prebias Current Generator
A prebias voltage (V PREBIAS) can be applied to the LED to improve switching speed. The prebias current generator creates a current that flows through the 78 prebias resistor in the output stage, creating a prebias voltage. The prebias voltage can be adjusted by selectively connecting pins PB1, PB2, and PB3 to VEE. Table 1 describes the functions of PB1, PB2, and PB3.
Output Current Drivers
The modulation-current reference is switched and amplified by the output stages. LED package lead inductance causes ringing and overshoot, which can be compensated with an RC filter network. The MAX3967 includes 35 and 12pF of inter7
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270Mbps SFP LED Driver MAX3967
Table 1. LED Prebias Voltage
PB1 Open VEE Open VEE Open VEE Open VEE PB2 Open Open VEE VEE Open Open VEE VEE PB3 Open Open Open Open VEE VEE VEE VEE PREBIAS (V) 0.400 0.475 0.550 0.625 0.700 0.775 0.850 0.925
See the Modulation-Current Tempco vs. RTC graph in the Typical Operating Characteristics to program a custom tempco. From the graph, determine the appropriate resistor and connect it between TCMIN and TC. For example, if an LED requires a 5000ppm/C tempco, choose RTC of 8.3k.
Program the Modulation Current
Determine the required modulation current at TA = +25C. Then select the appropriate value of RMODSET from the Modulation Current vs. RMODSET graph in the Typical Operating Characteristics. For example, to program 75mA modulation current, the graph indicates an RMODSET value of 750 for maximum tempco (12,000ppm/C) and 1k for nominal tempco (3600ppm/C). By interpolation, choose an RMODSET of 792 for a tempco of 5000ppm/C.
nal compensation. The compensation network can be optimized by adding additional components between VCCOUT and OUT+. The MAX3967 includes a complementary output driver, which is switched 180 out of phase with the main output. This configuration helps to maintain constant current flow from the voltage supply, reducing noise and EMI. A large diode and a 5 resistor are connected in series with the negative output (OUT-) to emulate the LED load at OUT+.
Program Prebias Voltage
Determine the LED prebias voltage that produces an acceptable trade-off between peaking current and extinction ratio. See Table 1 for PB1, PB2, and PB3 settings.
Layout Considerations
For optimum performance, total load inductance should not exceed 10nH. Load inductance includes LED inductance, LED package lead inductance, and circuitboard traces. Keep the connections between the MAX3967 OUT pins and the LED as short as possible to minimize inductance. Chip-and-wire (hybrid) technology reduces package inductance significantly, and provides the best possible performance. Use good high-frequency layout techniques and a multilayer board with an uninterrupted ground plane. Power supplies should be capacitively bypassed to the ground plane with surface-mount capacitors located near the power-supply pins.
Peaking Current
The prebias resistor provides peaking current to improve the LED switching speed. The peaking magnitude is given by the following equation: V -V IPEAK = LED PREBIAS 78 The peaking amplitude is equal for rising and falling data transitions.
Design Procedure
Select an LED
For best performance, select a high-efficiency, lowinductance LED. LED inductance causes large voltage swings and ringing.
Program the Modulation-Current Tempco
Select a modulation-current tempco that provides nearly constant LED output power as temperature varies. For the minimum tempco, connect TCMIN to the TC pin. For a tempco of approximately 3600ppm/C, connect TC to TCNOM and leave TCMIN unconnected. For the maximum tempco, leave TCMIN, TCNOM, and TC unconnected.
8
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270Mbps SFP LED Driver
Input Terminations Exposed-Pad Package
The exposed pad on the 24-pin QFN provides a very low thermal resistance path for heat removal from the IC.
PECL OUTPUT
MAX3967
MAX3967
IN+
Chip Information
TRANSISTOR COUNT: 327 SUBSTRATE CONNECTED TO VEE PROCESS: BIPOLAR DIE THICKNESS: 15 mils
50 VCC - 2V VCC
R1 RF OR NON-PECL OUTPUT R2
MAX3967
IN+
VCC
3.3 5.0
R1 82 68
R2 130 180
SINGLE-ENDED TERMINATION IS SHOWN. IN- SHOULD BE TERMINATED SIMILARLY.
Figure 3. Input Terminations
Applications Information
Wire-Bonding Die
The MAX3967 utilizes gold metalization, which provides high reliability. Make connections to the die with gold wire only, using ball-bonding techniques. Use caution if attempting wedge-bonding. Pad size is 4 mils x 4 mils (100m). Die thickness is typically 15 mils (375m).
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9
270Mbps SFP LED Driver MAX3967
Typical Operating Circuits
SFP TRANSMITTER +3.3V
FERRITE BEAD
10k VCC
DISABLE TX_DISABLE
VCCOUT OUT-
+3.3V
+3.3V OUT+
82 CIN
DIFFERENTIAL DATA
82
MAX3967
IN+ IN-
VEEOUT VEE
PB2 PB3 TCMIN TCNOM TC MODSET
CIN 120 120
PB1
RMODSET
SFP TRANSMITTER WITH DIGITAL MONITOR +3.3V
FERRITE BEAD
10k VCC
DISABLE TX_DISABLE
VCCOUT OUT-
+3.3V
+3.3V OUT+
82 CIN
DIFFERENTIAL DATA
82
MAX3967
IN+ IN-
VEEOUT VEE
CIN 120 120
MON PB1 PB2 PB3 TCMIN TCNOM TC MODSET
RMODSET
DIAGNOSTIC IC
RMON
10
______________________________________________________________________________________
270Mbps SFP LED Driver
Typical Operating Circuits (continued)
SFF TRANSMITTER WITH DISABLE VCC
FERRITE BEAD
MAX3967
VCC
DISABLE TX_DISABLE
VCCOUT OUT-
PECL DATA
IN+
OUT+
MAX3967
INMON PB1 PB2 PB3 TCMIN TCNOM TC
VEEOUT VEE
MODSET
RTC* *OPTIONAL COMPONENT
RMODSET
SFF TRANSMITTER WITHOUT DISABLE VCC
FERRITE BEAD
VCC
TX_DISABLE
VCCOUT OUT-
PECL DATA
IN+
OUT+
MAX3967
IN-
VEEOUT
MON PB1 PB2 PB3 TCMIN TCNOM TC MODSET
VEE
RMODSET
______________________________________________________________________________________
11
270Mbps SFP LED Driver MAX3967
Chip Topography
TX_DISABLE VEE IN+ IN-
Pad Coordinates
PAD NUMBER BP1 PAD NAME TCMIN TCNOM TC PB1 PB2 PB3 VEEOUT VEEOUT OUT+ OUT+ OUTOUTVCCOUT VCCOUT VCC MON MODSET VCC ININ+ TX_DISABLE VEE COORDINATES (m) X 0 0 0 0 0 0 0 0 180 296 480 596 804 804 804 804 804 804 624 492 308 176 Y 1464 1268 1060 876 744 560 116 0 0 0 0 0 0 124 528 1032 1240 1464 1464 1464 1464 1464
TCMIN
1 1
22 22
21 21
20 20
19 19
18 18
VCC
BP2 BP3 BP4
TCNOM
2 2
17 17
MODSET
BP5 BP6 BP7 BP8 BP9
TC
3 3
16 16
MON
PB1 PB2
4 4
5 5
1.83mm (72.0 mils)
BP10 BP11 BP12 BP13 BP14 BP15 BP16 BP17 BP18 BP19 BP20 BP21 BP22
PB3
6 6
15 15
VCC
VEEOUT VEEOUT
7 7 8 8 9 9 10 10 11 11 12 12
14 14 13 13
VCCOUT VCCOUT
(0, 0)
OUT+ OUT+ OUT- OUT1.17mm (46.1 mils)
12
______________________________________________________________________________________
270Mbps SFP LED Driver
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
MAX3967
PACKAGE OUTLINE 12, 16, 20, 24L THIN QFN, 4x4x0.8mm
21-0139
C
1 2
PART MAX3967ETG
PACKAGE TYPE 24 thin QFN (4mm x 4mm x 0.8mm)
PACKAGE CODE T2444-4
______________________________________________________________________________________
13
24L QFN THIN.EPS
270Mbps SFP LED Driver MAX3967
Package Information(continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
PACKAGE OUTLINE 12, 16, 20, 24L THIN QFN, 4x4x0.8mm
21-0139
C
2 2
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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