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19-0432; Rev 1b; 4/98
Single +5V, Fully Integrated, 155Mbps Laser Diode Driver
________________General Description
The MAX3263 is a complete, easy-to-program, single +5V-powered, 155Mbps laser diode driver with complementary enable inputs and automatic power control (APC). The MAX3263 accepts differential PECL inputs and provides complementary output currents. A temperature-stabilized reference voltage is provided to simplify laser current programming. This allows modulation current to be programmed up to 30mA and bias current to be programmed from up to 60mA with two external resistors. An APC circuit is provided to maintain constant laser power in transmitters that use a monitor photodiode. Only two external resistors are required to implement the APC function. The MAX3263's fully integrated feature set includes a TTL-compatible laser failure indicator and a programmable slow-start circuit to prevent laser damage. The slow-start is preset to 50ns and can be extended by adding an external capacitor.
____________________________Features
o Rise Times Less than 1ns o Differential PECL Inputs o Single +5V Supply o Automatic Power Control o Temperature-Compensated Reference Voltage o Complementary Enable Inputs
MAX3263
_______________Ordering Information
PART MAX3263CAG TEMP. RANGE 0C to +70C PIN-PACKAGE 24 SSOP
________________________Applications
Laser Diode Transmitters 155Mbps SDH/SONET 155Mbps ATM
_____________Typical Operating Circuit
+5V 0.01F VCCA VCCB +5V 0.01F +5V OUT+ PHOTODIODE IPIN
___________________Pin Configuration
TOP VIEW
VREF2 1 IPINSET 2 FAILOUT 3 GNDB 4 VIN+ 5 VIN- 6 GNDB 7 VCCB 8 24 SLWSTRT 23 IPIN 22 VCCA 21 GNDA
PECL INPUTS
VIN+ VINGNDA GNDB
LASER
MAX3263
ENB+ IBIASOUT
FERRITE BEAD +5V
MAX3263
20 OUT+ 19 GNDA 18 OUT17 GNDA 16 IBIASOUT 15 IMODSET 14 IBIASSET 13 IBIASFB VREF1 ENBSLWSTRT
OUTFAILOUT IBIASFB
2.7k
ENB- 9 ENB+ 10 VREF1 11 OSADJ 12
VREF2 IBIASSET IMODSET OSADJ IPINSET
SSOP ________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769.
Single +5V, Fully Integrated, 155Mbps Laser Diode Driver MAX3263
ABSOLUTE MAXIMUM RATINGS
Terminal Voltage (with respect to GND) Supply Voltages (VCCA, VCCB).............................-0.3V to +6V VIN+, VIN-, FAILOUT ................................................0V to VCC OUT+, OUT-, IBIASOUT ......................................+1.5V to VCC ENB+, ENB- ......................VCC or +5.5V, whichever is smaller Differential Input Voltage (| VIN+ - VIN- |).........................+3.8V Input Current IBIASOUT ............................................................0mA to 75mA OUT+, OUT- ........................................................0mA to 40mA IBIASSET ........................................................0mA to 1.875mA IMODSET...............................................................0mA to 2mA IPIN, IPINSET, OSADJ...........................................0mA to 2mA FAILOUT..............................................................0mA to 10mA IBIASFB................................................................-2mA to 2mA Output Current VREF1, VREF2.....................................................0mA to 20mA SLWSTRT ..............................................................0mA to 5mA Continuous Power Dissipation (TA = +70C) SSOP (derate 8mW/C above +70C) ..........................640mW Operating Temperature Range...............................0C to +70C Junction Temperature ......................................................+150C Storage Temperature Range .............................-55C to +175C
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
(VCC = VCCA = VCCB = +4.75V to +5.25V, TA = 0C to +70C, unless otherwise noted. Typical values are at VCC = +5V and TA = +25C.) PARAMETER Range of Programmable Laser Bias Current Reference Voltage Available Reference Current Supply Current PECL Input High PECL Input Low TTL High Input TTL Low Input FAILOUT Output High FAILOUT Output Low SYMBOL IBIAS VREF IREF IVCC VIH VIL VIH VIL VOH VOL Loaded with 2.7k pull-up resistor to VCC Loaded with 2.7k pull-up resistor to VCC 4.5 0.5 2 (Note 1) VCC - 1.165 VCC - 1.475 0.8 TA = +25C 3.15 3.3 12 50 CONDITIONS MIN TYP MAX 60 3.45 UNITS mA V mA mA V V V V V V
Note 1: IVCC = IVCCA + IVCCB, IBIAS = 60mA, IMOD = 30mA, and IPIN = 140A.
AC ELECTRICAL CHARACTERISTICS
(VCC = VCCA = VCCB = +4.75V to +5.25V, RLOAD (at OUT+ and OUT-) = 25 connected to VCC, TA = 0C to +70C, unless otherwise noted. Typical values are at VCC = +5V and TA = +25C.) (Note 2) PARAMETER Range of Programmable Modulation Current Modulation-Current Rise and Fall Time Aberrations, Rising and Falling Edge Modulation-Current PulseWidth Distortion SYMBOL IMOD tR, tF OS PWD CONDITIONS Minimum differential input swing is 1100mVp-p (Note 3) IBIAS = 25mA, IMOD = 12mA, 4ns unit interval; measured from 10% to 90% IMOD = 12mA, TA = +25C IBIAS = 25mA, IMOD = 12mA, 8ns period 15 100 MIN TYP MAX 30 1 UNITS mA ns % ps
Note 2: AC characteristics are guaranteed by design and characterization. Note 3: An 1100mVp-p differential is equivalent to complementary 550mVp-p signals on VIN+ and VIN-. 2 _______________________________________________________________________________________
Single +5V, Fully Integrated, 155Mbps Laser Diode Driver
__________________________________________Typical Operating Characteristics
(MAX3263CAG loads at OUT+ and OUT- = 25, VCC = VCCA = VCCB = +5V, TA = +25C, unless otherwise noted.)
RBIASSET vs. BIAS CURRENT
MAX3263-01
MAX3263
RMODSET vs. MODULATION CURRENT
MAX3263-02
RPINSET vs. MONITOR CURRENT
MAX3263-03
8 7 6
12 10 8 6 4
DIFFERENTIAL INPUT SWING = 1100 mVp-p
1,000,000
100,000 RMODSET (k) RPINSET () 30
RBIASSET (k)
5 4 3 2 1 0 0 20 IBIAS (mA) 40 60
10,000
1000 2 0 0 5 10 15 20 25 MODULATION CURRENT (mAp-p) 100 0 500 MONITOR CURRENT (A) 1000
PERCENT CHANGE IN MODULATION CURRENT vs. TEMPERATURE
MAX3263-04
PERCENT CHANGE IN BIAS CURRENT vs. TEMPERATURE
MAX3263-05
SUPPLY CURRENT vs. TEMPERATURE
48 SUPPLY CURRENT (mA) 46 44 42 40 38 36
MAX3263-06
10 8 6 % CHANGE (w.r.t. +25C) 4 2 0 -2 -4 -6 -8 -10 0 20 40 TEMPERATURE (C) 60
3 APC DISABLED 2 % CHANGE (w.r.t. +25C)
50
1
0
-1
-2 80 0 10 20 30 40 50 60 70 80 TEMPERATURE (C)
34 0 20 40 TEMPERATURE (C) 60 80
ALLOWABLE ROSADJ RANGE vs. MODULATION CURRENT
MAX3263-07
MAXIMUM MODULATION CURRENT vs. MINIMUM DIFFERENTIAL INPUT SIGNAL AMPLITUDE
MAXIMUM MODULATION CURRENT (mAp-p) 35 30 25 20 15 10 5 0 RMODSET = 1.2k ROSADJ = 2k
MAX3263-08
12 10 ALLOWABLE ROSADJ (k) 8 6 4 2 0 0 5 10 15 20 25 ALLOWABLE RANGE
40
30
0
400
800
1200
1600
2000
MODULATION CURRENT (mAp-p)
MINIMUM DIFFERENTIAL INPUT SIGNAL AMPLITUDE (mVp-p)
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Single +5V, Fully Integrated, 155Mbps Laser Diode Driver MAX3263
______________________________________________________________Pin Description
PIN 1 2 NAME VREF2 IPINSET FUNCTION Temperature-Compensated Reference Output. VREF2 is internally connected to VREF1. Monitor Photodiode Programming Input. Connect INPINSET to VREF1 or VREF2 through a resistor to set the monitor current when using automatic power control (see Typical Operating Characteristics). Failout Output. Active-low, open-collector TTL output indicates if automatic power-control loop is out of regulation due to insufficient monitor-diode current (when VPIN is below the 2.6V threshold). Connect FAILOUT to VCC through a 2.7k pull-up resistor. Ground for Voltage Reference and Automatic Power-Control Circuitry Noninverting PECL Data Input Inverting PECL Data Input +5V Supply Voltage for Voltage Reference and Automatic Power-Control Circuitry. Connect VCCB to the same potential as VCCA, but provide separate bypassing for VCCA and VCCB. Inverting Enable TTL Input. Output currents are enabled only when ENB+ is high and ENB- is low. Noninverting Enable TTL Input. Output currents are enabled only when ENB+ is high and ENB- is low. Temperature-Compensated Reference Output. VREF1 is internally connected to VREF2. Overshoot-Adjust Input. Connect to internal voltage reference through a resistor to adjust the overshoot of the modulation output signal (see Typical Operating Characteristics). Bias-Feedback Current Output. Output from automatic power-control circuit. Connect to IBIASSET when using APC. Laser Bias Current-Programming Input. Connect to internal voltage reference through a resistor to set bias current (see Typical Operating Characteristics). IBIASOUT = 40 x (IBIASSET + IBIASFB). Laser Modulation Current-Programming Input. Connect to internal voltage reference through a resistor to set modulation current (see Typical Operating Characteristics). IMOD = 20 x IMODSET. Laser Bias Current Output. Connect to laser cathode through an R-L filter network (see the Bias Network Compensation section). Ground for Bias and Modulation Current Drivers Modulation Output. When VIN+ is high and VIN- is low, OUT- sinks IMOD. Modulation Output. When VIN+ is low and VIN- is high, OUT+ sinks IMOD. +5V Supply Voltage for Bias and Modulation Current Drivers. Connect VCCA to the same potential as VCCB, but provide separate bypassing for VCCA and VCCB. Monitor Photodiode Current Input. Connect IPIN to photodiode's anode. Slow-Start Capacitor Input. Connect capacitor to ground or leave unconnected to set start-up time, tSTARTUP = 25.4k (CSLWSTRT + 2pF).
3 4, 7 5 6 8 9 10 11 12 13
FAILOUT GNDB VIN+ VINVCCB ENBENB+ VREF1 OSADJ IBIASFB
14
IBIASSET
15
IMODSET
16 17, 19, 21 18 20 22 23 24
IBIASOUT GNDA OUTOUT+ VCCA IPIN SLWSTRT
4
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Single +5V, Fully Integrated, 155Mbps Laser Diode Driver MAX3263
VCC
MAX3263
VIN+
OUT+ LASER
VINVCCA VCCB 20 x IMODSET GNDA GNDB 40 x IBIASSET +2.6V FAILOUT IBIASOUT OUTPHOTODIODE BIAS COMPENSATION
ENB+
ENB-
MAIN BIAS GENERATOR
COMPARATOR IPIN LOOPSTABILITY CAPACITOR 0.1F 1 x IPINSET
SLWSTRT BANDGAP REFERENCE
VCC x 3/5 TRANSCONDUCTANCE AMPLIFIER
IMODSET
IBIASSET
VREF1, VREF2
IBIASFB
IOSADJ
IPINSET
RPINSET RMODSET ROSADJ RBIASSET
Figure 1. Functional Diagram
_______________Detailed Description
The MAX3263 laser driver has three main sections: a reference generator with temperature compensation, a laser bias block with automatic power control, and a modulation driver (Figure 1). The reference generator provides temperature-compensated biasing and a voltage-reference output. The voltage reference is used to program the current levels of the high-speed modulation driver, laser diode, and PIN (p+, intrinsic, n-) monitor diode. The laser bias block sets the bias current in the laser diode and maintains it above the threshold current. A
current-controlled current source (current mirror) programs the bias, with IBIASSET as the input. The mirror's gain is approximately 40 over the MAX3263's input range. Keep the output voltage of the bias stage above 2.2V to prevent saturation. The modulation driver consists of a high-speed input buffer and a common-emitter differential output stage. The modulation current mirror sets the laser modulation current in the output stage. This current is switched between the OUT+ and OUT- ports of the laser driver. The modulation current mirror has a gain of approximately 20. Keep the voltages at OUT+ and OUT- above 2.2V to prevent saturation.
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Single +5V, Fully Integrated, 155Mbps Laser Diode Driver MAX3263
The overshoot mirror sets the bias in the input buffer stage (Figure 2). Reducing this current slows the input stage and reduces overshoot in the modulation signal. At the same time, the peak-to-peak output swing of the input buffer stage is reduced. Careful design must be used to ensure that the buffer stage can switch the output stage completely into the nonlinear region. The input swing required to completely switch the output stage depends on both ROSADJ and the modulation current. See Allowable ROSADJ Range vs. Modulation Current and Maximum Modulation Current vs. Minimum Differential Input Signal Amplitude graphs in the Typical Operating Characteristics. For the output stage, the width of the linear region is a function of the desired modulation current. Increasing the modulation current increases the linear region. Therefore, increases in the modulation current require larger output levels from the first stage. Failure to ensure that the output stage switches completely results in a loss of modulation current (and extinction ratio). In addition, if the modulation port does not switch completely off, the modulation current will contribute to the bias current, and may complicate module assembly. The APC circuit incorporates the laser diode, the monitor photodiode, the pin set current mirror, a transconductance amplifier, the bias set current mirror, and the laser fail comparator (Figure 1). Light produced by the laser diode generates an average current in the monitor photodiode. This current flows into the MAX3263's IPIN input. The IPINSET current mirror draws current away from the IPIN node. When the current into the IPIN node equals the current drawn away by IPINSET, the node voltage is set by the VCC x 3/5 reference of the transconductance amplifier. When the monitor current exceeds IPINSET, the IPIN node voltage will be forced higher. If the monitor current decreases, the IPIN node voltage is decreased. In either case, the voltage change is amplified by the transconductance amplifier, and results in a feedback current at the IBIASFB node. Under normal APC operation, IBIASFB is summed with IBIASSET, and the laser bias level is adjusted to maintain constant output power. This feedback process continues until the monitor-diode current equals IPINSET. If the monitor-diode current is sufficiently less than IPINSET (i.e., the laser stops functioning), the voltage on the IPIN node drops below 2.6V. This triggers the failout comparator, which provides a TTL signal indicating laser failure. The FAILOUT output asserts only if the monitordiode current is low, not in the reverse situation where the monitor current exceeds IPINSET. FAILOUT is an open-collector output that requires an external pull-up resistor of 2.7k to VCC. The transconductance amplifier can source or sink currents up to approximately 1mA. Since the laser bias generator has a gain of approximately 40, the APC function has a limit of approximately 40mA (up or down) from the initial set point. To take full advantage of this adjustment range, it may be prudent to program the laser bias current slightly higher than required for normal operation. However, do not exceed the IBIASOUT absolute maximum rating of 75mA. To maintain APC loop stability, a 0.1F bypass capacitor may be required across the photodiode. If the APC function is not used, disconnect the IBIASFB pin.
Automatic Power Control
The automatic power control (APC) feature allows an optical transmitter to maintain constant power, despite changes in laser efficiency with temperature or age. The APC requires the use of a monitor photodiode.
OUTPUTS VCC
MAX3263
280 280
INPUTS
9
9
Enable Inputs
The MAX3263 provides complementary enable inputs (ENB+, ENB-). The laser is disabled by reducing the reference voltage outputs (VREF1, VREF2). Only one logic state enables laser operation (Figure 3 and Table 1).
2(IOSADJ)
400
2(IOSADJ)
IMOD
INPUT BUFFER
OUTPUT STAGE
Figure 2. MAX3263 Modulation Driver (Simplified)
6 _______________________________________________________________________________________
Single +5V, Fully Integrated, 155Mbps Laser Diode Driver MAX3263
control circuits. For optimum operation, isolate these supplies from each other by independent bypass filtering. GNDA and GNDB have multiple pins. Connect all pins to optimize the MAX3263's high-frequency performance. Ground connections between signal lines (VIN+, VIN-, OUT+, OUT-) improve the quality of the signal path by reducing the impedance of the interconnect. Multiple connections, in general, reduce inductance in the signal path and improve the high-speed signal quality. GND pins should be tied to the ground plane with short runs and multiple vias. Avoid ground loops, since they are a source of high-frequency interference. The MAX3263 data inputs accept PECL input signals, which require 50 termination to (VCC - 2V). Figure 4 shows alternative termination techniques. When a termination voltage is not available, use the Theveninequivalent termination. When interfacing with a non-PECL signal source, use one of the other alternative termination methods shown in Figure 4.
ENB+
DATA OUT (LOAD = 1300nm LASER AT OUT-)
2s/div
Figure 3. Enable/Disable Operation
Table 1. MAX3263 Truth Table
ENB0 0 1 1 ENB+ 0 1 0 1 VREF Off On Off Off
Bias Network Compensation
For best laser transmitter performance, add a filter to the circuit. Most laser packages (TO-46 or DIL) have a significant amount of package inductance (4nH to 20nH), which limits their usable data rate. The MAX3263 OUT pin has about 1pF of capacitance. These two parasitic components can cause high-frequency ringing and aberrations on the output signal. If ringing is present on the transmitter output, try adding a shunt RC filter to the laser cathode. This limits the bandwidth of the transmitter to usable levels and reduces ringing dramatically (Figure 5). L = Laser inductance C = Shunt filter capacitance R = Shunt filter resistance A good starting point is R = 25 and C = L / 4R. Increase C until aberrations are reduced. The IBIASOUT pin has about 4pF of parasitic capacitance. When operating at bias levels over 50mA, the impedance of the bias output may be low enough to decrease the rise time of the transmitter. If this occurs, the impedance of the IBIASOUT pin can be increased by adding a large inductor in series with the pin.
Temperature Considerations
The MAX3263 output currents are programmed by current mirrors. These mirrors each have a 2VBE temperature coefficient. The reference voltage (VREF) is adjusted 2VBE so these changes largely cancel, resulting in output currents that are very stable with respect to temperature (see Typical Operating Characteristics).
__________________Design Procedure
Interfacing Suggestions
Use high-frequency design techniques for the board layout of the MAX3263 laser driver. Adding some damping resistance in series with the laser raises the load impedance and helps reduce power consumption (see Reducing Power Consumption section). Minimize any series inductance to the laser, and place a bypass capacitor as close to the laser's anode as possible. Power connections labeled VCCA are used to supply the laser modulation and laser bias circuits. VCCB connections supply the bias-generator and automatic-power
Reducing Power Consumption
The laser driver typically consumes 40mA of current for internal functions. Typical load currents, such as 12mA of modulation current and 20mA of bias current, bring the total current requirement to 72mA. If this were dissipated entirely in the laser driver, it would generate 360mW of
7
_______________________________________________________________________________________
Single +5V, Fully Integrated, 155Mbps Laser Diode Driver MAX3263
5V PECL SIGNAL SOURCE 5V 82 82 VIN+ a) THEVENIN-EQUIVALENT TERMINATION 120
MAX3263
VIN120
NON-PECL SIGNAL SOURCE 50 50 b) DIFFERENTIAL NON-PECL TERMINATION 50 50 1.8k 5V 680
VIN+
MAX3263
VIN-
NON-PECL SIGNAL SOURCE VIN+ 50 68 c) SINGLE-ENDED NON-PECL TERMINATION 5V 680 VIN1.8k 5V ECL SIGNAL SOURCE 0V 1.3k 1.3k VIN+ d) ECL TERMINATION -2V THIS SYMBOL REPRESENTS A TRANSMISSION LINE WITH CHARACTERISTIC IMPEDANCE Zo = 50. VIN50 -2V 3.6k 50 3.6k 5V 180
MAX3263
MAX3263
Figure 4. Alternative PECL Data-Input Terminations
8 _______________________________________________________________________________________
Single +5V, Fully Integrated, 155Mbps Laser Diode Driver MAX3263
18 OUT+ 0.01F AS CLOSE TO THE LASER ANODE AS POSSIBLE 25 +5V
Average Power Extinction Ratio Temperature Range
PAVE Er Tr
0dBm (1mW) 6dB (Er = 4) 0C to +70C
0.1F
LASER PHOTODIODE
MAX3263
IPIN 10H IBIASOUT FERRITE BEAD OUT-
C
SHUNT RC 18 AS CLOSE TO THE LASER CATHODE AS POSSIBLE
Figure 5. Typical Laser Interface with Bias Compensation
heat. Fortunately, a substantial portion of this power is dissipated across the laser diode. A typical laser diode drops approximately 1.6V when forward biased. This leaves 3.4V at the MAX3263's OUT- terminal. It is safe to reduce the output terminal voltage even further with a series damping resistor. Terminal voltage levels down to 2.2V can be used without degrading the laser driver's high-frequency performance. Power dissipation can be further reduced by adding a series resistor on the laser driver's OUT+ side. Select the series resistor so the OUT+ terminal voltage does not drop below 2.2V with the maximum modulation current.
1) Determine the value of IPINSET: The desired monitor-diode current is (PAVE)(mon) = (1mW)(0.1A/W) = 100A. The R PINSET vs. Monitor Current graph in the Typical Operating Characteristics show that RPINSET should be 18k. 2) Determine RMODSET: The average power is defined as (P1 + P0) / 2, where P1 is the average amplitude of a transmitted "one" and P0 is the average amplitude of a transmitted "zero." The extinction ratio is P1/P0. Combining these equations results in P1 = (2 x PAVE x Er) / (Er + 1) and P0 = (2 x PAVE) / (Er + 1). In this example, P1 = 1.6mW and P0 = 0.4mW. The optical modulation is 1.2mW. The modulation current required to produce this output is 1.2mW / = (1.2mW) / (0.1mA/mW) = 12mA. The Typical Operating Characteristics show that RMODSET = 3.9k yields the desired modulation current. 3) Determine the value of ROSADJ: Using the Allowable R OSADJ Range vs. Modulation Current graph in the Typical Operating Characteristics, a 5.6k resistor is chosen for 12mA of modulation current. The maximum ROSADJ values given in the graph minimize aberrations in the waveform and ensure that the driver stage operates fully limited. 4) Determine the value of RBIASSET: The automatic power control circuit can adjust the bias current 40mA from the initial setpoint. This feature makes the laser driver circuit reasonably insensitive to variations of laser threshold from lot to lot. The bias setting can be determined using one of two methods: A) Set the bias at the laser threshold. B) Set the bias at the midpoint of the highest and lowest expected threshold values. Method A is straightforward. In the second method, it is assumed that the laser threshold will increase with age. The lowest threshold current occurs at 0C when the laser is new. The highest threshold current occurs at +70C at the end of the product's life. Assume the laser is near the end of life when its threshold reaches twotimes its original value. Lowest Bias Current: ITH + ITH = 20mA + (0.35mA/C)(-25C) = 11.25mA Highest Bias Current: 2 x ITH + ITH = 40mA + (0.35mA/C)(+45C) = 55.8mA
9
_____________Applications Information
Programming the MAX3263 Laser Driver
Programming the MAX3263 is best explained by an example. Assume the following laser diode characteristics: Wavelength 1300nm Threshold Current ITH 20mA at +25C(+0.35mA/ C temperature variation) Monitor Responsivity mon 0.1A/W (monitor current / average optical power into the fiber) Modulation Efficiency 0.1mW/mA (worst case) Now assume the communications system has the following requirements:
_______________________________________________________________________________________
Single +5V, Fully Integrated, 155Mbps Laser Diode Driver MAX3263
In this case, set the initial bias value to 34mA (which is the midpoint of the two extremes). The 40mA adjustment range of the MAX3263 maintains the average laser power at either extreme. The Typical Operating Characteristics show that RBIASSET = 1.8k delivers the required bias current. must determine the level of fault tolerance required by their application, recognizing that Maxim products are not designed or authorized for use as components in systems intended for surgical implant into the body, for applications intended to support or sustain life, or for any other application where the failure of a Maxim product could create a situation where personal injury or death may occur.
Laser Safety and IEC 825
Using the MAX3263 laser driver alone does not ensure that a transmitter design is compliant with IEC 825 safety requirements. The entire transmitter circuit and component selections must be considered. Each customer
______________________________________________________________________Package Information
SSOP.EPS
10
______________________________________________________________________________________
Single +5V, Fully Integrated, 155Mbps Laser Diode Driver MAX3263
NOTES
______________________________________________________________________________________
11
Single +5V, Fully Integrated, 155Mbps Laser Diode Driver MAX3263
NOTES
Maxim makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Maxim assume any liability arising out of the application or use of any product or circuit and specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters can and do vary in different applications. All operating parameters, including "typicals" must be validated for each customer application by customer's technical experts. Maxim products are not designed, intended or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Maxim product could create a situation where personal injury of death may occur. 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.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 1998 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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