MAX3646ETG+ ,155Mbps to 622Mbps SFF/SFP Laser Driver with Extinction Ratio Controlfeatures♦ Automatic Power Control (APC)of automatic power control (APC), modulation compensa-tion, ..
MAX3646ETG+T ,155Mbps to 622Mbps SFF/SFP Laser Driver with Extinction Ratio Controlfeaturesof automatic power control (APC), modulation compensa- ♦ Automatic Power Control (APC)tion, ..
MAX364CPE ,Precision, Quad, SPST Analog SwitchesELECTRICAL CHARACTERISTICS—Dual Supplies(V+ = 15V, V- = -15V, VL = 5V, GND = 0V, V = 2.4V, V = 0.8V ..
MAX364CPE ,Precision, Quad, SPST Analog SwitchesApplicationsMAX365CPE 0°C to +70°C 16 Plastic DIPSample-and-Hold Circuits Communication SystemsMAX3 ..
MAX364CSE ,Precision, Quad, SPST Analog SwitchesMAX364/MAX36519-0181; Rev 0; 9/93Precision, Quad, SPST Analog Switches_______________
MAX364CSE ,Precision, Quad, SPST Analog SwitchesFeaturesThe MAX364/MAX365 are precision, quad, single-pole ' Low On Resistance: < 45Ω Typical (85Ω ..
MAX7301AAX ,4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O ExpanderFeaturesThe MAX7301 compact, serial-interfaced I/O expander♦ High-Speed 26MHz SPI-/QSPI-™/MICROWIRE ..
MAX7301AAX+ ,4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O ExpanderApplications MAX7301 P10 I/O 1035 11CHIP SELECT P11 I/O 11CS● White Goods33 6CLOCK IN SCLK P12I/O 1 ..
MAX7301AAX+ ,4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O ExpanderGeneral Description Beneits and
MAX7301AAX+T ,4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O ExpanderElectrical Characteristics(Typical Operating Circuit, V+ = 2.5V to 5.5V, T = T to T , unless otherw ..
MAX7301AAX-T ,4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O ExpanderElectrical Characteristics(Typical Operating Circuit, V+ = 2.5V to 5.5V, T = T to T , unless otherw ..
MAX7301ATL , 4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O Expander
MAX3646ETG-MAX3646ETG+
155Mbps to 622Mbps SFF/SFP Laser Driver with Extinction Ratio Control
General DescriptionThe MAX3646 is a +3.3V laser driver designed for mul-
tirate transceiver modules with data rates from
155Mbps to 622Mbps. Lasers can be DC-coupled to
the MAX3646 for reduced component count and ease
of multirate operation.
Laser extinction ratio control (ERC) combines the features
of automatic power control (APC), modulation compensa-
tion, and built-in thermal compensation. The APC loop
maintains constant average optical power. Modulation
compensation increases the modulation current in pro-
portion to the bias current. These control loops, com-
bined with thermal compensation, maintain a constant
optical extinction ratio over temperature and lifetime.
The MAX3646 accepts differential data input signals.
The wide 5mA to 60mA (up to 85mA AC-coupled) mod-
ulation current range and up to 100mA bias current
range, make the MAX3646 ideal for driving FP/DFB
lasers in fiber optic modules. External resistors set the
required laser current levels. The MAX3646 provides
transmit disable control (TX_DISABLE), single-point
fault tolerance, bias-current monitoring, and photocur-
rent monitoring. The device also offers a latched failure
output (TX_FAULT) to indicate faults, such as when the
APC loop is no longer able to maintain the average
optical power at the required level. The MAX3646 is
compliant with the SFF-8472 transmitter diagnostic and
SFP MSA timing requirements.
The MAX3646 is offered in a 4mm x 4mm, 24-pin thin
QFN package and operates over the extended -40°C to
+85°C temperature range.
ApplicationsMultirate OC-3 to OC-12 FEC Transceivers
125Mbps Ethernet SFP, GBIC, and 1 x 9
Transceivers
FeaturesSingle +3.3V Power Supply47mA Power-Supply Current85mA Modulation Current100mA Bias CurrentAutomatic Power Control (APC)Modulation CompensationOn-Chip Temperature CompensationSelf-Biased Inputs for AC-CouplingGround-Referenced Current MonitorsLaser Shutdown and Alarm OutputsEnable Control and Laser Safety Feature
MAX3646
155Mbps to 622Mbps SFF/SFP
Laser Driver with Extinction Ratio Control
Ordering Information19-3161; Rev 1; 7/04
Pin Configuration
Typical Application Circuit appears at end of data sheet.+Denotes lead-free package.
MAX3646
155Mbps to 622Mbps SFF/SFP
Laser Driver with Extinction Ratio Control
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VCC= +2.97V to +3.63V, TA= -40°C to +85°C. Typical values are at VCC= +3.3V, IBIAS= 60mA, IMOD= 60mA, TA= +25°C, unless
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.
Supply Voltage VCC...............................................-0.5V to +6.0V
IN+, IN-, TX_DISABLE, TX_FAULT, SHUTDOWN,
BC_MON, PC_MON, APCFILT1, APCFILT2,
MD, TH_TEMP, MODTCOMP, MODBCOMP,
MODSET, and APCSET Voltage.............-0.5V to (VCC+ 0.5V)
OUT+, OUT-, BIAS Current.............................-20mA to +150mA
Continuous Power Dissipation (TA= +85°C)
24-Pin QFN (derate 20.8mW/°C above +85°C).........1805mW
Operating Junction Temperature Range...........-55°C to +150°C
Storage Temperature Range.............................-55°C to +150°C
MAX3646
155Mbps to 622Mbps SFF/SFP
Laser Driver with Extinction Ratio Control
Note 2:Specifications at -40°C are guaranteed by design and characterization.
Note 3:Excluding IBIASand IMOD. Input data is AC-coupled. TX_FAULT open, SHUTDOWN open.
Note 4:Power-supply noise rejection (PSNR) = 20log10(Vnoise (on VCC) / ∆VOUT). VOUTis the voltage across the 15Ωload when IN+
is high.
Note 5:The minimum required voltage at the OUT+ and OUT- pins is +0.75V.
Note 6:Guaranteed by design and characterization.
Note 7:Tested with 00001111 pattern at 622Mbps.
Note 8:DJ includes pulse-width distortion (PWD).
ELECTRICAL CHARACTERISTICS (continued)(VCC= +2.97V to +3.63V, TA= -40°C to +85°C. Typical values are at VCC= +3.3V, IBIAS= 60mA, IMOD= 60mA, TA= +25°C, unless
otherwise noted.) (Notes 1, 2)
MAX3646
155Mbps to 622Mbps SFF/SFP
Laser Driver with Extinction Ratio Control
Typical Operating Characteristics(VCC= +3.3V, CAPC= 0.01µF, IBIAS= 20mA, IMOD= 30mA, TA= +25°C, unless otherwise noted.)
MAX3646
155Mbps to 622Mbps SFF/SFP
Laser Driver with Extinction Ratio Control
RANDOM JITTER vs.
MODULATION CURRENTMAX3646 toc10
IMOD (mA)
RJ (ps
RMS70506020304010
TEMPERATURE COMPENSATION vs.
RTH_TEMP (RMODTCOMP = 500Ω)
MAX3646 toc12
TEMPERATURE (°C)
IMOD
(mA)706050403020100
TEMPERATURE COMPENSATION vs.
RTH_TEMP (RMODTCOMP = 10kΩ)
MAX3646 toc13
TEMPERATURE (°C)
MOD
(mA)706050403020100
HOT PLUG WITH TX_DISABLE LOW
MAX3646 toc14
20ms/div
VCC
FAULT
TX_DISABLE
LASER
OUTPUT
TRANSMITTER ENABLEMAX3646 toc15
10µs/div
VCC
FAULT
TX_DISABLE
LASER
OUTPUT
TRANSMITTER DISABLEMAX37646 toc16
20ns/div
VCC
FAULT
TX_DISABLE
LASER
OUTPUT
RESPONSE TO FAULTMAX3646 toc17
400ns/div
VPC_MON
FAULT
TX_DISABLE
LASER
OUTPUT
FAULT RECOVERY TIMEMAX3646 toc18
40ms/div
VPC_MON
FAULT
TX_DISABLE
LASER
OUTPUT
Typical Operating Characteristics (continued)(VCC= +3.3V, CAPC= 0.01µF, IBIAS= 20mA, IMOD= 30mA, TA= +25°C, unless otherwise noted.)
