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MAX3735AETGMAXIMN/a1012avai2.7Gbps, Low-Power SFP Laser Drivers
MAX3735EGGMAXIMN/a850avai2.7Gbps, Low-Power SFP Laser Drivers


MAX3735AETG ,2.7Gbps, Low-Power SFP Laser DriversApplications*Dice are designed to operate from -40°C to +85°C, but areGigabit Ethernet SFP/SFF Tran ..
MAX3735AETG+ ,2.7Gbps, Low-Power SFP Laser DriversELECTRICAL CHARACTERISTICS(V = +2.97V to +3.63V, T = -40°C to +85°C. Typical values at V = +3.3V, I ..
MAX3735AETG+T ,2.7Gbps, Low-Power SFP Laser DriversApplicationsMAX3735AETG+ -40°C to +85°C 24 Thin QFN-EP**Gigabit Ethernet SFP/SFF Transceiver Module ..
MAX3735EGG ,2.7Gbps, Low-Power SFP Laser DriversELECTRICAL CHARACTERISTICS(V = +2.97V to +3.63V, T = -40°C to +85°C. Typical values at V = +3.3V, I ..
MAX3736ETE+ ,3.2Gbps, Low-Power, Compact, SFP Laser DriverApplicationsMAX3736ETE -40°C to +85°C 16 Thin QFN-EP* MAX3736ETE+ -40°C to +85°C 16 Thin QFN-EP* Gi ..
MAX3736ETE+T ,3.2Gbps, Low-Power, Compact, SFP Laser DriverELECTRICAL CHARACTERISTICS(V = +2.97V to +3.63V, T = -40°C to +85°C. Typical values are at V = +3.3 ..
MAX7326ATG+ ,I²C Port Expander with 12 Push-Pull Outputs and Four Inputsfeatures ● 400kHz I C Serial Interface16 I/O ports. The ports are divided into 12 push-pull out-● + ..
MAX7327AATG+ ,I²C Port Expander with 12 Push-Pull Outputs and 4 Open-Drain I/OsApplications● Cell Phones ● NotebooksSelector Guide● SAN/NAS ● Satellite RadioOPEN-● Servers INTERR ..
MAX7327AATG+T ,I²C Port Expander with 12 Push-Pull Outputs and 4 Open-Drain I/Osfeatures 12 push-pull outputs and four configurable open-● +1.71V to +5.5V Operating Voltagedrain I ..
MAX7328AAP+ ,I²C Port Expanders with Eight I/O PortsApplications● RAIDMAX7328AWE -40°C to +125°C 16 Wide SO● ServersMAX7328AAP -40°C to +125°C 20 SSOP● ..
MAX7328AWE+ ,I²C Port Expanders with Eight I/O PortsFeatures2● 100kHz, 5.5V-Tolerant, I C-Compatible Serial The MAX7328/MAX7329 are 2-wire serial-inter ..
MAX732CPA ,+5V/Adjustable Step-Up Current-Mode DC-DC ConvertersELECTRICAL CHARACTERISTICS (Circuit of Figure 2, V+ = 5V, ILOAD = 0mA, TA = TMIN to TMAX, unless ..


MAX3735AETG-MAX3735EGG
2.7Gbps, Low-Power SFP Laser Drivers
General Description
The MAX3735/MAX3735A are +3.3V laser drivers for
SFP/SFF applications from 155Mbps up to 2.7Gbps.
The devices accept differential input data and provide
bias and modulation currents for driving a laser. DC-
coupling to the laser allows for multirate applications
and reduces the number of external components. The
MAX3735/MAX3735A are fully compliant with the SFP
MSA timing and the SFF-8472 transmit diagnostic
requirements.
An automatic power-control (APC) feedback loop is incor-
porated to maintain a constant average optical power
over temperature and lifetime. The wide modulation cur-
rent range of 10mA to 60mA (up to 85mA AC-coupled)
and bias current of 1mA to 100mA make this product
ideal for driving FP/DFB laser diodes in fiber-optic mod-
ules. The resistor range for the laser current settings is
optimized to interface with the DS1858 SFP controller IC.
The MAX3735/MAX3735A provide transmit-disable con-
trol, a single-point latched transmit-failure monitor out-
put, photocurrent monitoring, and bias-current
monitoring to indicate when the APC loop is unable to
maintain the average optical power. The MAX3735A
also features improved multirate operation.
The MAX3735/MAX3735A come in package and die
form, and operate over the extended temperature
range of -40°C to +85°C.
Applications

Gigabit Ethernet SFP/SFF Transceiver Modules
1G/2G Fibre Channel SFP/SFF Transceiver
Modules
Multirate OC3 to OC48-FEC SFP/SFF Transceiver
Modules
Features
SFP Reference Design AvailableFully Compliant with SFP and SFF-8472 MSAsProgrammable Modulation Current from 10mA to
60mA (DC-Coupled)
Programmable Modulation Current from 10mA to
85mA (AC-Coupled)
Programmable Bias Current from 1mA to 100mAEdge Transition Times <51ps27mA (typ) Power-Supply CurrentMultirate 155Mbps to 2.7Gbps OperationAutomatic Average Power ControlOn-Chip Pullup Resistor for TX_DISABLE24-Pin 4mm ×4mm QFN package
MAX3735/MAX3735A
Ordering Information
Typical Application Circuit
Pin Configuration appears at end of data sheet.
MAX3735/MAX3735A
2.7Gbps, Low-Power SFP Laser Drivers
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS

(VCC= +2.97V to +3.63V, TA = -40°C to +85°C. Typical values at VCC= +3.3V, IBIAS= 20mA, IMOD= 30mA, 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
Current into BIAS, OUT+, OUT-......................-20mA to +150mA
Current into MD.....................................................-5mA to +5mA
Voltage at IN+, IN-, TX_DISABLE, TX_FAULT,
SHUTDOWN...........................................-0.5V to (VCC+ 0.5V)
Voltage at BIAS, PC_MON, BC_MON,
MODSET, APCSET.................................-0.5V to (VCC+ 0.5V)
Voltage at OUT+, OUT-.............................+0.5V to (VCC+ 1.5V)
Voltage at APCFILT1, APCFILT2..............................-0.5V to +3V
Continuous Power Dissipation (TA = +85°C )
24-Lead Thin QFN (derate 20.8mW/°C
above +85°C).............................................................1354mW
24-Lead QFN (derate 20.8mW/°C
above +85°C).............................................................1354mW
Operating Ambient Temperature Range (TA)......-40°C to +85°C
Storage Ambient Temperature Range...............-55°C to +150°C
Die Attach Temperature...................................................+400°C
Lead Temperature (soldering, 10s).................................+300°C
MAX3735/MAX3735A
2.7Gbps, Low-Power SFP Laser Drivers
ELECTRICAL CHARACTERISTICS (continued)

(VCC= +2.97V to +3.63V, TA = -40°C to +85°C. Typical values at VCC= +3.3V, IBIAS= 20mA, IMOD= 30mA, TA = +25°C, unless
MAX3735/MAX3735A
2.7Gbps, Low-Power SFP Laser Drivers
ELECTRICAL CHARACTERISTICS (continued)

(VCC= +2.97V to +3.63V, TA = -40°C to +85°C. Typical values at VCC= +3.3V, IBIAS= 20mA, IMOD= 30mA, TA= +25°C, unless
Note 1:
Specifications at -40°C are guaranteed by design and characterization. Dice are tested at TA= +25°C only.
Note 2:
Maximum value is specified at IMOD= 60mA, IBIAS= 100mA.
Note 3:
TX_FAULT is an open-collector output and must be pulled up with a 4.7kΩto 10kΩresistor.
Note 4:
Guaranteed by design and characterization.
Note 5:
VCCturn-on time must be ≤0.8s, DC-coupled interface.
Note 6:
Gain stability is defined by the digital diagnostic document (SFF-8472, rev. 9.0) over temperature and supply variation.
Note 7:
Assuming that the laser diode to photodiode transfer function does not change with temperature.
Note 8:
Accuracy refers to part-to-part variation.
Note 9:
Deterministic jitter is measured using a 223- 1 PRBS or equivalent pattern.
Note 10:
Broadband noise is filtered through the network as shown in Figure 3. One capacitor,
C < 0.47µF, and one 0603 ferrite bead or inductor can be added (optional). This supply voltage filtering reduces the hot-
plugging inrush current. The supply noise must be < 100mVP-Pup to 2MHz.
Note 11:
CAPCvalues chosen as shown in Table 4 (MAX3735A).
MAX3735/MAX3735A
2.7Gbps, Low-Power SFP Laser Drivers

Figure 2. Output Termination for Characterization
Figure 1. Required Input Signal and Output Polarity
Figure 3. Supply Filter
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