Features: · Single +3.3V or +5V Power Supply
· 62mA Supply Current at +3.3V
· Programmable Modulation Current from 5mA to 60mA
· Programmable Bias Current from 1mA to 100mA
· Rise/Fall Time < 90ps
· Automatic Average Power Control with Failure Monitor
· Complies with ANSI, ITU, and Bellcore SDH/SONET Specifications
· Enable ControlApplication·SONET/SDH Transmission Systems
·Add/Drop Multiplexers
·Digital Cross-Connects
·Section Regenerators
·2.5Gbps Optical TransmittersSpecificationsSupply Voltage, VCC............................................ -0.5V to +7.0V
Current into BIAS ...........................................-20mA to +150mA
Current into OUT+, OUT- ................................-20mA to +100mA
Current into MD.....................................................-5mA to +5mA
Voltage at DATA+, DATA-, CLK+, CLK-,
ENABLE, LATCH, FAIL, SLWSTRT..................-0.5V to (VCC + 0.5V)
Voltage at APCFILT, CAPC, MODSET,
BIASMAX, APCSET ................................................-0.5V to +3.0V
Voltage at OUT+, OUT-..............................+1.5V to (VCC + 1.5V)
Voltage at BIAS .........................................+1.0V to (VCC + 0.5V)
Current into FAIL ...............................................-10mA to +30mA
Continuous Power Dissipation (TA = +85°C)
TQFP (derate 20.8mW/°C above +85°C)......................1354mW
Storage Temperature Range ...........................-65°C to +165°C
Operating Junction Temperature Range...........-55°C to +150°C
Processing Temperature (die) .........................................+400°C
Lead Temperature (soldering, 10sec) .............................+300°C
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.
DescriptionThe MAX3867 is a complete, single +3.3V laser driver for SDH/SONET applications up to 2.5Gbps. The device accepts differential PECL data and clock inputs and provides bias and modulation currents for driving a laser. The synchronizing input latch can be bypassed if a clock signal is not available.
An automatic power control (APC) feedback loop of MAX3867 is incorporated to maintain a constant average optical power over temperature and lifetime. The wide modulation current range of 5mA to 60mA and bias current of 1mA to 100mA are easy to program, making this product ideal for use in various SDH/SONET applications.
The MAX3867 also provides enable control, a programmable slow-start circuit to set the laser turn-on delay, and a failure-monitor output to indicate when the APC loop is unable to maintain the average optical power. The MAX3867 is available in a small 48-pin TQFP package as well as dice.
MAX3867 Data Sheet
