MAX3663ETG ,+3.3 V, 622 Mbps SDH/SONET laser driver with current monitor and APCApplicationsTypical Application Circuit+3.3V +3.3VLASERVCCR-124Ω124ΩR+6.3Ω20ΩDATA+ROUT- D5ΩMAX3693P ..
MAX3664E/D ,622Mbps, Ultra-Low-Power, 3.3V Transimpedance Preamplifier for SDH/SONETapplications consumes only' 55nA Input-Referred NoiseRMS85mW. Operating from a single +3.3V supply, ..
MAX3664ESA ,622Mbps / Ultra-Low-Power / 3.3V Transimpedance Preamplifier for SDH/SONETapplications consumes only' 55nA Input-Referred NoiseRMS85mW. Operating from a single +3.3V supply, ..
MAX3664EUA ,622Mbps, ultra-low-power, 3.3V transimpedance preamplifier for SDH/SONET.applications consumes only' 55nA Input-Referred NoiseRMS85mW. Operating from a single +3.3V supply, ..
MAX3667E/D ,+3.3V, 622Mbps SDH/SONET Laser Driver with Automatic Power ControlApplications622Mbps SDH/SONET Access NodesPin Configuration appears at end of data sheet.Laser Driv ..
MAX3667ECJ ,+3.3V / 622Mbps SDH/SONET Laser Driver with Automatic Power ControlApplications622Mbps SDH/SONET Access NodesPin Configuration appears at end of data sheet.Laser Driv ..
MAX7311AAG ,2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion ProtectionFeatures2The MAX7311 2-wire-interfaced expander provides 16-bit♦ 400kbps I C-Compatible Serial Inte ..
MAX7311ATG , 2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion Protection
MAX7311ATG+ ,2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion Protectionapplications requiring I/Os without pullup resistors,PKGrefer to the MAX7312 data sheet.PART TEMP R ..
MAX7311AUG ,2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion ProtectionApplicationsMAX7311AWG -40°C to +125°C 24 Wide SO —ServersMAX7311AAG -40°C to +125°C 24 SSOP —RAID ..
MAX7311AUG+ ,2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion ProtectionELECTRICAL CHARACTERISTICS+ +(V = 2V to 5.5V, T = -40°C to +125°C, unless otherwise noted. Typical ..
MAX7311AUG+T ,2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion Protectionapplications. The MAX7311 consists of inputport registers, output port registers, polarity inversio ..
MAX3663ETG
+3.3 V, 622 Mbps SDH/SONET laser driver with current monitor and APC
General DescriptionThe MAX3663 is a complete, +3.3V laser driver with auto-
matic power-control (APC) circuitry for SDH/SONET appli-
cations up to 622Mbps. It accepts differential PECL
inputs, provides bias and modulation currents, and oper-
ates over a -40°C to +85°C temperature range.
An APC feedback loop is incorporated to maintain a
constant average optical power over temperature and
lifetime. The wide modulation current range from 5mA to
75mA and bias current of 1mA to 80mA are easy to
program, making this product ideal for use in various
SDH/SONET applications. Two pins are provided to
monitor the current levels in the laser: BIASMON with
current proportional to laser bias current, and MODMON
with current proportional to laser modulation.
The MAX3663 also provides enable control and a failure-
monitor output to indicate when the APC loop is unable
to maintain the average optical power. The MAX3663
is available in a compact 4mm x 4mm 24-pin thin QFN
package.
Applications622Mbps SDH/SONET Access Nodes
Laser Driver Transmitters
Section Regenerators
FTTH/FTTC Applications
Features+3.3V or +5.0V Single-Supply Operation40mA Supply Current at +3.3VProgrammable Bias Current from 1mA to 80mAProgrammable Modulation Current from
5mA to 75mABias Current and Modulation Current Monitors200ps Rise/Fall TimeAutomatic Average Power Control with Failure
MonitorComplies with ANSI, ITU, and Bellcore
SONET/SDH SpecificationsEnable Control
MAX3663
+3.3V, 622Mbps SDH/SONET
Laser Driver with Current Monitors and APC
Typical Application Circuit
Ordering Information
Pin Configuration appears at end of data sheet.
MAX3663
+3.3V, 622Mbps SDH/SONET
Laser Driver with Current Monitors and APC
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS(VCC= +3.14V to +5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VCC= +3.3V, TA= +25°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.
Supply 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-, ENABLE, FAIL,BIASMON, MODMON..................-0.5V to (VCC+ 0.5V)
Voltage at OUT+, OUT-.............................+1.5V to (VCC + 1.5V)
Voltage at MODSET, APCSET, BIASMAX,
CAPC...............................................................-0.5V to +3.0V
Voltage at BIAS.........................................+1.0V to (VCC + 0.5V)
Continuous Power Dissipation (TA= +85°C)
24-Lead Thin QFN
(derate 20.8mW/°C above +85°C)........................1354mW
Operating Junction Temperature Range...........-55°C to +150°C
Processing Temperature (Die).........................................+400°C
Storage Temperature Range............................-65°C to +165°C
Lead Temperature (soldering, 10s).................................+300°C
MAX3663
+3.3V, 622Mbps SDH/SONET
Laser Driver with Current Monitors and APC
AC ELECTRICAL CHARACTERISTICS(VCC= +3.14V to +5.5V, load as shown in Figure 2, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VCC= +3.3V,= +25°C.) (Note 6)
Note 1:Tested with RMODSET= 5.11kΩ(IMOD≈38mA), RBIASMAX= 4.56kΩ(IBIAS≈52mA), excluding IBIASand IMOD.
Note 2:Both the bias and modulation currents are disabled if any of the current set pins are shorted to ground.
Note 3:Guaranteed by design and characterization. This assumes that the laser to monitor diode transfer function does not change
with temperature.
Note 4:See the Typical Operating Characteristicsfor worst-case distributions.
Note 5:ACcharacteristics are guaranteed by design and characterization.
Note 6:Total IMODout of OUT+. See the Design Procedure section for information regarding current delivered to the laser.
Note 7:Input signal is a 622Mbps, 213 - 1 PRBS with eighty inserted 0s.
Note 8:Input signal is a 622Mbps, 11110000 pattern.
Note 9:PWD = (wider pulse - narrower pulse) / 2.
MAX3663
+3.3V, 622Mbps SDH/SONET
Laser Driver with Current Monitors and APC
Typical Operating Characteristics (VCC= +3.3V, TA= +25°C, unless otherwise noted.)
MAX3663
+3.3V, 622Mbps SDH/SONET
Laser Driver with Current Monitors and APC
DISTRIBUTION OF MODULATION CURRENT
STABILITY (WORST CASE)MAX3663 toc10
MODULATION CURRENT STABILITY (ppm/°C)
UNITS (%)
DISTRIBUTION OF MONITOR DIODE CURRENT
STABILITY (WORST CASE)
MAX3663 toc11
MONITOR DIODE CURRENT STABILITY (ppm/°C)
PERCENT OF UNITS (%)
Typical Operating Characteristics (continued)
(VCC= +3.3V, TA= +25°C, unless otherwise noted.)
MAX3663
+3.3V, 622Mbps SDH/SONET
Laser Driver with Current Monitors and APC
MAX3663
+3.3V, 622Mbps SDH/SONET
Laser Driver with Current Monitors and APC
Detailed DescriptionThe MAX3663 laser driver consists of three main parts:
a high-speed modulation driver, a laser-biasing block
with automatic power control (APC), and bias current
and modulation current monitors. The circuit is opti-
mized for low-voltage (+3.3V) operation.
The output stage is composed of a high-speed differential
pair and a programmable modulation current source.
Since the modulation output drives a maximum current
of 75mA into the laser with a 230ps edge speed, large
transient voltage spikes can be generated due to the
parasitic inductance. These transients and the laser for-
ward voltage leave insufficient headroom for the proper
operation of the laser driver if the modulation output is
DC-coupled to the laser diode. To solve this problem,
the MAX3663’s modulation output is designed to be
AC-coupled to the cathode of a laser diode. A simpli-
fied functional diagram is shown in Figure 3.
The MAX3663’s modulation output is optimized for driv-
ing a 20Ω 10Ωload; the minimum required voltage at
OUT+ is 2.0V. Modulation current swings of 75mA are
possible. To interface with the laser diode, a damping
resistor (RD) is required for impedance matching. An
RC shunt network can be used to compensate for the
laser-diode parasitic inductance, thereby improving the
optical output aberrations and duty-cycle distortion.
At a 622Mbps data rate, any capacitive load at the cath-
ode of a laser diode degrades the optical output perfor-
mance. Since the BIAS output is directly connected to the
laser cathode, minimize the parasitic capacitance associ-
ated with this pin by using an inductor to isolate the BIAS
pin from the laser diode.
