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MAX3668 Datasheet(PDF) 1 Page - Maxim Integrated Products

Part No. MAX3668
Description  3.3V, 622Mbps SDH/SONET Laser Driver with Automatic Power Control
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
Logo MAXIM - Maxim Integrated Products

MAX3668 Datasheet(HTML) 1 Page - Maxim Integrated Products

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General Description
The MAX3668 is a complete, +3.3V laser driver with
automatic power control (APC) circuitry for SDH/SONET
applications up to 622Mbps. It accepts differential
PECL inputs, provides bias and modulation currents,
and operates over a temperature range of -40°C to
+85°C.
An APC feedback loop is incorporated to maintain a
constant average optical power over temperature and
lifetime. The wide modulation current range of 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.
The MAX3668 also provides enable control and a failure-
monitor output to indicate when the APC loop is unable
to maintain the average optical power. The MAX3668 is
available in a 5mm 32-pin TQFP package as well as in
dice.
Applications
622Mbps SDH/SONET Access Nodes
Laser Driver Transmitters
Section Regenerators
Features
o Single +3.3V or +5.0V Operation
o 38mA Supply Current at +3.3V
o Programmable Modulation Current from
5mA to 75mA
o Programmable Bias Current from 1mA to 80mA
o Rise/Fall Time <200ps
o Automatic Average Power Control with Failure
Monitor
o Complies with ANSI, ITU, and Bellcore
SONET/SDH Specifications
o Enable Control
+3.3V, 622Mbps SDH/SONET
Laser Driver with Automatic Power Control
________________________________________________________________ Maxim Integrated Products
1
DATA+
MD
BIAS
OUT+
0.1
µF
LASER
OUT-
CMD
1000pF
RFILT
20
CFILT
5pF
CD
1.0
µF
R+
20
R-
6.3
RD
5
FERRITE
BEAD
VCC
DATA-
PECL
+3.3V
+3.3V
82
82
130
130
4:1
SERIALIZER
WITH
CLOCK GEN
MAX3693
MAX3668
Typical Operating Circuit
19-4799; Rev 2; 2/00
PART
MAX3668EHJ
-40°C to +85°C
TEMP. RANGE
PIN-PACKAGE
32 TQFP (5mm x 5mm)
Ordering Information
Pin Configuration appears at end of data sheet.
MAX3668E/D
(see Note)
Dice*
Note: Dice are designed to operate over a -40°C to +140°C
junction temperature (Tj) range, but are tested and guaranteed
at TA = +25°C.
*Contact factory for availability.
Covered by U.S. Patent numbers 5,802,089 and 5,883,910
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.


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