MAX3766 Maxim, MAX3766 Datasheet
MAX3766
Manufacturer Part Number
MAX3766
Description
622Mbps LAN/WAN Laser Driver with Automatic Power Control and Safety Shutdown
Manufacturer
Maxim
Datasheet
1.MAX3766.pdf
(20 pages)
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The MAX3766 is a complete, easy-to-program laser
driver for fiber optic LAN transmitters, optimized for
operation at 622Mbps. It includes a laser modulator,
automatic power control (APC), and a failure indicator
with latched shutdown.
Laser modulation current can be programmed up to
60mA at 622Mbps. A programmable modulation tem-
perature coefficient can be used to keep the transmit-
ted extinction ratio nearly constant over a wide
temperature range. The modulator operates at data
rates up to 1.25Gbps at reduced modulation current.
APC circuitry uses feedback from the laser’s monitor
photodiode to adjust the laser bias current, producing
constant output power regardless of laser temperature
or age. The MAX3766 supports laser bias currents up
to 80mA.
The MAX3766 provides extensive laser safety features,
including a failure indicator with latched shutdown and
a smooth start-up bias generator. These features help
ensure that the transmitter output does not reach haz-
ardous levels. The MAX3766 is available in a compact
20-pin QSOP and dice.
Typical Application Circuits appear at end of data sheet.
________________General Description
________________________Applications
19-1249; Rev 0b; 10/97
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
Automatic Power Control and Safety Shutdown
622Mbps ATM Transmitters
1.25Gbps Fiber Optic LAN Transmitters
1.25Gbps Ethernet Transmitters
________________________________________________________________ Maxim Integrated Products
622Mbps LAN/WAN Laser Driver with
*
____________________________Features
guaranteed at T
Dice are designed to operate over this range, but are tested and
MAX3766EEP
MAX3766E/D
60mA Modulation Current
80mA Bias Current
200ps Edge Speed
Modulation-Current Temperature Compensation
Automatic Power Control
Laser-Fail Indicator with Latched Shutdown
Smooth Laser Start-Up
TOP VIEW
PART
BIASMAX
ENABLE
A
REF2
MOD
GND
GND
V
IN+
IN-
= +25°C only. Contact factory for availability.
TC
CC
10
1
2
3
4
5
6
7
8
9
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE
Ordering Information
MAX3766
QSOP
Pin Configuration
20
19
18
17
16
15
14
13
12
11
20 QSOP
Dice*
PIN-PACKAGE
REF1
MD
GNDOUT
BIAS
OUT+
OUT-
V
FAIL
SAFETY
POWERSET
CCOUT
1
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