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MAX3766 fiches techniques PDF

Maxim Integrated - 622Mbps LAN/WAN Laser Driver

Numéro de référence MAX3766
Description 622Mbps LAN/WAN Laser Driver
Fabricant Maxim Integrated 
Logo Maxim Integrated 





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MAX3766 fiche technique
19-1249; Rev 1; 11/04
EVAALVUAAILTAIOBNLEKIT 622Mbps LAN/WAN Laser Driver with
Automatic Power Control and Safety Shutdown
________________General Description
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.
________________________Applications
622Mbps ATM Transmitters
1.25Gbps Fiber Optic LAN Transmitters
1.25Gbps Ethernet Transmitters
Typical Application Circuits appear at end of data sheet.
____________________________Features
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
PART
MAX3766EEP
MAX3766EEP+
MAX3766E/D
Ordering Information
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
20 QSOP
20 QSOP
Dice*
*Dice are designed to operate over this range, but are tested and
guaranteed at TA = +25°C only. Contact factory for availability.
+Denotes lead-free package.
Pin Configuration
TOP VIEW
BIASMAX 1
TC 2
REF2 3
MOD 4
GND 5
IN- 6
IN+ 7
GND 8
VCC 9
ENABLE 10
MAX3766
20 REF1
19 POWERSET
18 MD
17 GNDOUT
16 BIAS
15 OUT+
14 OUT-
13 VCCOUT
12 FAIL
11 SAFETY
QSOP
________________________________________________________________ Maxim Integrated Products 1
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.

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