MAX3646ETG+T by Analog Devices

155Mbps to 622Mbps SFF/SFP Laser Driver with Extinction Ratio Control

Status: Active
Series: MAX3646
RoHS: Unknown
View Datasheet Manufacturer Site View Pricing & Stock

The MAX3646 is a +3.3V laser driver designed for multirate transceiver modules with data rates from 155Mbps to 622Mbps. Lasers can be DC-coupled to the MAX3646 for reduced component count and ease of multirate operation. Laser extinction ratio control (ERC) combines the features of automatic power control (APC), modulation compensation, and built-in thermal compensation. The APC loop maintains constant average optical power. Modulation compensation increases the modulation current in proportion to the bias current. These control loops, combined with thermal compensation, maintain a constant optical extinction ratio over temperature and lifetime. The MAX3646 accepts differential data input signals. The wide 5mA to 60mA (up to 85mA AC-coupled) modulation current range and up to 100mA bias current range, make the MAX3646 ideal for driving FP/DFB lasers in fiber optic modules. External resistors set the required laser current levels. The MAX3646 provides transmit disable control (TX_DISABLE), single-point fault tolerance, bias-current monitoring, and photocurrent monitoring. The device also offers a latched failure output (TX_FAULT) to indicate faults, such as when the APC loop is no longer able to maintain the average optical power at the required level. The MAX3646 is compliant with the SFF-8472 transmitter diagnostic and SFP MSA timing requirements. The MAX3646 is offered in a 4mm x 4mm, 24-pin thin QFN package and operates over the extended -40°C to +85°C temperature range.

Prices starting from US$3.55


Distributor Starting From Stock
Logo for Newark Electronics Newark Electronics US$3.55
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Logo for element14 element14 US$3.82
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Features

Single +3.3V Power Supply
47mA Power-Supply Current
85mA Modulation Current
100mA Bias Current
Automatic Power Control (APC)
Modulation Compensation
On-Chip Temperature Compensation
Self-Biased Inputs for AC-Coupling
Ground-Referenced Current Monitors
Laser Shutdown and Alarm Outputs
Enable Control and Laser Safety Feature

Specifications

Target Oper. Range (Gbps) <1
Data Rate (Mbps) (min) 155
Data Rate (Mbps) (max) 622
VSUPPLY (V) 3.3
ICC (mA) (typ) 47
I/O Type CML
IMOD (mA) (max) 85
IBIAS (mA) (max) 100
Package/Pins TQFN/24
BudgetaryPrice (See Notes) 2.85


MAX3646ETG+T Semiconductors - ICs by Analog Devices

LASER DRIVE SFF/SFP TQFN-24

Status: Unknown
Series: -
RoHS: Unknown
View Datasheet Manufacturer Site View Pricing & Stock

Specifications

Laser Driver Type SFP / SFF Optical Modules
Driver Case Style TQFN
No. of Pins 24Pins
Supply Voltage Min -
Supply Voltage Max 3.3V
Product Range -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

Laser Drive, Sff/Sfp, Tqfn-24 | Newark Electronics
LASER DRIVE, SFF/SFP, TQFN-24 | Farnell

Frequently Asked Questions

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Is the MAX3646ETG+T RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for MAX3646ETG+T have stock available?

Authorised distributors including Newark Electronics, element14 and Farnell have stock available or on a lead time for MAX3646ETG+T .

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