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Analog Devices MAX3949ETE+ — Analog & Data Acquisition

MAX3949ETE+ Laser Diode Driver, 11.3Gbps, 16-TQFN

MPNMAX3949ETE+
End of Life

Maxim Integrated MAX3949ETE+, Laser Diode Driver, 11.3 Gbps, 105 mA bias, 85 mA modulation, 2.95V–3.63V supply, -40°C to 95°C, 16-WFQFN Exposed Pad (16-TQFN 3x3), Tube, Surface Mount, ROHS3 compliant, Active.

$7.14Ref. price · indicative, final on quote
Packaging16-WFQFN Exposed Pad
RoHSROHS3 Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

MAX3949ETE+ specifications
ParameterValue
TypeLaser Diode Driver
MountingSurface Mount
Voltage2.95V ~ 3.63V
Current - bias105 mA
Current - supply55 mA
Current - modulation85mA
Operating temperature-40°C ~ 95°C
PackageTube
Data rate11.3Gbps
Case16-WFQFN Exposed Pad
Channels1

Product details

11.3 Gbps laser diode driver for SFP+ optical modules

The Maxim Integrated MAX3949ETE+ is a single-channel laser diode driver rated for 11.3 Gbps operation, designed to drive a differential-modulated laser in 10G SFP+ optical transceivers. It delivers a bias current up to 105 mA and a modulation current up to 85 mA, with a supply range of 2.95 V to 3.63 V. The part is specified over -40°C to 95°C, suiting it for industrial-temperature telecom and datacom equipment where the optics cage sees ambient heat from adjacent line cards.

Package and rework — 16-TQFN with exposed pad

It is an MSL 1 part out of the bag, so no bake is needed before reflow if the sealed pouch is intact.

No immediate obsolescence risk, but as with any high-speed analog IC, it is worth checking the manufacturer's PCN page annually for die shrinks or assembly site changes that could affect RF performance.

The 105 mA bias current ceiling and 85 mA modulation current define the laser diode types this driver can handle. For a typical 10Gbps DFB laser, the MAX3949ETE+ has headroom.

Frequently asked questions

What is the data rate of MAX3949ETE+?

The MAX3949ETE+ is rated for 11.3 Gbps operation, covering 10G SFP+ and 10G Fibre Channel line rates with margin.

What is the difference between MAX3949ETE+ and MAX3949ETE?

The MAX3949ETE+ and MAX3949ETE are the same die and package; the '+' suffix indicates ROHS3 compliance (lead-free). The non-plus variant is not ROHS3 compliant. Functionally and pin-compatibly identical.

Is MAX3949ETE+ compatible with 10Gbps SFP+ modules?

Yes, the 11.3 Gbps data rate covers 10G SFP+ LRM, SR, and LR optical modules. The bias and modulation currents are well within the typical drive requirements for 10Gbps DFB and VCSEL lasers used in SFP+ form factors.

What is the typical application of MAX3949ETE+?

The MAX3949ETE+ is a laser diode driver for 10G SFP+ optical transceivers, 10G Fibre Channel modules, and other 11.3 Gbps optical links in telecom and datacom equipment. It operates over -40°C to 95°C, suiting it for outdoor and industrial-temperature environments.