What this laser driver does on the bench
The Maxim Integrated MAX3736ETE+T is a single-channel laser diode driver built for fiber-optic transceiver modules. It handles data rates up to 3.2 Gbps, with a bias current of 100 mA and modulation current of 85 mA — enough to drive common SFP and GBIC laser diodes. The supply range runs from 2.97 V to 3.63 V, and the part is specified across -40°C to 85°C, so it fits both central-office and outdoor-cabinet temperature profiles. Housed in a 16-TQFN (3x3 mm) with an exposed pad, it's a surface-mount part that needs a solid thermal via pattern under the pad to pull heat out of the laser output stage.
3.2 Gbps data rate — what it means for the link budget
At 3.2 Gbps the driver supports Fibre Channel and Gigabit Ethernet rates with margin. The 85 mA modulation current is the peak-to-peak swing into the laser;.
Lifecycle and sourcing posture
The MAX3736ETE+T carries an Active lifecycle status and is ROHS3 compliant. No end-of-life notice or last-time-buy window has been announced. This part is sourced and quoted to order through independent distribution; submit an RFQ to confirm availability and pricing.
Package and footprint notes
The 16-TQFN (3x3 mm) package has an exposed pad on the bottom — that's the main thermal path. The datasheet recommends a 2x2 array of thermal vias under the pad, tied to a ground plane. The part is supplied in Tape & Reel (TR) or Cut Tape (CT) options, so it's pick-and-place ready for reflow assembly.