The MAX3656 is a burst-mode laser driver from MAXIM that operates at data rates from 155Mbps up to 2.5Gbps. It supports either PECL or CML data inputs and provides bias and modulation current for the laser diode.
The MAX3656 laser driver provides burst‑mode operation from 155 Mbps up to 2.5 Gbps. It accepts PECL or CML data inputs and delivers programmable bias (1 mA‑70 mA) and modulation (10 mA‑85 mA) currents to the laser diode. The device features a digital automatic power‑control (APC) loop that maintains constant average optical power over temperature and lifetime.
The driver is supplied from a single +3 V rail (3.0 V‑3.6 V) in a 24‑pin thin QFN package (4 mm × 4 mm). Key performance figures include burst‑enable delay <2 ns, burst‑on‑time as short as 576 ns with no upper limit, and a typical supply‑current of 40 mA. The MAX3656 is intended for FTTH/FTTB PON transmitters and other high‑speed optical communication applications.
| Data Rate | 155 Mbps to 2.5 Gbps |
|---|---|
| Supply Voltage (Vcc) | 3.0 V to 3.6 V |
| Bias Current Range | 1 mA to 70 mA |
| Modulation Current Range | 10 mA to 85 mA |
| Typical Power‑Supply Current | 40 mA |
| Burst Enable Delay | < 2 ns |
| Package | 24‑pin thin QFN, 4 mm × 4 mm |
The MAX3656 supports data rates from 155 Mbps up to 2.5 Gbps.
The bias current is programmable from 1 mA to 70 mA via an external resistor connected to the BIASMAX pin.
The burst‑enable delay is less than 2 ns.
It operates from a single‑supply voltage of 3.0 V to 3.6 V.