MAX24001

The MAX24001 is a complete burst-mode laser driver transmitter and limiting amplifier receiver for use within fiber optic modules for FTTx applications. A fully compliant GPON/GEPON module with digital diagnostics can be realized when used with a 2KB EEPROM and suitable optics. Alternatively, a microcontroller can be used in conjunction with the MAX24001; however, this is not a necessity in order to achieve SFF-8472 compliance.

The 2.5Gbps limiting receive path features programmable output swing control, rate selection, and OMA-based loss-of-signal detection. Functions are also provided which facilitate the implementation of APD biasing without the need for an external DC-DC converter.

The burst-mode laser driver has temperature compensated modulation control using a lookup table. Closed-loop control of laser power incorporates tracking error compensation and has multiple options for rapidly settling the laser power thus enabling fast registration and shutdown on the network. Diagnostics are enhanced with the inclusion of programmable transmit signal detection during bursts, and rogue ONU detection between bursts. This is linked to a laser safety system which allows the modulation and bias currents to be shut off in response to a range of different fault conditions detected on-chip.

The transmit and receive systems are independently powered and can respond separately to the SLEEP pin. The MAX24001 is highly configurable from either EEPROM or low-cost MCU using a two-wire interface.

Applications

• GPON, GEPON, Gigabit Ethernet