♦Functional Description The F0539951Q is a high performance GaAs laser diode driver IC applicable in an optical transmitter circuit up to 10.0 Gb/s NRZ data rate (especially suitable for STM-64 / OC-192). The F0539951Q specifies the rise time and the fall time of 35 ps (20 % - 80 %, 25Ω load) typically. It features the single 3.3V supply operation, the modulation current between 10 mAp-p and 65 mAp-p, and the bias current between 3 mA and 100 mA.