The SL6023 is a high performance dual four-channel laser driver that provides controlled current to two grounded laser diodes. 

The OUTSEL pin selects LD1 or LD2 pin active to drive either CD or DVD laser diode.

The level of the output current is determined by the  voltage setting onto RSET, W1SET, W2SET, and W3SET.

The channel enable pin at RDIS, or the pin pairs of W1DIS-W1DISN, W2DIS-W2DISN, and W3DIS-W3DISN determine current waveform timing.

The  output write current pulses are enabled when a low is applied to RDIS or low-high to  these pin pairs  with switching speed less than 1 ns rise/fall time.

Two on-chip oscillators can provide  up to 500MHz modulation to the output current. Pin OSCE is  held high-low to  turn  on the oscillators. Each oscillator’s amplitude and frequency is set by an external resistor connected to ground from AADJ1 or AADJ2. And frequency is set from FADJ1 or FADJ2.

The total output current is the sum of current from the four charnels and the oscillator.

 The write channels 1, 2, 3, and 4 enables are LVDS or TTL interface selected by INS pin. LD1or LD2 is enabled by when OUTSEL is high or low respectively. 

There is a whole chip enable pin ENBL needed to be high. And complete LD shut-off is achieved by holding ENBL low.

The SL6023 is available in 32-pin 5x5mm pad-up QFN package.