SY88702 Datasheet | Micrel Semiconductor

Micrel 5V 622Mbps LASER DIODE DRIVER WITH OUTPUT ENABLE Features s s s s s s Up to 622Mbps operation Modulation current to 25m A PECL output enable Differential PECL inputs Single 5V power supply Available in a tiny 10-pin (3mm) MSOP DESCRIPTION The SY88702 is a high-speed current switch for driving a semiconductor laser diode in optical transmission applications. The modulation current (IOUT) is controlled by the current (IRSET) through the external resistor RSET. The output OUT is HIGH and no current flows through OUT when output enable is HIGH. The device incorporates plementary open collector outputs with 25m A maximum current driving capability. The external resistor R EXT must be placed between /OUT and VCC to dissipate the worst case power. RSER is remended to pensate for laser diode matching issues. The SY88702 utilizes the high performance bipolar ASSET™ technology. APPLICATIONS s 622Mbps SONET .. FUNCTIONAL BLOCK DIAGRAM VCC REXT /OUT OUT RSER DIN /DIN Internal Logic /EN 40X VCC GND VEE VREF RSET IMOD to Laser Diode RSET ASSET is a trademark of Micrel, Inc. Rev.: B Amendment: /0 Issue Date: August 2003 Micrel PACKAGE/ORDERING INFORMATION Ordering Information /EN 1 DIN 2 /DIN 3 VREF 4 RSET 5 10 VCC 9 OUT 8 /OUT 7 GND 6 GND Part Number SY88702KC SY88702KCTR- SY88702KI SY88702KITR- - Tape and Reel Package Type K10-1 K10-1 K10-1 K10-1 Operating Range mercial mercial Industrial Industrial Package Marking 702 702 702 702 10-Pin MSOP (K10-1) PIN DESCRIPTION Pin Number 1 2, 3 4 5 6, 7 9, 8 10 Pin Name /EN DIN, /DIN VREF RSET GND OUT, /OUT VCC Pin Function 100k PECL patible input with 75kΩ pull-down resistor. Modulation current goes to zero when deasserted high. Differential 100k PECL patible input with 75kΩ pull-down resistors. Voltage reference for use with RSET. An external resistor connected from here to VREF sets the reference current for IOUT. Device ground. Differential...