SY88822VKG Microchip

SY88822V Micrel, Inc. 5V/3.3V 155Mbps LASER DIODE SY88822V DRIVER WITH OUTPUT ENABLE FEATURES DESCRIPTION Single 3.3V or 5V power supply The SY88822V is a high speed current switch for driving a semiconductor laser diode in optical transmission Up to 155Mbps operation applications. The modulation current (I ) is controlled by OUT Modulation current to 30mA the current (I ) through the external resistor R . The RSET SET PECL output enable output OUT is HIGH and no current flows through OUT Differential PECL inputs when output enable is HIGH. Available in a tiny 10-pin (3mm) MSOP The device incorporates complementary open collector outputs with a 30mA maximum current driving capability. The external resistor R must be placed between /OUT EXT and V to dissipate the worst case power. R is CC SER recommended to compensate for laser diode matching issues. Pin 9 and pin 10 should be connected to achieve APPLICATIONS better performance. The SY88822V utilizes the high performance bipolar 155Mbps SONET ASSET technology. FUNCTIONAL BLOCK DIAGRAM V CC R EXT /OUT OUT R SER DIN to Laser Diode /DIN Internal I MOD Logic /EN 40X V CC GND GND V R REF SET R SET ASSET is a trademark of Micrel, Inc. Rev.: B Amendment: /0 M9999-072505 Issue Date: July 2005 1 hbwhelp micrel.com or (408) 955-1690SY88822V Micrel, Inc. PACKAGE/ORDERING INFORMATION Ordering Information Package Operating Package Lead /EN 1 10 OUT Part Number Type Range Marking Finish DIN 2 9 OUT SY88822VKC K10-1 Commercial 822V Sn-Pb /DIN 3 8 /OUT (1) SY88822VKCTR K10-1 Commercial 822V Sn-Pb VREF 4 7 GND SY88822VKG K10-1 Industrial 822V with Pb-Free RSET 5 6 VCC Pb-Free bar-line indicator NiPdAu (1) SY88822VKGTR K10-1 Industrial 822V with Pb-Free 10-Pin MSOP Pb-Free bar-line indicator NiPdAu (K10-1) Note: 1. Tape and Reel. PIN DESCRIPTION Pin Number Pin Name Pin Function 1 /EN 100k PECL compatible input w/ 75k pulldown resistor. Modulation current goes to zero when deasserted high. 2, 3 DIN, /DIN Differential 100k PECL compatible input w/ 75k pulldown resistors. 4 VREF Voltage reference for use with R . SET 5 RSET An external resistor from here to V sets the reference current for I . REF OUT 6 VCC Positive power supply. 7 GND Device ground. 8, 9, 10 /OUT, OUT Differential open collector current outputs. (1) TRUTH TABLE (Note 2) D /D /EN OUT /OUT LH LH L H LLL H XX H H L Notes: 1. L = LOW, H = HIGH, X = don t care. 2. H = I = 0mA. OUT M9999-072505 2 hbwhelp micrel.com or (408) 955-1690