CM3107 Datasheet | California Micro Devices

Features Ideal for Intel 865 Front Side Bus VTT and DDR VTT applications - Sinks and sources 2 Amps - Over current protection - Over temperature protection - Integrated power MOSFETs .. - Excellent accuracy (0.5% load regulation) - Selectable output (1.225V/1.45V or VDDQ/2) - 8-lead SOIC and PSOP packages - Lead-free versions available - Product Description The CM3107 is a sinking and sourcing regulator specifically designed for series-parallel bus termination for high-speed chip set busses as well as DDR memory systems. It can source and sink current up to 2.0A with a load regulation of 0.5%. The VTT output voltage is selectable by VDDQSEL and FSBSEL pins. The VDDQSEL pin controls whether the CM3107 is in DDR memory mode with VTT=VDDQ/2, or in FSB mode. In FSB mode, FSBSEL controls whether VTT is 1.225V or 1.45V. This allows the same chip to be used in two different circuits on an Intel 865-based motherboard. The CM3107 provides over current and over temperature protection, which protect the chip from excessive heating due to high current and high temperature. A shutdown capability using an external transistor reduces power consumption and provides a high impedance output. The CM3107 is housed in 8-lead SOIC and PSOP packages and is available with optional lead-free finishing. Applications - - - - Intel 865/845 Front Side Bus termination Single and dual DDR memory termination Active termination buses Graphics card DDR memory termination Simplified Electrical Schematic VCC VDDQSEL FSBSEL VDDQ 50K Over Temp Over Current Reference Output Select Driver VREF 50K Buffer VSENSE © 2004 California Micro Devices Corp. All rights reserved. 02/02/04 430 N. Mc Carthy Blvd., Milpitas, CA 95035-5112 L Tel: 408.263.3214 L Fax: 408.263.7846 .calmicro. PACKAGE / PINOUT DIAGRAM TOP VIEW VDDQ VTT GND VSENSE .. TOP VIEW VCC VDDQSEL VREF FSBSEL VDDQ V TT GND...