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.

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

Applications

• Intel 865/845 Front Side Bus termination

• Single and dual DDR memory termination

• Active termination buses

• Graphics card DDR memory termination