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Main-Chip Clock Generator for SiS 741/746FX/748 Chipsets
General Description

The RTM360-746R is a 48-pin package, main-chip frequency generator that meets clock synthesizer/driver specifications of SiS 746/746FX/748/741 chipset solutions for AMD CPUs. The RTM360-746R can be implemented with a Realtek Zero-delay DDR clock buffer, the RTM680-647 (48-pin SSOP, supporting 3 DDR) or the RTM680-627 (28-pin SSOP, supporting 2 DDR). The RTM360-746R provides a standard serial bus for programmable clock functions. Through this interface, spread spectrum technology can be enabled to reduce EMI.

  • CPU frequency ratio supports up to 200MHz (166/133/100MHz)
  • Power down feature
  • Programmable spread spectrum
  • Programmable driving strength
  • Programmable skew delay
  • Programmable PLL frequency
  • Programmable loop filter
  • Programmable smooth-divider
  • Programmable current Iref
  • Programmable current Vref
  • Programmable watchdog & smooth reset
  • DOS, Windows 9x/NT/2000/XP apps
  • Free-run mode support

RTM360-746R Pin Assignments



RTM360-746R Block Diagram




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