ICS951413 Datasheet | ICS

.. Integrated Circuit Systems, Inc. Programmable System Clock Chip for ATI RS400 P4TM-based Systems Remended Application: ATI RS400 systems using Intel P4TM processors Output Features : - 6 - Pairs of SRC/PCI Express- clocks - 2 - Pairs of programmable SRC/PCI Express (ATIG) clocks - 3 - Pairs of Intel P4 clocks - 3 - 14.318 MHz REF clocks - 1 - 48MHz USB clock - 1 - 33 MHz PCI clock seed Key Specifications: - CPU outputs cycle-cycle jitter < 85ps - SRC output cycle-cycle jitter <125ps - PCI outputs cycle-cycle jitter < 250ps - +/- 300ppm frequency accuracy on CPU & SRC clocks Features /Benefits: - 2 - Programmable Clock Request pins for SRC clocks - Supports CK410 or CK409 frequency table mapping - Spread Spectrum for EMI reduction - Outputs may be disabled via SMBus - External crystal load capacitors for maximum frequency accuracy Functionality - (CK410# = 0) SRC PCI 1 1 1 CPU FS_C FS_B FS_A MHz MHz MHz 0 266.66 100.00 33.33 0 1 133.33 100.00 33.33 0 0 200.00 100.00 33.33 1 1 166.66 100.00 33.33 0 333.33 100.00 33.33 0 1 100.00 100.00 33.33 1 0 400.00 100.00 33.33 1 1 RESERVED...