ICS9148-47 Datasheet (Integrated Circuit Systems) - Pentium/ProTM System Clock Chip

ICS9148-47, Pentium/ProTM System Clock Chip

The ICS9148-47 is part of a reduced pin count two-chip clock solution for designs using an Intel BX style chipset.

Companion SDRAM buffers are ICS9179-11 and 12.

There are two PLLs, with the first PLL capable of spread spectrum operation.

Spread spectrum typically reduces system EMI by 8-10dB.

The

ICS9148-47 Features

* Generates system clocks for CPU, PCI, IOAPIC , 14.314 MHz, 48 and 24MHz. Supports single or dual processor systems Skew from CPU (earlier) to PCI clock 1 to 4ns Separate 2.5V and 3.3V supply pins 2.5V outputs: CPU, IOAPIC 3.3V outputs: PCI, REF No power supply sequence requiremen