Integrated Circuit Systems ICS932S200
The ICS932S200 is a dual CPU clock generator for serverworks HE-T, HE-SL-T, LE-T chipsets for P III type processors in a Dual-CPU system. This simplifies EMI qualification without resorting to board design iterations or costly shielding. The ICS932S200 employs a proprietary closed loop design, which tightly controls the percentage of spreading over process and temperature variations.| Part No. | ICS932S200 |
|---|---|
| Datasheet | ICS932S200 Download |
| Manufacturer |  Integrated Circuit Systems |
| Description | Frequency Timing Generator |
| Buy | Stock & Price |
GENERAL DESCRIPTION
Single ended CPU clocks provide faster than 1.5V/ns transition times by parallel connection of 2 CPU pins to each processor. Spread Spectrum may be enabled by driving the SPREAD# pin active. Spread spectrum typically reduces system EMI by 8dB to 10dB. Key Specification:● CPU Output Jitter: 150ps
● IOAPIC Output Jitter: 250ps
● 3V66, PCI Output Jitter: 250ps
● CPU Output Skew: <175ps
● PCI Output Skew: <500ps
● 3V66 Output Skew <250ps
● IOAPIC Output Skew <250ps
● CPU to 3V66 Output Offset: 0 - 1.5ns (CPU leads)
● CPU to PCI Output Offset: 1.5 - 4.0ns (CPU leads)
● CPU to APIC Output Offset: 1.5 - 4.0ns (CPU leads) Block Diagram PLL2 48MHz X1 XTAL X2 OSC PLL1 Spread Spectrum PD# PCI_STOP# CPU_STOP# SPREAD# SEL 133/100# SEL0 SEL1 Control Logic Config. Reg. CPU DIVDER IOAPIC DIVDER PCI DIVDER Stop 3V66 DIVDER REF (1:0) 2 CPUCLK (5:0) 6 IOAPIC (2:0) 3 PCICLK (4:0) 5 PCICLK_F 3V66 (1:0) 2
FEATURES
● Generates the following system clocks: - 6 CPU clocks ( 2.5V, 100/133MH...
