CDC921 is a clock synthesizer/driver produced by TI, which supports a single Pentium III class microprocessor and can generate multiple output frequencies. It also has low output skew and jitter and can be used on PC motherboards.
The CDC921 is a clock synthesizer/driver designed to generate multiple system clock signals including CPU, CPU_DIV2, 3V66, PCI, APIC, REF, and 48MHz outputs. It supports systems with a single Pentium III class microprocessor by generating all frequencies from a standard 14.318-MHz crystal input or an external reference clock.
| Operating free-air temperature range | -0 °C to 85°C |
|---|---|
| Supply voltage VDD (2.5V) | 2.375 - 2.625 V |
The device requires a series fundamental crystal with fO = 14.31818 MHz.
Yes, instead of a crystal, a reference clock input can be provided at the XIN input.
Yes, it includes Spread Spectrum Clocking (SSC) with 0.5% downspread for reduced EMI performance.