932S890C中文资料RD890 System Clock For AMD-Based Servers数据手册Renesas规格书

描述 Description

The 932S890C is a main clock synthesizer chip for SR5690/SR5670 AMD Servers. An SMBus interface allows full control of the device.

特性 Features

Low power differential outputs with integrated series resistors for Zo=50ohm systems
4 -Differential 200MHz CPU pairs
2 - Differential 100MHz HT3 pairs
14 - Differential PCIe Gen2 SRC pairs
1 - Differential non-spread SATA clock
2 - 48MHz USB clocks (180 degrees out of phase for EMI reduction)
2 - SIO clocks (selectable 48MHz or 24MHz). 180 degrees out of phase for EMI reduction
2 - 14.318MHz REF clock outputs
Spread Spectrum
EMI reduction
Outputs may be disabled via SMBus
saves power
External crystal load capacitors
maximum frequency accuracy
CPU output cycle-to-cycle jitter 100ps
SRC output cycle-to-cycle jitter 125ps
48MHz output cycle-to-cycle jitter 130ps
SIO output cycle-to-cycle jitter 150ps
SRC output phase jitter 3.1ps rms (PCIe Gen2)
+/- 50ppm frequency accuracy on all clocks, assuming REF is trimmed to 0 ppm)