General Description

The ICS8430S803I is a PLL-based clock generator specifically

designed for Cavium Networks SoC processors. This high

performance device is optimized to generate the processor core

reference clock, the DDR reference clocks, the PCI/PCI-X bus

clocks, and the clocks for both the Gigabit Ethernet MAC and PHY.

The clock generator offers low-jitter, low-skew clock outputs, and

edge rates that easily meet the input requirements for the

CN30XX/CN31XX/CN38XX/CN58XX processors. The output

frequencies are generated from a 25MHz external input source or an

external 25MHz parallel resonant crystal. The extended temperature

range of the ICS8430S803I supports telecommunication,

networking, and storage requirements.

特性 Features

? One selectable differential output pair for DDR 533/400/667,

LVPECL, LVDS interface levels

? Nine LVCMOS/ LVTTL outputs, 23? typical output impedance

? Selectable external crystal or differential input source

? Crystal oscillator interface designed for 25MHz, parallel resonant

crystal

? Differential input pair (PCLK, nPCLK) accepts LVPECL, LVDS,

CML, input levels

? Internal resistor bias on nPCLK pin allows the user to drive PCLK

input with external single-ended (LVCMOS/ LVTTL) input levels

? Power supply modes:

CORE / OUTPUT

3.3V / 3.3V LVDS, LVPECL, LVCMOS

3.3V / 2.5V LVCMOS

? -40°C to 85°C ambient operating temperature

? Available in lead-free (RoHS 6) package