PRELIMINARY
CLOCK GENERATOR FOR CAVIUM PROCESSORS
ICS8430S10I-02
General Description
Features
The ICS8430S10I-02 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
• One selectable clock for DDR 533/400/667, LVPECL/LVDS
S
interface levels
IC
HiPerClockS™
• Nine LVCMOS/ LVTTL outputs, 20Ω typical output impedance
• Selectable external crystal or differential (single-ended) input
source
PCI/PCI-X bus clocks, and the clocks for both the Gigabit Ethernet
MAC and PHY. The clock generator offers ultra 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 25 MHz parallel resonant
crystal. The extended temperature range of the ICS8430S10I-02
supports telecommunication, networking, and storage
requirements.
• Crystal oscillator interface designed for 25MHz, parallel
resonant crystal
• Differential input pair (CLK, nCLK) accepts LVPECL, LVDS,
LVHSTL, SSTL, HCSL input levels
• Internal resistor bias on nCLK pin allows the user to drive CLK
input with external single-ended (LVCMOS/ LVTTL) input levels
• Full 3.3V or mixed 3.3V core/2.5V output supply mode
• -40°C to 85°C ambient operating temperature
• Available in lead-free (RoHS 6) package
Applications
• Systems using Cavium Processors
• CPE Gateway Design
Pin Assignment
• Home Media Servers
• 802.11n AP or Gateway
• Soho Secure Gateway
• Soho SME Gateway
• Wireless Soho and SME VPN Solutions
• Wired and Wireless Network Security
• Web Servers and Exchange Servers
48 47 46 45 44 43 42 41 40 39 38 37
VDD
nOE_D
GND
VDDO_CD
QC
QD0
QD1
CORE_SEL
GND
1
2
3
4
36
35
34
33
32
31
30
29
28
27
26
25
ICS8430S10I-02
nPLL_SEL
48- Pin TQFP, E-Pad
7mm x 7mm x 1mm
package body
Y Package
XTAL_IN
XTAL_OUT
nXTAL_SEL
5
6
7
8
9
10
11
12
GND
CLK
nOE_REF
VDDO_B
QB0
QB1
VDDO_B
nCLK
nOE_C
nOE_B
Top View
GND
15 16 17 18 19 20 21 22 23
13 14
24
The Preliminary Information presented herein represents a product in pre-production. The noted characteristics are based on initial product characterization and/or qualification.
Integrated Device Technology, Incorporated (IDT) reserves the right to change any circuitry or specifications without notice.
IDT™ / ICS™ CLOCK GENERATOR
1
ICS8430S10BYI-02 REV. A AUGUST 25, 2008