ICS650-40 Datasheet, PDF (1/6 Pages) Integrated Circuit Systems – ETHERNET SWITCH CLOCK SOURCE

ICS650-40
ETHERNET SWITCH CLOCK SOURCE
Description
The ICS650-40 is a clock chip designed for use in
Ethernet Switch applications. Using ICS’ patented
Phase-Locked Loop (PLL) techniques, the device takes
a 25 MHz crystal input and produces various output
clock frequencies as listed in Output Select Table.
Features
• Packaged in 16-pin TSSOP
• Available in Pb (lead) free package
• Operating voltage of 3.3 V
• Low power consumption
• Input frequency of 25 MHz
• Low long-term jitter
• 2.5 V to 3.3 V clock outputs
Block Diagram
VDD
3
VDDOA
S1:S0
2
Control
Logic
Phase Lock Loop
X1/ICLK
25 MHz
crystal or clock _X2
Clock
Buffer/
Crystal
Oscillator
Optional tuning crystal
capacitors
4
GND OE
VDDOB
CLKA
CLKB
MDS 650-40 C
1
Revision 060705
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