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 CLKA Phase Lock Loop CLKB
X1/ICLK 25 MHz crystal or clock X2
Clock Buffer/ Crystal Oscillator 4 GND OE VDDOB
Optional tuning cry...