參數(shù)資料
型號(hào): ICS650-14B
英文描述: Networking System Clock
中文描述: 網(wǎng)絡(luò)系統(tǒng)時(shí)鐘
文件頁(yè)數(shù): 1/4頁(yè)
文件大?。?/td> 45K
代理商: ICS650-14B
ICS650-14B
Networking System Clock
MDS 650-14B A
Integrated Circuit Systems, Inc. 525 Race Street San Jose CA 95126(408)295-9800tel www.icst.com
1
Revision 082800
Printed 11/15/00
PRELIMINARY INFORMATION
The ICS650-14B is a low cost, low jitter, high
performance clock synthesizer customized for
networking systems applications. Using analog
Phase-Locked Loop (PLL) techniques, the device
accepts a 25.0 MHz clock or fundamental mode
crystal input to produce multiple output clocks of
one fixed 25.0 MHz, a four (plus one) frequency
selectable bank, and two frequency selectable
clocks. All output clocks are frequency locked
together. The ICS650R-14B outputs
all have 0 ppm synthesis error.
Block Diagram
Description
Features
Packaged in 20 pin (150 mil) SSOP (QSOP)
25.00 MHz fundamental crystal or clock input
One fixed output clock of one 25.0 MHz
One bank of four frequency selectable
output clocks
Three frequency selectable clock outputs
Zero ppm synthesis error in all clocks
Ideal for networking systems
Full CMOS output swing
Advanced, low power, sub-micron CMOS process
3.0V to 5.5V operating voltage
Industrial temperature range available
Clock
Buffer/
Crystal
Oscillator
VDD
GND
Clock Synthesis
and Control
Circuitry
25.00 MHz
crystal or clock
X1/ICLK
25.00 MHz
2
2
Output
Buffer
CLKA5
Output
Buffer
X2
CLKB
Output
Buffer
Optional crystal capacitors are shown and may be required for tuning of initial accuracy (determined once per board).
OE (All outputs)
Output
Buffer
CLKA 1:4
4
SELA 0:1
2
SELB 0:1
2
SELC
CLKC
Output
Buffer
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