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ICS348-22 Datasheet

QUAD PLL CLOCK SYNTHESIZER

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QUAD PLL CLOCK SYNTHESIZER
PRELIMINARY DATASHEET
ICS348-22
Description
The ICS348-22 synthesizer generates up to 9
high-quality, high-frequency clock outputs including
multiple reference clocks from a low frequency crystal
or clock input. The ICS348-22 has four independent
on-chip PLLs and is designed to replace crystals and
crystal oscillators in most electronic systems.
Using Phase-Locked Loop (PLL) techniques, the
device runs from a standard fundamental mode,
inexpensive crystal, or clock. It can replace multiple
crystals and oscillators, saving board space and cost.
Features
Packaged as 20-pin SSOP (QSOP)
Eight addressable registers
Replaces multiple crystals and oscillators
Output frequencies up to 189 MHz at 3.3 V
Input crystal frequency of 25 MHz
Up to nine reference outputs
Up to two sets of four low-skew outputs
Operating voltages of 3.3 V
Advanced, low power CMOS process
Available in Pb (lead) free packaging
Block Diagram
3
S2:S0
ROM
with PLL
Values
25 MHz
crystal input
X1
X2
Crystal
Oscillator
External capacitors are
required with a crystal input.
VDD 3
PLL1
PLL2
PLL3
PLL4
Divide
Logic
and
Output
Enable
Control
GND 2
PDTS
CLK1
CLK2
CLK3
CLK4
CLK5
CLK6
CLK7
CLK8
CLK9
IDT™ / ICS™ QUAD PLL CLOCK SYNTHESIZER
1
ICS348-22 REV B 012005


Integrated Device Technology Electronic Components Datasheet

ICS348-22 Datasheet

QUAD PLL CLOCK SYNTHESIZER

No Preview Available !

ICS348-22
QUAD PLL CLOCK SYNTHESIZER
EPROM CLOCK SYNTHESIZER
Pin Assignment
X1 1
S0 2
S1 3
CLK9 4
VDD 5
GND 6
CLK1 7
CLK2 8
CLK3 9
CLK4 10
20 X2
19 VDD
18 PDTS
17 S2
16 VDD
15 GND
14 CLK5
13 CLK6
12 CLK7
11 CLK8
20-pin (150 mil) SSOP (QSOP)
Output Configuration Table
S2 S1 S0
Outputs
0 0 0 CLK1,2,3,4,5,9=127 MHz, CLK6=CLK7=187 MHz, CLK8=189 MHz,
0 0 1 CLK1,2,3,4,5,9=127 MHz, CLK6=CLK7=187 MHz, CLK8=189 MHz,
0 1 0 CLK1,2,3,4,5,9=127 MHz, CLK6=CLK7=187 MHz, CLK8=189 MHz,
0 1 1 CLK1,2,3,4,5,9=127 MHz, CLK6=CLK7=187 MHz, CLK8=189 MHz,
1 0 0 CLK1,2,3,4,5,9=127 MHz, CLK6=CLK7=187 MHz, CLK8=189 MHz,
1 0 1 CLK1,2,3,4,5,9=127 MHz, CLK6=CLK7=187 MHz, CLK8=189 MHz,
1 1 0 CLK1,2,3,4,5,9=127 MHz, CLK6=CLK7=187 MHz, CLK8=189 MHz,
1 1 1 CLK1,2,3,4,5,9=127 MHz, CLK6=CLK7=OFF, CLK8=189 MHz,
IDT™ / ICS™ QUAD PLL CLOCK SYNTHESIZER
2
ICS348-22 REV B 012005



Part Number ICS348-22
Description QUAD PLL CLOCK SYNTHESIZER
Maker IDT
Total Page 3 Pages
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ICS348-22 Datasheet PDF





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