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Integrated Circuit Systems - 350MHZ/ CRYSTAL-TO-3.3V/2.5V LVPECL FREQUENCY SYNTHESIZER W/FANOUT BUFFER

Numéro de référence ICS84314AYLFT
Description 350MHZ/ CRYSTAL-TO-3.3V/2.5V LVPECL FREQUENCY SYNTHESIZER W/FANOUT BUFFER
Fabricant Integrated Circuit Systems 
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ICS84314AYLFT fiche technique
Integrated
Circuit
Systems, Inc.
ICS84314
350MHZ, CRYSTAL-TO-3.3V/2.5V LVPECL
FREQUENCY SYNTHESIZER W/FANOUT BUFFER
GENERAL DESCRIPTION
ICS
The ICS84314 is a general purpose quad output
frequency synthesizer and a member of the
HiPerClockS™ HiPerClockS™ family of High Performance Clock
Solutions from ICS. When the device uses par-
allel loading, the M bits are programmable and
the output divider is hard-wired for divide by 2 thus providing
a frequency range of 125MHz to 350MHz. In serial program-
ming mode, the M bits are programmable and the output di-
vider can be set for either divide by 2 or divide by 4, providing
a frequency range of 62.5MHz to 350MHz. The low cycle-
cycle jitter and broad frequency range of the ICS84314 make
it an ideal clock generator for a variety of demanding applica-
tions which require high performance.
FEATURES
Fully integrated PLL
4 differential 3.3V or 2.5V LVPECL outputs
Selectable crystal oscillator interface
or LVCMOS TEST_CLK input
Output frequency range: 62.5MHz to 350MHz
VCO range: 250MHz to 700MHz
Parallel interface for programming counter
and output dividers during power-up
Serial 3 wire interface
Cycle-to-cycle jitter: 23ps (typical)
Output skew: 16ps (typical)
Output duty cycle: 49% < odc < 51%, fout 125MHz
Full 3.3V or mixed 3.3V core, 2.5V operating supply
0°C to 85°C ambient operating temperature
Lead-Free package available
BLOCK DIAGRAM
PIN ASSIGNMENT
VCO_SEL
XTAL_SEL
TEST_CLK
0
32 31 30 29 28 27 26 25
M4 1
M5 2
24 TEST_CLK
23 XTAL_SEL
XTAL1
XTAL2
OSC
1
÷ 16
M6 3
M7 4
M8 5
VEE 6
ICS84314
2 2 VCCA
21 S_LOAD
20 S_DATA
19 S_CLOCK
VCC 7
18 MR
PLL
PHASE DETECTOR
Q0
nQ0
VCCO
8 17
9 10 11 12 13 14 15 16
VCCO
MR Q1
VCO
0 ÷2
nQ1
÷M
÷4
1
Q2
nQ2
S_LOAD
S_DATA
S_CLOCK
nP_LOAD
÷2
CONFIGURATION
INTERFACE
LOGIC
Q3 32-Lead LQFP
nQ3 7mm x 7mm x 1.4mm package body
Y Package
Top View
M0:M8
84314AY
www.icst.com/products/hiperclocks.html
1
REV. C JANUARY 27, 2005

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