ICS84314 Datasheet, PDF (1/18 Pages) Integrated Circuit Systems – 350MHZ, CRYSTAL-TO-3.3V/2.5V LVPECL FREQUENCY SYNTHESIZER W/FANOUT BUFFER

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
Q2
1
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