Integrated
Circuit
Systems, Inc.
ICS84320-01
780MH
Z
, C
RYSTAL
-
TO
-3.3V D
IFFERENTIAL
LVPECL F
REQUENCY
S
YNTHESIZER
F
EATURES
•
Dual differential 3.3V LVPECL outputs
•
Selectable crystal oscillator interface
or LVCMOS/LVTTL TEST_CLK
•
Output frequency range: 77.5MHz to 780MHz
•
Crystal input frequency range: 14MHz to 40MHz
•
VCO range: 620MHz to 780MHz
•
Parallel or serial interface for programming counter
and output dividers
•
Duty cycle: 49% - 51% (N > 1)
•
RMS period jitter: 2.0ps (typical)
•
RMS phase jitter at 155.52MHz, using a 38.88MHz crystal
(12KHz to 20MHz): 2.5ps (typical)
Phase noise: 155.52MHz (typical), using a 38.88MHz crystal
Offset
Noise Power
100Hz .................. -90.5 dBc/Hz
1KHz ................ -114.2 dBc/Hz
10KHz ................ -123.6 dBc/Hz
100KHz ................ -128.1 dBc/Hz
•
3.3V supply voltage
•
Lead-Free/Annealed package available
•
0°C to 70°C ambient operating temperature
G
ENERAL
D
ESCRIPTION
The ICS84320-01 is a general purpose, dual out-
put Crystal-to-3.3V Differential LVPECL High Fre-
HiPerClockS™
quency Synthesizer and a member of the
HiPerClockS™ family of High Performance Clock
Solutions from ICS. The ICS84320-01 has a se-
lectable TEST_CLK or crystal inputs. The VCO operates at a
frequency range of 620MHz to 780MHz. The VCO frequency
is programmed in steps equal to the value of the input refer-
ence or crystal frequency. The VCO and output frequency
can be programmed using the serial or parallel interfaces to
the configuration logic. The low phase noise characteristics
of the ICS84320-01 make it an ideal clock source for 10 Gigabit
Ethernet, SONET, and Serial Attached SCSI applications.
ICS
B
LOCK
D
IAGRAM
VCO_SEL
XTAL_SEL
TEST_CLK
XTAL1
OSC
XTAL2
0
P
IN
A
SSIGNMENT
VCO_SEL
nP_LOAD
XTAL1
M4
M3
M2
M1
M0
32 31 30 29 28 27 26 25
1
M5
M6
M7
M8
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16
TEST
V
CC
FOUT1
nFOUT1
V
CCO
FOUT0
nFOUT0
V
EE
24
23
22
XTAL2
TEST_CLK
XTAL_SEL
V
CCA
S_LOAD
S_DATA
S_CLOCK
MR
PLL
PHASE DETECTOR
MR
÷
N
÷
1
÷
2
÷
4
÷
8
N0
N1
nc
FOUT0
nFOUT0
FOUT1
nFOUT1
ICS84320-01
21
20
19
18
17
VCO
÷
M
0
1
V
EE
S_LOAD
S_DATA
S_CLOCK
nP_LOAD
M0:M8
N0:N1
84320AY-01
CONFIGURATION
INTERFACE
LOGIC
TEST
32-Lead LQFP
7mm x 7mm x 1.4mm package body
Y Package
Top View
REV. A AUGUST 24, 2004
www.icst.com/products/hiperclocks.html
1
ICS [ INTEGRATED CIRCUIT SYSTEMS ]
