ICS84320-01K Datasheet, PDF (1/16 Pages) Integrated Circuit Systems – 780MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS84320-01K
780MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL
LVPECL FREQUENCY SYNTHESIZER
GENERAL DESCRIPTION
ICS
The ICS84320-01K 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 ICS84320-01K 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 ICS84320-01K make it an ideal clock source for 10 Giga-
bit Ethernet, SONET, and Serial Attached SCSI applications.
FEATURES
• 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
• 0°C to 70°C ambient operating temperature
BLOCK DIAGRAM
PIN ASSIGNMENT
VCO_SEL
XTAL_SEL
TEST_CLK
XTAL1
XTAL2
0
OSC ¹
MR
S_LOAD
S_DATA
S_CLOCK
nP_LOAD
M0:M8
N0:N1
PLL
PHASE DETECTOR
VCO
÷M
÷N
÷1
0 ^÷2
÷4
1
÷8
CONFIGURATION
INTERFACE
LOGIC
FOUT0
nFOUT0
FOUT1
nFOUT1
TEST
32 31 30 29 28 27 26 25
M5 1
24 XTAL2
M6 2
23 TEST_CLK
M7 3
22 XTAL_SEL
M8 4 _ICS84320-01K 21 VCCA
N0 5
20 S_LOAD
N1 6
19 S_DATA
nc 7
18 S_CLOCK
VEE 8
17 MR
9 10 11 12 13 14 15 16
32-Lead VFQFN
5mm x 5mm x 0.95 package body
K Package
Top View
The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on initial
product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice.
84320AK-01
www.icst.com/products/hiperclocks.html
REV. A FEBRUARY 6, 2004
1