ICS84320-01 Datasheet, PDF (1/21 Pages) Integrated Circuit Systems – 780MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER

ICS84320-01
780MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL
LVPECL FREQUENCY SYNTHESIZER
GENERAL DESCRIPTION
The ICS84320-01 is a general purpose, dual out-
ICS
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 IDT. 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.
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: 2ps (typical)
• RMS phase jitter at 155.52MHz, using a 38.88MHz crystal
(12kHz to 20MHz): 2.5ps (typical)
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
• Available in both standard (RoHS 5) and lead-free RoHS (6)
packages
BLOCK DIAGRAM
VCO_SEL
XTAL_SEL
TEST_CLK
XTAL1
XTAL2
0
OSC ¹
MR
S_LOAD
S_DATA
S_CLOCK
nP_LOAD
M0:M8
N0:N1
84320AY-01
PLL
PHASE DETECTOR
VCO
÷M
÷N
÷1
0 ^÷2
÷4
1
÷8
CONFIGURATION
INTERFACE
LOGIC
PIN ASSIGNMENT
FOUT0
nFOUT0
FOUT1
nFOUT1
TEST
1
32 31 30 29 28 27 26 25
M5 1
M6 2
M7 3
M8 4
N0 5
N1 6
nc 7
VEE 8
ICS84320-01
24 XTAL2
23 TEST_CLK
22 XTAL_SEL
2 1 VCCA
20 S_LOAD
19 S_DATA
18 S_CLOCK
17 MR
9 10 11 12 13 14 15 16
32-Lead LQFP
7mm x 7mm x 1.4mm package body
Y Package
Top View
32-Lead VFQFN
5mm x 5mm x 0.925 package body
K Package
Top View
REV. C OCTOBER 22, 2007