ICS84321 Datasheet, PDF (1/18 Pages) Integrated Circuit Systems – 260MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
ICS84321
260MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL
LVPECL FREQUENCY SYNTHESIZER
GENERAL DESCRIPTION
FEATURES
ICS
HiPerClockS™
The ICS84321 is a general purpose, dual output
Crystal-to-3.3V Differential LVPECL High Frequency
Synthesizer and a member of the HiPerClockS™
family of High Performance Clock Solutions from
• Dual differential 3.3V LVPECL outputs
• Selectable crystal oscillator interface
or LVCMOS/LVTTL TEST_CLK
ICS.The ICS84321 has a selectable TEST_CLK or • Output frequency range: 103.3MHz to 260MHz
crystal inputs.The VCO operates at a frequency range of 620MHz
to 780MHz. The VCO frequency is programmed in steps equal ^{• Crystal input frequency range: 14MHz to 40MHz}
to the value of the input reference or crystal frequency.The VCO • VCO range: 620MHz to 780MHz
and output frequency can be programmed using the serial or
parallel interfaces to the configuration logic.
• Parallel or serial interface for programming counter
and output dividers
• RMS period jitter: 3ps (typical)
• RMS phase jitter at 155.52MHz, using a 38.88MHz crystal
(12kHz to 20MHz): 2.5ps (typical)
Phase noise: 155.52MHz
Offset
Noise Power
100Hz .................. -84.1 dBc/Hz
1kHz ................ -109.8 dBc/Hz
10kHz ................ -126.3 dBc/Hz
100kHz ................ -128.7 dBc/Hz
• 3.3V supply voltage
• 0°C to 70°C ambient operating temperature
• Lead-Free package RoHS compliant
BLOCK DIAGRAM
VCO_SEL
XTAL_SEL
TEST_CLK
XTAL_IN
XTAL_OUT
0
OSC ¹
MR
S_LOAD
S_DATA
S_CLOCK
nP_LOAD
M0:M8
N0:N1
PLL
PHASE DETECTOR
÷3
VCO
0 ^÷4
÷5
÷M
1
÷6
CONFIGURATION
INTERFACE
LOGIC
PIN ASSIGNMENT
FOUT0
nFOUT0
FOUT1
nFOUT1
TEST
32 31 30 29 28 27 26 25
M5 1
M6 2
M7 3
M8 4
N0 5
N1 6
nc 7
ICS84321
24 XTAL_OUT
23 TEST_CLK
22 XTAL_SEL
2 1 VCCA
20 S_LOAD
19 S_DATA
18 S_CLOCK
VEE 8
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
84321AY
www.icst.com/products/hiperclocks.html
1
REV. B JUNE 9, 2005