ICS8430-61 Datasheet, PDF (1/15 Pages) Integrated Circuit Systems – 500MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
ICS8430-61
500MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL
LVPECL FREQUENCY SYNTHESIZER
GENERAL DESCRIPTION
ICS
The ICS8430-61 is a general purpose, dual output
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 ICS8430-61 has a select-
able TEST_CLK or crystal inputs. The VCO operates at a fre-
quency range of 250MHz to 500MHz. The VCO frequency is
programmed in steps equal to the value of the input reference
or crystal frequency. The VCO and output frequency can be
programmed using the serial or parallel interfaces to the con-
figuration logic. Frequency steps as small as 1MHz can be
achieved using a 16MHz crystal or TEST_CLK.
FEATURES
• Dual differential 3.3V LVPECL outputs
• Selectable crystal oscillator interface
or LVCMOS/LVTTL TEST_CLK
• Output frequency range: 20.83MHz to 500MHz
• Crystal input frequency range: 14MHz to 27MHz
• VCO range: 250MHz to 500MHz
• Parallel or serial interface for programming counter
and output dividers
• RMS period jitter: 6ps (maximum)
• Cycle-to-cycle jitter: 30ps (maximum)
• 3.3V supply voltage
• 0°C to 70°C ambient operating temperature
BLOCK DIAGRAM
VCO_SEL
XTAL_SEL
TEST_CLK
XTAL_IN
XTAL_OUT
MR
S_LOAD
S_DATA
S_CLOCK
nP_LOAD
M0:M8
N0:N2
OSC
0
1
÷ 16
PLL
PHASE DETECTOR
VCO
÷M
÷1
÷1.5
÷2
÷3
÷4
0
÷6
÷8
÷12
1
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
N2 7
ICS8430-61
24 XTAL_IN
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
8430AY-61
www.icst.com/products/hiperclocks.html
1
REV. A JULY 22, 2004