ICS8430-111 Datasheet, PDF (1/16 Pages) Integrated Circuit Systems – 700MHZ, LOW JITTER DIFFERENTIAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS8430-111
700MHZ, LOW JITTER
DIFFERENTIAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER
GENERAL DESCRIPTION
The ICS8430-111 is a general purpose, dual out-
ICS
put high frequency synthesizer and a member of
HiPerClockS™ _{the HiPerClockS™ family of High Performance}
Clock Solutions from ICS. The CLK, nCLK pair
can accept most standard differential input lev-
els. The single ended TEST_CLK input accepts LVCMOS or
LVTTL input levels and translates them to 3.3V LVPECL levels.
The VCO operates at a frequency range of 200MHz to 700MHz.
With the output configured to divide the VCO frequency by 2,
output frequency steps as small as 2MHz can be achieved
using a 16MHz differential or single ended reference clock. Out-
put frequencies up to 700MHz can be programmed using the
serial or parallel interfaces to the configuration logic. The low
jitter and frequency range of the ICS8430-111 makes it an ideal
clock generator for most clock tree applications.
FEATURES
• Dual differential 3.3V LVPECL output
• Selectable 14MHz to 27MHz differential CLK, nCLK
or TEST_CLK input
• CLK, nCLK accepts any differential input signal:
LVPECL, LVHSTL, LVDS, SSTL, HCSL
• TEST_CLK accepts the following input types:
LVCMOS, LVTTL
• Output frequency range up to 700MHz
• VCO range: 200MHz to 700MHz
• Parallel or serial interface for programming counter
and output dividers
• Cycle-to-cycle jitter: 25ps (maximum)
• 3.3V supply voltage
• 0°C to 70°C ambient operating temperature
• Industrial termperature information available upon request
BLOCK DIAGRAM
PIN ASSIGNMENT
VCO_SEL
CLK_SEL
TEST_CLK
CLK
nCLK
MR
S_LOAD
S_DATA
S_CLOCK
nP_LOAD
M0:M8
N0:N2
0
1
÷ 16
PLL
PHASE DETECTOR
VCO
÷M
÷2
0
÷N
1
CONFIGURATION
INTERFACE
LOGIC
FOUT0
nFOUT0
FOUT1
nFOUT1
32 31 30 29 28 27 26 25
M5 1
M6 2
M7 3
M8 4
N0 5
N1 6
N2 7
VEE 8
ICS8430-111
24 CLK
23 TEST_CLK
22 CLK_SEL
2 1 VCCA
20 S_LOAD
19 S_DATA
18 S_CLOCK
17 MR
9 10 11 12 13 14 15 16
TEST
32-Lead LQFP
7mm x 7mm x 1.4mm package body
Y 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.
8430DY-111
www.icst.com/products/hiperclocks.html
REV. F JUNE 1, 2005
1