PRELIMINARY
ICS8430-111
Integrated
Circuit
Systems, Inc.
700MHZ, LOW JITTER
DIFFERENTIAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER
GENERAL DESCRIPTION
FEATURES
The ICS8430-111 is a general purpose, dual out- • Dual differential 3.3V LVPECL output
ICS
put high frequency synthesizer and a member of
• Selectable 14MHz to 27MHz differential CLK, nCLK
orTEST_CLK input
HiPerClockS™
the HiPerClockS™ family of High Performance
Clock Solutions from ICS. The CLK, nCLK pair
can accept most standard differential input lev-
• CLK, nCLK accepts any differential input signal:
LVPECL, LVHSTL, LVDS, SSTL, HCSL
els. The single ended TEST_CLK input accepts LVCMOS or
LVTTL input levels and translates them to 3.3V LVPECL levels.
TheVCO 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.
• 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
0
32 31 30 29 28 27 26 25
CLK
1
M5
M6
M7
M8
N0
N1
N2
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
CLK
nCLK
TEST_CLK
CLK_SEL
VCCA
÷ 16
ICS8430-111
S_LOAD
S_DATA
S_CLOCK
MR
PLL
PHASE DETECTOR
MR
VEE
0
VCO
FOUT0
nFOUT0
FOUT1
nFOUT1
÷ N
9
10 11 12 13 14 15 16
÷ M
1
÷ 2
S_LOAD
S_DATA
S_CLOCK
nP_LOAD
CONFIGURATION
INTERFACE
LOGIC
TEST
32-Lead LQFP
7mm x 7mm x 1.4mm package body
M0:M8
N0:N2
Y Package
TopView
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