ICS8402I Datasheet, PDF (1/19 Pages) Integrated Circuit Systems – 350MHZ, CRYSTAL-TO-LVCMOS / LVTTL FREQUENCY SYNTHESIZER

350MHZ, CRYSTAL-TO-LVCMOS/LVTTL
FREQUENCY SYNTHESIZER
ICS8402I
General Description
The ICS8402I is a general purpose,
ICS
Crystal-to-LVCMOS/LVTTL High Frequency
HiPerClockS™ _{Synthesizer and a member of the HiPerClockS™}
family of High Performance Clock Solutions from
IDT. The ICS8402I has a selectable TEST_CLK or
crystal inputs. The VCO operates at a frequency range of 250MHz
to 700MHz. 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 configuration logic. The low phase noise
characteristics of the ICS8402I make it an ideal clock source for
Gigabit Ethernet and SONET applications.
Features
• Two LVCMOS/LVTTL outputs
• Selectable crystal oscillator interface or LVCMOS/LVTTL
TEST_CLK
• Output frequency range: 15.625MHz to 350MHz
• Crystal input frequency range: 12MHz to 40MHz
• VCO range: 250MHz to 700MHz
• Parallel or serial interface for programming counter and
output dividers
• RMS period jitter: 30ps (maximum)
• Cycle-to-cycle jitter: 100ps (maximum)
• Full 3.3V or mixed 3.3V core/2.5V output supply
• -40°C to 85°C ambient operating temperature
• Available in both standard (RoHS 5) and lead-free (RoHS 6)
packages
Block Diagram
OE0
OE1
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
VCO
0
÷2
÷4
÷M
1
÷8
÷16
CONFIGURATION
INTERFACE
LOGIC
Pin Assignment
Q0
Q1
TEST
M5
M6
M7
M8
N0
N1
nc
GND
32 31 30 29 28 27 26 25
1
24
2
23
3
22
4
21
5
20
6
19
7
18
8
17
9 10 11 12 13 14 15 16
XTAL_OUT
TEST_CLK
XTAL_SEL
VDDA
S_LOAD
S_DATA
S_CLOCK
MR
ICS8402I
32 Lead LQFP
7mm x 7mm x 1.4mm package body
Y Package
Top View
32 Lead VFQFN
5mm x 5mm x 0.925mm package body
K Package
Top View
IDT™ / ICS™ LVCMOS/LVTTL FREQUENCY SYNTHESIZER
1
ICS8402AYI REV. A OCTOBER 16, 2007