參數(shù)資料
型號: ICS8442AYLFT
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類: 時鐘產(chǎn)生/分配
英文描述: 700 MHz, OTHER CLOCK GENERATOR, PQFP32
封裝: 7 X 7 MM, 1.4 MM HEIGHT, ROHS COMPLIANT, MS-026BBA, LQFP-32
文件頁數(shù): 1/16頁
文件大?。?/td> 399K
代理商: ICS8442AYLFT
8442AY
www.icst.com/products/hiperclocks.html
REV. D MAY 10, 2005
1
Integrated
Circuit
Systems, Inc.
ICS8442
700MHZ, CRYSTAL OSCILLATOR-TO-DIFFERENTIAL
LVDS FREQUENCY SYNTHESIZER
GENERAL DESCRIPTION
The ICS8442 is a general purpose, dual output
Crystal-to-Differential LVDS High Frequency
Synthesizer and a member of the HiPerClockS
family of High Performance Clock Solutions from
ICS. The ICS8442 has a selectable TEST_CLK
or crystal input. The TEST_CLK input accepts LVCMOS or
LVTTL input levels and translates them to LVDS levels. 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
interface to the configuration logic. The low phase noise
characteristics of the ICS8442 makes it an ideal clock source
for Gigabit Ethernet and Sonet applications.
BLOCK DIAGRAM
PIN ASSIGNMENT
FEATURES
Dual differential LVDS outputs
Selectable crystal oscillator interface or
LVCMOS/LVTTL TEST_CLK
Output frequency range: 31.25MHz to 700MHz
Crystal input frequency range: 10MHz to 25MHz
VCO range: 250MHz to 700MHz
Parallel or serial interface for programming counter
and output dividers
RMS period jitter: 2.7ps (typical)
Cycle-to-cycle jitter: 18ps (typical)
3.3V supply voltage
0°C to 85°C ambient operating temperature
Lead-Free package fully RoHS compliant
32 31 30 29 28 27 26 25
9
10 11 12 13 14 15 16
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
XTAL_OUT
TEST_CLK
XTAL_SEL
VDDA
S_LOAD
S_DATA
S_CLOCK
MR
M5
M6
M7
M8
N0
N1
nc
GND
nFOUT0
FOUT0
V
DD
nFOUT1
FOUT1
V
DD
TEST
X
T
AL_IN
nP_LOAD
VCO_SEL
M0
M1
M2
M3
M4
32-Lead LQFP
7mm x 7mm x 1.4mm package body
Y Package
Top View
ICS8442
HiPerClockS
ICS
OSC
VCO_SEL
XTAL_SEL
TEST_CLK
XTAL_IN
XTAL_OUT
S_LOAD
S_DATA
S_CLOCK
nP_LOAD
M0:M8
N0:N1
VCO
PLL
FOUT0
nFOUT0
FOUT1
nFOUT1
TEST
CONFIGURATION
INTERFACE
LOGIC
÷ M
0
1
0
1
PHASE DETECTOR
÷ 1
÷ 2
÷ 4
÷ 8
MR
DATA SHEET
ICS8442
IDT / ICS 700MHZ, CRYSTAL OSCILLATOR-TO-DIFFERENTIAL LVDS FREQUENCY SYNTHESIZER
ICS8442
1
700MHZ, CRYSTAL OSCILLATOR-TO-DIFFERENTIAL
LVDS FREQUENCY SYNTHESIZER
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