参数资料
型号: ICS8440259AK-05LF
厂商: INTEGRATED DEVICE TECHNOLOGY INC
元件分类: 时钟产生/分配
英文描述: OTHER CLOCK GENERATOR, QCC32
封装: 5 X 5 MM, 0.925 MM HEIGHT, ROHS COMPLIANT, MO-220, VFQFN-32
文件页数: 1/16页
文件大小: 420K
代理商: ICS8440259AK-05LF
FEMTOCLOCK CRYSTAL/LVCMOS-TO-
LVDS/LVCMOS FREQUENCY SYNTHESIZER
ICS8440259-05
IDT / ICS LVDS/LVCMOS FREQUENCY SYNTHESIZER
1
ICS8440259AK-05 REV. D JULY 30, 2007
PRELIMINARY
Q0
nQ0
Q1
nQ1
Q2
nQ2
Q3
nQ3
Q4
nQ4
Q5
Q6
Q7
1
0
Phase
Detector
VCO
490-680MHz
OSC
REF_CLK
nPLL_BYPASS
XTAL_IN
XTAL_OUT
Pulldown
25MHz
÷32
÷5
÷25
1
0
Q8
Pullup
GENERAL DESCRIPTION
The ICS8440259-05 is a 9 output synthesizer
optimized to generate Gigabit and 10 Gigabit Ether-
net clocks and is a member of the HiPerClockS
family of high performance clock solutions from IDT.
Using a 25MHz, 18pF parallel resonant crystal, the
device will generate 125MHz and 3.90625MHz clocks with mix-
ed LVDS and LVCMOS/LVTTL output levels. The ICS8440259-05
uses IDT’s 3rd generations low phase noise VCO technology and
can achieve <1ps typical rms phase jitter, easily meeting Ethernet
jitter requirements. The ICS8440259-05 is packaged in a small,
32-pin VFQFN package that is optimum for applications with
space limitations.
FEATURES
Five differential LVDS outputs at 125MHz
Three LVCMOS/LVTTL single-ended outputs at 125MHz
One LVCMOS/LVTTL single-ended output at 3.90625MHz
Selectable crystal oscillator interface or LVCMOS/LVTTL
single-ended input and PLL bypass from a single select pin
VCO range: 490MHz - 680MHz
RMS phase jitter @ 125MHz, using a 25MHz crystal
(1.875MHz - 20MHz): 0.41ps (typical), LVDS output
Full 3.3V supply mode
0°C to 70°C ambient operating temperature
Available in both standard (RoHS 5) and lead-free (RoHS6)
packages
HiPerClockS
ICS
PIN ASSIGNMENT
BLOCK DIAGRAM
24
23
22
21
20
19
18
17
Q8
VDDO_LVCMOS
Q7
GND
Q6
VDDO_LVCMOS
Q5
GND
Q0
nQ0
GND
Q1
nQ1
VDDO_LVDS
Q2
nQ2
GND
Q3
nQ3
V
DDO
_
LVDS
Q4
nQ4
GND
V
DD
V
DD
A
nPLL_BYP
ASS
V
DD
nc
REF_CLK
XT
AL_IN
XT
AL_OUT
GND
ICS8440259-05
32-Lead VFQFN
5mm x 5mm x 0.925mm
package body
K Package
Top View
32 31 30 29 28 27 26 25
9 10 11 12 13 14 15 16
1
2
3
4
5
6
7
8
The Preliminary Information presented herein represents a product in pre-production. The noted characteristics are based on initial product characterization
and/or qualification. Integrated Device Technology, Incorporated (IDT) reserves the right to change any circuitry or specifications without notice.
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