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參數(shù)資料
| 型號(hào)： | 0002A01L |
| 英文描述： | FEMTOCLOCKS⑩ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
| 中文描述： | FEMTOCLOCKS⑩晶體到的LVCMOS / LVTTL頻率合成器 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大小： | 199K |
| 代理商： | 0002A01L |
Integrated
Circuit
Systems, Inc.
840002AG-01
www.icst.com/products/hiperclocks.html
REV. B JANUARY 13, 2006
1
ICS840002-01
FEMTOCLOCKSCRYSTAL-TO-
LVCMOS/LVTTL FREQUENCY SYNTHESIZER
GENERAL DESCRIPTION
The ICS840002-01 is a 2 output LVCMOS/LVTTL
Synthesizer optimized to generate Ethernet
reference clock frequencies and is a member of
the HiPerClocksTM family of high performance
clock solutions from ICS. Using a 25MHz 18pF
parallel resonant crystal, the following frequencies can be
generated based on the 2 frequency select pins (F_SEL1:0):
156.25MHz, 125MHz, and 62.5MHz. The ICS840002-01 uses
ICS’ 3rd generation low phase noise VCO technology and can
achieve 1ps or lower typical random rms phase jitter, easily
meeting Ethernet jitter requirements. The ICS840002-01 is
packaged in a small 16-pin TSSOP package.
HiPerClockS
ICS
BLOCK DIAGRAM
PIN ASSIGNMENT
F_SEL0
nXTAL_SEL
TEST_CLK
OE
MR
nPLL_SEL
VDDA
VDD
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
F_SEL1
GND
Q0
Q1
VDDO
XTAL_IN
XTAL_OUT
ICS840002-01
16-Lead TSSOP
4.4mm x 5.0mm x 0.92mm
package body
G Package
Top View
FEATURES
Two LVCMOS/LVTTL outputs @ 3.3V,
17
Ω typical output impedance
Selectable crystal oscillator interface
or LVCMOS/LVTTL single-ended input
Output frequency range: 56MHz - 175MHz
VCO range: 560MHz - 700MHz
Output skew: 12ps (maximum)
RMS phase jitter at 156.25MHZ (1.875MHz - 20MHz):
0.47ps (typical)
Phase noise:
Offset
Noise Power
100Hz ............... -97.4 dBc/Hz
1
kHz .............. -120.2 dBc/Hz
10
kHz .............. -127.6 dBc/Hz
100
kHz .............. -126.1 dBc/Hz
Full 3.3V or 3.3V core/2.5V output supply mode
-30°C to 85°C ambient operating temperature
Available in both standard and lead-free RoHS compliant
packages
Q0
Q1
OE
F_SEL1:0
nPLL_SEL
nXTAL_SEL
XTAL_IN
XTAL_OUT
TEST_CLK
MR
OSC
Phase
Detector
VCO
M = ÷25 (fixed)
F_SEL1:0
0 0 ÷4
0 1 ÷5
1 0 ÷10
1 1 ÷5
0
1
0
2
N
25MHz
Pullup
Pulldown
Pullup:Pullup
Pulldown
FREQUENCY SELECT FUNCTION TABLE
s
t
u
p
n
I
y
c
n
e
u
q
e
r
F
t
u
p
t
u
O
)
.
f
e
R
z
H
M
5
2
(
1
L
E
S
_
F0
L
E
S
_
Fe
u
l
a
V
r
e
d
i
v
i
D
Me
u
l
a
V
r
e
d
i
v
i
D
N
00
5
24
5
2
.
6
5
1
01
5
25
5
2
1
10
5
20
15
.
2
6
11
5
25
5
2
1
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