Integrated
Circuit
Systems, Inc.
ICS843001I-22
F
EMTO
C
LOCKS
™C
RYSTAL
/LVCMOS-
TO
-
3.3V, 2.5V LVPECL F
REQUENCY
S
YNTHESIZER
F
EATURES
• One 3.3V or 2.5V LVPECL output pair and
one LVCMOS/LVTTL output
• Selectable crystal oscillator interface
or LVCMOS/LVTTL single-ended input
• VCO range: 490MHz - 640MHz
• Output frequency range: 490MHz - 640MHz
• Supports the following applications:
SONET, Ethernet, Fibre Channel, Serial ATA, and HDTV
• RMS phase jitter @ 125MHz (1.875MHz - 20MHz):
0.5ps (typical)
• Full 3.3V or 2.5V supply modes
• -40°C to 85°C ambient operating temperature
G
ENERAL
D
ESCRIPTION
The ICS843001I-22 is a a highly versatile, low
phase noise LVPECL/LVCMOS Synthesizer
HiPerClockS™
which can generate low jitter reference clocks for
a variety of communications applications and is
a member of the HiPerClocks
TM
family of high
performance clock solutions from ICS. The dual
crystal interface allows the synthesizer to support up to two
communications standards in a given application (i.e. 1GB
Ethernet with a 25MHz crystal and 1Gb Fibre Channel
using a 25.5625MHz cr ystal). The r ms phase jitter
performance is typically less than 1ps, thus making the
device acceptable for use in demanding applications such
as OC48 SONET and 10Gb Ethernet. The ICS843001I-22
is packaged in a small 24-pin TSSOP package.
IC
S
C
ONTROL
I
NPUT
F
UNCTION
T
ABLE
Control Input
OE
0
1
FLOAT
Q/nQ
High-Z
High-Z
Active
Outputs
REF_OUT
High-Z
Active
High-Z
• Available in both, Standard and RoHS/Lead-Free
compliant packages
P
IN
A
SSIGNMENT
V
CCO
_
LVCMOS
N0
N1
N2
V
CCO
_
LVPECL
Q
nQ
V
EE
V
CCA
V
CC
XTAL_OUT1
XTAL_IN1
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
REF_OUT
V
EE
OE
M2
M1
M0
MR
SEL1
SEL0
CLK
XTAL_IN0
XTAL_OUT0
B
LOCK
D
IAGRAM
3
N2:N0
SEL0
Pulldown
SEL1
Pulldown
ICS843001I-22
N
000
001
010
011
÷1
÷2
÷3
÷4
(default)
÷5
÷6
÷8
÷10
nQ
XTAL_IN0
OSC
XTAL_OUT0
00
11
24-Lead TSSOP
4.40mm x 7.8mm x 0.92mm
package body
G Package
Top View
Q
XTAL_IN1
OSC
XTAL_OUT1
Pulldown
01
Phase
Detector
VCO
490MHz -640MHz
10
01
00
100
101
110
111
CLK
10
11
000
001
010
011
100
101
M
÷18
÷22
÷24
÷25
÷32
(default)
÷40
MR
M2:M0
Pulldown
3
REF_OUT
OE
Pullup/Pulldown
843001AGI-22
www.icst.com/products/hiperclocks.html
1
REV. A AUGUST 1, 2005
ICS [ INTEGRATED CIRCUIT SYSTEMS ]
