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843246AMILFT

Description
Clock Generator
CategoryThe embedded processor and controller    Microcontrollers and processors   
File Size215KB,15 Pages
ManufacturerIDT (Integrated Device Technology)
Environmental Compliance
Download Datasheet Parametric Compare View All

843246AMILFT Overview

Clock Generator

843246AMILFT Parametric

Parameter NameAttribute value
Is it Rohs certified?conform to
MakerIDT (Integrated Device Technology)
package instruction,
Reach Compliance Codecompliant
JESD-609 codee3
Humidity sensitivity level1
Terminal surfaceMatte Tin (Sn) - annealed
Base Number Matches1
PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS843246I
F
EMTO
C
LOCKS
™ C
RYSTAL
-
TO
-3.3V LVPECL
F
REQUENCY
S
YNTHESIZER W
/I
NTEGRATED
F
ANOUT
B
UFFER
F
EATURES
Six LVPECL outputs
Crystal oscillator interface
Output frequency range: 53.125MHz to 333.3333MHz
Crystal input frequency range: 25MHz to 33.333MHz
RMS phase jitter at 125MHz, using a 25MHz crystal
(1.875MHz to 20MHz): 0.41ps (typical)
Full 3.3V or 3.3V core, 2.5V output supply mode
-40°C to 85°C ambient operating temperature
Available in both standard and lead-free RoHS-compliant
packages
G
ENERAL
D
ESCRIPTION
The ICS843246I is a Crystal-to-3.3V LVPECL
Clock Synthesizer/Fanout Buffer designed for
HiPerClockS™
Fibre Channel and Gigabit Ethernet appli-
cations and is a member of the HiperClockS™
family of High Performance Clock Solutions
from ICS. The output frequency can be set using the fre-
quency select pins and a 25MHz crystal for Ethernet
frequencies, or a 26.5625MHz crystal for a Fibre Channel.
The low phase noise characteristics of the ICS843246I
make it an ideal clock for these demanding applications.
IC
S
S
ELECT
F
UNCTION
T
ABLE
Inputs
FB_SEL
0
0
0
0
1
1
1
1
N_SEL1
0
0
1
1
0
0
1
1
N_SEL0
0
1
0
1
0
1
0
1
M Divide
20
20
20
20
24
24
24
24
Function
N Divide
2
4
5
8
3
4
6
12
M/N
10
5
4
2.5
8
6
4
2
B
LOCK
D
IAGRAM
Q0
nQ0
PLL_BYPASS
Pullup
P
IN
A
SSIGNMENT
V
CCO
V
CCO
nQ2
Q2
nQ1
Q1
nQ0
Q0
PLL_BYPASS
V
CCA
V
CC
FB_SEL
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
Q3
nQ3
Q4
nQ4
Q5
nQ5
N_SEL1
V
EE
V
EE
N_SEL0
XTAL_OUT
XTAL_IN
Q1
1
XTAL_IN
XTAL_OUT
nQ1
OSC
PLL
0
Output
Divider
Q2
nQ2
Q3
nQ3
Q4
nQ4
Q5
nQ5
Feedback
Divider
FB_SEL
N_SEL1
N_SEL0
Pulldown
Pullup
Pullup
ICS843246I
24-Lead, 300-MIL SOIC
7.5mm x 15.33mm x 2.3mm
body package
M Package
Top View
24-Lead TSSOP
4.40mm x 7.8mm x 0.92mm
body package
G Package
Top View
The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on
initial product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications
without notice.
843246AMI
www.icst.com/products/hiperclocks.html
REV. A JUNE 16, 2006
1

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Is it Rohs certified? conform to incompatible incompatible conform to incompatible conform to conform to incompatible conform to
Maker IDT (Integrated Device Technology) IDT (Integrated Device Technology) IDT (Integrated Device Technology) IDT (Integrated Device Technology) IDT (Integrated Device Technology) IDT (Integrated Device Technology) IDT (Integrated Device Technology) IDT (Integrated Device Technology) IDT (Integrated Device Technology)
Reach Compliance Code compliant not_compliant not_compliant compliant not_compliant compliant compliant not_compliant compliant
JESD-609 code e3 e0 e0 e3 e0 e3 e3 e0 e3
Humidity sensitivity level 1 1 1 1 1 1 1 1 1
Terminal surface Matte Tin (Sn) - annealed Tin/Lead (Sn85Pb15) Tin/Lead (Sn85Pb15) Matte Tin (Sn) - annealed Tin/Lead (Sn85Pb15) Matte Tin (Sn) - annealed Matte Tin (Sn) - annealed Tin/Lead (Sn85Pb15) Matte Tin (Sn) - annealed
Base Number Matches 1 1 1 1 1 1 1 - -
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