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Integrated Device Technology Electronic Components Datasheet



ICS874003-04

PCI EXPRESS Jitter Attenuator


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ICS874003-04 pdf
PCI EXPRESS™ Jitter Attenuator
ICS874003-04
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DATA SHEET
General Description
The ICS874003-04 is a high performance
ICS Differential-to-LVDS Jitter Attenuator designed for use
HiPerClockS™ in PCI Express systems. In some PCI Express
systems, such as those found in desktop PCs, the PCI
ExpressTM clocks are generated from a low bandwidth,
high phase noise PLL frequency synthesizer. In these systems, a
jitter attenuator may be required to attenuate high frequency random
and deterministic jitter components from the PLL synthesizer and
from the system board. The ICS874003-04 has a bandwidth of
6.8MHz. The 6.8MHz provides a high bandwidth that can easily track
triangular spread profiles, while providing jitter attenuation.
The ICS874003-04 uses IDT’s 3rd Generation FemtoClock™ PLL
technology to achieve the lowest possible phase noise. The device is
packaged in a 20 Lead TSSOP package, making it ideal for use in
space constrained applications such as PCI Express add-in cards.
Features
Three differential LVDS output pairs
One differential clock input
CLK/nCLK can accept the following differential input levels:
LVPECL, LVDS, LVHSTL, HCSL, SSTL
Input frequency range: 98MHz to 128MHz
Output frequency range: 98MHz to 320MHz
VCO range: 490MHz - 640MHz
Supports PCI-Express Spread-Spectrum Clocking
High PLL bandwidth allows for better input tracking
Full 3.3V supply mode
0°C to 70°C ambient operating temperature
Available in both standard (RoHS 5) and lead-free (RoHS 6)
packages
F_SEL[2:0] Function Table
Inputs
F_SEL2 F_SEL1 F_SEL0
000
100
010
110
001
101
011
111
Outputs
QA[0:1], nQA[0:1] QB, nQB0
÷2 ÷2
÷5 ÷2
÷4 ÷2
÷2 ÷4
÷2 ÷5
÷5 ÷4
÷4 ÷5
÷4 ÷4
Pin Assignment
QA1
VDDO
QA0
nQA0
MR
F_SEL0
nc
VDDA
F_SEL1
VDD
1
2
3
4
5
6
7
8
9
10
20 nQA1
19 VDDO
18 QB0
17 nQB0
16 F_SEL2
15 OEB
14 GND
13 nCLK
12 CLK
11 OEA
ICS874003-04
20-Lead TSSOP
6.5mm x 4.4mm x 0.925mm package body
G Package
Top View
ICS874003AG-04 REVISION A NOVEMBER 4, 2009
1
©2009 Integrated Device Technology, Inc.



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ICS874003-04 pdf
ICS874003-04 Data Sheet
Block Diagram
OEA Pullup
F_SEL2:0 Pulldown
3
CLK Pulldown
nCLK Pullup
Phase
Detector
VCO
490 - 640MHz
MR Pulldown
OEB Pullup
M = ÷5 (fixed)
÷5
÷4
÷2 (default)
3
÷5
÷4
÷2 (default)
PCI EXPRESS™ JITTER ATTENUATOR
www.DataSheet4U.com
QA0
nQA0
QA1
nQA1
QB0
nQB0
ICS874003AG-04 REVISION A NOVEMBER 4, 2009
2
©2009 Integrated Device Technology, Inc.



Part Number ICS874003-04
Description PCI EXPRESS Jitter Attenuator
Maker Integrated Device Technology - Integrated Device Technology
Total Page 15 Pages
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ICS874003-04 pdf
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