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Integrated Device Technology Electronic Components Datasheet



ICS874003-05

PCI EXPRESS JITTER ATTENUATOR


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ICS874003-05 pdf
PCI Express™ Jitter Attenuator
ICS874003-05
DATASHEET
General Description
The ICS874003-05 is a high performance Differential-to-LVDS Jitter
Attenuator designed for use in PCI Express systems. In some PCI
Express systems, such as those found in desktop PCs, the PCI
Express 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 ICS874003-05 has a bandwidth of 6.2MHz
with <1dB peaking, easily meeting PCI Express Gen2 PLL
requirements.
The ICS874003-05 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
PCI Express (2.5 Gb/s) and Gen 2 (5 Gb/S) jitter compliant
0°C to 70°C ambient operating temperature
Full 3.3V operating supply
Available in lead-free (RoHS 6) packages
F_SEL[2:0] Function Table
Inputs
F_SEL2 F_SEL1 F_SEL0
000
(default) (default) (default)
100
010
110
001
101
011
111
Outputs
QA[0:1],
nQA[0:1]
QB0, 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
ICS874003-05
20-Lead TSSOP
6.5mm x 4.4mm x 0.925mm package body
G Package
Top View
ICS874003BG-05 REVISION B MARCH 21, 2014
1
©2014 Integrated Device Technology, Inc.



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ICS874003-05 pdf
ICS874003-05 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
QA0
nQA0
QA1
nQA1
QB0
nQB0
ICS874003BG-05 REVISION B MARCH 21, 2014
2
©2014 Integrated Device Technology, Inc.



Part Number ICS874003-05
Description PCI EXPRESS JITTER ATTENUATOR
Maker Integrated Device Technology - Integrated Device Technology
Total Page 18 Pages
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