ICS874003-04 Datasheet, PDF (1/15 Pages) Integrated Device Technology – PCI EXPRESS™ Jitter Attenuator

PCI EXPRESS™ Jitter Attenuator
ICS874003-04
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
Express^TM 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 3^rd 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
0
0
0
1
0
0
0
1
0
1
1
0
0
0
1
1
0
1
0
1
1
1
1
1
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 1
VDDO 2
QA0 3
nQA0 4
MR 5
F_SEL0 6
nc 7
VDDA 8
F_SEL1 9
V_DD 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.