ICS871004AGI-04LFT IDT, Integrated Device Technology Inc, ICS871004AGI-04LFT Datasheet

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ICS871004AGI-04LFT

Manufacturer Part Number
ICS871004AGI-04LFT
Description
IC JITTER ATTENUATOR 24-TSSOP
Manufacturer
IDT, Integrated Device Technology Inc
Series
HiPerClockS™r
Type
Jitter Attenuatorr
Datasheet

Specifications of ICS871004AGI-04LFT

Input
HCSL, LVDS, LVHSTL, LVPECL, SSTL
Output
PCI
Frequency - Max
640MHz
Voltage - Supply
3.135 V ~ 3.465 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
24-TSSOP
Frequency-max
640MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
871004AGI-04LFT
BW_SEL[1:0]
DIFFERENTIAL-TO-0.7V DIFFERENTIAL
PCI EXPRESS™ JITTER ATTENUATOR
B
The Preliminary Information presented herein represents a product in pre-production. The noted characteristics are based on initial product characterization
and/or qualification. Integrated Device Technology, Incorporated (IDT) reserves the right to change any circuitry or specifications without notice.
IDT
G
generated from a low bandwidth, highphase 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 ICS871004I-04 has 3 PLL
bandwidth modes: 200kHz, 400kHz and 800kHz. The 200kHz
mode will provide maximum jitter attenuation, but with higher
PLL tracking skew and spread spectrum modulation from the
motherboard synthesizer may be attenuated. The 400kHz
provides an intermediate bandwidth that can easily track tri-
angular spread profiles, while providing good jitter attenuation.
The 800kHz bandwidth provides the best tracking skew and
will pass most spread profiles, but the jitter attenuation will not
be as good as the lower bandwidth modes. The ICS871004I-
04 can be set for different modes using the F_SEL pins as
shown in Table 3C.
The ICS871004I-04 uses IDT’s 3
technology to achieve the lowest possible phase noise. The device
is packaged in a 24 Lead TSSOP package, making it ideal for
use in space constrained applications such as PCI Express add-
in cards.
HiPerClockS™
F_SEL[1:0]
IC S
LOCK
ENERAL
/ ICS
nCLK
IREF
CLK
MR
OE
0.7V DIFFERENTIAL JITTER ATTUNUATOR
Pullup
Pulldown
Pulldown
Pullup
Pulldown:Pullup
Pulldown
D
The ICS871004I-04 is a high perfor mance
Differential-to-0.7V Differential 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
IAGRAM
D
ESCRIPTION
Detector
2
2
Phase
rd
+
-
Control
Generation FemtoClock
Logic
÷5
490 - 640MHz
VCO
M
U
X
TM
PLL
0 0 ÷5
0 1 ÷4
1 0 ÷2
1 1 ÷1
(default)
1
Features
PLL B
Four 0.7V differential output pairs
One differential clock input
CLK and nCLK supports the following input types: LVPECL,
LVDS, LVHSTL, SSTL, HCSL
Output frequency range: 98MHz - 640MHz
Input frequency range: 98MHz - 128MHz
VCO range: 490MHz - 640MHz
Cycle-to-cycle jitter: 19ps (typical)
Additive phase jitter, RMS: 0.23ps (typical)
3.3V operating supply
Three bandwidth modes allow the system designer to make
jitter attenuation/tracking skew design trade-offs
-40°C to 85°C ambient operating temperature
Available in both standard (RoHS 5) and lead-free
(RoHS 6) packages
BW_SEL[1:0]
0 0 = PLL Bandwidth: ~200kHz
0 1 = PLL Bandwidth: ~400kHz (default)
1 0 = PLL Bandwidth: ~800kHz
1 1 = PLL BYPASS
ANDWIDTH
Q0
nQ0
Q1
nQ1
Q2
nQ2
Q3
nQ3
ICS871004AGI-04 REV A JANUARY 17, 2008
P
BW_SEL0
4.40mm x 7.8mm x 0.92mm
F_SEL0
ICS871004I-04
IN
IREF
GND
V
nQ0
nQ2
ICS871004I-04
V
V
PRELIMINARY
MR
OE
DDA
Q2
24-Lead TSSOP
DD
DD
A
G Package
package body
SSIGNMENT
Top View
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
Q0
V
Q1
nQ1
Q3
nQ3
BW_SEL1
F_SEL1
GND
GND
nCLK
CLK
DD

Related parts for ICS871004AGI-04LFT

ICS871004AGI-04LFT Summary of contents

Page 1

... PRELIMINARY ICS871004I- SSIGNMENT nQ0 2 23 nQ2 nQ1 IREF GND nQ3 BW_SEL1 8 BW_SEL0 17 F_SEL1 nQ0 GND DDA F_SEL0 GND nCLK DD nQ1 CLK ICS871004I-04 Q2 24-Lead TSSOP nQ2 4.40mm x 7.8mm x 0.92mm Q3 package body nQ3 G Package Top View ICS871004AGI-04 REV A JANUARY 17, 2008 ...

Page 2

... ICS871004I-04 DIFFERENTIAL-TO-0.7V DIFFERENTIAL PCI EXPRESS™ JITTER ATTENUATOR ABLE IN ESCRIPTIONS ABLE IN HARACTERISTICS IDT ™ / ICS ™ 0.7V DIFFERENTIAL JITTER ATTUNUATOR ICS871004AGI-04 REV A JANUARY 17, 2008 PRELIMINARY ...

Page 3

... ICS871004I-04 DIFFERENTIAL-TO-0.7V DIFFERENTIAL PCI EXPRESS™ JITTER ATTENUATOR T 3A ABLE UTPUT NABLE UNCTION 3B. PLL B /PLL B ABLE ANDWIDTH YPASS 3C ABLE REQUENCY ELECT UNCTION IDT ™ / ICS ™ 0.7V DIFFERENTIAL JITTER ATTUNUATOR ABLE C ONTROL ABLE ICS871004AGI-04 REV A JANUARY 17, 2008 PRELIMINARY ...

Page 4

... Exposure to absolute maximum rating conditions for extended periods may affect product reliability 3.3V±10 DDA 3.3V±10 DDA 3.3V±10 -40° DDA -40°C 85° – -40°C 85° 85° ICS871004AGI-04 REV A JANUARY 17, 2008 PRELIMINARY µ A µ A µ A µ µ A µ A µ A µ ...

Page 5

... ICS871004I-04 DIFFERENTIAL-TO-0.7V DIFFERENTIAL PCI EXPRESS™ JITTER ATTENUATOR ABLE HARACTERISTICS IDT ™ / ICS ™ 0.7V DIFFERENTIAL JITTER ATTUNUATOR = 3.3V±10 -40°C 85° DDA ICS871004AGI-04 REV A JANUARY 17, 2008 PRELIMINARY ...

Page 6

... Additive Phase Jitter (12kHz to 20MHz) = 0.23ps typical FFSET ROM ARRIER REQUENCY Z meets the noise floor of what is shown, but can actually be lower. The phase noise is dependant on the input source and measurement equipment. 6 PRELIMINARY @ 100MHz ) ICS871004AGI-04 REV A JANUARY 17, 2008 ...

Page 7

... EASUREMENT Measurement 100 Point nCLK 2pF CLK Measurement 100 Point GND 2pF - TBD D IRCUIT IFFERENTIAL t ➤ cycle n+1 t cycle n+1 D IFFERENTIAL T M IME ATCHING 7 PRELIMINARY I NFORMATION Cross Points NPUT EVEL EASUREMENT OINTS FOR UTY ICS871004AGI-04 REV A JANUARY 17, 2008 V CMR /P YCLE ERIOD ...

Page 8

... OINTS FOR BSOLUTE IFFERENTIAL EASUREMENT OINTS FOR IDT ™ / ICS ™ 0.7V DIFFERENTIAL JITTER ATTUNUATOR M I EASUREMENT NFORMATION ROSS OINT WING IFFERENTIAL INGBACK EASUREMENT 8 PRELIMINARY , CONTINUED EASUREMENT OINTS FOR ISE ALL OINTS FOR ELTA ROSS OINT ICS871004AGI-04 REV A JANUARY 17, 2008 IME ...

Page 9

... For example, if the input DD clock swing is only 2.5V and V and R2/R1 = 0.609. VDD R1 1K Single Ended Clock Input V_REF C1 0. INGLE NDED IGNAL RIVING 9 PRELIMINARY 3. . DDA . IGURE OWER UPPLY ILTERING : O UTPUTS = 3.3V, V_REF should be 1.25V DD CLK nCLK D I IFFERENTIAL NPUT ICS871004AGI-04 REV A JANUARY 17, 2008 ...

Page 10

... RIVEN BY A RIVER Ohm LVDS_Driv er R1 100 Ohm 3D CLK/nCLK LOCK NPUT D 3.3V LVDS D RIVEN BY A RIVER 2. 120 120 CLK nCLK R1 R2 120 120 3F CLK/nCLK LOCK NPUT D 2.5V SSTL D RIVEN BY A RIVER ICS871004AGI-04 REV A JANUARY 17, 2008 PRELIMINARY 3.3V CLK nCLK Receiv er 3.3V HiPerClockS ...

Page 11

... IDT ™ / ICS ™ 0.7V DIFFERENTIAL JITTER ATTUNUATOR F 4A IGURE ECOMMENDED ERMINATION and receiver on the same PCB. All traces should all be 50Ù impedance IGURE ECOMMENDED ERMINATION 11 PRELIMINARY ICS871004AGI-04 REV A JANUARY 17, 2008 ...

Page 12

... Multi-Layer PCB, JEDEC Standard Test Boards T C RANSISTOR OUNT The transistor count for ICS871004I-04 is: 1395 IDT ™ / ICS ™ 0.7V DIFFERENTIAL JITTER ATTUNUATOR R I ELIABILITY NFORMATION 24 L TSSOP EAD by Velocity (Meters per Second 82.3°C/W 12 PRELIMINARY 1 2.5 78°C/W 75.9°C/W ICS871004AGI-04 REV A JANUARY 17, 2008 ...

Page 13

... ICS871004I-04 DIFFERENTIAL-TO-0.7V DIFFERENTIAL PCI EXPRESS™ JITTER ATTENUATOR ACKAGE UTLINE UFFIX FOR IDT ™ / ICS ™ 0.7V DIFFERENTIAL JITTER ATTUNUATOR TSSOP EAD ABLE ACKAGE IMENSIONS ° Reference Document: JEDEC Publication 95, MO-153 13 PRELIMINARY ° ICS871004AGI-04 REV A JANUARY 17, 2008 ...

Page 14

... IDT does not authorize or warrant any IDT product for use in life support devices or critical medical instruments. IDT ™ / ICS ™ 0.7V DIFFERENTIAL JITTER ATTUNUATOR " " " " " " ° & ° ° & ° ICS871004AGI-04 REV A JANUARY 17, 2008 PRELIMINARY ° ° ° ° ...

Page 15

ICS871004I-04 DIFFERENTIAL-TO-0.7V DIFFERENTIAL PCI EXPRESS™ JITTER ATTENUATOR Innovate with IDT and accelerate your future networks. Contact: www.IDT.com For Sales 800-345-7015 408-284-8200 Fax: 408-284-2775 Corporate Headquarters Integrated Device Technology, Inc. 6024 Silver Creek Valley Road San Jose, CA 95138 United States ...

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