ICS814252CKI-02LFT IDT, Integrated Device Technology Inc, ICS814252CKI-02LFT Datasheet

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ICS814252CKI-02LFT

Manufacturer Part Number
ICS814252CKI-02LFT
Description
IC VCXO/FEMTOCLK 2LVDS 32-VFQFPN
Manufacturer
IDT, Integrated Device Technology Inc
Series
HiPerClockS™, FemtoClock®r
Type
Frequency Translator, Jitter Attenuator, Voltage Controlled Crystal Oscillator (VCXO)r
Datasheet

Specifications of ICS814252CKI-02LFT

Pll
Yes
Input
HCSL, LVDS, LVHSTL, LVPECL, SSTL
Output
LVDS
Number Of Circuits
1
Ratio - Input:output
3:2
Differential - Input:output
Yes/Yes
Frequency - Max
312.5MHz
Divider/multiplier
Yes/Yes
Voltage - Supply
3.135 V ~ 3.465 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
32-VFQFN
Frequency-max
312.5MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
814252CKI-02LFT
VCXO JITTER ATTENUATOR &
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
and frequency translation. The device contains two internal
frequency multiplication stages that are cascaded in series.
The first stage is a VCXO PLL that is optimized to provide
reference clock jitter attenuation. The second stage is a
FemtoClock™ frequency multiplier that provides the low jitter,
high frequency Ethernet output clock that easily meets Gigabit
and 10 Gigabit Ethernet jitter requirements. Pre-divider and
output divider multiplication ratios are selected using device
selection control pins. The multiplication ratios are optimized
to support most common clock rates used in PDH, SONET
and Ethernet applications. The VCXO requires the use of an
external, inexpensive pullable crystal. The VCXO uses external
passive loop filter components which allows configuration of
the PLL loop bandwidth and damping characteristics. The
device is packaged in a space-saving 32-VFQFN package and
supports industrial temperature range.
P
HiPerClockS™
FEMTOCLOCK™ MULTIPLIER
IC S
IN
ENERAL
RESERVED
/ ICS
CLK_SEL
A
SSIGNMENT
GND
GND
ISET
LF1
LF0
V
VCXO JITTER ATTENUATOR/MULTIPLIER
DD
The ICS814252I-02 is a member of the
HiperClockS™ family of high performance clock
solutions from IDT. The ICS814252I-02 is a PLL
based synchronous multiplier that is optimized for
PDH or SONET to Ethernet clock jitter attenuation
5mm x 5mm x 0.925 package body
D
1
2
3
4
5
6
7
8
ESCRIPTION
32 31 30 29 28 27 26 25
9 10 11 12 13 14 15 16
ICS814252I-02
32-Lead VFQFN
K Package
Top View
24
23
22
21
20
19
18
17
GND
nQB
QB
V
nQA
QA
GND
ODASEL_0
DDO
1
F
• Two LVDS outputs
• VCXO PLL bandwidth can be optimized for jitter attenuation
• FemtoClock VCO frequency: 625MHz
• 3.3V supply voltage
Each output supports independent frequency selection at
25MHz, 125MHz, 156.25MHz and 312.5MHz
Two differential inputs support the following input types:
LVPECL, LVDS, LVHSTL, SSTL, HCSL
Accepts input frequencies from 8kHz to 155.52MHz including
8kHz, 1.544MHz, 2.048MHz, 19.44MHz, 25MHz, 77.76MHz,
125MHz and 155.52MHz
Attenuates the phase jitter of the input clock by using a low-
cost pullable fundamental mode VCXO crystal
and reference tracking
FemtoClock frequency multiplier provides low jitter, high
frequency output
Absolute pull range: 50ppm
RMS phase jitter @ 125MHz, using a 25MHz crystal
(10kHz – 20MHz): 1.2ps (typical)
-40°C to 85°C ambient operating temperature
Available in both standard (RoHS 5) and lead-free (RoHS 6)
packages
EATURES
ICS814252CKI-02 REV. A OCTOBER 5, 2007
using external loop filter connection
ICS814252I-02
PRELIMINARY

Related parts for ICS814252CKI-02LFT

ICS814252CKI-02LFT Summary of contents

Page 1

... Available in both standard (RoHS 5) and lead-free (RoHS 6) packages 24 GND 23 nQB DDO 20 nQA GND 17 ODASEL_0 1 PRELIMINARY ICS814252I-02 using external loop filter connection ICS814252CKI-02 REV. A OCTOBER 5, 2007 ...

Page 2

... IDT ™ / ICS ™ VCXO JITTER ATTENUATOR/MULTIPLIER Loop Filter 25MHz Phase Detector VCXO Charge Pump VCXO Feedback Divider ÷3125 VCXO Jitter Attenuation PLL 2 PRELIMINARY Output Divider nQA ODASEL_[1:0] FemtoClock PLL 625MHz Output Divider nQB nQB ODBSEL_[1:0] ICS814252CKI-02 REV. A OCTOBER 5, 2007 ...

Page 3

... ICS814252I-02 VCXO JITTER ATTENUATOR & FEMTOCLOCK™ MULTIPLIER ABLE IN ESCRIPTIONS ABLE IN HARACTERISTICS IDT ™ / ICS ™ VCXO JITTER ATTENUATOR/MULTIPLIER ICS814252CKI-02 REV. A OCTOBER 5, 2007 PRELIMINARY kΩ kΩ ...

Page 4

... ICS814252I-02 VCXO JITTER ATTENUATOR & FEMTOCLOCK™ MULTIPLIER T 3A ABLE RE IVIDER UNCTION ABLE 3B ABLE UTPUT IVIDER UNCTION IDT ™ / ICS ™ VCXO JITTER ATTENUATOR/MULTIPLIER ABLE PRELIMINARY ICS814252CKI-02 REV. A OCTOBER 5, 2007 ...

Page 5

... ICS814252I-02 VCXO JITTER ATTENUATOR & FEMTOCLOCK™ MULTIPLIER T 3C ABLE REQUENCY UNCTION ABLE IDT ™ / ICS ™ VCXO JITTER ATTENUATOR/MULTIPLIER PRELIMINARY ICS814252CKI-02 REV. A OCTOBER 5, 2007 ...

Page 6

... DC Characteristics or AC Characteristics is not implied. Exposure to absolute maximum rating conditions for ex- 37°C/W (0 mps) tended periods may affect product reliability 3.3V±5 DDO DDX 3.3V±5%, T HARACTERISTICS DD DDO DDX PRELIMINARY = -40°C 85° – -40°C 85° ICS814252CKI-02 REV. A OCTOBER 5, 2007 µ A µ A µ A µ A ...

Page 7

... ABLE HARACTERISTICS Δ Δ ABLE HARACTERISTICS Ø IDT ™ / ICS ™ VCXO JITTER ATTENUATOR/MULTIPLIER , 3.3V±5 DDO DDX 3.3V±5 -40° DDO DDX 3.3V±5 -40°C 85° DDO DDX – -40°C 85° 85° ICS814252CKI-02 REV. A OCTOBER 5, 2007 PRELIMINARY µ A µ A µ ...

Page 8

... QA 20 UTPUT out DC Input out V /Δ IFFERENTIAL 8 PRELIMINARY I NFORMATION Cross Points NPUT EVEL tsk(o) KEW PERIOD t PW odc = x 100% t PERIOD /tP UTY YCLE ULSE IDTH ERIOD V DD LVDS 100 UTPUT OLTAGE ETUP ICS814252CKI-02 REV. A OCTOBER 5, 2007 V CMR out V /Δ out ...

Page 9

... R2/R1 = 0.609. VDD R1 1K Single Ended Clock Input V_REF nCLKx C1 0. INGLE NDED IGNAL RIVING 9 PRELIMINARY 3. .01µF 10Ω V DDX 10Ω .01µF 10µF V DDA .01µF 10µ IGURE OWER UPPLY ILTERING = 3.3V, V_REF should be 1.25V DD CLKx I IFFERENTIAL NPUT ICS814252CKI-02 REV. A OCTOBER 5, 2007 ...

Page 10

ICS813252I-02 VCXO JITTER ATTENUATOR & FEMTOCLOCK™ MULTIPLIER IFFERENTIAL LOCK NPUT NTERFACE The CLK /nCLK accepts LVDS, LVPECL, LVHSTL, SSTL, HCSL and other differential signals. Both signals must meet the V V input requirements. Figures 3A to ...

Page 11

... Note on the Surface Mount Assembly of Amkor’s Thermally/ Electrically Enhance Leadfame Base Package, Amkor Technology. EXPOSED HEAT SLUG THERMAL VIA XPOSED AD HERMAL ELEASE 11 : UTPUTS SOLDER PIN LAND PATTERN PIN PAD (GROUND PAD) – ATH IDE IEW RAWING NOT TO CALE ICS814252CKI-02 REV. A OCTOBER 5, 2007 PRELIMINARY ) ...

Page 12

... IDT ™ / ICS ™ VCXO JITTER ATTENUATOR/MULTIPLIER input. For a multiple LVDS outputs buffer, if only partial outputs are used recommended to terminate the unused outputs. LVDS R1 100 100 Ohm Differential Transmission Line LVDS D IGURE YPICAL RIVER 12 PRELIMINARY 3. ERMINATION ICS814252CKI-02 REV. A OCTOBER 5, 2007 ...

Page 13

... ABLE k ( Ω Ω Ω Ω Ω µ ± ± ± dependant on the TUNE 25MHz C TUNE k ( Ω Ω Ω Ω Ω µ ° ICS814252CKI-02 REV. A OCTOBER 5, 2007 PRELIMINARY in the Crystal LF0 LF1 ISET R SET XTAL_IN XTAL_OUT ...

Page 14

... DDX_MAX DDA_MAX DDO_MAX TM devices is 125°C. * Pd_total + 32-L VFQFN EAD ORCED ONVECTION θ θ θ θ θ vs. 0 Air Flow (Meters per Second) JA 37.0°C/W 14 PRELIMINARY must be used. Assuming no air 2.5 32.4°C/W 29.0°C/W ICS814252CKI-02 REV. A OCTOBER 5, 2007 ...

Page 15

... The transistor count for ICS814252I-02 is: 6579 IDT ™ / ICS ™ VCXO JITTER ATTENUATOR/MULTIPLIER R I ELIABILITY NFORMATION VFQFN EAD θ θ θ θ θ vs. 0 Air Flow (Meters per Second 37.0°C/W 15 PRELIMINARY 1 2.5 32.4°C/W 29.0°C/W ICS814252CKI-02 REV. A OCTOBER 5, 2007 ...

Page 16

... The pin count and pinout are shown on the front page. The package dimensions are in Table 8 below ABLE S Y Reference Document: JEDEC Publication 95, MO-220 IDT ™ / ICS ™ VCXO JITTER ATTENUATOR/MULTIPLIER 32 L VFQFN UFFIX FOR EAD D ACKAGE IMENSIONS PRELIMINARY ICS814252CKI-02 REV. A OCTOBER 5, 2007 ...

Page 17

... IDT does not authorize or warrant any IDT product for use in life support devices or critical medical instruments. IDT ™ / ICS ™ VCXO JITTER ATTENUATOR/MULTIPLIER " " " " " " ° & ° ° & ° ICS814252CKI-02 REV. A OCTOBER 5, 2007 PRELIMINARY ° ° ° ° ...

Page 18

ICS814252I-02 VCXO JITTER ATTENUATOR & FEMTOCLOCK™ MULTIPLIER 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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