si5368 Silicon Laboratories, si5368 Datasheet

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si5368

Manufacturer Part Number
si5368
Description
Any-rate Precision Clock Multiplier/jitter Attenuator
Manufacturer
Silicon Laboratories
Datasheet

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A
Description
The Si5368 is a jitter-attenuating precision clock multiplier for
applications requiring sub 1 ps rms jitter performance. The
Si5368 accepts four clock inputs ranging from 2 kHz to
710 MHz and generates five clock outputs ranging from
2 kHz to 945 MHz and select frequencies to 1.4 GHz. The
device
combination across this operating range. The outputs are
divided down separately from a common source. The Si5368
input clock frequency and clock multiplication ratio are
programmable through an I
based on Silicon Laboratories' 3rd-generation DSPLL
technology, which provides any-rate frequency synthesis and
jitter attenuation in a highly integrated PLL solution that
eliminates the need for external VCXO and loop filter
components. The DSPLL loop bandwidth is digitally
programmable, providing jitter performance optimization at
the application level. Operating from a single 1.8 or 2.5 V
supply, the Si5368 is ideal for providing clock multiplication
and jitter attenuation in high performance timing applications.
Applications
Preliminary Rev. 0.4 2/08
NY
SONET/SDH OC-48/STM-16/OC-192/STM-64 line cards
GbE/10GbE, 1/2/4/8/10GFC line cards
ITU G.709 and custom FEC line cards
Wireless basestations
Data converter clocking
xDSL
SONET/SDH + PDH clock synthesis
Test and measurement
Synchronous Ethernet
Broadcast video
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.
-R
LOL/LOS/FOS Alarms
provides
FSYNC Realignment
Latency Control
Device Interrupt
A TE
Clock Select
I
Rate Select
2
C/SPI Port
CKIN1
CKIN2
CKIN3
CKIN4
virtually
P
R E C I S I O N
2
C or SPI interface. The Si5368 is
any
÷ N31
÷ N32
÷ N33
÷ N34
Control
frequency
Copyright © 2008 by Silicon Laboratories
C
Xtal or Refclock
L O C K
translation
®
M
DSPLL
÷ N2
U L T I P L I E R
Features
®
Output Clock 2
Input Clock 3
Input Clock 4
Generates any frequency from 2 kHz to 945 MHz
and select frequencies to 1.4 GHz from an input
frequency of 2 kHz to 710 MHz
Ultra-low jitter clock outputs w/jitter generation as
low as 0.3 ps rms (50 kHz–80 MHz)
Integrated loop filter with selectable loop bandwidth
(60 Hz to 8.4 kHz)
Meets OC-192 GR-253-CORE jitter specifications
Four clock inputs w/manual or automatically
controlled hitless switching
Five clock outputs with selectable signal format
(LVPECL, LVDS, CML, CMOS)
SONET frame sync switching and regeneration
Support for ITU G.709 and custom FEC ratios
(255/238, 255/237, 255/236)
LOL, LOS, FOS alarm outputs
Digitally-controlled output phase adjust
I
On-chip voltage regulator for 1.8 V ±5% or 2.5 V
±10% operation
Small size: 14 x 14 mm 100-pin TQFP
Pb-free, RoHS compliant
2
C or SPI programmable settings
NI_HS
P
÷ NCI_LS
÷ NCI_LS
÷ NCI_LS
÷ NCI_LS
÷ NC5_LS
R E L I M I N A R Y
/J
I T T E R
A
Si5368
T T E N U A T O R
VDD (1.8 or 2.5 V)
GND
D
CKOUT1
CKOUT2
CKOUT3
CKOUT4
CKOUT5/FS_OUT
A TA
S
H E E T
Si5368

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si5368 Summary of contents

Page 1

... The Si5368 is a jitter-attenuating precision clock multiplier for applications requiring sub 1 ps rms jitter performance. The Si5368 accepts four clock inputs ranging from 2 kHz to 710 MHz and generates five clock outputs ranging from 2 kHz to 945 MHz and select frequencies to 1.4 GHz. The ...

Page 2

... Si5368 Table 1. Performance Specifications (V = 1.8 ±5% or 2.5 V ±10 – º Parameter Symbol Temperature Range T Supply Voltage V Supply Current I DD Input Clock Frequency CK (CKIN1, CKIN2, CKIN3, CKIN4) Input Clock Frequency CK (CKIN3, CKIN4 used as FSYNC inputs) Output Clock Frequency CK (CKOUT1, CKOUT2, CKOUT3, CKOUT4, CKOUT5 ...

Page 3

... IN OUT 100 Hz offset 1 kHz offset 10 kHz offset 100 kHz offset 1 MHz offset Phase Noise @ 100 kHz Offset Max spur @ > < 100 MHz) Still Air JA Preliminary Rev. 0.4 Si5368 Min Typ Max Unit 40 — — — – 1.42 — ...

Page 4

... Si5368 Table 2. Absolute Maximum Ratings Parameter DC Supply Voltage LVCMOS Input Voltage Junction Temperature Storage Temperature Range ESD HBM Tolerance (100 pF, 1.5 kΩ); All pins except CKIN+/CKIN– ESD MM Tolerance; All pins except CKIN+/CKIN– ESD HBM Tolerance (100 pF, 1.5 kΩ); CKIN+/CKIN– ...

Page 5

... Brick Wall, 100 Hz to 100 MHz SONET_OC48, 12 kHz to 20 MHz SONET_OC192_A, 20 kHz to 80 MHz SONET_OC192_B, 4 MHz to 80 MHz SONET_OC192_C, 50 kHz to 80 MHz Brick Wall, 800 MHz Preliminary Rev. 0.4 100000 1000000 10000000 Jitter, RMS 1,279 fs 315 fs 335 fs 194 fs 318 fs 343 fs Si5368 100000000 5 ...

Page 6

... Input Clock V = 3.3 V Sources* DD 130 Ω 130 Ω 82 Ω 82 Ω INC DEC Rate Control Mode (H) Reset *Note: Figure 3. Si5368 Typical Application Circuit (SPI Control Mode Option 1: Option 2: Ferrite Crystal Ext. Refclk 1 µF Bead C 0.1 µF 0.1 µF 1–9 0.1 µF CKIN1+ CKOUT1+ CKIN1– ...

Page 7

... The Si5368 is a jitter-attenuating precision clock multiplier for applications requiring sub 1 ps rms jitter performance. The Si5368 accepts four clock inputs ranging from 2 kHz to 710 MHz and generates five clock outputs ranging from 2 kHz to 945 MHz and select frequencies to 1.4 GHz. The device provides virtually any frequency translation combination across this operating range ...

Page 8

... Pin # Pin Name I 20, NC 22, 23, 24, 25, 37, 47, 48, 50, 51, 52, 53, 56, 66, 67, 72, 73, 74, 75, 80, 85 RST I Note: Internal register names are indicated by underlined italics, e.g. INT_PIN. See Si5368 Register Map Si5368 ...

Page 9

... C1B O 10 C2B O 11 C3B O 12 INT_ALM O Note: Internal register names are indicated by underlined italics, e.g. INT_PIN. See Si5368 Register Map. Supply The device operates from a 1.8 or 2.5 V supply. Bypass capaci- tors should be associated with the following V Pins Bypass Cap 5, 6 0.1 µF 15 0.1 µ ...

Page 10

... CKIN4– 32 RATE0 I 42 RATE1 Note: Internal register names are indicated by underlined italics, e.g. INT_PIN. See Si5368 Register Map. 10 Signal Level LVCMOS Input Clock Select/CKIN3 or CKIN4 Active Clock Indicator. Input: If manual clock selection is chosen, and if CKSEL_PIN = 1, the CKSEL pins control clock selection and the CKSEL_REG bits are ignored ...

Page 11

... CKIN1– 49 LOL O 54 DEC I Note: Internal register names are indicated by underlined italics, e.g. INT_PIN. See Si5368 Register Map. MULTI Clock Input 2. Differential input clock. This input can also be driven with a sin- gle-ended signal. MULTI Clock Input 3. Differential clock input. This input can also be driven with a sin- gle-ended signal ...

Page 12

... A2_SS I Note: Internal register names are indicated by underlined italics, e.g. INT_PIN. See Si5368 Register Map. 12 Signal Level LVCMOS Coarse Latency Increment. A pulse on this pin increases the input to output device latency by 1/fOSC (approximately 200 ps). Detailed operations, restric- tions, and timing characteristics for this pin may be found in the Any-Rate Precision Clock Family Reference Manual ...

Page 13

... CKOUT4– CKOUT4+ GND PAD GND PAD GND Note: Internal register names are indicated by underlined italics, e.g. INT_PIN. See Si5368 Register Map. LVCMOS Serial Data In. In SPI microprocessor control mode (CMODE = 1), this pin functions as the serial data input microprocessor control mode (CMODE = 0), this pin is ignored ...

Page 14

... Output Clock Number Frequency Range Si5368A-C-GQ 2 kHz–945 MHz 970–1134 MHz 1.213–1.417 GHz Si5368B-C-GQ 2 kHz–808 MHz Si5368C-C-GQ 2 kHz–346 MHz 14 Package ROHS6, Pb-Free 100-Pin TQFP 100-Pin TQFP 100-Pin TQFP Preliminary Rev. 0.4 ...

Page 15

... Package Outline: 100-Pin TQFP Figure 4 illustrates the package details for the Si5368. Table 4 lists the values for the dimensions shown in the illustration. Figure 4. 100-Pin Thin Quad Flat Package (TQFP) Table 4. Dimension Min Nom A — A1 0.05 A2 0.95 1.00 b 0.17 0.22 c 0.09 D 16.00 BSC. D1 14.00 BSC. D2 3.85 4.00 e 0.50 BSC. Notes: 1 ...

Page 16

... Si5368 5. Recommended PCB Layout 16 Figure 5. PCB Land Pattern Diagram Preliminary Rev. 0.4 ...

Page 17

... Notes (Card Assembly No-Clean, Type-3 solder paste is recommended. 2. The recommended card reflow profile is per the JEDEC/IPC J-STD-020C specification for Small Body Components. Preliminary Rev. 0.4 MIN MAX 0.50 BSC. 15.40 REF. 15.40 REF. 3.90 4.10 3.90 4.10 13.90 — 13.90 — — 0.30 1.50 REF. — 16.90 — 16.90 0.15 REF — 1.00 Si5368 17 ...

Page 18

... Revision 0.3 to Revision 0.4 Changed V specification for 1 Updated Table 1 on page 2. Updated Table 2 on page 4. Added table under Figure 1 on page 5. Updated "1. Functional Description" on page 7. Clarified "2. Pin Descriptions: Si5368" on page 8 including correcting pin assignments for RATE0 and RATE1. 18 Preliminary Rev. 0.4 ...

Page 19

... N : OTES Preliminary Rev. 0.4 Si5368 19 ...

Page 20

... Si5368 C I ONTACT NFORMATION Silicon Laboratories Inc. 400 West Cesar Chavez Austin, TX 78701 Tel: 1+(512) 416-8500 Fax: 1+(512) 416-9669 Toll Free: 1+(877) 444-3032 Email: Clockinfo@silabs.com Internet: www.silabs.com The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice. ...

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