sy89482l Micrel Semiconductor, sy89482l Datasheet

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sy89482l

Manufacturer Part Number
sy89482l
Description
Sy89482l 3.3v, 622mhz To 694mhz Cml Precision Jitter Attenuator With Internal Termination
Manufacturer
Micrel Semiconductor
Datasheet
April 2008
General Description
The SY89482L is a 3.3V, fully differential CML jitter
attenuator that accepts a noisy clock between 622MHz
and 694MHz, and provides an ultra-low jitter of the input
clock signal. Output jitter is typically 1ps
SY89482L includes a 1kHz to 10kHz programmable
loop bandwidth so it can accommodate different jitter
attenuation applications and PLL requirements.
The differential input includes Micrel’s unique, 3-pin
input termination architecture that interfaces to LVPECL,
LVDS or CML differential signals, (AC-coupled or DC-
coupled) as small as 100mV without any level-shifting or
termination resistor networks in the signal path. For AC-
coupled input interface applications, an on-board output
reference voltage (V
The outputs are compatible with 400mV typical swing
into 50Ω loads, with rise/fall times guaranteed to be less
than 250ps
The SY89482L operates at 3.3V ±10% supply and the
output can accommodate 1.8V-3.3V operation with the
dedicated output supply. The part is guaranteed to
operate over the full industrial temperature range
(–40°C to +85°C). The SY89482L is part of Micrel’s
Precision Edge
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Precision Edge is a registered trademark of Micrel, Inc.
MLF and MicroLeadFrame are registered trademarks of Amkor Technology.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
®
product line.
REF-AC
) is provided to bias the V
RMS
. The
T
pin.
Features
Applications
input (LVDS, LVPECL, and CML)
frequency calibration.
reflections
Input frequency matched, low-jitter output
I/O frequency range: 622MHz – 694MHz
Ultra-low phase noise and jitter performance
– <2ps
CML-compatible output signal
3-pin input accepts an AC- or DC-coupled differential
Unique, Auto-Tune circuitry enables precision
Internal source termination to minimize round-trip
Programmable loop bandwidth: 1kHz-10kHz
Output enable/disable function
Includes Loss of Lock (LOL) output pin
1.8V ±5% to 3.3V ±10% output power supply
3.3V ±10% power supply operation
Industrial temperature range: –40°C to +85°C
Available in 24-pin (4mm x 4mm) MLF
SONET/SDH Communications
10GbE FEC
10GbE LAN PHY
High-end Routers
Add-Drop MUXes
SAS/SATA
Attenuator with Internal Termination
3.3V, 622MHz to 694MHz CML Jitter
– Low phase noise: -80dBc/Hz at 1 kHz offset
RMS
output jitter gen (12 kHz-20MHz)
SY89482L
hbwhelp@micrel.com
or (408) 955-1690
Precision Edge
®
M9999-040808-A
package
®

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sy89482l Summary of contents

Page 1

... The SY89482L operates at 3.3V ±10% supply and the output can accommodate 1.8V-3.3V operation with the dedicated output supply. The part is guaranteed to operate over the full industrial temperature range (–40°C to +85°C). The SY89482L is part of Micrel’s ® Precision Edge product line. Datasheets and support documentation can be found on Micrel’ ...

Page 2

... Micrel, Inc. Functional Block Diagram April 2008 2 hbwhelp@micrel.com SY89482L M9999-040808-A or (408) 955-1690 ...

Page 3

... Pb-Free bar-line indicator Industrial with Pb-Free bar-line indicator = 25°C, DC Electricals only VREF-AC REFIN /REFIN VDDC GND ® 24-Pin MLF (MLF-24) 3 Lead Package Marking Finish 482L NiPdAu Pb-Free 482L NiPdAu Pb-Free GNDA BW1 BW0 RESET LOL GND hbwhelp@micrel.com SY89482L M9999-040808-A or (408) 955-1690 ...

Page 4

... See “Loop Bandwidth Table.” Positive Power Supply: VDDC pins are connected to core and input stage that connects to a 3.3V ±10% power supply. Bypass with 0.1µF//0.01µF low ESR capacitors as close to the V pins as possible. 4 SY89482L -1.4V used when AC-coupling the DD pin. Bypass with 0.01uF low ESR T pin ...

Page 5

... Nominal Loop Bandwidth (Hz 10k Table 1. Loop Bandwidth Table 4.7 1 Table 2. PLL Loop Filter Capacitor Table 1kHz 2kHz 5kHz -50 -55 -70 -65 -65 -75 -90 -90 -90 -115 -110 -110 0.22 0.15 10kHz Units -75 dBc/Hz -80 dBc/Hz -90 dBc/Hz -115 dBc/Hz M9999-040808-A hbwhelp@micrel.com or (408) 955-1690 SY89482L ...

Page 6

... A (4) ® MLF Still-air (θ ) ...........................................50°C/W JA Junction-to-board (ψ ) .......................30.5°C/W JB Min Typ 3.0 3.3 1. 100 1.2 0 0.1 0.2 V –1.5 V –1 hbwhelp@micrel.com SY89482L Max Units 3.6 V 3.6 V 110 mA Ω 115 –0 1 –1 1.28 V and θ ...

Page 7

... Min Typ Max V -0.13 V -0.085 V -0.04 DDO DDO DDO V -0.63 V -0.485 V -0.34 DDO DDO DDO 300 400 500 600 800 1000 Min Typ Max 2 0.8 +5 2.4 0 M9999-040808-A hbwhelp@micrel.com or (408) 955-1690 SY89482L Units Ω Units V V µ µA µA ...

Page 8

... IN OUT Clock PLL out of Lock, ~4ms sustained I/O difference Min VCO frequency Max VCO frequency 20% to 80% 20% to 80% BW1 = 0, BW0 = 0 BW1 = 0, BW0 = 1 BW1 = 1, BW0 = 0 BW1 = 1, BW0 = 1 8 SY89482L /t < 400ps –40° Min Typ Max Units 622 694 1244 1388 ...

Page 9

... Min Typ Max 1000 0.1 Min Typ Max 2000 0.1 Min Typ Max 5000 0.1 Min Typ Max 10,000 0.1 M9999-040808-A hbwhelp@micrel.com or (408) 955-1690 SY89482L Units ps RMS Units psRMS Units psRMS Units psRMS ...

Page 10

... Phase Noise The SY89482L has very low phase noise at 1kHz offset from the center frequency. Phase noise is measured at the output with a jitter-free signal injected at the input. The loop bandwidth settings have a minor impact on the phase noise values. For 10kHz loop bandwidth, Micrel guarantees the phase noise less than -80dBc/Hz ...

Page 11

... Micrel, Inc. Phase Noise Characteristics April 2008 11 hbwhelp@micrel.com SY89482L M9999-040808-A or (408) 955-1690 ...

Page 12

... Micrel, Inc. Input and Output Stage Figure 2a. Simplified Differential Input Buffer Figure 2b. Simplified CML Output Buffer April 2008 Single-Ended and Differential Swings Figure 3a. Single-Ended Swing Figure 3b. Differential Swing 12 hbwhelp@micrel.com SY89482L M9999-040808-A or (408) 955-1690 ...

Page 13

... Micrel, Inc. Input Interface Applications Figure 4a. CML Interface (DC-Coupled) Option: May connect Figure 4d. LVPECL Interface (AC-Coupled) April 2008 Figure 4b. CML Interface (AC-Coupled) Figure 4e. LVDS Interface 13 SY89482L Figure 4c. LVPECL Interface (DC-Coupled) M9999-040808-A hbwhelp@micrel.com or (408) 955-1690 ...

Page 14

... Micrel, Inc. CML Output Termination Figure 5a. CML DC-Coupled Termination April 2008 Figure 5b. CML DC-Coupled Termination Figure 5c. CML AC-Coupled Termination 14 SY89482L M9999-040808-A hbwhelp@micrel.com or (408) 955-1690 ...

Page 15

... Micrel, Inc. Package Information Packages Notes: 1. Package meets Level 2 Moisture Sensitivity Classification. 2. All parts are dry-packed before shipment. 3. Exposed pad must be soldered to ground for proper thermal management April 2008 ® 24-Pin (4mm x 4mm) MLF (MLF-24) 15 SY89482L M9999-040808-A hbwhelp@micrel.com or (408) 955-1690 ...

Page 16

... A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. April 2008 PCB Thermal Consideration for 24-pin MLF © 2008 Micrel, Incorporated. 16 SY89482L ® Package M9999-040808-A hbwhelp@micrel.com or (408) 955-1690 ...

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