sy898531l Micrel Semiconductor, sy898531l Datasheet

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sy898531l

Manufacturer Part Number
sy898531l
Description
Precision Differential 3.3v Low Skew Lvpecl 1 9 Fanout Buffer
Manufacturer
Micrel Semiconductor
Datasheet

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General Description
The SY898531L is a 3.3V, low skew, 1:9 LVPECL fanout
buffer with two selectable clock input pairs. Most standard
differential input levels can be applied to the CLK, /CLK
pair while LVPECL, CML, or SSTL input levels can be
applied to the PCLK, /PCLK pair. To eliminate runt pulses
on the outputs during asynchronous assertion/de-assertion
of the clock enable pin, the clock enable is synchronized
with the input signal.
The SY898531L operates from a 3.3V ±5% supply and is
guaranteed over the full industrial temperature range of
0°C to +70°C. The SY898531L is part of Micrel’s high-
speed, Precision Edge
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Functional Block Diagram
Precision Edge is a registered trademark of Micrel, Inc.
October 2009
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
®
product line.
Features
∑ Provides nine differential 3.3V LVPECL copies
∑ Selects between differential CLK, /CLK or LVPECL clock
∑ CLK, /CLK pair accepts LVDS, LVPECL, LVHSTL,
∑ PCLK, /PCLK pair accepts LVPECL, CML, SSTL input
∑ Guaranteed AC performance over temperature and
∑ 3.3V ±5% supply voltage
∑ 0°C to +70°C temperature operating range
∑ Available in a 32-pin TQFP package
Applications
∑ SONET clock distribution
∑ Backplane distribution
Markets
∑ LAN/WAN
∑ Enterprise servers
∑ ATE
∑ Test and measurement
408
inputs
SSTL, HCSL input levels
levels
supply voltage:
500MHz Maximum output frequency
< 2ns Propagation delay (In-to-Q)
< 50ps Output skew
< 250ps Part-to-part skew
Additive phase jitter, RMS: 0.17ps (typical)
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
Precision Differential 3.3V Low Skew
LVPECL 1:9 Fanout Buffer
SY898531L
hbwhelp@micrel.com
Precision Edge
or (408) 955-1690
M9999-101509-A
®

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sy898531l Summary of contents

Page 1

... The SY898531L operates from a 3.3V ±5% supply and is guaranteed over the full industrial temperature range of 0°C to +70°C. The SY898531L is part of Micrel’s high- ® speed, Precision Edge product line. ...

Page 2

... Pin Configuration October 2009 Package Type Operating Range T32-1 Commercial T32-1 Commercial = 25°C, DC Electricals Only. A 32-Pin TQFP (T32-1) 3 Package Marking Lead Finish SY898531LTZ with Matte-tin Pb-Free bar-line Indicator Pb-Free SY898531LTZ with Matte-tin Pb-Free bar-line Indicator Pb-Free hbwhelp@micrel.com SY898531L M9999-101509-A or (408) 955-1690 ...

Page 3

... PCLK, /PCLK, and CLK_SEL inputs. See “Truth Table” below. Outputs Selected Source Q0 :Q8 CLK, /CLK Disabled : LOW PCLK, /PCLK Disabled : LOW CLK, /CLK CLK PCLK, /PCLK PCLK approximately 1.5V. TH /Q0:/Q8 Disabled : HIGH Disabled : HIGH /CLK /PCLK M9999-101509-A hbwhelp@micrel.com or (408) 955-1690 SY898531L ...

Page 4

... A (3) TSSOP ( Still-Air............................................................ 50°C/W Min Typ 3.135 3.3 3.135 3.3 Min Typ 2 -0.3 -150 -5 Min Typ -5 -150 0. 0.5 EE hbwhelp@micrel.com SY898531L Max Units 3.465 V 3.465 Max Units µA 150 µA µA µA Max Units 150 µA 5 µA µ ...

Page 5

... October 2009 (7) Condition PCLK 3.465V IN CC /PCLK 3.465V IN CC PCLK 3.465V IN CC /PCLK 3.465V 0.3V for single ended applications SY898531L Min Typ Max 150 5 -5 -150 0 1 1.4 V – 1 – 0.6 1.0 M9999-101509-A hbwhelp@micrel.com ...

Page 6

... This parameter is defined in accordance with JEDEC Standard 65. 14. Driving only one input clock. October 2009 (11) -2V 0°C to +70°C, unless otherwise stated. CCO A Condition f ≤ 250MHz 155.52MHz, (12KHz to 20MHz) 20% to 80% @ 50MHz 7 SY898531L Min Typ Max Units 500 MHz 250 0.17 ps 300 ...

Page 7

... Micrel, Inc. Timing Diagrams October 2009 Figure 1a. CLK_EN Timing Diagram Figure 1b. Propagation Delay Figure 1c. Output-to-Output Skew 8 SY898531L M9999-101509-A hbwhelp@micrel.com or (408) 955-1690 ...

Page 8

... Micrel, Inc. Typical Operating Characteristics V = 3.3V 0V 800mV October 2009 = 50Ω –2V 25°C, unless otherwise stated Output Swing vs. Frequency 900 800 700 600 500 400 300 200 100 0 FREQUENCY (MHz) 9 SY898531L M9999-101509-A hbwhelp@micrel.com or (408) 955-1690 ...

Page 9

... Micrel, Inc. Functional Characteristics V = 3.3V 0V 800mV October 2009 = 50Ω -2V 25°C, unless otherwise stated SY898531L M9999-101509-A hbwhelp@micrel.com or (408) 955-1690 ...

Page 10

... Micrel, Inc. CLK, /CLK Input Interface Applications Figure 2a. LVHSTL Interface (DC-Coupled) Figure 2d. LVDS Interface (DC-Coupled) October 2009 Figure 2b. LVPECL Interface (DC-Coupled) Figure 2e. LVPECL Interface (AC-Coupled) 11 SY898531L Figure 2c. LVPECL Interface (DC-Coupled) M9999-101509-A hbwhelp@micrel.com or (408) 955-1690 ...

Page 11

... Micrel, Inc. PCLK, /PCLK Input Interface Applications Figure 3a. CML Open Collector Interface (DC-Coupled) Figure 3d. LVPECL Interface (AC-Coupled) October 2009 Figure 3b. CML Built-in Pull-up Interface (DC-Coupled) Figure 3e. SSTL Interface (DC-Coupled) 12 SY898531L Figure 3c. LVPECL Interface (DC-Coupled) Figure 3f. LVDS Interface (AC-Coupled) M9999-101509-A hbwhelp@micrel.com or (408) 955-1690 ...

Page 12

... 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 October 2009 32-Pin TQFP (T32-1) indemnify Micrel for any damages resulting from such use or sale. © 2009 Micrel, Incorporated. 13 SY898531L M9999-101509-A hbwhelp@micrel.com or (408) 955-1690 ...

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