sy89467u Micrel Semiconductor, sy89467u Datasheet

no-image

sy89467u

Manufacturer Part Number
sy89467u
Description
Sy89467u Precision Lvpecl 1 20 Fanout With 2 1 Mux And Internal Termination With Fail-safe Input
Manufacturer
Micrel Semiconductor
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
sy89467uHY
Manufacturer:
MICREL
Quantity:
160
Part Number:
sy89467uHY
Manufacturer:
Micrel Inc
Quantity:
10 000
Part Number:
sy89467uHY TR
Manufacturer:
Micrel Inc
Quantity:
10 000
General Description
The SY89467U is a 2.5/3.3V, 1:20 LVPECL fanout
buffer with a 2:1 differential input multiplexer (MUX).
A unique Fail-Safe Input (FSI) protection prevents
metastable output conditions when the selected
input clock fails to a DC voltage (when voltage
between the pins of the differential input drops
significantly below 100mV).
The differential input includes Micrel’s unique, 3-pin
internal termination architecture that can interface to
any differential signal (AC- or DC-coupled) as small
as 100mV (200mV
termination resistor networks in the signal path. The
outputs are 800mV, LVPECL with fast rise/fall times
guaranteed to be less than 270ps.
The SY89467U operates from a 2.5V ±5% or 3.3V
±10% supply and is guaranteed over the full
industrial temperature range of –40°C to +85°C. The
SY89467U is part of Micrel’s high-speed, Precision
Edge
All support documentation can be found on Micrel’s
web site at: www.micrel.com.
Functional Block Diagram
April 2008
Precision Edge is a registered trademark of Micrel, Inc.
MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc.
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.
PP
) without any level shifting or
Precision LVPECL 1:20 Fanout with 2:1 MUX
and Internal Termination with Fail-Safe Input
Features
• Selects between two inputs, and provides 20
• Fail-Safe Input
• Guaranteed AC performance over temperature and
• Ultra-low jitter design:
• Unique, patented MUX input isolation design
• Unique patented internal termination and VT pin
• Wide input voltage range: V
• 2.5V ±5% or 3.3V ±10% supply voltage
• -40°C to +85°C industrial temperature range
• Available in 64-pin TQFP package
Applications
• Fail-safe clock protection
• SONET clock distribution
• Backplane distribution
Markets
• LAN/WAN
• Enterprise servers
• ATE
• Test and measurement
precision LVPECL copies
– Prevents outputs from oscillating when input is
invalid
supply voltage:
– DC-to >1.5 GHz throughput
– < 1200ps Propagation Delay (In-to-Q)
– 270ps Rise/Fall times
– <1ps
– <1ps
– <10ps
– <0.7ps
minimizes adjacent channel crosstalk
accepts DC- and AC-coupled inputs (CML, PECL,
LVDS)
RMS
RMS
PP
RMS
total jitter (clock)
random jitter
cycle-to-cycle jitter
MUX crosstalk induced jitter
SY89467U
hbwhelp@micrel.com
CC
to GND
or (408) 955-1690
Precision Edge
M9999-040808-C
®

Related parts for sy89467u

sy89467u Summary of contents

Page 1

... The outputs are 800mV, LVPECL with fast rise/fall times guaranteed to be less than 270ps. The SY89467U operates from a 2.5V ±5% or 3.3V ±10% supply and is guaranteed over the full industrial temperature range of –40°C to +85°C. The SY89467U is part of Micrel’s high-speed, Precision ® ...

Page 2

... Tape and Reel. Pin Configuration April 2008 Operating Type Range Industrial Industrial = 25°C, DC Electricals Only. A 64-Pin EPAD-TQFP (T64-1) 2 Package Marking Finish SY89467UHY with Matte-Sn Pb-Free bar-line Indicator Pb-Free SY89467UHY with Matte-Sn Pb-Free bar-line Indicator Pb-Free M9999-040808-C hbwhelp@micrel.com or (408) 955-1690 SY89467U Lead ...

Page 3

... Due to limited drive capability, each VREF-AC pin is only intended to CC Inputs /IN0 IN1 /IN1 SEL –1.2V. They are used for AC-coupling inputs / Outputs hbwhelp@micrel.com or (408) 955-1690 SY89467U / M9999-040808-C ...

Page 4

... A ( Still-Air ..................................................... 35°C Junction-to-Board .................................... 21°C/W Min Typ 2.375 2.5 3.0 3.3 120 100 0 0.1 0 –1.3 V –1 hbwhelp@micrel.com SY89467U Max Units 2.625 V 3.6 V 165 mA Ω 55 Ω 110 –0 1 100 mV –1 1.28 V and JA M9999-040808-C or (408) 955-1690 ...

Page 5

... See Figure 2b. (7) = –40° 85°C, unless otherwise stated. A Condition 5 (7) Min Typ V -1.145 -1.945 550 800 1100 1600 Min Typ 2.0 -125 -300 hbwhelp@micrel.com SY89467U Max Units -0.895 V -1.695 950 mV 1900 mV Max Units V 0 µA µA M9999-040808-C or (408) 955-1690 ...

Page 6

... T where T is the time between rising edges of the n n-1 12 output edges will deviate by more M9999-040808-C hbwhelp@micrel.com or (408) 955-1690 SY89467U Units GHz GHz RMS 1 ps RMS 10 ...

Page 7

... PK frequency of the SY89467U is limited by the FSI function. Refer to Figure 1b. April 2008 Input Clock Failure Case If the input clock fails to a floating, static, or extremely low signal swing such that the voltage across the input pair is significantly less than 100mV, FSI function will /2 ...

Page 8

... Micrel, Inc. Timing Diagrams April 2008 Figure 1a. SEL-to-Q Delay Figure 1b. Fail-Safe Feature 8 SY89467U M9999-040808-C hbwhelp@micrel.com or (408) 955-1690 ...

Page 9

... Micrel, Inc. April 2008 Figure 1c. Enable Output Timing Diagram Figure 1d. Propagation Delay Figure 1e. Setup and Hold Time 9 SY89467U M9999-040808-C hbwhelp@micrel.com or (408) 955-1690 ...

Page 10

... Micrel, Inc. Typical Operating Characteristics V = 3.3V, GND = 0V 200mV April 2008 = 50Ω –2V 25°C, unless otherwise stated SY89467U M9999-040808-C hbwhelp@micrel.com or (408) 955-1690 ...

Page 11

... Micrel, Inc. Functional Characteristics V = 3.3V, GND = 0V 100mV April 2008 = 50Ω -2V 25°C, unless otherwise stated SY89467U M9999-040808-C hbwhelp@micrel.com or (408) 955-1690 ...

Page 12

... Micrel, Inc. Single-Ended and Differential Swings Figure 2a. Single-Ended Voltage Swing Input and Output Stages Figure 3a. Simplified Differential Input Stage April 2008 Figure 2b. Differential Voltage Swing Figure 3b. Simplified Differential Output Stage 12 hbwhelp@micrel.com SY89467U M9999-040808-C or (408) 955-1690 ...

Page 13

... Micrel, Inc. Input Interface Applications Figure 4a. LVPECL Interface (DC-Coupled) Figure 4d. CML Interface (AC-Coupled) April 2008 Figure 4b. LVPECL Interface (AC-Coupled) Figure 4e. LVDS Interface (DC-Coupled) 13 SY89467U Option: may connect Figure 4c. CML Interface (DC-Coupled) M9999-040808-C hbwhelp@micrel.com or (408) 955-1690 ...

Page 14

... Precision LVDS 1:20 Fanout MUX with 2:1 MUX and internal termination with Fail Safe Input ® MLF Application Note HBW Solutions New Products and Applications April 2008 impedance Figure 5b. Parallel Termination Data Sheet Link http://www.micrel.com/_PDF/HBW/sy89467u.pdf#page=2 www.amkor.com/products/notes_papers/MLFAppNote.pdf www.micrel.com/product-info/products/solutions.shtml 14 SY89467U (3-Resistor) M9999-040808-C hbwhelp@micrel.com or (408) 955-1690 ...

Page 15

... 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 64-Pin EPAD-TQFP (T64-1) © 2007 Micrel, Inc. 15 hbwhelp@micrel.com SY89467U M9999-040808-C or (408) 955-1690 ...

Related keywords