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SY89464UMY-TR

Description
Clock Multiplexer 10-OUT 2-IN 1:10 44-Pin QFN EP T/R
File Size658KB,19 Pages
ManufacturerMicrochip
Websitehttps://www.microchip.com
Environmental Compliance
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SY89464UMY-TR Overview

Clock Multiplexer 10-OUT 2-IN 1:10 44-Pin QFN EP T/R

SY89464UMY-TR Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)5A991.b.1
Part StatusActive
TypeClock Multiplexer
Fanout1:10
Number of Outputs per Chip10
Maximum Input Frequency (MHz)2000(Typ)
Maximum Propagation Delay Time @ Maximum CL (ns)1.15@2.375V to 3.63V
Absolute Propagation Delay Time (ns)1.2
Input Logic LevelLVDS|PECL|CML
Output Logic LevelLVPECL
Minimum Operating Supply Voltage (V)2.375
Typical Operating Supply Voltage (V)2.5|3.3
Maximum Operating Supply Voltage (V)3.6
Maximum Quiescent Current (mA)160
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Supplier Temperature GradeIndustrial
PackagingTape and Reel
Supplier PackageQFN EP
Pin Count44
MountingSurface Mount
Package Height0.85(Max)
Package Length7
Package Width7
PCB changed44
SY89464U
Precision LVPECL 1:10 Fanout with 2:1 Runt
Pulse Eliminator MUX and Internal Termination
General Description
The SY89464U is a low jitter 1:10 LVPECL fanout
buffer with a 2:1 differential input multiplexer (MUX)
optimized for redundant source switchover
applications. Unlike standard multiplexers, the
SY89464U’s unique 2:1 Runt Pulse Eliminator
(RPE) MUX prevents any short cycles or “runt”
pulses during switchover. In addition, a unique Fail-
Safe Input (FSI) protection prevents metastable
output conditions when the selected input clock fails
to a DC voltage (voltage between the pins of the
differential input drops below 100mV).
The differential input includes Micrel’s unique, 3-pin
internal termination architecture that allows
customers to interface to any differential signal (AC-
or DC-coupled) as small as 100mV (200mV
PP
)
without any level shifting or termination resistor
networks in the signal path. The outputs are 800mV,
100K-compatible LVPECL with fast rise/fall times
guaranteed to be less than 220ps.
The SY89464U 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
SY89464U is part of Micrel’s high-speed, Precision
®
Edge product line.
All support documentation can be found on Micrel’s
web site at:
www.micrel.com.
Precision Edge
®
Features
Selects between two sources, and provides 10
precision LVPECL copies
Guaranteed AC performance over temperature and
supply voltage:
– Wide operating frequency: 1kHz to >1.5GHz
– < 1100ps In-to-Out t
pd
– < 220ps t
r
/t
f
Unique, patent-pending MUX input isolation design
minimizes adjacent channel crosstalk
Fail-Safe Input prevents oscillations
Ultra-low jitter design:
– <1ps
RMS
random jitter
– <1ps
RMS
cycle-to-cycle jitter
– <10ps
PP
total jitter (clock)
– <0.7ps
RMS
MUX crosstalk induced jitter
Unique patented internal termination and VT pin
accepts DC- and AC-coupled inputs (CML, PECL,
LVDS)
800mV LVPECL output
2.5V ±5% or 3.3V ±10% supply voltage
Output enable
-40°C to +85°C industrial temperature range
Available in 44-pin (7mm x 7mm) QFN package
Applications
Redundant clock switchover
Fail-safe clock protection
Markets
LAN/WAN
Enterprise servers
ATE
Test and measurement
United States Patent No. RE44,134
Precision Edge is a registered trademark of Micrel, 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
December 2007
M9999-120607-C
hbwhelp@micrel.com
or (408) 955-1690

SY89464UMY-TR Related Products

SY89464UMY-TR SY89464UMY
Description Clock Multiplexer 10-OUT 2-IN 1:10 44-Pin QFN EP T/R Clock Multiplexer 10-OUT 2-IN 1:10 44-Pin QFN EP Tray
EU restricts the use of certain hazardous substances Compliant Compliant
ECCN (US) 5A991.b.1 EAR99
Part Status Active Active
Type Clock Multiplexer Clock Multiplexer
Fanout 1:10 1:10
Number of Outputs per Chip 10 10
Maximum Input Frequency (MHz) 2000(Typ) 2000(Typ)
Maximum Propagation Delay Time @ Maximum CL (ns) 1.15@2.375V to 3.63V 1.15@2.375V to 3.63V
Absolute Propagation Delay Time (ns) 1.2 1.2
Input Logic Level LVDS|PECL|CML CML|LVDS|PECL
Output Logic Level LVPECL LVPECL
Minimum Operating Supply Voltage (V) 2.375 2.375
Typical Operating Supply Voltage (V) 2.5|3.3 2.5|3.3
Maximum Operating Supply Voltage (V) 3.6 3.6
Maximum Quiescent Current (mA) 160 160
Minimum Operating Temperature (°C) -40 -40
Maximum Operating Temperature (°C) 85 85
Supplier Temperature Grade Industrial Industrial
Packaging Tape and Reel Tray
Supplier Package QFN EP QFN EP
Pin Count 44 44
Mounting Surface Mount Surface Mount
Package Height 0.85(Max) 0.85(Max)
Package Length 7 7
Package Width 7 7
PCB changed 44 44
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