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SY89837UMG

Description
Clock Multiplexer 8-OUT 2-IN 1:8 32-Pin QFN EP Tube
File Size436KB,14 Pages
ManufacturerMicrochip
Websitehttps://www.microchip.com
Environmental Compliance
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SY89837UMG Overview

Clock Multiplexer 8-OUT 2-IN 1:8 32-Pin QFN EP Tube

SY89837UMG Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8542.39.00.01
TypeClock Multiplexer
Fanout1:8
Number of Outputs per Chip8
Maximum Input Frequency (MHz)2000(Typ)
Maximum Propagation Delay Time @ Maximum CL (ns)0.975@2.375V to 3.63V
Absolute Propagation Delay Time (ns)0.975
Input Logic LevelLVDS|CML|PECL
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
PackagingTube
Pin Count32
Standard Package NameQFN
Supplier PackageQFN EP
MountingSurface Mount
Package Height0.85(Max)
Package Length5
Package Width5
PCB changed32
Lead ShapeNo Lead
Micrel, Inc.
PRECISION 1:8 LVPECL FANOUT
BUFFER WITH 2:1 RUNT PULSE
ELIMINATOR INPUT MUX
Precision Edge
®
SY89837U
Precision Edge
®
SY89837U
FEATURES
Selects between two clocks, and provides 8
precision, low skew LVPECL output copies
Guaranteed AC performance over temperature and
supply voltage:
Wide operating frequency: 1kHz to >1.5GHz
• <975ps in-to-out t
pd
• <40ps output-to-output skew
Unique input isolation design minimizes crosstalk
Ultra-low jitter design:
• 150fs RMS phase jitter
• <0.7ps
rms
MUX crosstalk induced jitter
• <180ps t
r
/t
f
Precision Edge
®
DESCRIPTION
The SY89837U is a low jitter, low skew, high-speed 1:8
fanout buffer with a unique, 2:1 differential input multiplexer
(MUX) optimized for clock redundant switchover applications.
Unlike standard multiplexers, the SY89837U unique 2:1 runt
pulse eliminator (RPE) input MUX prevents any short cycles
or “runt” pulses during switchover. In addition, a unique
fail-safe input protection prevents metastable conditions
when the selected input clock fails to a static DC differential
voltage (differential input voltage drops below 200mV).
The SY89837U distributes clock frequencies from 1kHz to
1.5GHz, guaranteed, over temperature and voltage.
The differential input includes Micrel’s unique, 3-pin input
termination architecture that allows customers to interface
to any differential signal (AC- or DC-coupled) as small as
200mV 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 200ps.
The SY89837U 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 SY89837U 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.
Unique input termination and VT pin accepts DC- or
AC-coupled inputs (CML, PECL, LVDS)
800mV LVPECL output swing
Power supply +2.5V ±5% or +3.3V ±10%
–40°C to +85°C industrial temperature range
Available in 32-pin (5mm x 5mm) QFN package
APPLICATIONS
Redundant clock distribution
Fail-safe clock protection
Precision Edge is a registered trademark of Micrel, Inc.
M9999-060410
hbwhelp@micrel.com or (408) 955-1690
1
Rev.: F
Amendment: /0
Issue Date: June 2010

SY89837UMG Related Products

SY89837UMG SY89837UMG-TR
Description Clock Multiplexer 8-OUT 2-IN 1:8 32-Pin QFN EP Tube Clock Multiplexer 8-OUT 2-IN 1:8 32-Pin QFN EP T/R
EU restricts the use of certain hazardous substances Compliant Compliant
ECCN (US) EAR99 EAR99
Part Status Active Active
HTS 8542.39.00.01 8542.39.00.01
Type Clock Multiplexer Clock Multiplexer
Fanout 1:8 1:8
Number of Outputs per Chip 8 8
Maximum Input Frequency (MHz) 2000(Typ) 2000(Typ)
Maximum Propagation Delay Time @ Maximum CL (ns) 0.975@2.375V to 3.63V 0.975@2.375V to 3.63V
Absolute Propagation Delay Time (ns) 0.975 0.975
Input Logic Level LVDS|CML|PECL 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 Tube Tape and Reel
Pin Count 32 32
Standard Package Name QFN QFN
Supplier Package QFN EP QFN EP
Mounting Surface Mount Surface Mount
Package Height 0.85(Max) 0.85(Max)
Package Length 5 5
Package Width 5 5
PCB changed 32 32
Lead Shape No Lead No Lead
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