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SY89840UMG-TR

Description
Clock Multiplexer 1-OUT 2-IN 1:1 16-Pin QFN EP T/R
File Size619KB,15 Pages
ManufacturerMicrochip
Websitehttps://www.microchip.com
Environmental Compliance
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SY89840UMG-TR Overview

Clock Multiplexer 1-OUT 2-IN 1:1 16-Pin QFN EP T/R

SY89840UMG-TR Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8542.39.00.01
TypeClock Multiplexer
Fanout1:1
Number of Outputs per Chip1
Maximum Propagation Delay Time @ Maximum CL (ns)0.88@2.375V to 3.6V
Absolute Propagation Delay Time (ns)0.9
Input Logic LevelCML|LVDS|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)95
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Supplier Temperature GradeIndustrial
PackagingTape and Reel
Supplier PackageQFN EP
Pin Count16
MountingSurface Mount
Package Height0.85(Max)
Package Length3
Package Width3
PCB changed16
SY89840U
Precision LVPECL Runt Pulse Eliminator 2:1
Multiplexer
General Description
The SY89840U is a low jitter PECL, 2:1 differential input
multiplexer (MUX) optimized for redundant source
switchover applications. Unlike standard multiplexers,
the SY89840U unique 2:1 Runt Pulse Eliminator (RPE)
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 DC voltage (voltage
between the pins of the differential input drops below
100mV).
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 100mV (200mV
pp
) without any level shifting or
termination resistor networks in the signal path. The
output is 800mV, 100K compatible LVPECL with fast
rise/fall times guaranteed to be less than 190ps.
The SY89840U 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 SY89840U 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 a glitch-free,
stable LVPECL output
Guaranteed AC performance over temperature and supply
voltage:
– Wide operating frequency: 1kHz to >1.5GHz
– < 880ps In-to-Out t
pd
– < 190ps t
r
/t
f
Unique patent-pending input isolation design minimizes
crosstalk
Fail-safe input prevents oscillations
Ultra-low jitter design:
– 140fs RMS phase jitter (Typ)
– 0.7ps
rms
MUX crosstalk induced jitter
Unique patent-pending input termination and VT pin
accepts DC-coupled and AC-coupled inputs (CML,
PECL, LVDS)
800mV LVPECL output swing
2.5V ±5% or 3.3V ±10% supply voltage
–40°C to +85°C industrial temperature range
Available in 16-pin (3mm x 3mm) QFN package
Applications
Redundant clock switchover
Failsafe 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
Oct. 1, 2013
M9999-021705
hbwhelp@micrel.com
or (408) 955-1690

SY89840UMG-TR Related Products

SY89840UMG-TR SY89840UMG
Description Clock Multiplexer 1-OUT 2-IN 1:1 16-Pin QFN EP T/R Clock Multiplexer 1-OUT 2-IN 1:1 16-Pin QFN EP Tube
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 1:1 1:1
Number of Outputs per Chip 1 1
Maximum Propagation Delay Time @ Maximum CL (ns) 0.88@2.375V to 3.6V 0.88@2.375V to 3.6V
Absolute Propagation Delay Time (ns) 0.9 0.9
Input Logic Level CML|LVDS|PECL LVDS|PECL|CML
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) 95 95
Minimum Operating Temperature (°C) -40 -40
Maximum Operating Temperature (°C) 85 85
Supplier Temperature Grade Industrial Industrial
Packaging Tape and Reel Tube
Supplier Package QFN EP QFN EP
Pin Count 16 16
Mounting Surface Mount Surface Mount
Package Height 0.85(Max) 0.85(Max)
Package Length 3 3
Package Width 3 3
PCB changed 16 16
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