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SY89474UMG

Description
Clock Multiplexer 2-OUT 2-IN 1:2 24-Pin VQFN EP Tube
File Size457KB,11 Pages
ManufacturerMicrochip
Websitehttps://www.microchip.com
Environmental Compliance
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SY89474UMG Overview

Clock Multiplexer 2-OUT 2-IN 1:2 24-Pin VQFN EP Tube

SY89474UMG Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)5A991.b
Part StatusActive
HTS8542.39.00.01
TypeClock Multiplexer
Fanout1:2
Number of Outputs per Chip2
Maximum Propagation Delay Time @ Maximum CL (ns)0.47@2.5V
Absolute Propagation Delay Time (ns)0.55
Input Logic LevelCML|PECL|LVDS
Output Logic LevelLVDS
Minimum Operating Supply Voltage (V)2.375
Typical Operating Supply Voltage (V)2.5
Maximum Operating Supply Voltage (V)2.625
Maximum Quiescent Current (mA)110
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Supplier Temperature GradeIndustrial
PackagingTube
Pin Count24
Standard Package NameQFN
Supplier PackageVQFN EP
MountingSurface Mount
Package Height0.85
Package Length4
Package Width4
PCB changed24
Lead ShapeNo Lead
SY89474U
Precision LVDS 2:1 Multiplexer with 1:2
Fanout and Internal Termination
General Description
The SY89474U is a 2.5V precision, high-speed 2:1
differential MUX capable of processing clocks up to
2.5GHz and data up to 2.5Gbps.
The differential input includes Micrel’s unique, 3-pin input
termination architecture that directly interfaces 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 325mV LVDS with fast rise/fall times guaranteed
to be less than 150ps.
The SY89474U operates from a 2.5V ±5% supply and is
guaranteed over the full industrial temperature range of
-40°C to +85°C. The SY89474U is part of Micrel’s high-
speed, Precision Edge
®
product line. For multiple clock
switchover solutions, please refer to the SY89840U–
SY89845U family.
All support documentation can be found on Micrel’s web
site at:
www.micrel.com.
Precision Edge
®
Features
Selects between two input channels and provides two
copies of the selected input
Guaranteed AC performance over temperature and
supply voltage:
DC to 2.5Gbps data throughput
DC to 2.5GHz f
MAX
(clock)
<470ps In-to-Out tpd
<150ps t
r
/t
f
<20ps output-to-output skew
Unique, patent-pending input isolation design
minimizes crosstalk
Ultra-low jitter design:
<1ps
RMS
random jitter
<10ps
PP
deterministic jitter
<1ps
RMS
cycle-to-cycle jitter
<10ps
PP
total jitter (clock)
<0.7ps
RMS
crosstalk induced jitter
Unique patent-pending input termination and VT pin
accepts DC- and AC-coupled inputs (CML, PECL,
LVDS)
325mV LVDS output swing
2.5V ±5% supply voltage
−40°C
to +85°C industrial temperature range
Available in 24-pin (4mm x 4mm) QFN package
Functional Block Diagram
Applications
Clock switchover
Data distribution
Markets
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
LAN/WAN
Enterprise Servers
ATE
Test and Measurement
August 2005
M9999-081105
hbwhelp@micrel.com
or (408) 955-1690

SY89474UMG Related Products

SY89474UMG SY89474UMG-TR
Description Clock Multiplexer 2-OUT 2-IN 1:2 24-Pin VQFN EP Tube Clock Multiplexer 2-OUT 2-IN 1:2 24-Pin VQFN EP T/R
EU restricts the use of certain hazardous substances Compliant Compliant
ECCN (US) 5A991.b EAR99
Part Status Active Active
HTS 8542.39.00.01 8542.39.00.01
Type Clock Multiplexer Clock Multiplexer
Fanout 1:2 1:2
Number of Outputs per Chip 2 2
Maximum Propagation Delay Time @ Maximum CL (ns) 0.47@2.5V 0.47@2.5V
Absolute Propagation Delay Time (ns) 0.55 0.55
Input Logic Level CML|PECL|LVDS CML|LVDS|PECL
Output Logic Level LVDS LVDS
Minimum Operating Supply Voltage (V) 2.375 2.375
Typical Operating Supply Voltage (V) 2.5 2.5
Maximum Operating Supply Voltage (V) 2.625 2.625
Maximum Quiescent Current (mA) 110 110
Minimum Operating Temperature (°C) -40 -40
Maximum Operating Temperature (°C) 85 85
Supplier Temperature Grade Industrial Industrial
Packaging Tube Tape and Reel
Pin Count 24 24
Standard Package Name QFN QFN
Supplier Package VQFN EP VQFN EP
Mounting Surface Mount Surface Mount
Package Height 0.85 0.85
Package Length 4 4
Package Width 4 4
PCB changed 24 24
Lead Shape No Lead No Lead

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