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SY89228UMG

Description
Clock Divider 1-OUT 1-IN 1:1 16-Pin QFN EP Tube
File Size508KB,16 Pages
ManufacturerMicrochip
Websitehttps://www.microchip.com
Environmental Compliance
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SY89228UMG Overview

Clock Divider 1-OUT 1-IN 1:1 16-Pin QFN EP Tube

SY89228UMG Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8542.39.00.01
TypeClock Divider
Fanout1:1
Number of Outputs per Chip1
Maximum Input Frequency (MHz)1500(Typ)
Maximum Propagation Delay Time @ Maximum CL (ns)1.5@2.375V to 3.6V
Absolute Propagation Delay Time (ns)1.5
Maximum Duty Cycle54%
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)55
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Supplier Temperature GradeIndustrial
PackagingTube
Pin Count16
Standard Package NameQFN
Supplier PackageQFN EP
MountingSurface Mount
Package Height0.85(Max)
Package Length3
Package Width3
PCB changed16
Lead ShapeNo Lead
SY89228U
1GHz Precision, LVPECL ÷3, ÷5 Clock Divider
with Fail-Safe Input and Internal Termination
General Description
The SY89228U is a precision, low jitter 1GHz
÷3, ÷5
clock divider with an LVPECL output. A unique Fail-
Safe Input (FSI) protection prevents metastable
output conditions when the input clock voltage swing
drops significantly below 100mV or input is removed.
The differential input includes Micrel’s unique, 3-pin
internal termination architecture that allows the input
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 270ps.
The SY89228U 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
SY89228U 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
Accepts a high-speed input and provides a precision
÷3
and
÷5
sub-rate, LVPECL output
Fail-Safe Input
– Prevents oscillations when input is invalid
Guaranteed AC performance over temperature and
supply voltage:
– DC-to >1.0GHz throughput
– < 1500ps Propagation Delay (In-to-Q)
– < 270ps Rise/Fall times
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)
Wide input voltage range VCC to GND
800mV LVPECL output
46% to 54% Duty Cycle(÷ 3)
47% to 53% Duty Cycle(÷ 5)
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
Block Diagram
Applications
Fail-safe clock protection
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 2007
M9999-080707-A
hbwhelp@micrel.com
or (408) 955-1690

SY89228UMG Related Products

SY89228UMG SY89228UMG-TR
Description Clock Divider 1-OUT 1-IN 1:1 16-Pin QFN EP Tube Clock Divider 1-OUT 1-IN 1:1 16-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 Divider Clock Divider
Fanout 1:1 1:1
Number of Outputs per Chip 1 1
Maximum Input Frequency (MHz) 1500(Typ) 1500(Typ)
Maximum Propagation Delay Time @ Maximum CL (ns) 1.5@2.375V to 3.6V 1.5@2.375V to 3.6V
Absolute Propagation Delay Time (ns) 1.5 1.5
Maximum Duty Cycle 54% 54%
Input Logic Level CML|LVDS|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) 55 55
Minimum Operating Temperature (°C) -40 -40
Maximum Operating Temperature (°C) 85 85
Supplier Temperature Grade Industrial Industrial
Packaging Tube Tape and Reel
Pin Count 16 16
Supplier Package QFN EP QFN EP
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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