SY89112UMY-TR datasheet, PDF - EEWORLD Datasheet

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SY89112UMY-TR: DescriptionClock Multiplexer 12-OUT 2-IN 1:12 44-Pin QFN EP T/R; File Size859KB，14 Pages; ManufacturerMicrochip; Websitehttps://www.microchip.com; Environmental Compliance

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SY89112UMY-TR Overview

Clock Multiplexer 12-OUT 2-IN 1:12 44-Pin QFN EP T/R

SY89112UMY-TR Parametric

Parameter Name	Attribute value
EU restricts the use of certain hazardous substances	Compliant
ECCN (US)	EAR99
Part Status	Active
HTS	8542.39.00.01
Type	Clock Multiplexer
Fanout	1:12
Number of Outputs per Chip	12
Maximum Input Frequency (MHz)	3000(Typ)
Maximum Propagation Delay Time @ Maximum CL (ns)	0.55@2.375V to 3.6V
Absolute Propagation Delay Time (ns)	0.6
Output Logic Level	LVPECL
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)	130
Minimum Operating Temperature (°C)	-40
Maximum Operating Temperature (°C)	85
Supplier Temperature Grade	Industrial
Packaging	Tape and Reel
Supplier Package	QFN EP
Pin Count	44
Mounting	Surface Mount
Package Height	0.85(Max)
Package Length	7
Package Width	7
PCB changed	44

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SY89112U

2.5/3.3V Low-Jitter, Low-Skew 1:12 LVPECL

Fanout Buffer with 2:1 Input MUX and

Internal Termination

General Description

The SY89112U is a low-jitter, low-skew, high-speed

LVPECL 1:12 differential fanout buffer optimized for

precision telecom and enterprise server distribution

applications. The input includes a 2:1 MUX for clock

switchover application. Unlike other multiplexers, this input

includes a unique isolation design to minimize channel-to-

channel crosstalk. The SY89112U distributes clock

frequencies from DC to >2GHz guaranteed over

temperature and voltage. The SY89112U incorporates a

synchronous output enable (EN) so that the outputs will

only be enabled/disabled when they are already in the

LOW state. This reduces the chance of generating “runt”

clock pulses.

The SY89112U differential input includes Micrel’s unique,

patent-pending 3-pin input termination architecture that

directly interfaces to any differential signal (AC- or DC-

coupled) as small as 100mV (200mV

) without any level

shifting or termination resistor networks in the signal path.

For AC-coupled input interface, an on-board output

reference voltage (VREF-AC) is provided to bias the

center-tap (VT) pin. The outputs are 800mV, 100K-

compatible LVPECL with fast rise/fall times guaranteed to

be less than 220ps.

The SY89112U 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 SY89112U is

part of Micrel’s high-speed, Precision Edge product line.

Datasheets and support documentation are available on

Micrel’s web site at:

www.micrel.com.

Features



Selects between 1 of 2 inputs, and provides 12

precision, low skew LVPECL output copies



Guaranteed AC performance over temperature and

voltage:



DC to >2GHz throughput



<550ps propagation delay CLK-to-Q



<220ps rise/fall time



<25ps output-to-output skew



Ultra-low jitter design:



50fs

RMS

phase jitter (typ.)



<0.7ps

RMS

crosstalk induced jitter



Unique, patent-pending input termination and VT pin

accepts DC-coupled and AC-coupled differential inputs



Unique, patent-pending 2:1 input MUX provides superior

isolation to minimize channel-to-channel crosstalk



800mV, 100K LVPECL output swing



Power supply 2.5V +5% or 3.3V +10%



Industrial temperature range –40°C to +85°C



Available in 44-pin (7mm x 7mm) QFN package

Applications



Multi-processor server

SONET/SDH clock/data distribution

Fibre Channel distribution

Gigabit Ethernet clock distribution

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

April 8, 2014

040814-6.0

hbwhelp@micrel.com

or (408) 955-1690

SY89112UMY-TR Related Products

	SY89112UMY-TR	SY89112UMY
Description	Clock Multiplexer 12-OUT 2-IN 1:12 44-Pin QFN EP T/R	Clock Multiplexer 12-OUT 2-IN 1:12 44-Pin QFN EP Tray
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	1:12	1:12
Number of Outputs per Chip	12	12
Maximum Input Frequency (MHz)	3000(Typ)	3000(Typ)
Maximum Propagation Delay Time @ Maximum CL (ns)	0.55@2.375V to 3.6V	0.55@2.375V to 3.6V
Absolute Propagation Delay Time (ns)	0.6	0.6
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)	130	130
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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