SY89846UMG datasheet, PDF - EEWORLD Datasheet

SY89846UMG: DescriptionClock Multiplexer 5-OUT 2-IN 1:5 32-Pin QFN EP Tube; File Size771KB，15 Pages; ManufacturerMicrochip; Websitehttps://www.microchip.com; Environmental Compliance

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SY89846UMG Overview

Clock Multiplexer 5-OUT 2-IN 1:5 32-Pin QFN EP Tube

SY89846UMG 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	1:5
Number of Outputs per Chip	5
Maximum Input Frequency (MHz)	2000(Typ)
Maximum Propagation Delay Time @ Maximum CL (ns)	1.1@2.375V to 3.6V
Absolute Propagation Delay Time (ns)	1.1
Maximum Duty Cycle	55%
Input Logic Level	CML\|LVDS\|PECL
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)	75
Minimum Operating Temperature (°C)	-40
Maximum Operating Temperature (°C)	85
Supplier Temperature Grade	Industrial
Packaging	Tube
Pin Count	32
Standard Package Name	QFN
Supplier Package	QFN EP
Mounting	Surface Mount
Package Height	0.85(Max)
Package Length	5
Package Width	5
PCB changed	32
Lead Shape	No Lead

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SY89846U

1.5GHz Precision, LVPECL 1:5 Fanout with 2:1

MUX and Fail Safe Input with Internal

Termination

Precision Edge

General Description

The SY89846U is a 2.5/3.3V, 1:5 LVPECL fanout

buffer with a 2:1 differential input multiplexer (MUX).

A unique Fail-Safe Input (FSI) protection prevents

metastable output conditions when the selected

input clock fails to a DC voltage (voltage between

the pins of the differential input drops significantly

below 100mV).

The differential input includes Micrel’s unique, 3-pin

internal termination architecture that can interface 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. The

outputs are 800mV, LVPECL with fast rise/fall times

guaranteed to be less than 250ps.

The SY89846U 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

SY89846U 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 inputs, and provides 5 precision

LVPECL copies



Fail-Safe Input

– Prevents outputs from oscillating when input is

invalid



Guaranteed AC performance over temperature and

supply voltage:

– DC-to >1.5GHz throughput

–

< 900ps Propagation Delay (IN-to-Q)

– < 250ps Rise/Fall times



Ultra-low jitter design:

– 150fs RMS phase jitter (Typ)

– 0.7ps

RMS

MUX crosstalk induced jitter



Unique, patented MUX input isolation design

minimizes adjacent channel crosstalk



Unique patented internal termination and VT pin

accepts DC- and AC-coupled inputs (CML, PECL,

LVDS)



Wide input voltage range. VCC to GND



2.5V ±5% or 3.3 ±10% supply voltage



-40°C to +85°C industrial temperature range



Available in 32-pin (5mm x 5mm) QFN package

Functional Block Diagram

Applications



Fail-safe clock protection



SONET clock distribution



Backplane 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

Oct. 1, 2013

M9999-072211B

hbwhelp@micrel.com

or (408) 955-1690

SY89846UMG Related Products

	SY89846UMG	SY89846UMG-TR
Description	Clock Multiplexer 5-OUT 2-IN 1:5 32-Pin QFN EP Tube	Clock Multiplexer 5-OUT 2-IN 1:5 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	1:5	1:5
Number of Outputs per Chip	5	5
Maximum Input Frequency (MHz)	2000(Typ)	2000(Typ)
Maximum Propagation Delay Time @ Maximum CL (ns)	1.1@2.375V to 3.6V	1.1@2.375V to 3.6V
Absolute Propagation Delay Time (ns)	1.1	1.1
Maximum Duty Cycle	55%	55%
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)	75	75
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
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

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