Microchip SY89473U Manual


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SY89473U
Precision LVPECL 2:1 Multiplexer with 1:2
Fanout and Internal Termination
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
May 2007 M9999-052207-B
hbwhelp@micrel.com or (408) 955-1690
General Description
The SY89473U is a 2.5V/3.3V 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 (200mVPP) 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 SY89473U 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 SY89473U is
part of Micrel’s high-speed, Precision Edge® product
line. For multiple-clock switchover solutions, please refer
to the SY89840–SY89843U family.
All support documentation can be found on Micrel’s web
site at: www.micrel.com.
Functional Block Diagram
Precision Edge®
Features
Selects between two input channels and provides two
copies of the selected output
Guaranteed AC performance over temperature and
supply voltage:
- DC to 2.5Gbps data throughput
- DC to 2.5GHz fMAX (clock)
- <500ps In-to-Out tpd
- <190ps tr/tf
- <20ps Output-to-output skew
Unique patented input isolation design minimizes
crosstalk
Ultra-low Jitter Design:
- <1psRMS random jitter
- <1psRMS cycle-to-cycle jitter
- <10psPP total jitter (clock)
- <0.7psRMS
crosstalk induced jitter
Unique patent-pending input termination and VT pin
accepts DC- and AC-coupled inputs (CML, PECL,
LVDS)
800mV (100K) LVPECL output swing
2.5V ±5% or 3.3V ±10% supply voltage
-40°C to +85°C industrial temperature range
Available in 24-pin (4mm x 4mm) QFN package
Applications
Clock switchover
Data distribution
Markets
LAN/WAN
Enterprise servers
ATE
Test and measurement
Precision Edge is a registered trademark of Micrel, Inc.


Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: SY89473U

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