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SY89855U Datasheet, PDF (1/13 Pages) Micrel Semiconductor – Precision Low Power Differential LVPECL 4:1 MUX with 1:2 Fanout and Internal Termination | |||
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SY89855U
Precision Low Power Differential LVPECL 4:1
MUX with 1:2 Fanout and Internal Termination
General Description
The SY89855U is a 2.5V/3.3V precision, high-speed,
4:1 differential multiplexer with 100K LVPECL (800mV)
compatible outputs, capable of handling clocks up to
2.5GHz and data streams up to 2.5Gbps. In addition, a
1:2 fanout buffer provides two copies of the selected
inputs.
The differential input includes Micrelâs unique, 3-pin
input termination architecture that allows customers to
interface to any differential signal (AC- or DC-coupled)
as small as 100mV without any level shifting or
termination resistor networks in the signal path. The
result is a clean, stub-free, low-jitter interface solution.
The outputs are 800mV LVPECL, (100K temperature
compensated) with fast rise/fall times guaranteed to be
less than 180ps.
The SY89855U operates from a 2.5V ±5% supply or a
3.3V ±10% supply and is guaranteed over the full
industrial temperature range of â40°C to +85°C. For
applications that require higher performance, consider
the SY58029U. The SY89855U is part of Micrelâs high-
speed, Precision Edge® product line.
All support documentation can be found on Micrelâs web
site at www.micrel.com.
Typical Performance
Features
Precision Edge®
⢠Select 1 of 4 differential inputs
⢠Provides two copies of the selected input
⢠Low power 260mW (VCC = 2.5V)
⢠Guaranteed AC performance over temperature and
voltage:
â DC-to->2.5Gbps data rate throughput
â <410ps In-to-Q tpd
â <180ps tr / tf times
⢠Ultra low-jitter design:
â <10psPP total jitter (clock)
â <1psRMS random jitter
â <10psPP deterministic jitter
â <0.7psRMS crosstalk-induced jitter
⢠Unique, patent-pending input design minimizes
crosstalk
⢠Accepts an input signal as low as 100mV
⢠Unique patented input termination and VT pin
accepts DC- and AC-coupled inputs (CML, LVPECL,
LVDS)
⢠800mV 100K LVPECL output swing
⢠Power supply 2.5V ±5% or 3.3V ±10%
⢠â40°C to +85°C temperature range
⢠Available in 32-pin (5mm x 5mm) MLF® package
Applications
⢠Redundant clock and/or data distribution
⢠All SONET/OC-3 to OC-48 clock/data distribution
⢠Loopback
⢠All Fibre Channel applications
⢠All GigE applications
Markets
⢠LAN/WAN communication
⢠Enterprise servers
⢠ATE
⢠Test and measurement
Precision Edge is a registered trademark of Micrel, Inc
MLF and MicroLeadFrame are registered trademarks of Amkor Technology.
Micrel Inc. ⢠2180 Fortune Drive ⢠San Jose, CA 95131 ⢠USA ⢠tel +1 (408) 944-0800 ⢠fax + 1 (408) 474-1000 ⢠http://www.micrel.com
February 2007
M9999-022007-B
hbwhelp@micrel.com or (408) 955-1690
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