Microchip SY89855U Bedienungsanleitung
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SY89855U
Precision Low Power Differential LVPECL 4:1
MUX with 1:2 Fanout and Internal
Termination
Micrel Inc. • 2180 Fortu
ne Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-08
00 • fax + 1 (408) 474-1000 • http://www.micrel.com
August 2007
M9999-082907-C
or (408) 955-1690
General Description
The SY8985
5U 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 Micrel’s 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 –40°C to +85°C. For
applications that require higher performance, consider
the SY58029U. The SY89855U 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
.
Typical Performance
Precision Edge
®
Features
•Select 1 of 4 differential inputs
•Provide
s two copies of the selected input
•Low power 260mW (V
CC
= 2.5V)
•Guaranteed AC performance over temperature and
voltage:
–DC-to->2.5Gbps data rate throughput
–
<410ps In-to-Q t
pd
–<180p
s t
r
/ t
f
times
•Ultra low-jitter design:
–
<10
p
s
PP
total jitter (clock)
–<1ps
RMS
random jitter
–<10ps
PP
deterministic jitter
–<0.7ps
RMS
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%
•–40°C to +85°C temperature range
•
Available in 32-pin (5mm x 5mm) QFN packag
e
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 registeredtrademark of Micrel, Inc.
Produktspezifikationen
| Marke: | Microchip |
| Kategorie: | Nicht kategorisiert |
| Modell: | SY89855U |
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