Microchip SY55858U Bedienungsanleitung


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1
SuperLite™
SY55858U
Micrel, Inc.
M9999-110705
[email protected] or (408) 955-1690
DESCRIPTION
■Guaranteed AC parameters over temperature:
•f
MAX
>3.0GHz (3Gbps)
•t
r
/ t
f
<120ps
•Within-device skew <25ps
■Non-blocking “switch architecture”
■Configurable as dual 2:1 mux, dual 1:2 fanout buffer,
1:4 fanout buffer, quad buffer, or dual 2x2 switch
■50Ω compatible outputs
■Unique input termination and V
T
pin for DC-coupled
and AC-coupled input signals–CML or PECL
■Fully differential inputs/outputs
■TTL/CMOS compatible control logic
■Wide supply voltage range:2.3V to 3.6V
■Wide operating temperature range:–40°C to +85°C
■Available in 32-pin EPAD-TQFP package
The SY55858U is a low-voltage, high-speed dual 2x2
crosspoint switch with a flexible input that accepts CML
or PECL, and a 50Ω compatible differential CML (current-
mode logic) output. The non-blocking design allows any
input to connect to any output. Varying the state of the
select inputs allows SY55858U to be used in backup,
fault tolerant, protection and backplane distribution
applications.
The signal inputs (DA
0–1
and DB
0–1
) have a unique
internal termination design that allows access to the
termination network through V
T
pins. This feature allows
the device to easily interface to other logic standards
such as AC-coupled or DC-coupled PECL/LVPECL
signals. For applications that require a single-channel
2x2 crosspoint, consider the SY55854.
FEATURES
2.5V/3.3V 3.0GHZ DUAL 2x2 CML
CROSSPOINT SWITCH
W/INTERNAL TERMINATION
SuperLite™
SY55858U
APPLICATIONS
■SONET/SDH optical transport
■Backplane redundancy
■Add-drop Multiplexers
Rev.: DAmendment: /0
Issue Date:November 2005
SuperLite is a trademark of Micrel, Inc.
SuperLite™

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Marke: Microchip
Kategorie: Nicht kategorisiert
Modell: SY55858U

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