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SY55858U Datasheet(PDF) 1 Page - Micrel Semiconductor

Part No. SY55858U
Description  2.5V/3.3V 3.0GHZ DUAL 2 x 2 CML CROSSPOINT SWITCH W/INTERNAL TERMINATION
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

SY55858U Datasheet(HTML) 1 Page - Micrel Semiconductor

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1
SuperLite™
SY55858U
Micrel
DESCRIPTION
s Guaranteed AC parameters over temperature:
•f
MAX > 3.0GHz (3Gbps)
•t
r/ tf < 120ps
• Within-device skew < 25ps
s Non-blocking “switch architecture”
s Configurable as dual 2:1 mux, dual 1:2 fanout buffer,
1:4 fanout buffer, quad buffer, or dual 2 x 2 switch
s 50
compatible outputs
s Unique input termination and V
T pin for DC-coupled
and AC-coupled input signals–CML or PECL
s Fully differential inputs/outputs
s TTL/CMOS compatible control logic
s Wide supply voltage range: 2.3V to 3.6V
s Wide operating temperature range: –40
°C to +85°C
s Available in 32-pin EPAD-TQFP package
The SY55858U is a low-voltage, high-speed dual 2 x 2
crosspoint switch with a flexible input that accepts CML
or PECL, and a 50
Ω 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 DB0–1) 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
2 x 2 crosspoint, consider the SY55854.
FEATURES
2.5V/3.3V 3.0GHZ DUAL 2 x 2 CML
CROSSPOINT SWITCH
W
/INTERNAL TERMINATION
SuperLite™
SY55858U
APPLICATIONS
s SONET/SDH optical transport
s Backplane redundancy
s Add-drop Multiplexers
Rev.: C
Amendment: /1
Issue Date:
September2003
SuperLite is a trademark of Micrel, Inc.
32 31 30 29 28 27 26 25
9
1011 12 131415 16
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
DB1
VTB1
/DB1
SELB0
DB0
VTB0
/DB0
SELB1
GND
VCC
QA0
/QA0
VCC
QA1
/QA1
VCC
Top View
EPAD-TQFP
H32-1
PIN CONFIGURATION
SuperLite™


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