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SY55854U PDF даташит

Спецификация SY55854U изготовлена ​​​​«Micrel Semiconductor» и имеет функцию, называемую «2 X 2 PROTECTION CROSSPOINT SWITCH».

Детали детали

Номер произв SY55854U
Описание 2 X 2 PROTECTION CROSSPOINT SWITCH
Производители Micrel Semiconductor
логотип Micrel Semiconductor логотип 

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SY55854U Даташит, Описание, Даташиты
www.DataSheet4U.com
Micrel, Inc.
2 X 2 PROTECTION
CROSSPOINT SWITCH
SuperLite™
SuperSLYit5e5854U
SY55854U
FEATURES
s Guaranteed fMAX >2.5GHz over temperature
s 2.3V to 5.7V power supply
s Non-blocking “switch architecture”
s Guaranteed <15ps channel-to-channel skew
s Guaranteed <480ps propagation delay over
temperature
s Configurable as 2:1 mux, 1:2 fan-out buffer, dual
buffer, or 2 x 2 switch
s Accepts CML, PECL, LVPECL inputs
s Fully differential inputs/outputs
s Source terminated CML outputs for fast edge rates
s Wide operating temperature range: –40°C to +85°C
s Available in a tiny 16-pin EPAD-QSOP package
SuperLite™
DESCRIPTION
The SY55854U is a fully differential, CML, 2 x 2-
crosspoint switch. The non-blocking design allows any
input to be connected to any output. Varying the state of
the select inputs allows SY55854U to be used in backup,
fault tolerant, protection, and backplane distribution
applications.
SY55854U inputs can be terminated with a single
resistor between the true and the complement pins of a
given input.
The SY55854U is a member of Micrel’s new
SuperLite™ family of high-speed logic devices. This family
features very small packaging, high signal integrity, and
flexible supply voltage operation.
FUNCTIONAL BLOCK DIAGRAM
S0
S1
D0 0 S
Q0
D1 1
0S
Q1
1
APPLICATIONS
s High-speed logic
s Data communications systems
s Wireless communications systems
s Telecom systems
s Backplane redundancy
SuperLite is a trademark of Micrel, Inc.
M9999-041206
[email protected] or (408) 955-1690
1
Rev.: D Amendment: /0
Issue Date: April 2006









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SY55854U Даташит, Описание, Даташиты
Micrel, Inc.
SuperLite™
SY55854U
PACKAGE/ORDERING INFORMATION
GND 1
D0 2
/D0 3
S0 4
/S0 5
/D1 6
D1 7
GND 8
QSOP
16 VCC
15 Q0
14 /Q0
13 S1
12 /S1
11 /Q1
10 Q1
9 VCC
16-Pin EPAD-QSOP
(Y16-1)
Ordering Information(1)
Part Number
Package Operating
Type
Range
Package
Marking
Lead
Finish
SY55854UYI
SY55854UYITR(2)
SY55854UYY(3)
Y16-1
Y16-1
Y16-1
SY55854UYYTR(2, 3) Y16-1
Industrial
Industrial
Industrial
Industrial
854U
Sn-Pb
854U
Sn-Pb
854U with
NiPdAu
Pb-Free bar line indicator Pb-Free
854U with
NiPdAu
Pb-Free bar line indicator Pb-Free
Notes:
1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC Electricals only.
2. Tape and Reel.
3. Pb-Free package recommended for new designs.
PIN DESCRIPTION
Pin Number
2, 3
Pin Name
D0, /D0
4, 5 S0, /S0
6, 7 /D1, D1
1, 8
9, 16
10, 11
12, 13
GND
VCC
Q1, /Q1
/S1, S1
14, 15
/Q0, Q0
Pin Function
CML/PECL/LVPECL Input (Differential). This is one of the data inputs to the
crosspoint. It will be switched either to the Q0 output, the Q1 output, both outputs, or
neither output, depending on the state of the S0 and S1 inputs.
CML/PECL/LVPECL Input (Differential). This selects input chooses which data input
switches to the Q0 output. S0 logic low selects the D0 input, while S0 logic high
selects the B input.
CML/PECL/LVPECL Input (Differential). This is the other data input to the
crosspoint. It will be switched either to the Q0 output, the Q1 output, both outputs, or
neither output, depending on the state of the S0 and S1 inputs.
Ground.
Power Supply.
CML Output (Differential). This is the other output from the crosspoint. Input S1
selects either the D0 or D1 input to be switched to this output.
CML/PECL/LVPECL Input (Differential). This select input chooses which data input
switches to the Q1 output. S1 logic low selects the D0 input, while S1 logic high
selects the D1 input.
CML Output (Differential). This is one output from the crosspoint. Input S0 selects
either the D0 or the D1 input to be switched to this output.
M9999-041206
[email protected] or (408) 955-1690
2









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SY55854U Даташит, Описание, Даташиты
Micrel, Inc.
SuperLite
SY55854U
FUNCTIONAL DESCRIPTION
Establishing Static Logic Inputs
The true pin of an input pair is internally biased to ground
through a 75kresistor. The complement pin of an input
pair is internally biased halfway between VCC and ground
by a voltage divider consisting of two 75kresistors. In this
way, unconnected inputs appear as logic zeros. To keep an
input at static logic zero at VCC > 3.0V, leave both inputs
unconnected. For VCC 3.0V, connect the complement
input to VCC and leave the true input unconnected. To make
an input static logic one, connect the true input to VCC,
leave the complement input unconnected. These are the
only two safe ways to cause inputs to be at a static value.
In particular, no input pin should be directly connected to
ground. All NC (no connect) pins should be unconnected.
VCC X
NC /X
NC X
NC /X
Figure 1. Hard Wiring a Logic 1(1)
VCC > 3.0V
Note 1. X is either D0, D1, S0, or S1 input. /X is either /D0, /D1, /S0, or
/S1 input.
NC X
VCC /X
VCC 3.0V
Figure 2. Hard Wiring a Logic 0(1)
Usage
SY55854U is very versatile. Tying its select inputs in
various ways varies its functionality. For example, tying the
select inputs together turns SY55854U into a redundant
distributor. Either input will be switched to both outputs
simultaneously. This is very useful in redundant backplane
applications. By cross-tying the select inputs, SY55854U
becomes a true crosspoint, selecting between straight
throughand cross connectedoperation. Also, using the
select inputs independently, SY55854U functions as two
multiplexers. Setting the select inputs to static values turns
SY55854U into a dual buffer, or a fan-out buffer.
To make larger crosspoints, cascade SY55854U devices,
either in a tree or in a Banyan structure, as appropriate for
your application.
M9999-041206
[email protected] or (408) 955-1690
3










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