SY55854UYYTR [MICREL]
2 X 2 PROTECTION CROSSPOINT SWITCH; 2× 2的保护交叉点开关
| 型号： | SY55854UYYTR |
| 厂家： | 
MICREL SEMICONDUCTOR |
| 描述： | 2 X 2 PROTECTION CROSSPOINT SWITCH |
| 文件： | 总7页 (文件大小：40K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SuperLite™
SY55854U
M
2 X 2 PROTECTION
CROSSPOINT SWITCH
FEATURES
■ Guaranteed f
>2.5GHz over temperature
MAX
SuperLite™
■ 2.3V to 5.7V power supply
■ Non-blocking “switch architecture”
■ Guaranteed <15ps channel-to-channel skew
DESCRIPTION
■ Guaranteed <480ps propagation delay over
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.
temperature
■ Configurable as 2:1 mux, 1:2 fan-out buffer, dual
buffer, or 2 x 2 switch
■ Accepts CML, PECL, LVPECL inputs
■ Fully differential inputs/outputs
■ Source terminated CML outputs for fast edge rates
■ Wide operating temperature range: –40°C to +85°C
■ Available in a tiny 16-pin EPAD-QSOP package
APPLICATIONS
FUNCTIONAL BLOCK DIAGRAM
■ High-speed logic
S0
S1
■ Data communications systems
■ Wireless communications systems
■ Telecom systems
D0
D1
S
S
0
1
Q0
Q1
■ Backplane redundancy
0
1
SuperLite is a trademark of Micrel, Inc.
M9999-041206
Rev.: D
Amendment: /0
1
Issue Date: April 2006
hbwhelp@micrel.com or (408) 955-1690
SuperLite™
SY55854U
Micrel, Inc.
PACKAGE/ORDERING INFORMATION
Ordering Information(1)
Package Operating
Package
Marking
Lead
Finish
GND
D0
1
2
3
4
5
6
7
8
16 VCC
15 Q0
14 /Q0
13 S1
Part Number
Type
Y16-1
Y16-1
Y16-1
Range
SY55854UYI
Industrial
Industrial
Industrial
854U
854U
Sn-Pb
Sn-Pb
/D0
S0
SY55854UYITR(2)
SY55854UYY(3)
QSOP
/S0
/D1
D1
12 /S1
11 /Q1
10 Q1
854U with
NiPdAu
Pb-Free bar line indicator Pb-Free
854U with NiPdAu
Pb-Free bar line indicator Pb-Free
SY55854UYYTR(2, 3)
Y16-1
Industrial
GND
9
VCC
Notes:
1. Contact factory for die availability. Dice are guaranteed at T = 25°C, DC Electricals only.
A
16-Pin EPAD-QSOP
(Y16-1)
2. Tape and Reel.
3. Pb-Free package recommended for new designs.
PIN DESCRIPTION
Pin Number
Pin Name
Pin Function
2, 3
D0, /D0
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.
4, 5
6, 7
S0, /S0
/D1, D1
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.
1, 8
9, 16
10, 11
GND
VCC
Ground.
Power Supply.
Q1, /Q1
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.
12, 13
/S1, S1
/Q0, Q0
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.
14, 15
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
hbwhelp@micrel.com or (408) 955-1690
2
SuperLite™
SY55854U
Micrel, Inc.
FUNCTIONAL DESCRIPTION
Establishing Static Logic Inputs
input at static logic zero at V
> 3.0V, leave both inputs
CC
unconnected. For V
≤ 3.0V, connect the complement
CC
The true pin of an input pair is internally biased to ground
through a 75kΩ resistor. The complement pin of an input
input to V and leave the true input unconnected. To make
CC
an input static logic one, connect the true input to V
,
CC
pair is internally biased halfway between V
and ground
CC
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.
by a voltage divider consisting of two 75kΩ resistors. In this
way, unconnected inputs appear as logic zeros. To keep an
VCC
NC
X
NC
NC
X
/X
/X
(1)
VCC > 3.0V
Figure 1. Hard Wiring a Logic “1”
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
(1)
Figure 2. Hard Wiring a Logic “0”
Usage
becomes a true crosspoint, selecting between “straight
through” and “cross connected” operation. 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.
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
M9999-041206
hbwhelp@micrel.com or (408) 955-1690
3
SuperLite™
SY55854U
Micrel, Inc.
TRUTH TABLE
S0
0
S1
0
Q0
D0
Q1
D0
Function
Fan-Out Buffer
Dual Buffer
0
1
D0
D1
1
0
D1
D0
Dual Buffer
1
1
D1
D1
Fan-Out Buffer
Redundant Distribution
Crosspoint
CTL
CTL
CTL
/CTL
Same
Opposite
Same
Opposite
CML TERMINATION
All inputs accept the output from any other member of speed design practices be adhered to. SY55854U inputs
this family. All outputs are source terminated 100Ω CML are designed to accept a termination resistor between the
differential drivers as shown in Figures 3 and 4. SY55854U true and complement inputs of a differential pair. 0402 form
expects the inputs to be terminated, and that good high factor chip resistors will fit with some trace fanout.
vcc
vcc
vcc
50Ω
100Ω
100Ω
50Ω
100Ω
100Ω
100Ω 100Ω
100Ω
100Ω
50Ω
50Ω
100Ω
50Ω
50Ω
8mA
8mA
SY55854U
SY55854U
Figure 3a. Differentially Terminated
Figure 3b. Individually Terminated
(50Ω Load CML Output)
(50Ω Load CML Output)
VCC
100Ω
100Ω
100Ω
200Ω
100Ω
8mA
SY55854U
Figure 4. 100Ω Load CML Output
M9999-041206
hbwhelp@micrel.com or (408) 955-1690
4
SuperLite™
SY55854U
Micrel, Inc.
(1)
ABSOLUTE MAXIMUM RATINGS
Symbol
Rating
Power Supply Voltage
Value
–0.5 to +6.0
Unit
V
VCC
VIN
Input Voltage
–0.5 to VCC +0.5
VCC –1.0 to VCC +0.5
–40 to +85
V
VOUT
TA
CML Output Voltage
V
Operating Temperature Range
Lead Temperature (soldering, 20 sec.)
Storage Temperature Range
°C
°C
°C
TLEAD
Tstore
260°C
–65 to +150
Note 1. Permanent device damage may occur if absolute maximum ratings are exceeded. This is a stress rating only and functional
operation is not implied at conditions other than those detailed in the operational sections of this data sheet. Exposure to absolute
maximum ratlng conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
V
= 2.3V to 5.7V; GND = 0V
CC
TA = –40°C
Min. Max.
TA = 0°C
TA = +25°C
TA = +85°C
Symbol
VCC
Parameter
Min.
Max.
5.7
Min.
Max.
5.7
Min.
Max.
5.7
Unit
V
Power Supply Voltage
Power Supply Current
2.3
5.7
60
2.3
2.3
2.3
ICC
—
—
60
—
60
—
60
mA
CML DC ELECTRICAL CHARACTERISTICS
(2)
V
= 2.3V to 5.7V; GND = 0V; T = –40°C to +85°C
CC
A
Symbol
Parameter
Min.
100
Typ.
—
Max.
—
Unit
Condition
VID
Differential Input Voltage
Input HIGH Voltage
Input LOW Voltage
mV
V
VIH
1.6
—
VCC
VIL
1.5
—
VCC – 0.1
VCC
V
VOH
VOL
VOS
Output HIGH Voltage
Output LOW Voltage
Output Voltage Swing(3)
VCC – 0.020
VCC – 0.97
0.700
VCC – 0.010
VCC – 0.825
V
No Load
No Load
No Load
VCC – 0.660
0.950
V
0.800
0.400
0.200
V
100Ω Environment(5)
50Ω Environment(4)
RDRIVE
Output Source Impedance
80
100
120
Ω
Note 2. Equilibrium temperature.
Note 3. Actual voltage levels and differential swing will depend on customer termination scheme. Typically, a 400mV swing is available in the 100Ω
environment and a 200mV swing in the 50Ω environment. Refer to the “CML Termination” diagram for more details.
Note 4. See Figure 3a and 3b.
Note 5. See Figure 4.
M9999-041206
hbwhelp@micrel.com or (408) 955-1690
5
SuperLite™
SY55854U
Micrel, Inc.
(1, 2)
AC ELECTRICAL CHARACTERISTICS
V
= 2.3V to 5.7V; GND = 0V; T = –40°C to +85°C
A
CC
Symbol
fMAX
Parameter
Min.
2.5
—
Typ.
—
Max.
—
Unit
GHz
ps
Condition
Max. Operating Frequency
tPD
Propagation Delay,
—
400
S0, S1, D0, D1 to Q0, Q1
tSKEW
Within-Device Skew(3)
Part-to-Part Skew (Diff.)
—
—
—
—
15
100
ps
ps
tr
tf
CML Output Rise/Fall Times
(20% to 80%)
—
—
150
Note 1. Specification for packaged product only.
Note 2. Tested using environment of Figure 3b, 50Ω load CML output.
Note 3. Worst case difference between Q0 and Q1 from either A or B, when both outputs come from the same input
M9999-041206
hbwhelp@micrel.com or (408) 955-1690
6
SuperLite™
SY55854U
Micrel, Inc.
16-PIN EPAD-QSOP (Y16-1)
PIN 1
DIMENSIONS:
INCHES (MM)
0.157 (3.99)
0.150 (3.81)
0.009 (0.2286)
REF
0.012 (0.30)
0.008 (0.20)
0.025 (0.635)
BSC
45°
0.0098 (0.249)
0.0075 (0.190)
0.0098 (0.249)
0.0040 (0.102)
8°
0°
0.196 (4.98)
0.189 (4.80)
0.050 (1.27)
0.016 (0.40)
SEATING 0.0688 (1.748)
PLANE
0.0532 (1.351)
0.2284 (5.801)
0.2240 (5.690)
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB http://www.micrel.com
The information furnished by Micrel in this datasheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use.
Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can
reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into
the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s
use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser’s own risk and Purchaser agrees to fully indemnify
Micrel for any damages resulting from such use or sale.
© 2006 Micrel, Incorporated.
M9999-041206
hbwhelp@micrel.com or (408) 955-1690
7
相关型号：
©2020 ICPDF网 联系我们和版权申明