LICAL-DEC-LS001 [ETC]
LS SERIES ENCODER / DECODER DATA GUIDE; LS系列编码器/解码器数据手册
| 型号： | LICAL-DEC-LS001 |
| 厂家： | 
ETC |
| 描述： | LS SERIES ENCODER / DECODER DATA GUIDE |
| 文件： | 总5页 (文件大小：115K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
HIGH-PERFORMANCE
LS SERIES
ENCODER/DECODER
WIRELESS MADE SIMPLE ®
LS SERIES ENCODER / DECODER DATA GUIDE
DESCRIPTION
The Linx LS Series encoders and
0.313
(7.04)
0.250
(6.35)
decoders provide an extremely simple, yet
reliable, protocol for the transmission of
switch closures or button contacts. This
series can find use in any basic, low-cost
0.373
(9.46)
0.012
(0.29)
remote control application. Simply take a
10˚
data line high on the encoder and a
corresponding line will go high on the
0.370
(9.40)
10˚
decoder. No programming or addressing is
required, making integration of the LS
extremely easy while maintaining a robust
link.
0.130
(3.30)
0.155
(3.94)
0.015
(0.38)
0.130
(3.30)
0.058
(1.46)
FEATURES
0.100
(2.54)
0.018
(0.46)
No addressing or programming
Easy to use
Figure 1: Package Dimensions
Very low current consumption
Four data lines
Easy serial interface
Selectable baud rates
High noise immunity
Standard PDIP package
0.313 (7.94)
0.100 (2.54)
APPLICATIONS INCLUDE
0.018 (0.46)
Range Testing
Simple Remote Control
Wire Elimination
Figure 2: PCB Layout Dimensions
Remote Status Monitoring
Lighting Control
ORDERING INFORMATION
PART #
DESCRIPTION
LICAL-ENC-LS001
LICAL-DEC-LS001
LS Encoder
LS Decoder
LS encoders / decoders supplied in tubes of 60 pcs.
All parts are RoHS compliant.
Revised 1/28/08
ELECTRICAL SPECIFICATIONS
PIN ASSIGNMENTS
Parameter
Designation
Min.
Typical
Max.
Units
Notes
LICAL-ENC-LS001
VCC
GND
POWER SUPPLY
Operating Voltage
Supply Current:
At 2.0V VCC
1
2
3
4
8
7
6
5
VCC
ICC
2.0
–
5.5
VDC
–
DATA_OUT
D3
D0
D1
D2
–
–
–
340
500
800
450
700
µA
µA
µA
1
1
1
At 3.0V VCC
At 5.0V VCC
1,100
SEL_BAUD
Power-Down Current:
At 2.0V VCC
IPDN
–
–
–
0.99
1.2
700
770
995
nA
nA
nA
At 3.0V VCC
LICAL-DEC-LS001
VCC
GND
At 5.0V VCC
2.9
1
2
3
4
8
ENCODER / DECODER SECTION
Input Low
7
6
5
VIL
VIH
VOL
VOH
–
0.0
–
–
–
–
–
–
0.15 x VCC
V
V
2
3
DATA_IN
D3
D0
D1
D2
Input High
0.8 x VCC
VCC
0.6
–
Output Low
–
V
Output High
VCC - 0.7
V
SEL_BAUD
Input Sink Current
Output Drive Current
ENVIRONMENTAL
Operating Temperature Range
–
–
25
25
mA
mA
–
Figure 3: LS Series Encoder and Decoder Pin Assignments
–
-40
–
+125
°C
Table 1: Electrical Specifications
ENCODER PIN ASSIGNMENTS
Notes
1. Current consumption with no active loads.
2. For 3V supply, (0.15 x 3.0) = 0.45V max.
3. For 3V supply, (0.8 x 3.0) = 2.4V min.
Pin Name
Pin Number
I/O
—
O
I
Description
VCC
1
Positive Power Supply
Serial Data Output
Baud Rate Selection Pin
Ground
DATA_OUT
SEL_BAUD
GND
2
ABSOLUTE MAXIMUM RATINGS
4
8
Supply Voltage VCC
-0.3
to
+6.5
VDC
Any Input or Output Pin
Max. Current Sourced By Data Pins
Max. Current Sunk By Data Pins
Max. Current Into VCC
-0.3
to VCC + 0.3 VDC
25
25
250
300
to
—
I
mA
mA
mA
mA
°C
D0-D3
3, 5, 6, 7
Data Input Pins
Max. Current Out Of GND
Operating Temperature
Storage Temperature
-40
-65
+125
+150
to
°C
DECODER PIN ASSIGNMENTS
*NOTE* Exceeding any of the limits of this section may lead to permanent
damage to the device. Furthermore, extended operation at these maximum
ratings may reduce the life of this device.
Pin Name
Pin Number
I/O
—
I
Description
Positive Power Supply
Serial Data Input
Baud Rate Selection Pin
Ground
VCC
1
DATA_OUT
SEL_BAUD
GND
2
*CAUTION*
4
8
I
This product is a static-sensitive component. Always wear an ESD
wrist strap and observe proper ESD handling procedures when
working with this device. Failure to observe this precaution may
result in device damage or failure.
—
O
D0-D3
3, 5, 6, 7
Data Output Pins
Page 3
Page 2
PIN DESCRIPTIONS
DECODER OPERATION
VCC
The LS Series decoder begins by waiting for the DATA_IN line to transition from
low to high. At that point, the decoder will accept the data, check it for errors, and
confirm that the bytes are valid. If the data pass all of the checks, then the data
bits are output on the decoder’s data lines. If any of these checks fail, then the
decoder will ignore the received packet and look for the next one.
This is the positive power supply.
DATA_OUT
The encoder will output a serial data stream on this line.
DATA_IN
The decoder has a built-in debounce circuit to guard against signal cutout. This
is a timer that maintains the current state of the data lines until changed by a
valid packet or until no valid packets are received for 131mS. After 131mS, the
decoder pulls all of the data lines to ground and goes back to sleep. This helps
protect devices attached to the decoder by smoothing out the output response.
Rapid switching resulting from lost packets could cause damage to devices,
such as relays or motors, that may be controlled by the decoder.
The decoder will monitor this line for data.
SEL_BAUD
This line is used to select the baud
rate of the serial data stream. The
state of the line allows the selection of
one of two possible baud rates, as
shown in the adjacent table.
SEL_BAUD
Baud Rate (bps)
2,400
0
1
9,600
This debounce circuit helps in noisy environments and at the range limit of the
link where lost packets and cutouts are more frequent. The drawback is that
there is a 131mS lag time between the end of the transmission and when the
data lines are turned off. This is generally not a problem with manual remote
control applications, but must be taken into account in applications where timing
is critical.
Table 2: Baud Rate Selection Table
GND
These lines are connected to ground.
Data Lines
The LS Series has three data lines, D0 through D3. When any of these lines
goes high on the encoder, their states are recorded, encoded for transmission,
and then reproduced on the outputs of the decoder.
TYPICAL APPLICATIONS
LS Series encoders and decoders would typically be used in remote control
applications to register button presses and activate circuitry in a remote device.
Figure 4 shows an example application circuit.
PRODUCTION CONSIDERATIONS
LS Series encoders and decoders are implemented in an industry standard 8-
Lead Plastic Dual In-Line Package (8-PDIP). The package and layout
dimensions are shown on Page 1. These components are leaded through-hole
parts and may be hand- or wave-soldered.
An SPDT switch is used in both circuits to set the baud rate. This switch will pull
the BAUD_SEL line to either ground or VCC for selection of one of the baud rates
listed in the Pin Descriptions section. The baud rate on both sides must match in
order for the encoder and decoder to correctly operate.
THEORY OF OPERATION
Two pushbutton switches are connected to the data lines on the encoder. Since
none of the data lines have internal pull resistors, external resistors are used to
pull the data lines to ground when not in use. Without these resistors, the state
of the data lines can not be guaranteed and performance may not be predictable.
In this example, only two data lines are used, so the other two are tied directly to
ground. With this circuit, pressing either of the buttons will cause the data line to
go high and initiate a transmission.
The Linx LS Series encoder and decoder are designed to register button presses
or contact closures. When a pin goes high on the encoder, a signal is sent to
make a corresponding pin go high on the decoder. The outputs of the decoder
can then be used to activate almost anything, from driving a LED or buzzer to
activating digital circuitry.
The LS Series does not require any programming or addressing and its simplicity
makes it a good choice for basic remote control devices that are designed to turn
something on and off.
On the decoder side, a piezoelectric buzzer is attached directly to the D1 line.
When the button connected to the D1 line on the encoder is pressed, the buzzer
will sound. The D0 line is connected to a relay through a transistor buffer. The
decoder can output 25mA, which is sufficient to drive small relays, but may not
work for larger coils. The transistor is used to provide the higher current and
voltage required to activate a larger relay. With this circuit, when the D0 line goes
high, it will turn on the transistor, which will energize the relay and connect the
terminals.
ENCODER OPERATION
Upon power-up, the encoder enters sleep mode. As soon as one of the data lines
goes high, it will wake up and begin the transmit process.
First, the encoder will record the state of the data lines, encode for error
correction, and assemble the packet. It will then output the packet on the
DATA_OUT line. The encoder will repeat the transmission process for as long as
one of the data lines is high, otherwise it will go back to sleep. It will update the
state of the data lines with each packet, and it will finish the current transmission
even if all of the lines are pulled to ground.
Page 4
Page 5
VCC
ENCODER
DECODER
Start Up
VCC
200k
Sleep Mode
1
2
3
4
8
7
6
5
VCC
To Transmitter
VCC
GND
D0
GND
GND
GND
DATA_OUT
D3
RELAY OUT
VCC
GND
D1
Start Up
SEL_BAUD
D2
200k
LICAL-ENC-LS001
Is the
DATA_IN line
high?
GND
NO
GND
VCC
Sleep Mode
2N2222
RELAY-SPDT
8
YES
VCC
VCC
D3
GND
GND
GND
7
6
5
D0
D1
2.2k
10k
Start Time-Out
timer
3
4
VCC
GND
NO
Are any data
lines high?
SEL_BAUD D2
BUZZER
LICAL-DEC-LS001
GND
Figure 4: LS Series Application Circuits
YES
YES
131mS Time-Out?
Get the data from
the data lines
ONLINE RESOURCES
®
NO
Encode for error
correction
Receive data
www.linxtechnologies.com
• Latest News
Create the packet
Send the packet
Check data for
errors
• Data Guides
• Application Notes
• Knowledgebase
• Software Updates
NO
Is the data
valid?
If you have questions regarding any Linx product and have Internet access,
make www.linxtechnologies.com your first stop. Our website is organized in an
intuitive format to immediately give you the answers you need. Day or night, the
Linx website gives you instant access to the latest information regarding the
products and services of Linx. It’s all here: manual and software updates,
application notes, a comprehensive knowledgebase, FCC information, and much
more. Be sure to visit often!
YES
Output the data on
the data lines.
Figure 5: LS Series Encoder Flowchart
Figure 6: LS Series Decoder Flowchart
Page 6
Page 7
WIRELESS MADE SIMPLE ®
U.S. CORPORATE HEADQUARTERS
LINX TECHNOLOGIES, INC.
159 ORT LANE
MERLIN, OR 97532
PHONE: (541) 471-6256
FAX: (541) 471-6251
www.linxtechnologies.com
Disclaimer
Linx Technologies is continually striving to improve the quality and function of its products. For this reason,
we reserve the right to make changes to our products without notice. The information contained in this
Overview Guide is believed to be accurate as of the time of publication. Specifications are based on
representative lot samples. Values may vary from lot-to-lot and are not guaranteed. "Typical" parameters can
and do vary over lots and application. Linx Technologies makes no guarantee, warranty, or representation
regarding the suitability of any product for use in any specific application. It is the customer's responsibility
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© 2008 by Linx Technologies, Inc. The stylized Linx logo,
Linx, “Wireless Made Simple”, CipherLinx, and the stylized
CL logo are the trademarks of Linx Technologies, Inc.
Printed in U.S.A.
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