LICAL-TRC-MT Linx Technologies Inc, LICAL-TRC-MT Datasheet - Page 3

• Manufacturer Part Number: LICAL-TRC-MT
• Description: IC TRANSCODER MT BI-DIR 20-SSOP
• Manufacturer: Linx Technologies Inc
• Series: MTr
• Type: Transcoderr

Specifications of LICAL-TRC-MT

• Package / Case: 20-SSOP
• Applications: RF, IR
• Mounting Type: Surface Mount
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: LICAL-TRC-MTTR

Figure 4: MT Series Transcoder Pin Assignments
V
D0-D7
CRT/LRN
ENC_SEL
SER_IO
CONFIRM
TR_PDN
TR_SEL
TR_DATA
MODE_IND
SEL_BAUD
LATCH
GND
NOTE:
None of the input lines have internal pull-up or pull-down resistors. The input lines must always be in a known
state (either GND or V
the input lines are never floating, either by using external resistors, by tying the lines directly to GND or V
or by use of other circuits to control the line state.
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PIN ASSIGNMENTS
CC
Pin Name
10
1
2
3
4
5
6
7
8
9
CC
VCC
D6
D7
CRT/LRN
ENC_SEL
SER_IO
CONFIRM
TR_PDN
TR_SEL
TR_DATA
) at all times or the operation may not be predictable. The designer must ensure that
2, 3, 11-13, 17-19
Pin Number
10
14
15
16
20
LICAL-TRC-MT
1
4
5
6
7
8
9
I/O
I/O
I/O
I/O
—
—
O
O
O
O
I
I
I
I
Create / Learn Mode Activation Line
MODE_IND
SEL_BAUD
Transmission Confirmation Line
Transceiver Power Control Line
Transceiver Mode Control Line
Encoder Only Select Line
Baud Rate Selection Line
Positive Power Supply
Mode Indicator Output
Transceiver Data Line
LATCH
Status Control Lines
Set Latched Outputs
Serial Interface Line
GND
Description
D5
D4
D3
D2
D1
D0
Ground
20
19
18
17
16
15
14
13
12
11
CC
,
PIN DESCRIPTIONS
D0 - D7
CRT/LRN
ENC_SEL
SER_IO
Confirm
TR_PDN
TR_SEL
TR_DATA
MODE_IND
SEL_BAUD
LATCH
The transcoder has eight status lines, D0 through D7. These lines can be set as
either inputs to record the state of switches or as outputs which will reproduce
switch states upon reception of a valid transmission.
When this line goes high, the transcoder will enter Learn Mode. If it is held high
for ten seconds, the transcoder will clear its memory. If it goes high at the same
time as the ENC_SEL line, the transcoder will enter Create Mode. If it goes high
at the same time as the SER_IO line, the transcoder will enter Serial Mode.
If this line is tied high, it will operate as an encoder only. If it is tied low, the
transcoder will default to a decoder until it is set as a transcoder in Create Mode.
This line is used for the Serial Interface Engine, which allows the transcoder to
be programmed by an external device. The transcoder will also use this line to
output the ID of the originating transcoder, status line states, and custom data.
This line will go high when the transcoder receives a confirmation that its
transmission was received correctly.
This line can be used to automatically control power to an external transceiver.
When waiting for data the transcoder will toggle power to a transceiver at a 10%
on to 90% off ratio. The times are determined by the selected baud rate.
This line will toggle an external transceiver between transmit mode (high) and
receive mode (low).
This line will send data to and receive data from an external transceiver.
This line will switch when a valid transmission is received, when Learn Mode or
Create Mode is entered, and when the memory is cleared. This allows for the
connection of a LED to indicate to the user that these events have taken place.
This line is used to select the baud rate of the serial data stream. If the line is
high, the baud rate will be 28,800bps, if it is low, the baud rate will be 9,600bps.
The baud rate must be set before power up. The transcoder will not recognize
any change in the baud rate setting after it is on.
If this line is low, then the data outputs will be momentary (active for as long as
a valid signal is received). If this line is high, the outputs will be latched (when a
signal is received to make a particular data line high, it will remain high until
another transmission is received instructing it to go low) by default, but individual
status lines can be set as latched or momentary through the SIE.
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