TFDS3000 Ver la hoja de datos (PDF) - Temic Semiconductors
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TFDS3000 Datasheet PDF : 10 Pages
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TFDS3000
TFDS3000 Recommended Circuit Diagram
VS
Rxd
Txd
220 nF
C3
R4
2.2 kW
GND
R2
100 W
TFDS3000
1
IRED
Cathode
IRED
Anode
R3
5W
8
2 Rxd
Txd 7
C1
4.7 mF
C2
220 nF
3 VCC
4 GND
SD 6
NC 5
Figure 8.
95 11800
Txd is recommended to be dc-coupled to the driving
circuitry. R4 and C3 are only necessary if the input signal
is active for longer periods. This might occur under
certain conditions when the circuit is conncted to the NSC
or SMC Super I/OsTM. See National Semiconductors
application note.
R3 is used for controlling the current through the IR
emitter. To increase the output power, reduce the value.
To reduce the output power, increase the value as
described in the TEMIC IrDA Design Guide.
W The load resistor R1 is optional when longer cables must
be driven. Internally, RxD is connected to VCC by a 20 k
load.
C1 and C2 are dependent on the quality of the supply
m voltage. A combination of 6.8 F with 100 nF will also
work in most cases.
Pin
Pin Name
1 IRED cathode
2 Rxd
3 Vcc
4 GND
5 NC
6 NC
7 Txd
8 IRED anode
– 2 guide pins
Description
IRED cathode, internally connected to driver transistor
Received data
Supply voltage
Ground
No connection
No connection
Data to be transmitted
IRED anode
Internally connected to ground
I/O Active
O LOW
I HIGH
6 (10)
TELEFUNKEN Semiconductors
Preliminary Information
Rev. A6, 15-Aug-96
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