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參數(shù)資料
| 型號： | TFDS3000 |
| 英文描述： | CONNECTOR ACCESSORY |
| 中文描述： | 連接器附件 |
| 文件頁數(shù)： | 6/10頁 |
| 文件大小： | 221K |
| 代理商： | TFDS3000 |
TFDS3000
TELEFUNKEN Semiconductors
Rev. A6, 15-Aug-96
Preliminary Information
6 (10)
TFDS3000 Recommended Circuit Diagram
8
7
6
5
1
2
3
4
IRED
Cathode
Rxd
V
CC
GND
IRED
Anode
Txd
SD
NC
TFDS3000
C
2
220 nF
C
1
4.7 F
2.2 k
R
4
C
3
220 nF
100
R
2
5
R
3
V
S
Rxd
Txd
GND
95 11800
Figure 8.
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.
The load resistor R1 is optional when longer cables must
be driven. Internally, RxD is connected to V
CC
by a 20 k
load.
C1 and C2 are dependent on the quality of the supply
voltage. A combination of 6.8 F with 100 nF will also
work in most cases.
Pin
1
2
3
4
5
6
7
8
–
Pin Name
Description
I/O
Active
IRED cathode
Rxd
Vcc
GND
NC
NC
Txd
IRED anode
2 guide pins
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
O
LOW
I
HIGH
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