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| 型号： | TFDT6502E-TR3 |
| 厂商： | Vishay Intertechnology,Inc. |
| 英文描述： | 5015 RR 3#12 PIN PLUG |
| 中文描述： | 快速红外收发器模块系列（4兆飞行情报区/秒）2.6 V至5.5 V工作电压 |
| 文件页数： | 8/17页 |
| 文件大小： | 667K |
| 代理商： | TFDT6502E-TR3 |
TFDU6102E/TFDS6402/TFDS6502E/TFDT6502E
Vishay
Semiconductor
Rev. B1.6, 02–Nov–00
8
www.vishay.com
Document Number 82526
Recommended Circuit Diagram
The only required component for designing an
IrDA 1.3
solution
using
transceivers is a current limiting resistor, R1, to the
IRED. However, depending on the entire system
design and board layout, additional components may
be required (see figure 3).
Vishay
Telefunken
IRED
Cathode
IRED
Anode
Rxd
Vcc
GND
Txd
SD/Mode
Mode
TFDx6x0xE
C2
C1
R2
R1
V
CC2
Rxd
GND
V
CC1
SD/Mode
Txd
Note: outlined components are optional depending
on the quality of the power supply
Figure 3. Recommended Application Circuit
Vishay Telefunken transceivers integrate a sensitive
receiver and a built-in power driver. The combination
of both needs a careful circuit board layout. The use of
thin, long, resistive and inductive wiring should be
avoided. The inputs (Txd, SD/ Mode) and the output
Rxd should be directly (DC) coupled to the I/O circuit.
R1 is used for controlling the current through the
IR emitter. For increasing the output power of the
IRED, the value of the resistor should be reduced.
Similarly, to reduce the output power of the IRED, the
value of the resistor should be increased. For typical
values of R1 see figure 4. For IrDA compliant
operation, a current control resistor of 7.2
is
recommended. For compensating losses of the cos-
metic window, reducing that value to 5.6
is
acceptable. The upper drive current limitation is
dependent on the duty cycle and is given by the
absolute maximum ratings on the data sheet.
R2, C1 and C2 are optional and dependent on the
quality of the supply voltage V
CC
and injected noise.
An unstable power supply with dropping voltage during
transmission may reduce sensitivity (and transmission
range) of the transceiver.
The placement of these parts is critical. It is strongly
recommended to position C2 as near as possible to the
transceiver power supply pins. An electrolytic
capacitor should be used for C1 while a ceramic
capacitor is used for C2.
Table 1. Recommended Application Circuit Components
Component
C1
4.7 F, Tantalum
C2
0.1
μ
F, Ceramic
R1
5 V supply voltage: 7.2
, 0.25 W
(recommend using
two 3.6 , 0.125 W resistors in series)
3.3 V supply voltage: 3.6
, 0.25 W
(recommend using
two 1.8 , 0.125 W resistors in series)
R2
47
, 0.125 W
Recommended Value
Vishay Part Number
293D 475X9 016B 2T
VJ 1206 Y 104 J XXMT
CRCW–1206–3R60–F–RT1
CRCW–1206–1R80–F–RT1
CRCW–1206–47R0–F–RT1
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