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參數(shù)資料
| 型號： | TFDU4202-TR3 |
| 廠商： | Vishay Intertechnology,Inc. |
| 英文描述： | Integrated Low Profile Transceiver Module for Telecom Applications - IrDA Standard |
| 中文描述： | 集成的收發(fā)器模塊超薄電信應(yīng)用-紅外標(biāo)準(zhǔn) |
| 文件頁數(shù)： | 6/13頁 |
| 文件大?。?/td> | 214K |
| 代理商： | TFDU4202-TR3 |
www.vishay.com
6
Document Number 82541
Rev. 1.8, 05-Dec-05
TFDU4202
Vishay Semiconductors
Application Hints
The TFDU4202 does not need any external compo-
nent when operated with a "clean" power supply. In a
more noisy ambient it is recommended to add a
capacitor C1 and a resistor R1 for noise suppression.
A combination of a tantalum with a ceramics capacitor
will be efficient to attenuate both, RF and LF. The
power supply V
ccp
must be able to source up to
550 mA current with a fast rise time. If that cannot be
guaranteed an additional capacitor near pin 4 (V
ccp
)
should be included. The value is depended on the
power supply quality. A good choice between 4.7 μF
and 10 μF.
Shut down
The TFDU4202 can be shut down (disabled) by set-
ting the V
PP
pin 8 low. The RXD output is floating
when the devices are in shut down mode. The TXD
input is high impedance in shut down mode.
Latency
The receiver is in specified conditions after the
defined latency. In a UART related application after
that time (typically 50 μs) the receiver buffer of the
UART must be cleared. Therefore the transceiver has
to wait at least the specified latency after receiving the
last bit before starting the transmission to be sure that
the corresponding receiver is in a defined state.
For more application circuits, see IrDC Design Guide
and TOIM4232 data sheet.
Recommended Circuit Diagram
Table
Recommended Application Circuit Components
This is a recommendation for a combination to start with to exclude power supply effects.
Optimum, from a costs point of view, to work without both.
R1
V
ccp
RXD
C1
G
N
D
V
CC
/SD
TXD
5, 6
8
3
7
4
G
N
D
V
CC
RXD
TXD
V
CCP
R2
1, 2 IRED Cathode
1
8
1
8
7
Component
C1
R1
Recommended Value
4.7 μF, 16 V
5
Ω
( 2
Ω
to 47
Ω
)
Vishay Part Number
293D 475X9 016B 2T
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| TFDU4202-TR3 | 制造商:Vishay Semiconductors 功能描述:LED Lamp |
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| TFDU4203-TR3 | 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:Integrated Low Profile Transceiver Module for Telecom Applications ? IrDA Standard |
| TFDU4204 | 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:Integrated Low Profile Transceiver Module for Telecom Applications - IrDA Standard |
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