TFDU4202-TR3 Vishay, TFDU4202-TR3 Datasheet - Page 6

• Manufacturer Part Number: TFDU4202-TR3
• Description: Infrared Transceivers Low Power Trans
• Manufacturer: Vishay

Specifications of TFDU4202-TR3

• Wavelength: 900 nm
• Continual Data Transmission: 115.2 Kbit/s
• Radiant Intensity: 45 mW/sr
• Pulse Width: 1.41 us, 20 us
• Maximum Rise Time: 70 ns, 200 ns
• Maximum Fall Time: 70 ns, 200 ns
• Maximum Forward Current: 125 mA
• Operating Voltage: 2.4 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 25 C
• Dimensions: 7.1 mm x 4.7 mm x 2.8 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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
550 mA current with a fast rise time. If that cannot be
guaranteed an additional capacitor near pin 4 (V
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
when the devices are in shut down mode. The TXD
input is high impedance in shut down mode.
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.
www.vishay.com
6
Component
C1
R1
PP
pin 8 low. The RXD output is floating
ccp
must be able to source up to
Recommended Value
5 Ω ( 2 Ω to 47 Ω)
4.7 µF, 16 V
ccp
)
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
V
CC
Vccp
GND
RXD
TXD
/SD
R1
293D 475X9 016B 2T
Vishay Part Number
R2
C1
8
5, 6
3
7
4
1, 2 IRED Cathode
V
GND
RXD
TXD
V
Document Number 82541
CC
CCP
Rev. 1.8, 05-Dec-05
18187