TFDU4301-TT1 Vishay, TFDU4301-TT1 Datasheet - Page 6

• Manufacturer Part Number: TFDU4301-TT1
• Manufacturer: Vishay

Specifications of TFDU4301-TT1

• Lead Free Status / RoHS Status: Supplier Unconfirmed

TFDU4301
Vishay Semiconductors
threshold levels of the inputs and equivalent levels at the
outputs no interferences are expected.
One should keep in mind that basic RF - design rules for
circuits design should be taken into account. Especially
Figure 2 shows an example of a typical application for to
work with a separate supply voltage V
transceiver with the IRED Anode connected to the
unregulated battery V
of the regulated power supply and saves therefore costs.
Alternatively all supplies can also be tied to only one voltage
source. R1 and C1 are not used in this case and are
depending on the circuit design in most cases not necessary.
I/O AND SOFTWARE
In the description, already different I/Os are mentioned.
Different combinations are tested and the function verified
with the special drivers available from the I/O suppliers. In
special cases refer to the I/O manual, the Vishay application
notes, or contact directly Vishay Sales, Marketing or
Application.
For operating at RS232 ports the ENDECS TOIM4232 or
TOIM5232 is recommended.
Note
TFDU4301 echoes the TXD signal at the RXD output during
transmission. For communication this signal is to be correctly
ignored by the controller or the software. The echo signal is
implemented for test purposes in mass production.
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6
High > 1 ms
TABLE 2. TRUTH TABLE
Low
Low
Low
Low
Low
SD
High > 100 µs
TXD
High
Low
Low
Low
V
x
batt
batt
3 V to 3.6 V
V
. This method reduces the peak load
S
[e-mail], [e-mail],
= 3.3 V
19296-1
For technical questions within your region, please contact one of the following:
OPTICAL INPUT IRRADIANCE mW/m
INPUTS
< max. detection threshold irradiance
> min. detection threshold irradiance
> min. detection threshold irradiance
IR MODE
V
Infrared Transceiver Module (SIR, 115.2 kbit/s)
dd
IRTX
IRRX
S
and using the
< 4
x
x
x
Fig. 2 - Typical Application Circuit
for IrDA
R2
C2
2
®
longer signal lines should not be used without termination.
See e.g. “The Art of Electronics” Paul Horowitz, Winfield Hill,
1989, Cambridge University Press, ISBN: 0521370957.
CURRENT DERATING DIAGRAM
Figure 3 shows the maximum operating temperature when
the device is operated without external current limiting
resisor.
(500 kΩ) to V
Applications
Weakly pulled
High inactive
High inactive
Low (active)
Low (active)
Undefined
IRED Anode (1)
IRED Cathode (2)
TXD (3)
RXD (4)
SD (5)
V
NC (7)
GND (8)
RXD
CC1
18097
(6)
90
85
80
75
70
65
60
55
50
[e-mail]
2
OUTPUTS
CC1
Fig. 3 - Current Derating Diagram
2.5
TRANSMITTER
Operating Voltage (V) at Duty Cycle 20 %
3
I
0
0
0
0
0
e
3.5
4
compliant optical input signal
Ignoring low signals below
the IrDA defined threshold
cause unexpected outputs
Overload conditions can
Document Number: 81965
Response to an IrDA
4.5
Protection is active
for noise immunity
OPERATION
Transmitting
REMARK
Shutdown
Rev. 1.0, 22-Apr-10
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5.5
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