TSOP34340(2008) View Datasheet(PDF) - Vishay Semiconductors
Part Name
Description
Manufacturer
TSOP34340 Datasheet PDF : 8 Pages
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IR Receiver Modules for
Remote Control Systems
TSOP341.., TSOP343..
Vishay Semiconductors
SUITABLE DATA FORMAT
The TSOP341.., TSOP343.. series are designed to suppress
spurious output pulses due to noise or disturbance signals.
Data and disturbance signals can be distinguished by the
devices according to carrier frequency, burst length and
envelope duty cycle. The data signal should be close to the
band-pass center frequency (e.g. 38 kHz) and fulfill the
conditions in the table below.
When a data signal is applied to the TSOP341.., TSOP343..
in the presence of a disturbance signal, the sensitivity of the
receiver is reduced to insure that no spurious pulses are
present at the output. Some examples of disturbance signals
which are suppressed are:
• DC light (e.g. from tungsten bulb or sunlight)
• Continuous signals at any frequency
• Modulated noise from fluorescent lamps with electronic
ballasts (see figure 14 or figure 15)
IR Signal from Fluorescent
Lamp with Low Modulation
0
5
10
15
20
16920
Time (ms)
Fig. 14 - IR Signal from Fluorescent Lamp
with Low Modulation
IR Signal from Fluorescent
Lamp with High Modulation
0
16921
10
10
15
20
Time (ms)
Fig. 15 - IR Signal from Fluorescent Lamp
with High Modulation
Minimum burst length
After each burst of length
a minimum gap time is required of
For bursts greater than
a minimum gap time in the data stream is needed of
Maximum number of continuous short bursts/second
Compatible to NEC code
Compatible to RC5/RC6 code
Compatible to Sony code
Compatible to RCMM code
Compatible to r-step code
Compatible to XMP code
Suppression of interference from fluorescent lamps
TSOP341..
6 cycles/burst
6 to 70 cycles
≥ 10 cycles
70 cycles
> 1.2 x burst length
2000
yes
yes
yes
yes
yes
yes
Common disturbance signals are
supressed (example: signal pattern
of fig. 14)
TSOP343..
6 cycles/burst
6 to 35 cycles
≥ 10 cycles
35 cycles
> 6 x burst length
2000
yes
yes
no
yes
yes
yes
Even critical disturbance signals are
suppressed (examples: signal pattern of
fig. 14 and fig. 15)
Note
For data formats with long bursts (more than 10 carrier cycles) please see the data sheet for TSOP348.., TSOP344.
Document Number: 81737
Rev. 1.2, 19-Aug-08
www.vishay.com
119
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