Document Number: 82135 www.vishay.com
Rev. 2.6, 04-Nov-09 5
New TSOP41.., TSOP43..
IR Receiver Modules for Remote
Control Systems Vishay Semiconductors
SUITABLE DATA FORMAT
The TSOP41.., TSOP43.. 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 TSOP41.., TSOP43.. 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)
Fig. 14 - IR Signal from Fluorescent Lamp
with Low Modulation
Fig. 15 - IR Signal from Fluorescent Lamp
with High Modulation
Note
For data formats with long bursts (more than 10 carrier cycles) please see the datasheet for TSOP48.., TSOP44.. .
0101520
Time (ms)
16920
IR Signal
IR Signal from Fluorescent
Lamp with Low Modulation
5
0101520
Time (ms)
16921
IR Signal
IR Signal from Fluorescent
Lamp with High Modulation
5
TSOP41.. TSOP43..
Minimum burst length 6 cycles/burst 6 cycles/burst
After each burst of length
a minimum gap time is required of
6 to 70 cycles
≥ 10 cycles
6 to 35 cycles
≥ 10 cycles
For bursts greater than
a minimum gap time in the data stream is needed of
70 cycles
> 1.1 x burst length
35 cycles
> 6 x burst length
Maximum number of continuous short bursts/second 2000 2000
Recommended for NEC code yes yes
Recommended for RC5/RC6 code yes yes
Recommended for Sony code yes no
Recommended for RECS-80 code yes yes
Recommended for RCMM code yes yes
Recommended for r-step code yes yes
Recommended for XMP code yes yes
Suppression of interference from fluorescent lamps
Common disturbance signals are
supressed (example: signal pattern
of fig. 14)
Even critical disturbance signals are
suppressed (examples: signal pattern of
fig. 14 and fig. 15)