TSOP2137 View Datasheet(PDF) - Vishay Semiconductors
Part Name
Description
Manufacturer
TSOP2137 Datasheet PDF : 8 Pages
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IR Receiver Modules for
Remote Control Systems
New TSOP21..
Vishay Semiconductors
SUITABLE DATA FORMAT
The TSOP21.. series is 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 TSOP21.. 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 IR signals from common fluorescent lamps
(example of noise pattern is shown in figure 14)
IR Signal from Fluorescent
Lamp with Low Modulation
0
16920
5
10
15
20
Time (ms)
Fig. 14 - IR Signal from Fluorescent Lamp
with Low Modulation
TSOP21..
Minimum burst length
6 cycles/burst
After each burst of length
a minimum gap time is required of
6 to 70 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
Maximum number of continuous short bursts/second
2000
Compatible to NEC code
yes
Compatible to RC5/RC6 code
yes
Compatible to RCMM code
yes
Compatible to RECS-80 code
yes
Compatible to r-Step and r-Map data format
yes
Compatible to XMP data format
yes
Suppression of interference from fluorescent lamps
Most common disturbance signals are suppressed
Note
For data formats with long bursts (10 carrier cycles or longer) we recommend the TSOP22.. because of the better noise suppression.
Document Number: 82094
Rev. 2.1, 18-Jul-08
www.vishay.com
83
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