TSOP581.., TSOP583.., TSOP585..
www.vishay.com
Vishay Semiconductors
Rev. 1.4, 22-Jul-16
5
Document Number: 82462
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SUITABLE DATA FORMAT
These products 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 IR receiver 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 Fig. 15 or Fig. 16)
•2.4 GHz and 5 GHz Wi-Fi
Fig. 15 - IR Disturbance from Fluorescent Lamp
with Low Modulation
Fig. 16 - IR Disturbance from Fluorescent Lamp
with High Modulation
Note
• For data formats with long bursts (more than 10 carrier cycles) please see the datasheet for TSOP582.., TSOP584..
0101520
Time (ms)
16920
IR Signal
5
0101520
Time (ms)
16921
IR Signal
5
TSOP581.. TSOP583.. TSOP585..
Minimum burst length 6 cycles/burst 6 cycles/burst 6 cycles/burst
After each burst of length
A gap time is required of
6 to 70 cycles
≥ 10 cycles
6 to 35 cycles
≥ 10 cycles
6 to 24 cycles
≥ 10 cycles
For bursts greater than
a minimum gap time in the data
stream is needed of
70 cycles
> 1.2 x burst length
35 cycles
> 6 x burst length
24 cycles
> 25 ms
Maximum number of continuous
short bursts/second
2000 2000 2000
MCIR code Yes Preferred Yes
XMP-1, XMP-2 code Yes Preferred Yes
Suppression of interference from
fluorescent lamps
Mild disturbance patterns
are suppressed (example:
signal pattern of Fig. 15)
Complex disturbance patterns
are suppressed (example:
signal pattern of Fig. 16)
Critical disturbance
patterns are suppressed,
e.g. highly dimmed LCDs
