TSOP57556 Vishay, TSOP57556 Datasheet - Page 5

• Manufacturer Part Number: TSOP57556
• Description: (TSOP573xx / TSOP575xx) IR Receiver Modules
• Manufacturer: Vishay

SUITABLE DATA FORMAT
The TSOP573.., TSOP575.. 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 TSOP573.., TSOP575..
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
• Strongly or weakly modulated noise from fluorescent
Note
• For data formats with bursts longer than 12 cycles/burst please see the datasheet for TSOP574..
Revision: 1.1, 09-Mar-12
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
Recommended for NEC code
Recommended for RC5/RC6 code
Recommended for r-step code
Recommended for Thomson 56 kHz code
Recommended for XMP code
Recommended for RCMM code
Suppression of interference from fluorescent lamps
lamps with electronic ballasts (see figure 12 or figure 13)
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Most common disturbance
signals are suppressed
> 7 x burst length
16920
16921
10 to 42 cycles
6 cycles/burst
≥ 10 cycles
TSOP573..
42 cycles
www.vishay.com/doc?91000
Fig. 13 - IR Signal from Fluorescent Lamp
Fig. 14 - IR Signal from Fluorescent Lamp
2000
Yes
Yes
Yes
Yes
Yes
Yes
0
0
TSOP573.., TSOP575..
with High Modulation
with Low Modulation
5
5
Vishay Semiconductors
Time (ms)
Time (ms)
10
10
Even extreme disturbance
signals are suppressed
Document Number: 82450
> 12 x burst length
15
15
10 to 28 cycles
6 cycles/burst
≥ 10 cycles
TSOP575..
28 cycles
2000
Yes
Yes
Yes
Yes
Yes
No
20
20
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