TSOP573.., TSOP575..

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Vishay Semiconductors

Datasheet Values Refer to PCN-OPT-1224-2022

Rev. 2.4, 22-Nov-2022

6

Document Number: 82450

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SUITABLE DATA FORMAT

The TSOP573.., TSOP575.. series is designed to suppress

spurious output pulses due to noise or disturbance signals.

The devices can distinguish data signals from noise due to

differences in frequency, burst length, and envelope duty

cycle. The data signal should be close to the device’s

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, the sensitivity of the

receiver is automatically reduced by the AGC to insure that

no spurious pulses are present at the receiver’s output.

Some examples which are suppressed are:

• DC light (e.g. from tungsten bulbs sunlight)

• Continuous signals at any frequency

• Strongly or weakly modulated patterns from fluorescent

lamps with electronic ballasts (see Fig. 13 or Fig. 14)

•2.4 GHz and 5 GHz Wi-Fi

Fig. 13 - IR Signal from Fluorescent Lamp

With Low Modulation

Fig. 14 - 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 TSOP572.., TSOP574..

16920

10

100

1000

10000

0

1

2

3

4

5

6

7

0

5

10

15

20

Axis Title

Time (ms)

16921

10

100

1000

10000

-60

-40

-20

0

20

40

0

5

10

15

20

Axis Title

Time (ms)

TSOP573..

TSOP575..

Minimum burst length

6 cycles/burst

6 cycles/burst

After each burst of length

a minimum gap time is required of

6 to 40 cycles

≥ 7 cycles

6 to 20 cycles

≥ 7 cycles

For bursts greater than

a minimum gap time in the data

stream is needed of

40 cycles

> 6 x burst length

20 cycles

> 10 x burst length

Maximum number of continuous

short bursts/second

2500

2500

RCMM code

Preferred

Yes

r-map code

Preferred

Yes

XMP code

Preferred

Yes

Suppression of interference from

fluorescent lamps

Mild and complex disturbance patterns

are suppressed (example: signal

pattern of Fig. 13 and Fig. 14)

Critical disturbance

patterns are suppressed,

e.g. highly dimmed LCDs