TSOP753.., TSOP755..

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Vishay Semiconductors

Rev. 2.2, 29-Jul-2021

6

Document Number: 82495

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SUITABLE DATA FORMAT

The TSOP753.., TSOP755.. 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 TSOP753.. and

TSOP755.. 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 pattern from fluorescent

lamps with electronic ballasts (see Fig. 14 or Fig. 15)

Fig. 14 - IR Disturbance from Fluorescent Lamp

With Low Modulation

Fig. 15 - IR Disturbance from Fluorescent Lamp

With High Modulation

Note

• For data formats with long bursts please see the datasheet for TSOP752.., TSOP754..

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)

TSOP753..

TSOP755..

Minimum burst length

6 cycles/burst

6 cycles/burst

After each burst of length

a minimum gap time is required of

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

35 cycles

> 4 x burst length

24 cycles

> 25 ms

Maximum number of continuous short

bursts/second

2000

2000

MCIR code

Preferred

Yes

XMP-1, XMP-2 code

Preferred

Yes

Suppression of interference from fluorescent

lamps

Mild and complex disturbance

patterns are suppressed (example:

signal pattern of Fig. 14 and Fig. 15)

Critical disturbance

patterns are suppressed,

e.g. highly dimmed LCDs