TSOP932..P16TR, TSOP934..P16TR

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Vishay Semiconductors

Rev. 1.1, 05-Aug-2021

5

Document Number: 82879

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SUITABLE DATA FORMAT

This 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 product 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)

Fig. 13 - IR Emission from Fluorescent Lamp

With Low Modulation

Fig. 14 - IR Emission from Fluorescent Lamp

With High Modulation

Note

• For data formats with short bursts please see the datasheet for TSOP933..P16TR, TSOP935..P16TR

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)

TSOP932..P16TR

TSOP934..P16TR

Minimum burst length

16 cycles/burst

10 cycles/burst

After each burst of length

a minimum gap time is required of

16 to 70 cycles

≥ 16 cycles

10 to 40 cycles

≥ 12 cycles

For bursts greater than

a minimum gap time in the data stream is needed of

70 cycles

> 6 x burst length

40 cycles

> 10 x burst length

Maximum number of continuous short bursts/second

1000

1800

RC-5 code

Yes

Yes

RC-6 code

Yes

Preferred

NEC code

Yes

Yes

r-step code 56 kHz

No

Preferred

Sony code

Preferred

No

RCA 56 kHz code

Yes

Preferred

Mitsubishi code 38 kHz

Yes

Yes

Suppression of interference from fluorescent lamps

Fig. 13

Fig. 13 and Fig. 14