TSOP931..DF1P, TSOP933..DF1P, TSOP935..DF1P

www.vishay.com

Vishay Semiconductors

Rev. 1.1, 05-Aug-2021

5

Document Number: 82883

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000

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 long bursts (more than 10 carrier cycles) please see the datasheet for TSOP932..DF1P, TSOP934..DF1P, or

TSOP936..DF1P

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)

TSOP931..DF1P

TSOP933..DF1P

TSOP935..DF1P

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

≥ 6 cycles

6 to 20 cycles

≥ 8 cycles

6 to 38 cycles

≥ 8 cycles

For bursts greater than

a minimum gap time in the data stream is needed of

70 cycles

> 1 x burst length

20 cycles

> 6 x burst length

38 cycles

> 20 ms

Maximum number of continuous short bursts/second

3000

2500

2500

RCMM code

Yes

Preferred

Yes

XMP-1 code

Yes

Preferred

Yes

r-map code

Yes

Yes

Preferred

RECS-80 code

Yes

Preferred

Yes

MCIR

Yes

Preferred

Yes

Suppression of interference from fluorescent lamps

Fig. 13

Fig. 13 and Fig. 14

Fig. 13 and Fig. 14