TSOP773.., TSOP775..

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Vishay Semiconductors

Datasheet Values Refer to PCN-OPT-1224-2022

Rev. 2.2, 16-Aug-2022

6

Document Number: 82465

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

These products 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 IR receiver 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

• Modulated IR pattern from common fluorescent lamps

(example of noise pattern is shown in Fig. 14 or Fig. 15)

• 2.4 GHz and 5 GHz Wi-Fi

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 TSOP772.., TSOP774..

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)

TSOP773..

TSOP775..

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

XMP code

Preferred

Yes

r-map 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