www.vishay.com

Document Number: 81860

226

Rev. 1.1, 10-Sep-08

TSOP853..

Vishay Semiconductors

IR Receiver Modules for

Remote Control Systems

SUITABLE DATA FORMAT

The TSOP853.. series is 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 TSOP853.. 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 noise from fluorescent lamps with electronic

ballasts

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 data sheet for TSOP852.., TSOP854..

010

15

20

Time (ms)

16920

IR Signal from Fluorescent

Lamp with Low Modulation

5

010

15

20

Time (ms)

16921

IR Signal from Fluorescent

Lamp with High Modulation

10

TSOP853..

Minimum burst length

6 cycles/burst

After each burst of length

a minimum gap time is required of

6 to 35 cycles

≥ 10 cycles

For bursts greater than

a minimum gap time in the data stream is needed of

35 cycles

> 6 x burst length

Maximum number of continuous short bursts/second

2000

Compatible to NEC code

yes

Compatible to RC5/RC6 code

yes

Compatible to Sony code

no

Compatible to RCMM code

yes

Compatible to r-step code)

yes

Compatible to XMP code

yes

Suppression of interference from fluorescent lamps

Even critical disturbance signals are suppressed

(examples: signal pattern of fig. 13 and fig. 14)