TSOP321.., TSOP323.., TSOP325.., TSOP341.., TSOP343.., TSOP345..

www.vishay.com

Vishay Semiconductors

Rev. 1.2, 18-Sep-13

5

Document Number: 82490

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

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 figure 13 or figure 14).

Fig. 13 - IR Disturbance from Fluorescent Lamp

with Low Modulation

Fig. 14 - IR Disturbance from Fluorescent Lamp

with High Modulation

Notes

• For data formats with long bursts (more than 10 carrier cycles) please see the datasheet for TSOP348.., TSOP344.., TSOP322.., TSOP324..

• Example of compatible products for IR-codes:

• For SIRCS 15 and 20 bit, Sony 12 bit IR-codes, please see the datasheet for TSOP4S40, TSOP2S40

010

15

20

Time (ms)

16920

5

010

15

20

Time (ms)

16921

5

TSOP341.., TSOP321..

TSOP343.., TSOP323..

TSOP345.., TSOP325..

Minimum burst length

6 cycles/burst

6 cycles/burst

6 cycles/burst

After each burst of length

a minimum gap time is required of

6 to 70 cycles

≥ 10 cycles

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

70 cycles

> 1.2 x burst length

35 cycles

> 6 x burst length

24 cycles

> 25 ms

Maximum number of continuous

short bursts/second

2000

2000

2000

Recommended for NEC code

yes

yes

yes

Recommended for RC5/RC6 code

yes

yes

yes

Recommended for RCMM code

yes

yes

yes

Recommended for r-step code

yes

yes

yes

Recommended for XMP code

yes

yes

yes

Suppression of interference from

fluorescent lamps

Common disturbance patterns

are supressed (example:

signal pattern of fig. 14)

Even critical disturbance patterns

are suppressed (examples: signal

pattern of fig. 14 and fig. 15)

Even critical disturbance patterns

are suppressed (examples: signal

pattern of fig. 14 and fig. 15)