Document Number: 81780
www.vishay.com
Rev. 1.5, 09-Jul-10
5
TSOP351.., TSOP353.., TSOP355..
IR Receiver Modules for Remote
Control Systems
Vishay Semiconductors
SUITABLE DATA FORMAT
The TSOP351.., TSOP353.. and TSOP355.. 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 TSOP351.., TSOP353..
and TSOP355.. 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
• Strongly or noise from fluorescent lamps with electronic
ballasts
Fig. 14 - IR Signal from Fluorescent Lamp
with Low Modulation
Fig. 15 - IR Signal from Fluorescent Lamp
with High Modulation
Note
• For data formats with long bursts (more than 10 carrier cycles) please see the datasheet for TSOP352.., TSOP354..
0
10
15
20
Time (ms)
16920
IR Signal
IR Signal from Fluorescent
Lamp with Low Modulation
5
0
10
15
20
Time (ms)
16921
IR Signal
IR Signal from Fluorescent
Lamp with High Modulation
5
TSOP351..
TSOP353..
TSOP355..
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 Sony code
yes
no
no
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 signals are
suppressed (example: signal
pattern of fig. 14)
Even critical disturbance signals
are suppressed (example: signal
pattern of fig. 14 an fig. 15)
Even critical disturbance signals
are suppressed (example: signal
pattern of fig. 14 an fig. 15)
