TSOP31538 Vishay, TSOP31538 Datasheet - Page 5

• Manufacturer Part Number: TSOP31538
• Manufacturer: Vishay

Specifications of TSOP31538

• Lead Free Status / RoHS Status: Compliant

SUITABLE DATA FORMAT
The TSOP311.., TSOP313.. and TSOP315.. series 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 TSOP311.., TSOP313..
and TSOP315.. 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
Note
• For data formats with short bursts please see the datasheet for TSOP312.., TSOP314..
Document Number: 81763
Rev. 1.5, 09-Jul-10
Minimum burst length
After each burst of length
A gap time is required of
For bursts greater than
a minimum gap time in the data
stream is needed of
Maximum number of continuous
short bursts/second
Recommended for NEC code
Recommended for RC5/RC6 code
Recommended for Sony code
Recommended for RCMM code
Recommended for r-step code
Recommended for XMP code
Suppression of interference from
fluorescent lamps
ballasts
Common disturbance signals are
signal pattern of fig. 15)
supressed (example:
> 1.2 x burst length
IR Receiver Modules for Remote
6 cycles/burst
6 to 70 cycles
≥ 10 cycles
TSOP311..
70 cycles
2000
yes
yes
yes
yes
yes
yes
Control Systems
TSOP311.., TSOP313.., TSOP315..
are suppressed (examples: signal
Even critical disturbance signals
pattern of fig. 15 and fig. 16)
> 6 x burst length
16921
16920
6 cycles/burst
6 to 35 cycles
≥ 10 cycles
TSOP313..
35 cycles
2000
Fig. 15 - IR Signal from Fluorescent Lamp
Fig. 16 - IR Signal from Fluorescent Lamp
yes
yes
yes
yes
yes
0
0
no
Lamp with High Modulation
IR Signal from Fluorescent
IR Signal from Fluorescent
Lamp with Low Modulation
with High Modulation
5
with Low Modulation
5
Vishay Semiconductors
Time (ms)
Time (ms)
10
10
are suppressed (examples: signal
Even critical disturbance signals
pattern of fig. 15 and fig. 16)
15
15
6 cycles/burst
6 to 24 cycles
≥ 10 cycles
TSOP315..
24 cycles
> 25 ms
2000
yes
yes
yes
yes
yes
no
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20
20
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