TSOP34438SS1F Просмотр технического описания (PDF) - Vishay Semiconductors
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TSOP34438SS1F Datasheet PDF : 7 Pages
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TSOP322.., TSOP324.., TSOP344.., TSOP348..
www.vishay.com
Vishay Semiconductors
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 Fig. 13 or Fig. 14).
Axis Title
7
10000
6
5
1000
4
3
100
2
1
0
0
16920
5
10
15
Time (ms)
10
20
Fig. 13 - IR Disturbance from Fluorescent Lamp
With Low Modulation
Axis Title
40
10000
20
1000
0
-20
100
-40
-60
0
16921
5
10
15
Time (ms)
10
20
Fig. 14 - IR Disturbance from Fluorescent Lamp
With High Modulation
Minimum burst length
After each burst of length
a minimum 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
NEC code
RC5/RC6 code
Thomson 56 kHz code
Sharp code
Suppression of interference from fluorescent lamps
TSOP322.., TSOP348..
10 cycles/burst
10 to 70 cycles
≥ 10 cycles
70 cycles
> 4 x burst length
1800
Yes
Yes
Yes
Yes
Mild disturbance patterns
are suppressed (example:
signal pattern of Fig. 13)
TSOP324.., TSOP344..
10 cycles/burst
10 to 35 cycles
≥ 10 cycles
35 cycles
> 10 x burst length
1500
Preferred
Preferred
Preferred
Preferred
Complex and critical disturbance patterns
are suppressed (example: signal pattern
of Fig. 14 or highly dimmed LCDs)
Notes
• For data formats with short bursts please see the datasheet for TSOP323.., TSOP325.., TSOP343.., TSOP345..
• For Sony 12, 15, and 20 bit IR codes please see the datasheet of TSOP34S40F, TSOP32S40F
Rev. 1.5, 10-Aug-18
5
Document Number: 82489
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
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