TSOP1156UU1. Vishay, TSOP1156UU1. Datasheet - Page 5

• Manufacturer Part Number: TSOP1156UU1.
• Manufacturer: Vishay

Specifications of TSOP1156UU1.

• Lead Free Status / RoHS Status: Compliant

Suitable Data Format
The circuit of the TSOP11..UU1 is designed in that
way that unexpected output pulses due to noise or
disturbance signals are avoided. A bandpass filter, an
integrator stage and an automatic gain control are
used to suppress such disturbances.
The distinguishing mark between data signal and dis-
turbance signal are carrier frequency, burst length
and duty cycle.
The data signal should fulfill the following conditions:
• Carrier frequency should be close to center fre-
quency of the bandpass (e.g. 38 kHz).
• Burst length should be 6 cycles/burst or longer.
• After each burst which is between 6 cycles and 70
cycles a gap time of at least 10 cycles is necessary.
• For each burst which is longer than 1.8 ms a corre-
sponding gap time is necessary at some time in the
data stream. This gap time should have at least same
length as the burst.
• Up to 2200 short bursts per second can be received
continuously.
Some examples for suitable data format are: NEC
Code, Toshiba Micom Format, Sharp Code, RC5
Code, RC6 Code, RCMM Code, R-2000 Code,
RECS-80 Code.
When a disturbance signal is applied to the
TSOP11..UU1 it can still receive the data signal. How-
ever the sensitivity is reduced to that level that no
unexpected pulses will occur.
Some examples for such disturbance signals which
are suppressed by the TSOP11..UU1 are:
• DC light (e.g. from tungsten bulb or sunlight)
Document Number 82012
Rev. 1.11, 27-Jan-05
VISHAY
95 11339p2
1.0
0.9
0.8
0.7
0.6
d
rel
0.4
Figure 13. Vertical Directivity ϕ
- Relative Transmission Distance
0.2
0
0°
0.2
10°
0.4
20°
0.6
y
30°
40°
50°
60°
70°
80°
• Continuous signal at 38 kHz or at any other fre-
quency
• Signals from fluorescent lamps with electronic bal-
last (an example of the signal modulation is in the fig-
ure below).
Figure 14. IR Signal from Fluorescent Lamp with low Modulation
16920
0
IR Signal from fluorescent
lamp with low modulation
5
Time ( ms )
10
Vishay Semiconductors
TSOP11..UU1
15
20
www.vishay.com
5