TSOP4838SS1BS12 Vishay, TSOP4838SS1BS12 Datasheet - Page 3

• Manufacturer Part Number: TSOP4838SS1BS12
• Description: IR RECEIVER, 35M, 950NM, SIP
• Manufacturer: Vishay

Specifications of TSOP4838SS1BS12

• Transmission Range: 35m
• Directivity: 45°
• Supply Voltage Range: 4.5V To 5.5V
• Opto Case Style: Through Hole
• Operating Temperature Range: -25°C To +85°C
• Carrier Frequency: 38kHz
• Supply Current: 1.4mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Suitable Data Format
The circuit of the TSOP48..SS1BS12 is designed in
that way that unexpected output pulses due to noise
or disturbance signals are avoided. A bandpassfilter,
an integrator stage and an automatic gain control are
used to suppress such disturbances.
The distinguishing mark between data signal and
disturbance signal are carrier frequency, burst length
and duty cycle.
The data signal should fullfill the following condition:
frequency of the bandpass (e.g. 38kHz).
cycles a gap time of at least 14 cycles is necessary.
corresponding gap time is necessary at some time in
the data stream. This gap time should be at least 4
times longer than the burst.
continuously.
Document Number 82122
Rev. 3, 29-Mar-01
Carrier frequency should be close to center
Burst length should be 10 cycles/burst or longer.
After each burst which is between 10 cycles and 70
For each burst which is longer than 1.8ms a
Up to 800 short bursts per second can be received
0
0
Figure B: IR Signal from Fluorescent Lamp with high Modulation
Figure A: IR Signal from Fluorescent Lamp with low Modulation
5
5
time [ms]
time [s]
10
10
Some examples for suitable data format are:
NEC Code, Toshiba Micom Format, Sharp Code, RC5
Code, RC6 Code, R–2000 Code.
When a disturbance signal is applied to the
TSOP48..SS1BS12 it can still receive the data signal.
However the sensitivity is reduced to that level that no
unexpected pulses will occure.
Some examples for such disturbance signals which
are suppressed by the TSOP48..SS1BS12 are:
frequency
ballast with high or low modulation (see Figure A or
Figure B).
DC light (e.g. from tungsten bulb or sunlight)
Continuous signal at 38kHz or at any other
Signals from fluorescent lamps with electronic
TSOP48..SS1BS12
15
15
Vishay Telefunken
www.vishay.com
20
20
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