TSOP4838 Vishay, TSOP4838 Datasheet - Page 5

• Manufacturer Part Number: TSOP4838
• Description: Infrared Receivers 4.5-5.5V 38kHz
• Manufacturer: Vishay

Specifications of TSOP4838

• Carrier Frequency: 38 KHz
• Supply Current: 0.85 mA
• Beam Angle: 45 deg
• Data Transmission Rate: 800 bits/s
• Mounting Style: Through Hole
• Transmission Distance: 45 m
• Viewing Angle: 45 deg
• Output Current: 5 mA
• Operating Voltage: 2.7 V to 5.5 V
• Power Dissipation: 10 mW
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 25 C
• Transmission Range: 45m
• Directivity: 45°
• Supply Voltage Range: 2.7V To 5.5V
• Opto Case Style: Through Hole
• Operating Temperature Range: -25°C To +85°C
• Svhc: No SVHC
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

SUITABLE DATA FORMAT
These products 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 IR receiver 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 IR signals from common fluorescent lamps
Note
• For data formats with short bursts please see the datasheet of TSOP23.., TSOP43..
Document Number: 82090
Rev. 2.8, 04-Feb-11
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
Recommended for NEC code
Recommended for RC5/RC6 code
Recommended for Sony code
Recommended for Thomson 56 kHz code
Recommended for Mitsubishi code
(38 kHz, preburst 8 ms, 16 bit)
Recommended for Sharp code
Suppression of interference from fluorescent lamps
(example of noise pattern is shown in fig. 14 or fig. 15)
IR Receiver Modules for Remote
TSOP22.., TSOP24.., TSOP48.., TSOP44..
Control Systems
Most common disturbance signals are
TSOP22.., TSOP48..
> 4 x burst length
10 cycles/burst
10 to 70 cycles
suppressed
 12 cycles
70 cycles
800
yes
yes
yes
yes
yes
yes
16921
16920
Fig. 14 - IR Signal from Fluorescent Lamp
Fig. 15 - IR Signal from Fluorescent Lamp
0
0
with High Modulation
with Low Modulation
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Vishay Semiconductors
Even extreme disturbance signals are
Time (ms)
Time (ms)
10
10
TSOP24.., TSOP44..
> 10 x burst length
10 cycles/burst
10 to 35 cycles
suppressed
 12 cycles
35 cycles
15
15
1300
yes
yes
yes
yes
yes
no
www.vishay.com
20
20
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