TSOP31238 Vishay, TSOP31238 Datasheet - Page 5

• Manufacturer Part Number: TSOP31238
• Description: Infrared Receivers 2.7-5.5V 38KHZ
• Manufacturer: Vishay

Specifications of TSOP31238

• Carrier Frequency: 38 KHz
• Supply Current: 0.35 mA
• Transmission Distance: 45 m
• Viewing Angle: 45 deg
• Output Current: 5 mA
• Operating Voltage: 2.5 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 25 C
• Transmission Range: 45m
• Directivity: 45°
• Supply Voltage Range: 2.5V To 5.5V
• Opto Case Style: Through Hole
• Operating Temperature Range: -25°C To +85°C
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (min): 2.5V
• Operating Supply Voltage (max): 5.5V
• Mounting: Through Hole
• Pin Count: 3
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

TSOP312.., TSOP314..
Vishay Semiconductors
SUITABLE DATA FORMAT
The TSOP312.., TSOP314.. 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 TSOP312.., TSOP314..
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 38 kHz or at any frequency
• Strongly or weakly modulated noise from fluorescent
Note
For data formats with short bursts please see the datasheet for TSOP311.., TSOP313..
www.vishay.com
5
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
lamps with electronic ballasts (see figure 15 or figure 16)
IR Receiver Modules for Remote
Control Systems
Most common disturbance
signals are suppressed
> 4 x burst length
10 cycles/burst
10 to 70 cycles
 10 cycles
TSOP312..
70 cycles
16921
16920
1800
Fig. 15 - IR Signal from Fluorescent Lamp
Fig. 16 - IR Signal from Fluorescent Lamp
yes
yes
yes
yes
yes
yes
0
0
with High Modulation
with Low Modulation
5
5
Time (ms)
Time (ms)
10
10
Even extreme disturbance
signals are suppressed
> 10 x burst length
Document Number: 81745
10 cycles/burst
10 to 35 cycles
 10 cycles
TSOP314..
35 cycles
15
15
Rev. 1.4, 04-Feb-11
1500
yes
yes
yes
yes
no
no
20
20