RPM7238-H4R Rohm Semiconductor, RPM7238-H4R Datasheet - Page 25
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RPM7238-H4R
Manufacturer Part Number
RPM7238-H4R
Description
Infrared Receivers REMOTE CTRL 37.9KHZ
Manufacturer
Rohm Semiconductor
Specifications of RPM7238-H4R
Carrier Frequency
37.9 KHz
Transmission Distance
15 m
Viewing Angle
45 deg, 35 deg
High Level Pulse Width
800 us
Low Level Pulse Width
800 us
Minimum High Level Output Voltage
2.5 V
Output Current
2 mA
Operating Voltage
2.7 V to 3.6 V
Supply Current
300 uA
Maximum Operating Temperature
+ 75 C
Minimum Operating Temperature
- 10 C
Package / Case
RSIP-A3
Sensing Distance
15m
B.p.f. Center Frequency
37.9kHz
Voltage - Supply
2.7 V ~ 3.6 V
Current - Supply
500µA
Orientation
Top View
Mounting Type
Through Hole
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
RPM7238-H4R
Manufacturer:
ROHM
Quantity:
12 000
Part Number:
RPM7238-H4R
Manufacturer:
ROHM/罗姆
Quantity:
20 000
3) Subcarrier
Remote Control Receiver Module
• Coincidence of Subcarrier
• Constant Duty of Subcarrier
Make sure that the duty of the subcarrier is constant. The discontinuance of the duty may cause
a receiving output pulse split and result in a receiving error.
Make sure that the subcarrier coincides with the center frequency of the Remote Control
Receiver Module, or otherwise the effective distance may be shorter or the Remote Control
Receiver Module may fail to receive the signal.
«Bad Example»
Transmission
waveform
(Good)
Transmission
waveform
(Bad)
Receiving
output
waveform
Transmission
Receiving
The noise cannot be discriminated from the signal.
Receiving is OK
Pulse split
Fig. 27 Single Transmission Pulse
Fig. 28 Duty Discontinuance Period
Noise pulse
23
Pulse split
Measures for Preventing Malfunction
The set will respond to a noise
pulse in the case of the edge
discrimination of a single pulse.