RPM7237-H9R Rohm Semiconductor, RPM7237-H9R Datasheet - Page 17
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RPM7237-H9R
Manufacturer Part Number
RPM7237-H9R
Description
Infrared Receivers REMOTE CTRL 36.7KHZ
Manufacturer
Rohm Semiconductor
Specifications of RPM7237-H9R
Carrier Frequency
36.7 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
36.7kHz
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
5. Precautions for Designing Transmitter Side
1) Transmitter
Remote Control Receiver Module
2) Transmission Format
«Transmitter circuit example»
• Leader Pulse
Precautions for Transmission Frequency
Battery
The Remote Control Receiver Module covers a wide input range, and automatically makes
receiving sensitivity by using leader pulses. The pulse immediately after the start of input
may fluctuate (i.e., the receiving pulse width of output may be wider than the transmission
pulse width) if there is no leader pulse.
Check that the subcarrier frequency of the transmitter coincides with the center frequency
of the Remote Control Receiver Module, or otherwise the effective distance may be
reduced or no receiving may be possible.
Sig
100µ
Fig. 13
Necessary time for
sensitivity stabilization
LED current
LED
R
Fig. 14 Automatic Sensitivity Adjustment
15
The electrolytic capacitor C provides the LED
current.
The resister R is used to set the forward current
of the LED and adjusts the optical output power
of the transmitter.
The LED is used usually 5mm in diameter and of
high-intensity type.
(Optical wavelength (λ)=940 or 950nm)
Signal
Binary slice level