RPM7238-H4R Rohm Semiconductor, RPM7238-H4R Datasheet - Page 21
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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) Grounding and Pattern Designing
Remote Control Receiver Module
• Other Noise Sources
• Output pull-up resistance
«Circuit diagram»
Power supply noise may wrap around from the digital block of the set or may result due to
the insufficient smoothing of the power supply circuit. If there are power supply ripples, the
effective distance may be reduced. The RPM7100-Hx and RPM7200-Hx Series are
designed to reduce the droppage of effective distance to the minimum.
Power Supply Noise
The pull-up resistance connected to the output must limit the absorption current of Remote
Control Receiving Module to a range not exceeding a specified value, or otherwise the low-level
voltage will be in excess of the specified value.
Electromagnetic Noise
The following ones may be sources of electromagnetic noise.
• CRT noise
• LCD (driver) noise (i.e., horizontal synchronizing signal at 38kHz)
• Fluorescent lamp
• Noise radiated from power supply circuit
R>
Vcc-VOL
Isink
47µF
C
+
Fig. 21 Pull-up Circuit Diagram
19
Vcc
GND
Isink: Specified Absorption Current Max.
RPM7100-Hx Series
RPM7200-Hx Series
R
OUT
Model
R
Microcontroller
Isink (µA)
400
200