RPM7237-R Rohm Semiconductor, RPM7237-R Datasheet - Page 21

• Manufacturer Part Number: RPM7237-R
• Description: RECEIVER REMOTE CTRL 36.7KHZ STR
• Manufacturer: Rohm Semiconductor

Specifications of RPM7237-R

• Sensing Distance: 15m
• B.p.f. Center Frequency: 36.7kHz
• Voltage - Supply: 2.7 V ~ 3.6 V
• Current - Supply: 500µA
• Orientation: Side View
• Mounting Type: Through Hole
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

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