RPM7137-H9R Rohm Semiconductor, RPM7137-H9R Datasheet - Page 16

• Manufacturer Part Number: RPM7137-H9R
• Description: Infrared Receivers REMOTE CTRL 36.7KHZ
• Manufacturer: Rohm Semiconductor

Specifications of RPM7137-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: 4.5 V
• Output Current: 2 mA
• Operating Voltage: 4.5 V to 5.5 V
• Supply Current: 0.95 mA
• 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: 4.5 V ~ 5.5 V
• Current - Supply: 1.5mA
• 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

«Overview of AEHA's (Association for Electric Home Appliances) Format»
In this format, the leader is used for the discrimination of the start of transmission, the custom
code is registered and used to prevent the remote control and controlled equipment from
malfunctioning, and the parity bit along with the custom code is used to confirm that the signal is
addressed to the equipment in use. The trailer is used to discriminate the completion of
transmission.
With the diffusion of infrared remote control systems for home appliances, certain standards
apply to each manufacturer's signal transmission method in the AEHA's format with the method
officially registered, thus preventing the remote control and controlled equipment from
malfunctioning.
The transmission format presently in use takes individual measures for the prevention of
malfunctions. For example, a method is used to transmit the data code three times and read the
data code only when the leader code is received correctly at least twice in the three
transmissions. Another method is also used to transmit front and back signals and judge the
data only after the front and back signals coincide.
Application:
Subcarrier:
Signal format: A frame includes a leader, custom code, parity, data code, and trailer, the outline
(a) Signal
(b) Pulse shape
configuration
Block Diagram and Work of Remote Control Receiver Module/Remote Control Transmission Signal
subcarrier range up to 40kHz employed to transmit data.
of which is shown below.
Applicable to infrared remote control systems for home appliances with a
33kHz and 40kHz max.
Leader
T
Leader
8T
“0”
1 byte
0.35ms<T<0.5ms
• • •
Custom
code
T
Parity
Fig. 10
14
4T
T
Fig. 9
Data code
Subcarrier
33~57kHz
“1”
T
“0”
T
T
3T
“1”
3T
Trailer
T
8ms min.
Trailer