RPM871-E4A Rohm Semiconductor, RPM871-E4A Datasheet - Page 6

• Manufacturer Part Number: RPM871-E4A
• Description: Fiber Optic Transmitters, Receivers, Transceivers IRDA INFRARED COMMUNICATIONS
• Manufacturer: Rohm Semiconductor

Specifications of RPM871-E4A

• Product: Transceiver
• Data Rate: 115.2 Kbps
• Wavelength: 870 nm
• Maximum Rise Time: 70 ns
• Maximum Fall Time: 30 ns
• Pulse Width Distortion: 2.3 us
• Operating Supply Voltage: 2.6 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 20 C
• Package / Case: RSLP-8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Photo Link Module
1) LEDV
2) Caution in designing board lay-out
3) Others
4) LED current derating and ambient temperature
Notes
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To get maximum potential from RPM871, please keep in mind following instruction.
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⇒This is to minimize feedback supplied to photo diode from RXD.
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The relation between LED peak current and maximum ambient temperature is shown below.
We recommend you to use within the range as indicated in below.
a) When glass-epoxy board (70×70×1.6mm) mounted.
b) RPM871
be close to photo diode side (1pin).
generates noise, such as DC / DC converter.
(for < 90µsec. on duty < 20%).
by different signal format.
Other power source can be used difference between LEDV
The line of RXD (6pin) should be connected at backside via through hole close to RPM871 pin lead. Better not to
As for C1 between 3-4 pin should be placed close to RPM871.
Better to be placed more than 1.0cm in radius from photo diode (pin1 side) and also away from the parts which
Please be sure to set up the TXD (7pin) input to be “L” (under 0.55V) except transmitting data
Power down current might increase if exposed by strong light (ex. direct sunlight) at power down mode.
Please use by the signal format which is specified by IrDA Ver1.2 (2.4k to 115.2kbps). There might be on error if used
Dust or dirt on lens portion may affect the characteristics, so pay sufficient attention.
250
200
150
100
250
200
150
100
50
50
CC
0
0
−20
−20
(8pin) and V
AMBIENT TEMPERATURE : Ta (°C)
AMBIENT TEMPERATURE : Ta (°C)
0
0
20
20
CC
Duty=20%
40
40
(3pin)
Duty=20%
Duty=10%
60
60
Duty=10%
80
80
10
10
0
0
CC
and V
CC
.
Rev.B
RPM871
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