RPM882-H14E2 Rohm Semiconductor, RPM882-H14E2 Datasheet - Page 8

• Manufacturer Part Number: RPM882-H14E2
• Description: Fiber Optic Transmitters, Receivers, Transceivers IRDA INFRARED COMMUNICATIONS
• Manufacturer: Rohm Semiconductor

Specifications of RPM882-H14E2

• Product: Transceiver
• Data Rate: 115.2 Kbps
• Wavelength: 890 nm
• Maximum Rise Time: 35 ns
• Maximum Fall Time: 35 ns
• Pulse Width Distortion: 1.63 us, 2.3 us
• Operating Supply Voltage: 2.4 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Photo Link Module
Recommended values
[LED current set-up method for Remote control mode]
In case of using R1 with different condition from the above, formula is as follows :
LED resistance value : R1[Ω], LED average consumption current : ILED[mA], Supply voltage : VLEDV
minimum necessary of irradiant intensity le1 [mW / sr]
(Including LED’s distribution within ±15deg)
R1=166 × (VLEDV
ILED=Duty × (VLEDVCC−1.28) / (R1+3.5)
∗ Please set up to be ILED / Duty < 250[mA]
∗ At IrDA Mode, LED current is constantly approximately 40mA.
(Reference) In case of using R1, typical intensity (le1typ) and maximum intensity (le1max) on
1) LEDV
2) Caution in designing board lay-out
3) Notes
Part symbol
Attached components
Notes
•
(V
To get maximum potential from RPM882-H14, please keep in mind following instruction.
•
⇒This is to minimize feedback supplied to photo diode from RXD.
•
•
•
•
•
might be on error if used by different signal format.
•
be close to photo diode side (1pin).
generates noise, such as DC / DC converter.
(for < 90µs, ON duty ≤ 50%).
Dusts of scratch on the lens may effect the characteristics of product. Please handle it with care.
Other power source can be used difference between LEDV
The line of RXD (6pin) should be connected at backside via through hole close to RPM882-H14 pin lead. Better not to
As for C1 between 1-3 pin should be placed close to RPM882-H14.
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 TX-RC (4pin) and the TXD (7pin) input to be “L” (under 0.3V) except transmitting data
Power down current might increase if exposed by strong light (ex. direct sunlight) at powerdown mode.
Please use by the signal format at IrDA operating mode which is specified by IrDA Ver1.2 (2.4k to 115.2kbps). There
Please pay attention to the lens carefully.
C1
R1
IO
< V
CC
CC
(8pin), V
Duty : LED duty at emitting
le1typ=300 × (VLEDV
le1max=600 × (VLEDV
axis are described as below.
+ 0.3V)
1µF, tantalum or ceramic
4.7Ω±5%, 1/8W
Ex.) TCFGA1A105M8R (ROHM)
(VLEDV
CC
CC
Recommended value
−1.28) / le1−5.0
CC
(3pin) and V
=3V)
CC
CC
IO
−1.28) / (R1+3.5)
−1.28) / (R1+3.5)
(2pin)
(Duty ≤ 50%)
Bigger capacitance is recommended with much noise from power supply
At LED Emitting Duty=20%
CC
and V
CC
and V
IO
Notice
.
RPM882-H14
CC
[V],
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