RPM841-H16E4A2 Rohm Semiconductor, RPM841-H16E4A2 Datasheet - Page 8

• Manufacturer Part Number: RPM841-H16E4A2
• Description: MODULE IRDA 115.2KBPS 7-SMD
• Manufacturer: Rohm Semiconductor

Specifications of RPM841-H16E4A2

• 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−1.31) / (R1+5.8)
∗ Please set up to be ILED / Duty < 250[mA]
∗ At IrDA Mode, LED current is constantly approximately 50mA.
(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
Notes
Attached components
•
To get maximum potential from RPM841-H16, please keep in mind following instruction.
•
⇒This is to minimize feedback supplied to photo diode from RXD.
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•
•
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be close to photo diode side (7pin).
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 (4pin) should be connected at backside via through hole close to RPM841-H16 pin lead. Better not to
As for C1 between 6-7 pin should be placed close to RPM841-H16.
Better to be placed more than 1.0cm in radius from photo diode (pin7 side) and also away from the parts which
Please be sure to set up the TX-RC (2pin) and the TXD (3pin) 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.
might be on error if used by different signal format.
C1
R1
CC
(1pin), V
Duty : LED duty at emitting
le1typ=280 × (VLEDV
le1max=560 × (VLEDV
axis are described as below.
1µF, tantalum or ceramic
2.2Ω±5%, 1/8W
Ex.) TCFGA1A105M8R (ROHM)
(VLEDV
CC
CC
Recommended value
−1.31) / le1−7.2
CC
(6pin)
=3V)
CC
CC
−1.31) / (R1+5.8)
−1.31) / (R1+5.8)
(Duty ≤ 25%)
Bigger capacitance is recommended with much noise from power supply
At LED Emitting Duty=25%
CC
and V
CC
.
Notice
RPM841-H16
Rev.B
CC
[V],
8/9