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PDF RPM871 Data sheet ( Hoja de datos )
| Número de pieza | RPM871 | |
| Descripción | IrDA Infrared communication Module | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de RPM871 (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
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Photo Link Module
RPM871-H7
IrDA Infrared communication Module
RPM871-H7
RPM871-H7 is an infrared communication module for IrDA Ver. 1.2 (Low Power). The infrared LED, PIN photo diode,
waveform shaping LSI are all integrated into a single package. This module is designed with power down function and
low current consumption at stand-by mode. The ultra small package makes it a perfect fit for mobile devices.
!Features
1) Applied to IrDA version 1.2. (Low Power)
2) Designed for low power consumption at stand-by for receiving (Typ.73µA).
3) Suitable for sets driven by battery due to power down control function.
4) Power supply voltage range : 2.6V∼3.6V
5) Constant LED load resistance can change communication range. (Approx. 20∼60cm)
!Applications
Cellular phones, PDAs, etc.
!Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Limits
Unit
Power supply voltage
Power dissipation
VCC −0.3~+7.0 V
Pd
150∗1
mW
Operating temperature range Topr
−20~+85
°C
Storage temperature range
Tstg
−30~+100
°C
LED peak current
IFP
200∗2
mA
∗1 70mm×70mm, t=1.6mm, glass epoxy mounting. Derating : 2mW/°C for operation above Ta=25°C
∗2 LED peak current<90µs. ON duty<20%
!Recommended operating conditions (Ta = 25°C)
Parameter
Symbol Min. Typ.
Power supply voltage
VCC 2.6 2.8
VLEDA 2.6 2.8
Max.
3.6
5.5
Unit
V
V
1 page  
Photo Link Module
!Timing chart
(Emitting side)
TXD
(7pin)
less than 45µs
more than 45µs
(emitting)
(emitting)
Internal LED
(Light output)
approximately 45µs
(Detecting side)
Light input
less than 2.3µs
more than 2.3µs
RXD
(6pin)
approximately 2.3µs
approximately 2.3µs
RPM871-H7
(emitting)
pull up to VCC at approximately 300kΩ
PWDOWN
(5pin)
!Attached components
Recommended values
Part symbol
Recommended value
C1
1µF, tantalum or ceramic
Ex.) TCFGA1A105M8R (ROHM)
R1
7.5Ω±5%, 1/4W
(VLEDVCC=2.8V)
Notice
Bigger capacitance is recommended with much noise from power supply
More than 60cm distance, more than 4[µW/cm2] at detecting side.
(vs ver1.0)
More than 46cm distance, more than 6.8[µW/cm2] at detecting side.
(vs RPM871-H7)
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 : VLEDVCC[V],
Link distance : d[cm] (Including LED’s distribution within ±15deg)
R1=T × (VLEDVCC−1.45) / d2−3.5 [Ω]
ILED=Duty × (VLEDVCC−1.36) / (R1+2.5) [A]
Duty : LED duty at emitting
T : 17300 (vs. RPM871-H7), 29400 (vs. ver1.0)
∗ Please set up to be ILED / Duty < 200[mA] (Duty < 20%)
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet RPM871.PDF ] | |
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