RPM870-H14
Photo Link Module
1/6
IrDA wireless communication transceiver
IC (support s Ver. 1.2 Low Power)
RPM870-H14
The RPM870-H14 is an Module that supports IrDA V er . 1.2 (Low Power), and is ideal for wireless communications.
An infrared LED, a pin-photo diode, and LSI are all contained in a very small single package. It is also equipped with low
power consumption and power down func tions making this IC perfect for mobile sets.
zFeatures
1) Applied to IrDA V er . 1.2. (Low Power)
2) Low power consump tion while w aiting mode. (90µA Typ.).
3) A power-down function is perfect for battery app lications.
4) Supports a board pow er supply volta ge range from 2.6V to 3. 6V.
5) Only 1 external capacitor required.
zA pplications
Mobile phones, PDAs, and others
zA bsolute maximum ratings (Ta = 25°C)
Parameter Symbol Limits Unit
Supply voltage V
CC
7.0
−0.3 to V
CC
+0.3
−20 to +85
−30 to +100
V
V
mW
Input voltage Vin
100
Operating temperature
Storage temperature
Power dissipation
Topr
Tstg
Pd
°C
°C
zRecommended operating conditions (Ta = 25°C)
Parameter Symbol Min. Typ. Max. Unit
Supply voltage V
CC
3.0 V2.6 3.6
V
LEDA
3.0 V2.6 5.5
RPM870-H14
Photo Link Module
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zBlock diagram and application c ircuit
AMP
1
8
AMPAMP
POWER
DOWN
234567
V
CC
V
CC
GND
GND
NC
GND C1
PWDOWN
RXD
TXD
LEDA
PWDOWN
RXD
TXD
(LEDV
CC
)
Recommended values
Part symbol
C1
Recommended value Notice
1µF, tantalum
Ex.) TCFGA1A105M8R (ROHM) Bigger capacitance is recommended with much noise from power supply
RPM870-H14
Photo Link Module
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zTerminal description
Terminal Circuit Function
Pin No
1, 4 GND GND
This terminal must be left open.2NC
PWDOWN
RXD
TXD
LEDA
3
5
6
7
8
VCC
VCC
For preventing from ripple noise.
connect a capacitor between
VCC (3pin) and GND (4pin).
LED
VCC
VCC
200K
Power-down control terminal
H : POWERDOWN
L : OPERATION
CMOS logic level input
When input is H, it will stop
the receiving circuit, Pin-PD
current and transmitting LED operation.
Receiving data output terminal
CMOS logic level input
When PWDOWN (5pin) = H, the RXD
output will be pulled up to
VCC at approximately 300kΩ.
Transmitting data input terminal
H : LED Drive (PWDOWN = L)
CMOS logic level output
Holding TXD = "H"status, LED will
be turn off approximately 48µsec.
LED ANODE terminal
Other power source can be used
difference between LEDVCC and VCC.
VCC
VCC
300k
PWDOWN
RPM870-H14
Photo Link Module
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zElectrical characteristics (Unless otherwise noted, VCC=3V, VLED VCC=3V , Ta=25°C)
Symbol Min. Typ. Max. Unit Conditions
I
CC
1
I
CC
2
VPDH
VPDL
IPDH
IPDL
90 µA
PWDOWN
=
V
CC
[V]
−
0.01
−
−
−
2.4
−
−
V
CC
−0.5
120
µA
0.2
kbps115.2
V
V
−
0.55
<Transmitter>
<Receiver>
VTXH
VTXL
ITXH
ITXL
ILEDA
VRXH
VRXL
tRR
tFR
tRT
twRXD
PWDOWN
=
0 [V]
TXD
=
V
CC
[V]
TXD
=
0 [V]
0
−1.0
V
CC
−0.55
−
7.5
−1.0
−
−
−
−
1.5
V
CC
−0.5
0
−1.0
−
−
15
0
50
−
−
70
30
2.3
100
µA
1.0
µA
1.0
V
V
µA
µA
mA
V
V
nsec
nsec
µsec
µsec
−
0.55
30
1.0
−
−
0.4
−
−
3.6
200
IRXH
=
−50µA
IRXL
=
200µA
C
L
=
15pF
C
L
=
15pF
C
L
=
15pF, 2.4 to 115.2Kbps
Parameter
−
Consumption Current 1
Consumption Current 2
Transmission rate
PWDOWN INPUT High Voltage
PWDOWN INPUT High Current
PWDOWN INPUT Low Voltage
PWDOWN INPUT Low Current
TXD INPUT High Voltage
TXD INPUT High Current
TXD INPUT Low Voltage
TXD INPUT Low Current
LED ANODE Current
RXD OUTPUT High Voltage
RXD OUTPUT Low Voltage
RXD OUTPUT Rise Time
RXD OUTPUT Fall Time
RXD OUTPUT Pulse Width
Receiver Latency Time
Waiting mode, no input light.
PWDOWN
=
V
CC
[V] , no input light.
zOptical characteristics (Unless otherwise noted, VCC=3V, VLEDVCC=3V, T a=25°C)
Parameter Symbol Min. Typ. Max. Unit Conditions
Peak wave length λP
IE1
θL / 2
θD / 2
TLEDmax
Tr / Tf
Tj
Ee
870 nm
−15˚ ≤ θL ≤ 15˚
−15˚ ≤ θL ≤ 15˚
TXD=VCC
10% to 90%
Intensity
Half-Angle
850
104.0
−
−
−
±15
900
mW / sr26
mW / cm2
deg
nsec
deg
µsec
−
100
−−
−
−
−
48
−40
0.0068
±15
16
%25
nsec40
500
−
96
Rise time / Fall time
Optical over shoot
Edge jitter
Irradiance in angular
INPUT Half-Angular
Maximum Emitting Time
1.This product is not designed for protection against radioactive rays.
2.This product dose not include laser transmitter.
3.This product includes one pin photo diode.
4.This product dose not include optical load.
RPM870-H14
Photo Link Module
5/6
zTiming chart
more than 48 µsec
approximately 48 µsec
less than 2.3 µsec more than 2.3 µsec
approximately 2.3 µsecapproximately 2.3 µsec
pull up to V
CC
at
approximately 300kΩ
(Emitting side)
(Detecting side)
TXD
(7pin)
Internal LED
(Light output)
Light input
RXD
(6pin)
PWDOWN
(5pin)
less than 48 µsec
(emitting) (emitting) (emitting)
zNotes
1) LEDVCC (8pin) and VCC (3pin)
• Other pow er source can be used di fference be tween LEDVCC and VCC.
2) Caution in designing board lay-ou t
To get maximum potential from RPM870-H14, please keep in mind following instruction.
• The line of RXD (6pin) should be connected at backside via through hole close to RPM870-H14 pin lead. Better not
to be cl ose to photo diode side (1pin).
⇒This is to mi nimize feedback supplie d to photo diode from RXD.
• As for C1 between 3-4 pin should be placed close to RPM870-H14.
• Better to be placed more than 1.0cm in radius from photo diode (pin1 side) and also away from the parts which
generate s noise, such as DC / DC converter.
3) Others
• Please be sure to set up the TXD (7pin) input to be “L” (under 0.5V) except transmitting data
(for < 90µsec. on duty < 20%).
• Powerdown current might increase if exposed by strong light (ex. direct sunlight) at powerdown mode.
• Please use by the signal format which is specified by IrDA V er1.2 (Low Power). There might be on error if used by
different signal format.
• Please pay attention to the lens carefully. Dusts of scratch on the lens may effect the characteristics of product. Please
handle i t with care.
4) Eye Safe
• IEC825-1 (EN6 0825-1) Class 1 Eye Safe .
RPM870-H14
Photo Link Module
6/6
zDimensions (Unit : mm)
18
NOTE
UNIT : mm
A
LED
PinPD
1.TOLERANCE : ±0.2mm
2.COPLANARITY : 0.1mmMAX
ETH839
0.6 0.48
2.8
8.0
1.0
0.15±0.1
0.76
0.15±0.1
0.78
2.2
1.1
1.4
4.0
0.37±0.1
2.59
(0.13)
P0.95×7=6.65
0.95
2.2
0.75
2.67
R1.0
R1.1
0.68±0.1
0.6±0.1
2.9
A Part Size (Shield Case underside size)
2.2
Appendix
Appendix1-Rev1.1
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level of
reliability and the malfunction of with would directly endanger human life (such as medical instruments,
transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other
safety devices), please be sure to consult with our sales representative in advance.
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document are no antiradiation design.
About Export Control Order in Japan
Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control
Order in Japan.
In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)
on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
