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RPM870-H14
Photo Link Module
IrDA wireless communication transceiver IC (supports Ver. 1.2 Low Power)
RPM870-H14
The RPM870-H14 is an Module that supports IrDA Ver. 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 functions making this IC perfect for mobile sets.
Features 1) Applied to IrDA Ver. 1.2. (Low Power) 2) Low power consumption while waiting mode. (75A Typ.). 3) A power-down function is perfect for battery applications. 4) Supports a board power supply voltage range from 2.6V to 3.6V. 5) Only 1 external capacitor required.
Applications Mobile phones, PDAs, and others
Absolute maximum ratings (Ta = 25C)
Parameter Supply voltage Input voltage Operating temperature Storage temperature Power dissipation Symbol VCC Vin Topr Tstg Pd Limits 7.0 -0.3 to VCC+0.3 -20 to +85 -30 to +100 100 Unit V V C C mW
Recommended operating conditions (Ta = 25C)
Parameter Supply voltage Symbol VCC VLEDA Min. 2.6 2.6 Typ. 3.0 3.0 Max. 3.6 5.5 Unit V V
1/6
RPM870-H14
Photo Link Module
Block diagram and application circuit
AMP
GND
1
2
NC
AMP
VCC VCC C1 GND GND
4
AMP
3
POWER DOWN
PWDOWN PWDOWN
5
RXD
6
RXD
TXD
7
TXD
LEDA
8
(LEDVCC)
Recommended values
Part symbol C1 Recommended value 1F, tantalum Ex.) TCFGA1A105M8R (ROHM) Notice Bigger capacitance is recommended with much noise from power supply
2/6
RPM870-H14
Photo Link Module
Terminal description
Pin No 1, 4 2 Terminal GND NC Circuit GND This terminal must be left open. VCC For preventing from ripple noise. connect a capacitor between VCC (3pin) and GND (4pin).
VCC
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.
VCC PWDOWN VCC 300k
Function
3
VCC
5
PWDOWN
Receiving data output terminal CMOS logic level input When PWDOWN (5pin) = H, the RXD output will be pulled up to VCC at approximately 300k.
6
RXD
VCC
Transmitting data input terminal H : LED Drive (PWDOWN = L) CMOS logic level output Holding TXD = "H"status, LED will be turn off approximately 48sec.
7
TXD
200K
LED ANODE terminal
8
LEDA
LED
Other power source can be used difference between LEDVCC and VCC.
3/6
RPM870-H14
Photo Link Module
Electrical characteristics (Unless otherwise noted, VCC=3V, VLEDVCC=3V, Ta=25C)
Parameter
Consumption Current 1 Consumption Current 2 Transmission rate PWDOWN INPUT High Voltage PWDOWN INPUT Low Voltage PWDOWN INPUT High Current PWDOWN INPUT Low Current
Symbol ICC1 ICC2
Min. - - 2.4
Typ. 75 0.01 - - -
0 0 - - 15 0 30.5 - - 70 30 2.3 100
Max. 99 0.2 115.2 - 0.55
1.0 1.0 - 0.55 30 1.0 - - 0.4 - - 3.6 200
Unit A A kbps V V
A A V V A A mA IRXH = -50A IRXL = 200A CL = 15pF CL = 15pF TXD = VCC [V] TXD = 0 [V]
Conditions
Waiting mode, no input light. PWDOWN = VCC [V] , no input light.
VPDH VPDL IPDH IPDL
VCC-0.5 -
-1.0 -1.0 VCC-0.5 - 7.5 -1.0 -
PWDOWN = VCC [V]
PWDOWN = 0 [V]

TXD INPUT High Voltage TXD INPUT Low Voltage TXD INPUT High Current TXD INPUT Low Current LED ANODE Current
VTXH VTXL ITXH ITXL ILEDA
RXD OUTPUT High Voltage
RXD OUTPUT Low Voltage RXD OUTPUT Rise Time RXD OUTPUT Fall Time RXD OUTPUT Pulse Width Receiver Latency Time
VRXH VRXL tRR tFR twRXD tRT
VCC-0.5 - - - 1.5
-
V V nsec nsec sec sec
CL = 15pF, 2.4 to 115.2Kbps
Optical characteristics (Unless otherwise noted, VCC=3V, VLEDVCC=3V, Ta=25C)
Parameter Peak wave length Intensity Half-Angle Rise time / Fall time Optical over shoot Edge jitter Irradiance in angular INPUT Half-Angular Maximum Emitting Time Tj Ee D / 2 TLEDmax Symbol P IE1 L / 2 Tr / Tf Min. 850 4.0 - - - -40 0.0068 15 16 Typ. 870 10 18 - - - - - 48 Max. 900 26 - 100 25 40 500 - 90 Unit nm mW / Sr deg nsec % nsec mW / cm2 -15 L 15 deg sec TXD=VCC 10% to 90% -15 L 15 Conditions
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.
4/6
RPM870-H14
Photo Link Module
Timing chart
(Emitting side)
TXD (7pin)
less than 48 sec (emitting)
more than 48 sec
(emitting) (emitting)
Internal LED (Light output)
approximately 48 sec
(Detecting side)
Light input
less than 2.3 sec
more than 2.3 sec
RXD (6pin)
pull up to VCC at approximately 300k approximately 2.3 sec approximately 2.3 sec
PWDOWN (5pin)
Notes 1) LEDVCC (8pin) and VCC (3pin) * Other power source can be used difference between LEDVCC and VCC. 2) Caution in designing board lay-out 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 close to photo diode side (1pin). This is to minimize feedback supplied 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 generates 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 < 90sec. 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 Ver1.2 (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 it with care. 4) Eye Safe * IEC825-1 (EN60825-1) Class 1 Eye Safe.
5/6
RPM870-H14
Photo Link Module
External dimensions (Unit : mm)
R1.1
8.0
R1.0
2.2
2.2
PinPD 1.1 1.4 2.8 4.0 A
1.0
LED 0.78
0.150.1
0.150.1 0.76 2.59
2.9
2.67
A Part Size (Shield Case underside size)
0.75
1 0.370.1 0.95 P0.95x7=6.65 0.6
0.680.1
8
2.2
0.48
0.60.1
(0.13)
NOTE 1.TOLERANCE : 0.2mm 2.COPLANARITY : 0.1mmMAX UNIT : mm
ETH648
6/6
Appendix
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.
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. 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.
Appendix1-Rev1.1

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