RPM971-H14
Photo Link Module
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IrDA Infrared Communication Module
RPM971-H14
RPM971-H14 is an infrared communication module for IrDA V er . 1.4 (Low Power). The infrared LED, PIN photo diode,
and waveform shaping LSI are all integrated into one single package. This module is designed for low power
consumption. The very small package makes it a perfect fit for mobile devices.
zFeatures
1) Infrared LED, PIN photo diode, LED driver and receiver frequency formation circuit built in.
Improvement of EMI noise protection by Shield Case.
2) Applied to SIR (9.6k to 1 15.2kbps), MIR (0.576M, 1.152Mbps) and FIR(4Mbps).
3) Surface mount type.
4) Power dow n func tion bui lt in.
5) Adjustable communication distance by LED load resistance value.
zA pplications
Cellular phone, PDA, DVC, Digital still camera, Printer , Handy terminal etc.
zA bsolute maximum ratings (Ta=25°C)
Parameter Symbol Limits Units
Supply voltage Vcc
/
V
LEDA
/
V
IO
6.5
−25 to 85
−30 to 100
V
mW
−0.3 to V
IO
+0.3
Operation temperature
Storage temperature
Input voltage
Topr
Tstg
Vin(3,4,5pin)
°C
°C
V
mALED peak current
Power dissipation
Ifp
Pd
400
300
∗1
∗2
∗3
∗1) This applies to all pins basis ground pin (8pin).
∗2) LED Peak Current : <
90 µs, On duty <
25%
∗3) When glass-epoxy board (70x70x1.6mm) mounted. In case of operating environment is over 25°C, 4mW
would be reduced per each 1˚C stepping up.
zRecommended operating conditions
Supply voltage
Parameter Symbol Min. Typ. Max. Units
V
CC
3.0 V2.4 3.6
V
LEDA
V
IO
3.0 V2.7 5.5
3.0 V1.7 V
CC
RPM971-H14
Photo Link Module
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zTerminal description
Terminal Circuit FunctionPin No
1 LEDA
Connect to Ground.
2NC
RXD
V
CC
V
IO
Shield Case
3
4
5
6
7
−
TXD
V
IO
V
IO
8 GND GROUND
LED Anode Terminal
NC
This terminal must be left open.
Transmitting Data Input Terminal
H:LED radiant (PWDOWN='L')
CMOS Logic Level Input.
V
IO
V
IO
PWDOWN
300k
600k
When PWDOWN(5pin)='H', the RXD output will be pulled
up to V
IO
at approximately 300 kΩ.
PWDOWN
/Mode
Power-down Control and Mode SettingTerminal
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.
V
CC
Supply voltage for Transceiver circuits.
For preventing from infection, connect a capacitor between
GND(8pin).
V
IO
Supply voltage for I / O pins
(PWDOWN,RXD,TXD).
Other power source can be used difference between
LEDV
CC
and V
CC
.
LED current depends on LED load resistance value.
Include internal current limiter (max.400mA).
Holding TXD="H"status, LED will be turn off
approximately 48 µs.
Receiving Data Output Terminal
LED
RPM971-H14
Photo Link Module
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zElectrical characteristics (Unless otherwise noted, V
CC
=3V, VL EDV
CC
=3V, VIO=3V, Ta=25°C)
Parameter Symbol Min. Typ. Max. Unit Conditions
Consumption current 1(SMIR mode) ICC1
ICC2
VPDH
VPDL
IPDH
IPDL
800 µA PWDOWN=0V, At no input light
PWDOWN=0V, At no input light
PWDOWN=V
IO
V
IO
=1.7 to 3.6 V
Consumption current 2(FIR mode)
Transmission rate
PWDOWN input high voltage
PWDOWN input low voltage
PWDOWN input high current
PWDOWN input low current
TXD input high voltage
TXD input low voltage
RXD output high voltage
RXD output rise time
RXD output fall time
RXD output pulse width(SIR)
Receiver latency time
RXD output low voltage
TXD input high current
TXD input low current
LED anode current
400 1000
400
0
−
0.0096
−
−
2/3∗V
IO
2/3∗V
IO
1/3∗V
IO
1/3∗V
IO
10
1600
µA
1600
ICC3PWDOWN=V
IO
, At no input light
Consumption current 3(at PWDOWN) 0.01
−µA
0.2 Mbps4 V
V
V
IO
<
Transmitter >
<
Receiver >
VTXH
VTXL
ITXH
ITXL
ILED1
VRXH
VRXL
tRR
tFR
tRT
twRXDS
twRXDF1
twRXDF2
PWDOWN=0V
TXD=V
IO
TXD=0V
0
−1.0
0
2.5
−1.0
−
0
−
−
1.0
−
V
IO
−0.4
0
−1.0
−
−
5
0
170
−
−
20
20
2.3
100
µA
1.0
µA
1.0
V
V
µA
µA
V
V
ns
ns
µs
µs
V
IO
1.0
−
V
IO
0.4
−
−
4.0
200
IRXH= −200µA
IRXL=200µA
CL=15pF
CL=15pF
CL=15pF, 9.6k to 115.2 kbps, duty19%
RXD output pulse width(MIR2) twRXDM2 100 217 ns500 CL=15pF, 1.152 Mbps, duty25%
RXD output pulse width(MIR1) twRXDM1 200 434 ns800 CL=15pF, 0.576 Mbps, duty25%
CL=15pF, 4 Mbps(125ns pulse)
CL=15pF, 4 Mbps(250ns pulse)
V
IO
=1.7 to 3.6 V
(V
IO
VCC)
mA
(V
IO
VCC)
R1=5.6Ω
ns
ns
16585
195 250 290
125RXD output pulse width(FIR1)
RXD output pulse width(FIR2)
<
−
<
−
zOptical characteristics (Unless otherwise noted, V
CC
=3V, VLEDV
CC
=3V, VIO=3V, Ta=25 °C)
Parameter Symbol Min. Typ. Max. Unit Conditions
Peak wave length
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.
λP
IE
θD / 2
TLEDmax
Tr / Tf
Tj
Eemin1
870 nm
TXD=V
IO
10% to 90%
Intensity
Rise time / Fall time
Optical over shoot
Edge jitter
Minimum irradiance in angular1
Input half−angle
Maximum emitting time
850
6325
−
±18
900
mW
/
sr−
µW
/
cm
2
deg
ns
deg
µs
120
−−
−
−
−
−
±15
16
%
25
ns
40
−−
8
Half−angle θL / 2
−
−25 25
−
Minimum irradiance in augular2 Eemin2 20
mW
/
cm
2
500 −
Maximum irradiance in augular Eemax −
µW
/
cm
2
−−
48
Optical pulse width(MIR)
Optical pulse width(FIR)
TweM 172 217 256 ns tTXD=217ns
TweF 115 125 135 ns tTXD=125ns
<
−<
−
<
−<
−<
−
<
<
−<
−
<
−<
−
−15 deg θ L 15 deg
R1=5.6Ω
−15 deg θ L 15 deg, 115.2kbps
−15 deg θ L 15 deg, 115.2kbps
−15 deg θ L 15 deg
RPM971-H14
Photo Link Module
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zTiming chart
1. Mode Setting (SIR / MIR / FIR)
With RPM97 1-H14 there i s a need for mode s witch accor ding to commun icati on rate. F or th e mode setting, ther e
are “PWDOWN/Mode” and “TXD”. Please see below diagram for the set up of mode.
(a) FIR Mode
ts 200ns
=
>ts 200ns
=
>
tdmax=200µs
FIR Mode
(4Mbps)
P
WDOWN
/
Mode
TXD
Mode
(b) SIR / MIR Mode
ts 200ns
=
>ts 200ns
=
>
tdmax=200µs
SIR / MIR Mode
(9.6k-1.152Mbp
s)
PWDOWN
/
Mode
TXD
Mode
Fig. 1
2. T iming chart (use example)
(a) Emitting
When a pulse is inputted to TXD terminal, LED is emitting, and a signal is transmitted.
But, when “H” co ndition follow s TXD te rminal, LED turn s off the lig hts in the range o f TLEDmax.
TXD
more than TLEDmax
TLEDmax
less than TLEDmax
PWDOWN
L
ED emitting
RPM971-H14
Photo Link Module
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(b) Detecting
When it is received an optical signal, a signal outpu ts from RXD termina l at the following ti ming.
It is outputted in the pulse width fixed at the time of SIR mode (9.6k to 1 15.2kbps).
It is outputted in the pulse width which is the same as the input signal at the time of MIR mode (0.576M, 1.152Mbps)
and FIR mode (4Mbps).
But, as for the pulse width of the input signal, it is based on IrDA Physical Layer Sp ecification.
Light input
1 SIR mode (output example)
less than 2.3µs more than 2.3µs
approximately 2.3µs
300kΩ pull up
PWDOWN
RXD
Light input
2 MIR mode (output example)
434ns 217ns
434ns 217ns
300kΩ pull up
PWDOWN
RXD
Light input
3 FIR mode (output example)
125ns 250ns
125ns 250ns
300kΩ pull up
PWDOWN
RXD
RPM971-H14
Photo Link Module
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zExternal dimensions (Unit : mm)
2.COPLANARITY : 0.1mmMAX
1.TOLERANCE : ±0.2mm
UNIT : mm
NOTE
ETH396
PinPD
LED
81
2.67
R1.0 R1.1
2.9
0.95
P0.95×7=6.65
2.59
0.37±0.1
4.0
1.4
1.1
2.2
0.78 0.15±0.1
0.76
0.15±0.1
1.0
8.0
2.8
2.2
RPM971-H14
Photo Link Module
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zBlock diagram and applicati on circuit
AMP
18765432
AMP
AMP
POWER
DOWN
/Mode
TXD
TXD
RXD
C1
LEDA
NC
RXD
PWDOWN/Mode
VCC
VIO
GND
PWDOWN
/Mode
VCC
VIO
GND
R1 LEDVCC
zA tta ched components
C1
R1
Part symbol Recommended value
6.8µF, Ceramic or tantalum Bigger capacitance is recommended with
much noise from power supply.
Including LED's distribution within ±15deg.
5.6Ω ±5%, 1/4W (LEDV
CC
=3.0V)
10Ω ±5%, 1/4W (LEDV
CC
=3.7V)
18Ω ±5%, 1/4W (LEDV
CC
=5.0V)
Ex.)TCFGA1A685M8R(ROHM)
Notice
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
CC
[V], minimum
necessary of irradiant intensity Ie1 [mW / sr]
R1 = 170 × (VLEDV
CC
− 1.45) / Ie 1 −5 [Ω]
ILED = Duty × (VLEDV
CC
− 1.36) / (R1+4) [A]
Duty : LED duty at emitting
∗ Please set up to be ILED < 180[mA] (Duty ≤ 25%).
RPM971-H14
Photo Link Module
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zNotes
1) VLEDV
CC
(1pin), V
CC
(6pin) and V
IO
(7pin)
•
There is no problem even if it is supplied separately from each power supply such as a fix voltage power supply and a
battery p ower su pply.
But, use it in the recommendation power supply voltage range.
2) Caution in designing board lay-ou t
To get maximum potential from RPM971-H14, please keep in mind following instruction.
•
The line of RXD (4pin) should be connected at backside via through hole close to RPM971-H14 pin lead. Better not
to be close to photo diode side (8pin side).
⇒This is to mi nimize feedback supplie d to photo diode from RXD.
•
The parts which generate noise such as DC / DC converter should be one’s placed at more than a radius of 1.0cm
away from photo diode (8pin side).
•
As for C1 between 6 - 8 pins, it should be one’s placed close to RPM971-H14.
3) Notes
•
Please be sure to set up the TXD (3pin) input to be “L” (under 0.6V) except transmitting data.
(For < 90µ sec. ON duty < 25% ).
•
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 er1.3 (Low Power).
There might be on error if used by different signal format.
<Communication rate and pulse continuous time>
Signaling Rate Modulation
2.4kbit/s RZI
Rate Tolerance
% of Rate Pulse Duration
Minimum Pulse Duration
Nominal Pulse Duration
Maximum
+/− 0.87 1.41µs 78.13µs 88.55µs
9.6kbit/s RZI +/− 0.87 1.41µs 19.53µs 22.13µs
19.2kbit/s RZI +/− 0.87 1.41µs 9.77µs 11.07µs
38.4kbit/s RZI +/− 0.87 1.41µs 4.88µs 5.96µs
57.6kbit/s RZI +/− 0.87 1.41µs 3.26µs 4.34µs
115.2kbit/s RZI +/− 0.87 1.41µs 1.63µs 2.23µs
0.576Mbit/s RZI +/− 0.1 295.2ns 434.0ns 520.8ns
1.152Mbit/s RZI +/− 0.1 147.6ns 217.0ns 260.4ns
4.0Mbit/s
single pulse
double pulse
4PPM
4PPM
+/− 0.01 115.0ns 125.0ns 135.0ns
+/− 0.01 240.0ns 250.0ns 260.0ns
•
Please pay attention to the lens carefully.
Dusts or scratch on the lens may effect the characteristics of product, p lease handle it with care.
4) Eye safe
•
Eye safe is based on EN60825-1(IEC60825-1 amendment 2), Class1 Eye safe.
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.
