RPM971-H14
Photo Link Module
IrDA Infrared Communication Module
RPM971-H14
RPM971-H14 is an infrared communication module for IrDA Ver. 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.
Features
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 115.2kbps), MIR (0.576M, 1.152Mbps) and FIR(4Mbps).
3) Surface mount type.
4) Power down function built in.
5) Adjustable communication distance by LED load resistance value.
Applications
Cellular phone, PDA, DVC, Digital still camera, Printer, Handy terminal etc.
Absolute maximum ratings
(Ta=25°C)
Parameter
Supply voltage
Input voltage
Operation temperature
Storage temperature
LED peak current
Power dissipation
Symbol
Vcc / V
LEDA
/ V
IO
Vin(3,4,5pin)
Topr
Tstg
Ifp
Pd
Limits
6.5
∗1
−0.3
to V
IO
+0.3
−25
to 85
−30
to 100
400
∗2
300
∗3
Units
V
V
°C
°C
mA
mW
∗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.
Recommended operating conditions
Parameter
Symbol
V
CC
Supply voltage
V
LEDA
V
IO
Min.
2.4
2.7
1.7
Typ.
3.0
3.0
3.0
Max.
3.6
5.5
V
CC
Units
V
V
V
1/8
RPM971-H14
Photo Link Module
Terminal description
Pin No
Terminal
Circuit
Function
LED Anode Terminal
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).
NC
2
NC
V
IO
3
TXD
600k
This terminal must be left open.
Transmitting Data Input Terminal
H:LED radiant (PWDOWN='L')
CMOS Logic Level Input.
Holding TXD="H"status, LED will be turn off
approximately 48
µs.
Receiving Data Output Terminal
PWDOWN
300k
4
RXD
When PWDOWN(5pin)='H', the RXD output will be pulled
up to V
IO
at approximately 300 kΩ.
LED
1
LEDA
V
IO
V
IO
V
IO
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).
GROUND
Connect to Ground.
5
6
V
CC
7
8
−
V
IO
GND
Shield Case
2/8
RPM971-H14
Photo Link Module
Electrical characteristics
(Unless otherwise noted, V
CC
=3V, VLEDV
CC
=3V, VIO=3V, Ta=25°C)
Parameter
Consumption current 1(SMIR mode)
Consumption current 2(FIR mode)
Consumption current 3(at PWDOWN)
Transmission rate
PWDOWN input high voltage
PWDOWN input low voltage
PWDOWN input high current
PWDOWN input low current
< Transmitter >
TXD input high voltage
TXD input low voltage
TXD input high current
TXD input low current
LED anode current
< Receiver >
RXD output high voltage
RXD output low voltage
RXD output rise time
RXD output fall time
RXD output pulse width(SIR)
RXD output pulse width(MIR1)
RXD output pulse width(MIR2)
RXD output pulse width(FIR1)
RXD output pulse width(FIR2)
Receiver latency time
VRXH
VRXL
tRR
tFR
twRXDS
twRXDM1
twRXDM2
twRXDF1
twRXDF2
tRT
V
IO
−0.4
0
−
−
1.0
200
100
85
195
−
−
−
20
20
2.3
434
217
125
250
100
V
IO
0.4
−
−
4.0
800
500
165
290
200
V
V
ns
ns
µs
ns
ns
ns
ns
µs
IRXH=
−200µA
IRXL=200µA
C
L
=15pF
C
L
=15pF
C
L
=15pF,
9.6k to 115.2 kbps, duty19%
C
L
=15pF,
0.576 Mbps, duty25%
C
L
=15pF,
1.152 Mbps, duty25%
C
L
=15pF,
4 Mbps(125ns pulse)
C
L
=15pF,
4 Mbps(250ns pulse)
VTXH
VTXL
ITXH
ITXL
ILED1
2/3∗V
IO
0
2.5
−1.0
−
−
−
5
0
170
V
IO
1/3∗V
IO
10
1.0
−
V
V
µA
µA
mA
V
IO
=1.7
to 3.6 V
(V
IO
<
V
CC
)
−
TXD=V
IO
TXD=0V
R1=5.6Ω
VPDH
VPDL
IPDH
IPDL
Symbol
I
CC
1
I
CC
2
I
CC
3
Min.
400
400
−
0.0096
2/3∗V
IO
0
−1.0
−1.0
Typ.
800
1000
0.01
−
−
−
0
0
Max.
1600
1600
0.2
4
V
IO
1/3∗V
IO
1.0
1.0
Unit
µA
µA
µA
Mbps
V
V
µA
µA
V
IO
=1.7
to 3.6 V
(V
IO
<
V
CC
)
−
PWDOWN=V
IO
PWDOWN=0V
Conditions
PWDOWN=0V, At no input light
PWDOWN=0V, At no input light
PWDOWN=V
IO
, At no input light
Optical characteristics
(Unless otherwise noted, V
CC
=3V, VLEDV
CC
=3V, VIO=3V, Ta=25°C)
Parameter
Peak wave length
Intensity
Half−angle
Rise time / Fall time
Optical over shoot
Edge jitter
Optical pulse width(MIR)
Optical pulse width(FIR)
Minimum irradiance in angular1
Minimum irradiance in augular2
Maximum irradiance in augular
Input half−angle
Maximum emitting time
Tj
TweM
TweF
Eemin1
Eemin2
Eemax
θD
/ 2
TLEDmax
Symbol
λP
IE
θL
/ 2
Tr / Tf
Min.
850
25
−
−
−
−25
172
115
−
−
500
±15
16
Typ.
870
63
±18
−
−
−
217
125
−
−
−
−
48
Max.
900
−
−
40
25
25
256
135
8
20
−
−
120
Unit
nm
mW / sr
deg
ns
%
ns
ns
ns
µW
/ cm
2
µW
/ cm
2
deg
µs
TXD=V
IO
tTXD=217ns
tTXD=125ns
−15
deg
< θ
L
<
15 deg,
<
115.2kbps
−
−
−
−15
deg
< θ
L
<
15 deg,
<
115.2kbps
−
−
10% to 90%
−15
deg
< θ
L
<
15 deg
−
−
R1=5.6Ω
Conditions
mW / cm
2
−15
deg
< θ
L
<
15 deg
−
−
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.
3/8
RPM971-H14
Photo Link Module
Timing chart
1. Mode Setting (SIR / MIR / FIR)
With RPM971-H14 there is a need for mode switch according to communication rate. For the mode setting, there
are “PWDOWN/Mode” and “TXD”. Please see below diagram for the set up of mode.
(a) FIR Mode
(b) SIR / MIR Mode
PWDOWN
/ Mode
ts
>
200ns
=
ts
>
200ns
=
PWDOWN
/ Mode
ts
>
200ns
=
ts
>
200ns
=
TXD
tdmax=200µs
TXD
tdmax=200µs
FIR Mode
(4Mbps)
Mode
Mode
SIR / MIR Mode
(9.6k-1.152Mbps)
Fig. 1
2. Timing chart (use example)
(a) Emitting
When a pulse is inputted to TXD terminal, LED is emitting, and a signal is transmitted.
But, when “H” condition follows TXD terminal, LED turns off the lights in the range of TLEDmax.
TXD
less than TLEDmax
more than TLEDmax
LED emitting
TLEDmax
PWDOWN
4/8
RPM971-H14
Photo Link Module
(b) Detecting
When it is received an optical signal, a signal outputs from RXD terminal at the following timing.
It is outputted in the pulse width fixed at the time of SIR mode (9.6k to 115.2kbps).
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 Specification.
1 SIR mode (output example)
Light input
less than 2.3µs
more than 2.3µs
RXD
approximately 2.3µs
300kΩ pull up
PWDOWN
2 MIR mode (output example)
Light input
434ns
217ns
RXD
434ns
217ns
300kΩ pull up
PWDOWN
3 FIR mode (output example)
Light input
125ns
250ns
RXD
125ns
250ns
300kΩ pull up
PWDOWN
5/8
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