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. (75µA 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 = 25°C)
Parameter
Supply voltage
Input voltage
Operating temperature
Storage temperature
Power dissipation
Symbol
V
CC
Vin
Topr
Tstg
Pd
Limits
7.0
−0.3
to V
CC
+0.3
−20
to
+85
−30
to
+100
100
Unit
V
V
°C
°C
mW
Recommended operating conditions
(Ta = 25°C)
Parameter
Supply voltage
Symbol
V
CC
V
LEDA
Min.
2.6
2.6
Typ.
3.0
3.0
Max.
3.6
5.5
Unit
V
V
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RPM870-H14
Photo Link Module
Block diagram and application circuit
AMP
GND
1
2
NC
AMP
V
CC
V
CC
C1
GND
GND
4
AMP
3
POWER
DOWN
PWDOWN
PWDOWN
5
RXD
6
RXD
TXD
7
TXD
LEDA
8
(LEDV
CC
)
Recommended values
Part symbol
C1
Recommended value
1µF, 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.
V
CC
For preventing from ripple noise.
connect a capacitor between
V
CC
(3pin) and GND (4pin).
V
CC
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.
V
CC
PWDOWN
V
CC
300k
Function
3
V
CC
5
PWDOWN
Receiving data output terminal
CMOS logic level input
When PWDOWN (5pin) = H, the RXD
output will be pulled up to
V
CC
at approximately 300kΩ.
6
RXD
V
CC
Transmitting data input terminal
H : LED Drive (PWDOWN = L)
CMOS logic level output
Holding TXD = "H"status, LED will
be turn off approximately 48µsec.
7
TXD
200K
LED ANODE terminal
8
LEDA
LED
Other power source can be used
difference between LEDV
CC
and V
CC
.
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RPM870-H14
Photo Link Module
Electrical characteristics
(Unless otherwise noted, V
CC
=3V, VLEDV
CC
=3V, Ta=25°C)
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
I
CC
1
I
CC
2
Min.
−
−
2.4
V
CC
−0.5
−
−1.0
−1.0
V
CC
−0.5
−
7.5
−1.0
−
V
CC
−0.5
−
−
−
1.5
−
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
µA
µA
kbps
V
V
µA
µA
V
V
µA
µA
mA
IRXH
= −50µA
IRXL
=
200µA
C
L
=
15pF
C
L
=
15pF
TXD
=
V
CC
[V]
TXD
=
0 [V]
Conditions
Waiting mode, no input light.
PWDOWN
=
V
CC
[V]
, no input light.
VPDH
VPDL
IPDH
IPDL
PWDOWN
=
V
CC
[V]
PWDOWN
=
0 [V]
<Transmitter>
TXD INPUT High Voltage
TXD INPUT Low Voltage
TXD INPUT High Current
TXD INPUT Low Current
LED ANODE Current
VTXH
VTXL
ITXH
ITXL
ILEDA
<Receiver>
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
V
V
nsec
nsec
µsec
µsec
C
L
=
15pF, 2.4 to 115.2Kbps
Optical characteristics
(Unless otherwise noted, V
CC
=3V, VLEDV
CC
=3V, Ta=25°C)
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
θD
/ 2
TLEDmax
Symbol
λP
IE1
θL
/ 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 / cm
2
−15˚ ≤ θL ≤
15˚
deg
µsec
TXD=V
CC
10% to 90%
−15˚ ≤ θL ≤
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
µsec
(emitting)
more than 48
µsec
(emitting)
(emitting)
Internal LED
(Light output)
approximately 48
µsec
(Detecting side)
Light input
less than 2.3
µsec
more than 2.3
µsec
RXD
(6pin)
pull up to V
CC
at
approximately 300kΩ
approximately 2.3
µsec
approximately 2.3
µsec
PWDOWN
(5pin)
Notes
1) LEDV
CC
(8pin) and V
CC
(3pin)
•
Other power source can be used difference between LEDV
CC
and V
CC
.
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
<
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 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
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