RPM872-H7
Photo Link Module
Rev.B
1/6
IrDA infrared communication module
RPM872-H7
RPM872-H7 is an infrared communication module for IrDA Ver. 1.2 (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) Applied to IrDA Ver. 1.2. (Low Power)
2) Designed for low power consumption at waiting mode (75
A).
3) Low operating voltage
V
CC
=2.0V to 3.6V
VIO=1.5V to 3.6V
VLED=2.6V to 5.5V
4) Small package.
5) Power down function.
Applications
Cellular phones, PDA, Digital still camera, Handy terminals, and other portable equipments.
Absolute maximum ratings (Ta=25
C)
Power dissipation
Supply voltage
Operating temperature
Storage temperature
Parameter
Symbol
Limits
Unit
V
CC
7.0
-
20 to
+
85
-
30 to
+
100
V
mW
100
Topr
Tstg
Pd
C
C
Recommended operating conditions (Ta=25
C)
Supply voltage
Parameter
Symbol
Min.
Typ.
Max.
Unit
V
CC
3.0
V
2.0
3.6
VLEDA
VIO
3.0
V
2.6
5.5
3.0
V
1.5
V
CC
RPM872-H7
Photo Link Module
Rev.B
2/6
Block diagram and application circuit
AMP
1
8
76543
2
AMP
AMP
POWER
DOWN
V
CC
VIO
V
CC
V
CC
(3pin) and VLEDA(8pin) can be used on
either common power source or different one.
GND
C1
GND
VIO
GND
PWDOWN
RXD
TXD
LEDA
PWDOWN
RXD
TXD
(LEDV
CC
)
RPM872-H7
Photo Link Module
Rev.B
3/6
Terminal description
Function
Pin No
1, 4
GND
GND
Pin1 and Pin4 must be connected to the
ground.
VIO
Supply voltage for I/O pins (PWDOWN,
RXD, TXD)
Power-down Control Terminal
CMOS logic level input
When input is H, it will stop the receiving
circuit, Pin-PD current and transmitting
LED operation.
H : POWERDOWN MODE
L : OPERATING MODE
Connect to Ground.
2
VIO
PWDOWN
RXD
TXD
LEDA
Shield Case
3
5
6
7
8
-
V
CC
VIO
VIO
600k
LED
VIO
VIO
PWDOWN
300k
V
CC
Supply voltage for Transceiver circuits.
For preventing from infection,
connect a capacitor between
V
CC
(3pin) and GND(4pin).
Receiving Data Output Terminal
CMOS logic level output
When PWDOWN (5pin) = H, the RXD
output will be pulled up to
VIO at approximately 300k
.
Transmitting Data Input Terminal
H : LED (PWDOWN = L)
CMOS logic level input
Holding TXD = "H"status, LED will
be turn off approximately 48
s.
LED ANODE Terminal
Other power source can be used
difference between LEDV
CC
and V
CC
.
This can be connected to battery kinds
of unregulated voltage source by internal
constant current driver.
Terminal
Circuit
RPM872-H7
Photo Link Module
Rev.B
4/6
Electrical characteristics (Unless otherwise noted, V
CC
=3V, VLEDA=3V, VIO=3V, Ta=25
C)
PWDOWN INPUT High Voltage
PWDOWN INPUT High Current
PWDOWN INPUT Low Voltage
PWDOWN INPUT Low Current
Consumption Current 1
Parameter
Symbol
Min.
Typ.
Max.
Unit
Conditions
I
CC
1
I
CC
2
VPDH
VPDL
IPDH
IPDL
75
A
VPWDOWN = 0V. At no input light
VPWDOWN = VIO. At no input light
PWDOWN = VIO [V]
VIO = 1.8 to
3.6 [V]
VIO = 1.5 to 1.8 [V]
VIO = 1.8 to 3.6 [V]
VIO = 1.5 to
1.8 [V]
-
0.01
-
0
-
2.4
-
-
2/3
VIO
1.2
2/3
VIO
1.2
1/3
VIO
VIO
-
1.2
1/3
VIO
VIO
-
1.2
99
A
0.2
kbps
115.2
V
V
VIO
<Transmitter>
<Receiver>
VTXH
VTXL
ITXH
ITXL
ILEDA
VRXH
VRXL
tRR
tFR
tRT
twRXD
PWDOWN = 0 [V]
TXD = VIO [V]
TXD = 0 [V]
0
-
1.0
0
2.5
-
1.0
-
0
-
-
1.5
-
VIO
-
0.4
0
-
1.0
-
-
5
0
30.5
-
-
35
35
2.3
100
A
1.0
A
1.0
V
V
A
A
mA
V
V
ns
ns
s
s
VIO
10
1.0
-
VIO
0.4
-
-
4.2
200
IRXH =
-
200
A
IRXL = 200
A
C
L
= 15pF
C
L
= 15pF
C
L
= 15pF, 2.4 to 115.2kbps
VIO = 1.8 to 3.6 [V]
VIO = 1.5 to 1.8 [V]
VIO = 1.8 to 3.6 [V]
VIO = 1.5 to 1.8 [V]
Consumption Current 2
Transmission rate
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
Optical characteristics (Unless otherwise noted, V
CC
=3V, VLEDA=3V, VIO=3V, Ta=25
C)
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.
Parameter
Symbol
Min.
Typ.
Max.
Unit
Conditions
P
IE1
L / 2
D / 2
TLEDmax
Tr / Tf
Tj
Ee
870
nm
-
15
L
15
-
15
L
15
TXD=VIO
10% to 90%
850
10
4.0
-
18
-
-
900
mW / Sr
26
TWLED
TXD=1.63
s pulse input
1.63
1.42
s
2.02
mW / cm
2
deg
ns
deg
s
30
100
-
-
-
-
-
48
-
40
0.0068
15
16
%
25
ns
40
500
-
120
Peak wave length
Intensity 1
Half-Angle
Rise time / Fall time
Optical over shoot
Optical pulse width
Edge jitter
Irradiance in angular
INPUT Half-Angular
Maximum Emitting Time
RPM872-H7
Photo Link Module
Rev.B
5/6
Timing chart
more than 48
s
approximately 48
s
less than 2.3
s
more than 2.3
s
approximately 2.3
s
approximately 2.3
s
pull up to VIO at
approximately 300k
(Emitting side)
(Detecting side)
TXD
(7pin)
Internal LED
(Light output)
Light input
RXD
(6pin)
PWDOWN
(5pin)
less than 48
s
(emitting)
(emitting)
(emitting)
Recommended values
Part symbol
C1
Recommended value
Notice
1
F, tantalum or ceramic
Ex.) TCFGA1A105M8R (ROHM)
Bigger capacitance is recommended with much noise from power supply
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