How it Works
Datasheet
Loading...
RPM871-H14
Datasheet (ROHM)
8 pgs97.87 Kb0

Datasheet RPM871-H14 Datasheet (ROHM)

Download
Photo Link Module

RPM871-H14

IrDA Infrared communication Module

RPM871-H14
zFeatures
1) Applied to IrDA version 1.2. (Low Power)
2) Designed for low power consumption at stand-by for receiving (Typ.73 µA).
3) Suitable for sets driven by battery due to power down control function.
4) Power supply voltage range : 2.6V to 3.6V
5) Constant LED load resistance can change communication range. (Approx. 20 to 60cm)
zApplicat ions
Cellular phones, PDAs, etc.
zAbsolute maximum ratings (Ta = 25°C)
Parameter Symbol Limits Unit
Power supply voltage V
Input voltage
Power dissipation Operating temperature range Storage temperature range LED peak current
∗1 70mm×70mm, t=1.6mm, glass epoxy mounting. Derating : 2mW/°C for operation above Ta=25°C ∗2 LED peak current<90µs. ON duty<20%
CC
Vin
Pd Topr Tstg
I
FP
7.0
−0.3 to VCC+0.3
∗1
150
−20 to +85
−30 to +100
∗2
200
zRecommended operating conditions (Ta = 25°C)
Parameter Symbol Min.
Power supply voltage
CC
V
LEDA
V
Typ. Max.
3.0
2.8
3.6
5.5
1/7
mW
mA
Unit
V2.6 V2.6
V V
°C °C
Photo Link Module
zBlock diagram and application c ircuit
AMP
GND
18765432
NC
RPM871-H14
AMP
AMP
POWER
DOWN
LED
DRIVER
VCC
GND
C1
PWDOWN
RXD
TXD
LEDA
VCC (3pin) and VLEDA (8pin) can be used on either common power source or different one.
R1
VCC
GND
PWDOWN
RXD
TXD
(LEDV
CC)
2/7
Photo Link Module
zT erminal description
Pin No
1, 4 GND
Terminal
RPM871-H14
Circuit Function
GND Pin1 and pin4 must be connected to the ground.
2NC
3
5
6
7
V
CC
PWDOWN
RXD
TXD
PWDOWN
This Terminal must be left open. V
CC
For preventing from infection, connect a capacitor between V GND (4pin).
V
CC
V
CC
V
CC
300k
V
CC
200K
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.
Receiving Data Output Terminal CMOS Logic Level Output
When PWDOWN (5pin)=H, the RXD output will be pulled up to V approximately 300kΩ.
Transmitting Data Input Terminal H : LED (PWDOWN=L) CMOS Logic Level Input
Holding TXD="H" status, LED will be turn off approximately 45µs.
CC
(3pin) and
CC
at
LED ANODE Terminal
8
−
LEDA
Shield Case
LED
Other power source can be used difference between LEDV LED current depends on LED load resistance value.
Connect to Ground.
CC
and VCC.
3/7
Photo Link Module
RPM871-H14
CC
zElectrical characteristics (Unless otherwise noted, V
Parameter Consumption current1 Consumption current2 Transmission rate PWDOWN INPUT High voltage PWDOWN INPUT Low voltage PWDOWN INPUT High current PWDOWN INPUT Low current
Symbol
I
CC1
ICC2
VPDH VPDL
IPDH IPDL
Min. Typ. Max. Unit Conditions
−
−
2.4
V
CC−0.55
−
−1.0
−1.0
=2.8V , VLEDVCC=2.8V , Ta=25°C)
73
0.01
−
−
−
0 0
99
0.2
−
0.55
1.0
1.0
Stand-by for receiving At no input light
µA
PWDOWN PIN High At no input light
µA
kbps115.2
V V
µA
PWDOWN=V
µA
PWDOWN=0 [V]
CC
[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
V
CC−0.55
−
7
−1.0
−
−
−
14
0
144
−
0.55 28
1.0
−
V V
µA µA
mA
TXD=V
CC
TXD=0 [V] R1=7.5 [Ω]
[V]
<Receiver>
IRXH=
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
CC−0.5
1.5
−
−
−
−
−
70 30
2.3
100
−
−
0.4
−
−
3.6
300
V
V ns ns
µs µs
−50µA
IRXL=200µA
L
=15pF
C
L
=15pF
C
L
=15pF, 2.4 to 115.2kbps
C
zOptical characteristics (Unless otherwise noted, V
Parameter
Peak wave length Intensity1 Half-angle
Rise time / Fall time
Symbol
λP
IE1
θL/2
Tr/Tf Optical over shoot Edge jitter Irradiance in angular INPUT Half-Angular Maximum emitting time
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.
Tj
Ee
θD/2
TLEDmax
Min. Typ. Max. Unit
850
−
−
−40
0.0068 ±15
10
CC
=2.8V , VLEDVCC=2.8V , Ta = 25°C)
870 nm
3614.4
±18
45
900
deg
ns
%25
ns40
deg
µs
−15°≤θ
R1=7.5 [Ω]
10% to 90%
2
−15°≤θ
TXD=V
mW/Sr93.6
±30 100
−
−−
−
500
−
−
mW/cm
−
96
L
≤15°
L
≤15°
CC
Conditions
4/7
Photo Link Module
(
ly
zTiming chart
Emitting side)
TXD (7pin)
less than 45µs
RPM871-H14
more than 45µs
(emitting)
Internal LED (Light output)
approximately 45µs
(Detecting side)
Light input
less than 2.3µs more than 2.3µs
RXD (6pin)
approximately 2.3µsapproximately 2.3µs
PWDOWN (5pin)
(emitting)
(emitting)
pull up to V
CC at approximately 300kΩ
zAtt ached compone nts Recommended values
Part symbol
C1
R1
Recommended value
1µF, tantalum or ceramic
Ex.) TCFGA1A105M8R (ROHM)
7.5Ω±5%, 1/4W (VLEDV
CC
=2.8V)
Notice
Bigger capacitance is recommended with much noise from power supp
2
More than 60cm distance, more than 4[µW/cm (vs ver1.0)
More than 46cm distance, more than 6.8[µW/cm (vs RPM871-H14)
] at detecting side.
2
] at detecting side.
In case of using R1 with different condition from the above, formula is as follow s : LED resistance value : R1[Ω], LED average consumption current : ILED[mA], Supply voltage : VLEDV
CC
[V],
Link distance : d[cm] (Including LED’s distribution within ±15deg)
R1=T × (VLEDV
CC
−1.45) / d2−3.5 [Ω] ILED=Duty × (VLEDVCC−1.36) / (R1+2.5) [A] Duty : LED duty at emitting
T : 17300 (vs. RPM871-H14), 29400 (vs. ver1.0)
∗ Please set up to be ILED / Duty < 200[mA] (Duty < 20%)
5/7
RPM871-H14
0
)
0
)
Photo Link Module
zNotes
CC
1) LEDV
•
2) Caution in designing board lay-out
T o get maximum potential from RPM871-H14, please keep in mind following instruction.
•
be close to photo diode side (1pin).
⇒This is to minimize feedback supplied to photo diode from RXD.
•
•
generates noise, such as DC / DC converter.
3) Others
•
(for < 90µsec. on duty < 20%).
•
•
by different signal format.
•
4) LED current derating and ambient temperature
The relation between LED peak current and maximum ambient temperature is shown below . We recommend you to use within the range as indicated in below. a) When glass-epoxy board (70×70×1.6mm) mounted.
(8pin) and VCC (3pin)
Other power source can be used difference between LEDVCC and VCC.
The line of RXD (6pin) should be connected at backside via through hole close to RPM871-H14 pin lead. Better not to
As for C1 between 3-4 pin should be placed close to RPM871-H14. Better to be placed more than 1.0cm in radius from photo diode (pin1 side) and also away from the parts w hich
Please be sure to set up the TXD (7pin) input to be “L” (under 0.55V) except transmitting data
Power down current might increase if exposed by strong light (ex. direct sunlight) at pow er down mode. Please use by the signal format which is specified by IrDA V er1.2 (2.4k to 1 15.2kbps). There might be on error if used
Dust or dirt on lens portion may affect the characteristics, so pay suf ficient attention.
250
200
Duty=10%
150
100
50
0
−200 2040608010
MAXIMUM LED PACK CURRENT : Iledp (mA
AMBIENT TEMPERATURE : Ta (°C)
Duty=20%
b) RPM871-H14
250
200
150
100
50
0
−200 2040608010
MAXIMUM LED PACK CURRENT : Iledp (mA
AMBIENT TEMPERATURE : Ta (°C)
Duty=10%
Duty=20%
6/7
Photo Link Module
zExternal dimensions (Unit : mm)
RPM871-H14
R1.1
2.2
8.0
PinPD
1.0
2.9
0.68±0.1
1.1
1.4
2.8
4.0 A
18
P0.95×7=6.65
0.6 0.48
LED
0.37±0.1
0.95
R1.0
0.15±0.1
2.67
(0.13)
2.2
0.15±0.1
0.78
2.59
0.6±0.1
NOTE
1.TOLERANCE :
2.COPLANARITY : 0.1mmMAX
UNIT : mm
0.76
A Part Size (Shield Case underside size)
ETH648
2.2
0.75
±0.2mm
7/7
Appendix
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.
Notes
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
Loading...
Buy Points How it Works FAQ Contact Us Questions and Suggestions Privacy Policy Cookie Policy Terms of Use