Document
RPM872-H7
Photo Link Module
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.
zFeatures 1) Applied to IrDA Ver. 1.2. (Low Power) 2) Designed for low power consumption at waiting mode (75µA). 3) Low operating voltage VCC=2.0V to 3.6V VIO=1.5V to 3.6V VLED=2.6V to 5.5V 4) Small package. 5) Power down function.
zApplications Cellular phones, PDA, Digital still camera, Handy terminals, and other portable equipments.
zAbsolute maximum ratings (Ta=25°C)
Parameter
Supply voltage Power dissipation Operating temperature Storage temperature
Symbol VCC Pd Topr Tstg
Limits 7.0 100 −20 to +85 −30 to +100
Unit V mW ˚C ˚C
zRecommended operating conditions (Ta=25°C)
Parameter
Supply voltage
Symbol VCC VLEDA VIO
Min. 2.0 2.6 1.5
Typ. 3.0 3.0 3.0
Max. 3.6 5.5 VCC
Unit V V V
Rev.B
1/6
RPM872-H7
Photo Link Module
zBlock diagram and application circuit
AMP
GND
1
VIO
VIO
AMP
2
VCC
VCC
AMP
3
GND
GND C1
4
POWER DOWN
PWDOWN
PWDOWN
5
RXD
RXD
6 7
TXD TXD
LEDA
(LEDVCC)
8
VCC(3pin) and VLEDA(8pin) can be used on either common power source or different one.
Rev.B
2/6
RPM872-H7
Photo Link Module
zTerminal description
Pin No 1, 4
Terminal
GND
Circuit
Function
GND Pin1 and Pin4 must be connected to the ground. VIO Supply voltage for I/O pins (PWDOWN, RXD, TXD)
2
VIO
3
VCC
VCC Supply voltage for Transceiver circuits. For preventing from infection, connect a capacitor between VCC(3pin) and GND(4pin).
VIO Power-down Control Terminal H : POWERDOWN MODE L : OPERATING MODE CMOS logic level input When input is H, it will stop the receiving circuit, Pin-PD current and transmitting LED operation.
5
PWDOWN
VIO PWDOWN 6 300k RXD VIO
Receiving Data Output Terminal CMOS logic level output When PWDOWN (5pin) = H, the RXD output will be pulled up to VIO at approximately 300kΩ.
VIO
Transmitting Data Input Terminal
7 TXD 600k
H : LED (PWDOWN = L) CMOS logic level input Holding TXD = "H"status, LED will be turn off approximately 48µs.
LED ANODE Terminal
LED
8
LEDA
Other power source can be used difference between LEDVCC and VCC. This can be connected to battery kinds of unregulated voltage source by internal constant current driver.
−
Shield Case
Connect to Ground.
Rev.B
3/6
RPM872-H7
Photo Link Module
zElectrical characteristics (Unless otherwise noted, VCC=3V, VLEDA=3V, VIO=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 ICC1 ICC2
Min. − − 2.4 2/3∗VIO 1.2 0 −1.0 −1.0
Typ. 75 0.01 − − − 0 0
Max. 99 0.2 115.2
VIO
Unit µA µA kbps V
Conditions VPWDOWN = 0V. At no input light VPWDOWN = VIO. At no input light
VPDH
VIO = 1.8 to 3.6 [V] VIO = 1.5 to 1.8 [V]
VPDL IPDH IPDL
1/3∗VIO VIO−1.2 1.0 1.0
V µA µA
VIO = 1.8 to 3.6 [V] VIO = 1.5 to 1.8 [V] PWDOWN = VIO [V] PWDOWN = 0 [V]
TXD INPUT High Voltage
VTXH
2/3∗VIO 1.2
− − 5 0 30.5
VIO 1/3∗VIO VIO−1.2 10 1.0 −
V
VIO = 1.8 to 3.6 [V] VIO = 1.5 to 1.8 [V]
TXD INPUT Low Voltage TXD INPUT High Current TXD INPUT Low Current LED ANODE Current
VTXL ITXH ITXL ILEDA
0 2.5 −1.0 − VIO−0.4 0 − − 1.5 −
V µA µA mA
VIO = 1.8 to 3.6 [V] VIO = 1.5 to 1.8 [V] TXD = VIO [V] TXD = 0 [V]
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
− − 35 35 2.3 100
VIO 0.4 − − 4.2 200
V V ns ns µs µs
IRXH = −200µA IRXL = 200µA CL = 15pF CL = 15pF CL = 15pF, 2.4 to 115.2kbps
zOptical characteristics (Unless otherwise noted, VCC=3V, VLEDA=3V, VIO=3V, Ta=25°C)
Parameter
Peak wave length Intensity 1 Half-Angle Optical pulse width Rise time / Fall time Optical over shoot Edge jitter Irradiance in angular INPUT Half-Angular Maximum Emitting Time
Symbol λP IE1 θL / 2 TWLED Tr / Tf
Min. 850 4.0 − 1.42 −
− −40 0.0068 ±15 16
Typ. 870 10 ±18 1.63 −
− − − − 48
Max. 900 26 ±30 2.02 100
25 40 500 − 120
Unit nm mW / Sr deg µs ns
% ns
Conditions −15˚ ≤ θL ≤ 15˚ TXD=1.63µs pulse input 10% to 90%
Tj Ee θD / 2 TLEDmax
mW / cm2 −15˚ ≤ θL ≤ 15˚ deg µs TXD=VIO
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.
Rev.B
4/6
RPM872-H7
Photo Link Module
zTiming chart
(Emitting side) TXD (7pin)
less than 48 µs (emitting)
more than 48 µs (emitting) (emitting)
Internal LED (Light output)
approximately 48 µs (Detecting side)
Light input less than 2.3 µs more than 2.3 µs
RXD (6pin) pull up to VIO at approximately 300kΩ
approximately 2.3 µs
ap.