Infrared Components
Ceramic Discrete Surface Mount Emitters and
Detectors
SME/SMD Series
Honeywell Sensing and Control
FEATURES
Small package size
Glass lensed optics for
efficient optical coupling
Upright or inverted mounting
capability
Low profile, small size for
flexible layout of multiple
channels and custom arrays
Compatible with automated
solder processes:
- IR reflow
- vapor phase
- solder wave
- convection oven
Choice of photodiode or
phototransistor detectors
IRED features high power
dissipation capability
Tape and reel packaging
option pick and place
machine compatible
APPLICATIONS
Optical encoders for motion
control
Computer peripherals
Vending and point-of-sale
applications
Smoke detectors
Medical equipment
The SME2470, SMD2440 and SMD2420 Series surface mount
infrared components are small ceramic packages (0.15 x 0.10 x
0.083 in. / 3,81 x 2,54 x 2,1 mm) with glass lenses. The lens minimizes
cross talk and often eliminates the need for apertures in non-critical
applications. The low profile components may be mounted on the
printed circuit board, lens up or inverted, allowing flexibility in layouts for
multiple channel and custom arrays. When mounted lens down over a
hole in the PC board, the lens is hidden, lowering overall package
height.
The SME2470 is a high intensity aluminum gallium arsenide infrared
emitting diode (IRED) which can be used with either the SMD2440
phototransistor or the SMD2420 photodiode. It supplies optimum optical
characteristics and efficient optical coupling. The small size and high
power dissipation properties of the IRED promote PC board
miniaturization and high density placement.
The SMD2440 Series phototransistor’s gain characteristics make it
useful for applications requiring high responsivity. The SMD2420 Series
photodiode is especially useful in applications requiring linear response
or high switching speed.
These components are available in bulk, or on tape and reel for use
with automatic placement equipment.
Infrared Components
Ceramic Discrete Surface Mount
SME/SMD Series
2 Honeywell Sensing and Control For application help: call 1-800-537-6945
SME2470 SERIES IRED ABSOLUTE MAXIMUM RATINGS
Power dissipation @ 25 °C* 150 mW
Continuous forward current 75 mA (mounted on a PC board)
Reverse voltage (IF = 10 µA) 3 V
Operating free air temperature range -55° to +125°C (-67° to +257°F)
Storage temperature -65° to +150°C (-85° to +302°F)
Soldering temperature 260°C (500°F), 5 seconds max.
*Derate 1.43 mW/°C above 25°C ambient.
CAUTION
STRESS DAMAGE
Functional operation of the device at
or above “Absolute Maximum Ratings
for extended periods of time may
affect reliability.
Failure to comply with these
instructions may result in product
damage.
SME2470 SERIES IRED ELECTRICAL CHARACTERISTICS (at 25°C unless otherwise noted)
Parameter Test Conditions Sym. Min. Typ. Max. Units
Irradiance Measured into 0.104 in. (2.64 mm) dia.
aperture @ 0.535 in. (13.59 mm) from
lens tip. IF = 50 mA
H 0.6 mW/cm2
Forward voltage IF = 50 mA VF1.5 1.8 Volts
Reverse breakdown voltage IR= 10 µA BVR3.0 Volts
Peak output wavelength IF = 50 mA λ880 nm
Spectral bandwidth IF = 50 mA 80 nm
Rise time
Fall time 10 µsec pulse width tR
tF
800
700 ns
ns
TYPICAL IRED PERFORMANCE CHARACTERISTICS
SME2470 Spectral Bandwidth
100%
80%
60%
40%
20%
0%760 800 840 880 920 960 1000
Wavelength - nm
Rela ti ve Irrad iance
SME2470 Irradiance vs Angular Displacement
100%
80%
60%
40%
20%
0%-30 -20 -10 0 10 20 30
Angular Displacement - Degrees
Relative Irradiance
Infrared Components
Ceramic Discrete Surface Mount
SME/SMD Series
For application help: call 1-800-537-6945 Honeywell Sensing and Control 3
TYPICAL IRED PERFORMANCE CHARACTERISTICS (when solder mounted to PC board)
SME2470 Forward Current vs Forward Voltage
1.5
1.4
1.3
1.2
020406080100
Forward Current - mA
Forward Voltage - V
1.6
1.1
1.0
SME2470 Forward Voltage vs Temperature
1.50
1.45
1.40
1.35
-55 -10 35 80 125
Temperature - C
Forward Voltage - V
1.55
1.30
SME2470 Irradiance vs Temperature
160%
120%
80%
40%
-55 -10 35 80 125
Temperat ure - C
Normalized Irradiance
200%
0%
SME2470 Irradiance vs Forward Current
100%
80%
60%
40%
20%
0% 01020304050 70
Forward Current - mA
Relative Ir r adiance
60
Infrared Components
Ceramic Discrete Surface Mount
SME/SMD Series
4 Honeywell Sensing and Control For application help: call 1-800-537-6945
SMD2440 SERIES PHOTOTRANSISTOR ABSOLUTE MAXIMUM
RATINGS
Collector-Emitter voltage 30 V
Emitter-Collector voltage 5 V
Continuous device dissipation* 125 mW
Operating free air range -55° to +125°C (-67° to +257°F)
Storage temperature -65° to +150°C (-85° to +302°F)
Soldering temperature 260°C (500°F), 5 seconds max.
*Derate 1.43 mW/°C above 25°C ambient.
SMD2440 SERIES PHOTOTRANSISTOR ELECTRICAL CHARACTERISTICS
Parameter Test Conditions Sym. Min. Typ. Max. Units
Light current -0X1
-0X2 VCE = 5 V, H = 1 mW/cm2,
880 nm light source IL1.5
3.0 4.0
8.0 mA
mA
Dark current VCE = 10 V, H = 0 ID100 nA
Collector breakdown voltage IC = 100 µA, H = 0 BVCEO 30 Volts
Emitter breakdown voltage IE = 100 µA, H = 0 BVECO 5 Volts
Saturation voltage (C to E) IC = 0.04 mA, H = 1 mW/cm2VCE(SAT) 0.2 0.4 Volts
Peak response wavelength λ880 nm
Rise time VCC = 5 V, RL = 1000 , IL = 1 mA tR 15 µs
Fall time tF 15 µs
SMD2420 SERIES PHOTODIODE ABSOLUTE MAXIMUM
RATINGS
Cathode-Anode voltage 50 V
Continuous device dissipation* 125 mW
Operating free air range -55° to +125°C (-67° to +257°F)
Storage temperature -65° to +150°C (-85° to +302°F)
Soldering temperature 260°C (500°F), 5 seconds max.
*Derate 1.43 mW/°C above 25°C ambient.
SMD2420 SERIES PHOTODIODE ELECTRICAL CHARACTERISTICS
Parameter Test Conditions Sym. Min. Typ. Max. Units
Light current VR = 20 V, H = 1 mW/cm2*I
LA
Dark current VR = 20 v, h = 0 ID5nA
Reverse breakdown voltage IR = 10 µA, H = 0 BVR50 Volts
Peak response wavelength λ880 nm
Rise time VR = 20 V, RL 100 , IL = 10 µA tR20 ns
Fall time tF20 ns
*From 880 nm source
Infrared Components
Ceramic Discrete Surface Mount
SME/SMD Series
For application help: call 1-800-537-6945 Honeywell Sensing and Control 5
TYPICAL SMD2440 AND SMD2420 SERIES PERFORMANCE CHARACTERISTICS (when solder
mounted to PC board)
SMD2440 and SMD2420 Spectral Responsivity
100%
80%
60%
40%
20%
0%
400 500 600 700 800 900
Wavelength - nm
Relative Response
1000 1100 1200
SMD2440 and SMD2420 Responsivity vs Angular
Displacement
100%
80%
60%
40%
20%
0% -30 -20 -10 0 10 20 30
Angular Displacement - Degrees
Relative Irradiance
-40 40
SMD2440 Dark Current vs Temperature
10000
100
10
1
-40 -20 40 60 120 140
Dark Current - nA
100000
0.01
0.001
Temperature - C
1000
0.1
0 20 80 100
VCE = 15 V
H = 0 V
SMD2420 Dark Current vs Temperature
10
1.0
0.1
0.01
-55 -10 35 80 125
Dark Current - nA
100
0.001
Temperature - C
SMD2440 Collector Current vs Ambient
Temperature
1.4
1.2
1.0
0.8
020406080
Normalized Collector Current
1.6
0.6
Ambient Temperature - C
SMD2440 Non-saturated Switching Time vs Load
Resistance
10
10 100 1000 10000
Load Resistance - Ohms
Response Time - uS
100
1
Infrared Components
Ceramic Discrete Surface Mount
SME/SMD Series
6 Honeywell Sensing and Control For application help: call 1-800-537-6945
TYPICAL SMD2440 AND SMD2420 SERIES PERFORMANCE CHARACTERISTICS (when solder
mounted to PC board)
SME to SMD Coupling Characteristics
100%
80%
60%
40%
20%
0% 00.1 0.2 0.3 0.4 0.5 0.6
Lens-to Lens Separation - inches
Normalized Light Current
SMD2440 Switching Time Test Circuit
250 uS
GaAs Emitter Collector
Emitter
+
-
RL
1000
e
0
Vcc +5 V
SMD2440 Switching Waveform
e
0
1.0 V 90%
10%
0 V ttr
tr
SMD2420 Switching Time Test Circuit
10 uS
GaAs Emitter Cathode
Anode
+
-
RL
50
e
0
V
R
+20 V
SMD2420 Switching Waveform
e
0
100% 90%
10%
0% ttr
tr
Infrared Components
Ceramic Discrete Surface Mount
SME/SMD Series
For application help: call 1-800-537-6945 Honeywell Sensing and Control 7
SME2470, SMD2440, SMD2420 OUTLINE DIMENSIONS in./(mm) (for reference only)
View A-A
A
A
Ø 0.068 (1,7)
0.100 (2,5)
0.150 (3,8)
0.70
(1,8)
0.030 (0,8)
0.083
(2,1)
0.040 (1,0)
Anode (SME2470)
0.015 (0,4)
Anode
Cathode
Anode
Cathode Emitter
Collector
SME
SMD
Collector (SMD2440)
Cathode (SMD2420)
Cathode (SME2470)
Emitter (SMD2440)
Anode (SMD2420)
TAPE AND REEL MOUNTING CONFIGURATIONS: EIA STD 12 mm tape and reel with a 4 mm pitch in.(mm)
0.157
0.113
0.056
0.165
0.083 (2,11)
Ø 0.062
0.069 (1,75)
0.106
+.010
0.157
-.000
VIEW WITH SMD INSTALLED INVERTED
- SQUAR E END TOWARD HOLES
- ROUND END TOWARD EDGE
0.069 (1,75)
0.472 AA
0.157
0.079 ±.002
0.157 (3,99) SECTION
0.113
0.085 (2,16)
A-A
- RECTANGULAR METALIZED EN D TOWARDS HOLES
- RADIUSED METALIZED END TOWARD EDGE
VIEW WITH SMD INSTALLED UPRIGHT
(2,87)
(3,99)
(1,42)
(2,88)
(4,19)
(3,99)
(2,69)
0.048 (1,22)
+.012
-.004
(2,01 ±,050)
(11,98
+,30
-,10
0.217 ±.002
(5,51 ±,05)
0.165 (4,19)
0.010 ±.004
(0,254 ±,15)
0.095
0.79 ±.002
(2,01 ±,05)
0.217 ±.002
(5,51 ±,05)
(10,13)
Ø 0.062 (10,13
+,25
-,00
0.010 ±.004
(0,25 ±,10)
0.472
+.012
-.004
(11,99
+,30
-,10
(1,57)
Ø 0.062
)
)
(2,41)
)
(3,98)
Infrared Components
Ceramic Discrete Surface Mount
SME/SMD Series
HONEYWELL
Sensing and Control
Honeywell Inc.
11 West Spring Street
Freeport, Illinois 61032
Printed with Soy Ink
on 50% Recycled Paper
www.honeywell.com/sensing
006445-2-EN IL50 GLO 199 Printed in USA
ORDER GUIDE
Catalog Listing Description
SME2470-001 Bulk Packaged, Surface Mount IR Emitter
SMD2420-001 Bulk Packaged, Surface Mount Photodiode
SMD2440-001 Bulk Packaged, Surface Mount Phototransistor
SMD2440-002 Bulk Packaged, Surface Mount Phototransistor
SME2470-011 Tape and Reel, Inverted, Surface Mount IR Emitter
SMD2420-011 Tape and Reel, Inverted, Surface Mount Photodiode
SMD2440-011 Tape and Reel, Inverted, Surface Mount Phototransistor
SMD2440-012 Tape and Reel, Inverted, Surface Mount Phototransistor
SME2470-021 Tape and Reel Upright, Surface Mount IR Emitter
SMD2420-021 Tape and Reel, Upright, Surface Mount Photodiode
SMD2440-021 Tape and Reel, Upright, Surface Mount Phototransistor
SMD2440-022 Tape and Reel, Upright, Surface Mount Phototransistor
WARRANTY/REMEDY
Honeywell warrants goods of its manufacture as being free of
defective material and faulty workmanship. Contact your local sales
office for warranty information. If warranted goods are returned to
Honeywell during that period of coverage, Honeywell will repair or
replace without charge those items it finds defective. The foregoing is
Buyer’s sole remedy and is in lieu of all other warranties,
expressed or implied, including those of merchantability and
fitness for a particular purpose.
While we provide application assistance, personally, through our
literature, and through the Honeywell website, it is up to the customer
to determine the suitability of the product in the application.
Specifications may change at any time without notice. The
information we supply is believed to be accurate and reliable as of
this printing. However, we assume no responsibility for its use.
SALES AND SERVICE
Sensing and Control serves its
customers through a worldwide
network of sales offices and
distributors. For application
assistance, current specifications,
pricing or name of the nearest
Authorized Distributor, contact a
nearby sales office or call:
TELEPHONE
1-800-537-6945 (USA)
1-800-737-3360 (Canada)
1-815-235-6847 (International)
FAX
1-815-235-6545 (USA)
INTERNET
www.honeywell.com/sensing
info@micro.honeywell.com