Photologic® Slotted Optical Switch
OPB120A, OPB120B, OPB121A, OPB121B
OPB122A, OPB122B, OPB123A, OPB123B
OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (972) 323-2200 or (800) 341-4747 FAX: (972) 323-2396 sensors@optekinc.com www.optekinc.com
Issue B 08/2011
Page 1 of 5
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Features:
• Choice of output configuration
• Printed circuit board mounting
• Opaque plastic housing
• Low profile
• 0.080” (2.03 mm) wide slot
• 0.275” (6.99 mm) lead spacing
Description:
The OPB120 through OPB123 devices consist of an infrared emitting diode and a Photologic® sensor (which is a
monolithic integrated circuit that incorporates a linear amplifier and a Schmitt Trigger). The OPB120 series have
an LED and Photologic® sensor mounted on opposite sides of a 0.080” (2.03 mm) wide gap of an opaque
housing. The OPB12_A series have a molded 0.040” (1.02 mm) wide apertures located over both the emitter and
the Photologic® sensor. The OPB12_B seriesseries have a molded 0.040” (1.016 mm) wide apertures located
over the emitter and 0.010” (0.254 mm) over the Photologic® sensor. All devices in this series have the added
stability utilizing hysteresis built into the amplification circuitry.
The electrical output can be specified as either buffered Totem-Pole (OPB 120A, OPB120B), buffered Open-
Collector (OPB121A, OPB121 B), Inverted Totem-Pole (OPB122A, OPB122B), or Inverted Open-Collector
(OPB123A, OPB123B).
Custom electrical, wire and cabling and connectors are available. Contact your local representative or OPTEK for
more information.
Product Photo Here
RoHS
Applications:
• Mechanical switch
replacement
• Speed indication
(tachometer)
• Mechanical limit
indication
• Edge sensing
• Object sensing
Ordering Information
Part
Number
Sensor
Photologic®
Aperture
Emitter/
Sensor
OPB120A 0.04" / 0.04"
OPB120B 0.04" / 0.01"
OPB121A Open-Collector 0.04" / 0.04"
OPB121B 0.04" / 0.01"
OPB122A Inverted Totem-
Pole
0.04" / 0.04"
OPB122B 0.04" / 0.01"
OPB123A Inverted Open-
Collector
0.04" / 0.04"
OPB123B 0.04" / 0.01"
Totem-Pole
Pin # Description
1 Cathode
2 Anode
3 VCC
4 Output
5 Ground
DIMENSIONS ARE IN:
INCHES
[ MILLIMETERS]
Photologic® Slotted Optical Switch
OPB120A, OPB120B, OPB121A, OPB121B
OPB122A, OPB122B, OPB123A, OPB123B
OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (972) 323-2200 or (800) 341-4747 FAX: (972) 323-2396 sensors@optekinc.com www.optekinc.com
Issue B 08/2011
Page 2 of 5
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Absolute Maximum Ratings (TA = 25°C unless otherwise noted)
Supply Voltage (not to exceed 3 seconds) 10 V
Storage Temperature -40° C to +85° C
Operating Temperature -40° C to +70° C
Lead Soldering Temperature (1/16” (1.6 mm) from case for 5 seconds with soldering iron)(1) 260° C
Input Infrared Diode
Input Diode Power Dissipation(2) 100 mW
Output Photologic® Power Dissipation(4) 200 mW
Total Device Power Dissipation(5) 300 mW
Output Photologic®
Voltage at Output Lead (Open Collector Output - OPB121, OPB122, OPB123) 35 V
Forward D.C. Current 40 mA
Reverse D.C. Current 2 V
Notes:
(1) RMA flux is recommended. Duration can be extended to 10 seconds maximum when flow soldering.
(2) Derate linearly 2.22 mW/°C above 25°C
(3) Normal application would be with light source blocked, simulated by IF = 0.
(4) Derate linearly 4.44 mW/°C above 25°C
(5) Derate linearly 6.66 mW/°C above 25°C
(6) Applies to Totem Pole configurations (OPB120A, OPB120B) only.
(7) All parameters tested using pulse technique.
VCC
OUT
OPB120 Buffered Totem-Pole OPB121 Buffered Open-Collector
GND
VCC
OUT
GND
VCC
OUT
GND
VCC
OUT
GND
OPB122 Inverted Totem-Pole OPB123 Inverted Open-Collector
Photologic® Slotted Optical Switch
OPB120A, OPB120B, OPB121A, OPB121B
OPB122A, OPB122B, OPB123A, OPB123B
OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (972) 323-2200 or (800) 341-4747 FAX: (972) 323-2396 sensors@optekinc.com www.optekinc.com
Issue B 08/2011
Page 3 of 5
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Notes:
(1) Normal application would be with light source blocked, simulated by IF = 00.
Electrical Characteristics (TA = 40°C to + 70° unless otherwise noted)
SYMBOL PARAMETER MIN TYP MAX UNITS TEST CONDITIONS
Input Diode (see OP240 for additional information)
VF Forward Voltage - - 1.7 V IF = 20 mA, TA = 25° C
IR Reverse Current - - 100 µA VR = 2 V, TA = 25° C
Output Photologic® Sensor (see OPL560 for additional information)
VCC Operating D.C. Supply Voltage 4.75 - 5.25 V
ICCL
Low Level Supply Current:
Buffered Totem-Pole Output
Buffered Open-Collector Output
- - 15 mA VCC = 5.25 V, IF = 0 mA(1)
Inverted Totem-Pole Output
Inverted Open-Collector Output - - 15 mA VCC = 5.25 V, IF = 20 mA
ICCH
High Level Supply Current:
Buffered Totem-Pole Output
Buffered Open-Collector Output
- - 15 mA VCC = 5.25 V, IF = 20 mA
Inverted Totem-Pole Output
Inverted Open-Collector Output - - 15 mA VCC = 5.25 V, IF = 0 mA(1)
VOL
Low Level Output Voltage:
Buffered Totem-Pole Output
Buffered Open-Collector Output
- - 0.4 V VCC = 4.75 V, IOL = 12.8 mA, IF = 0 mA(1)
Inverted Totem-Pole Output
Inverted Open-Collector Output - - 0.4 V VCC = 4.75 V, IOL = 12.8 mA, IF = 20 mA
VOH
High Level Output Voltage:
Buffered Totem-Pole Output 2.4 - - V VCC = 4.75 V, IOH = -800 µA, IF = 20 mA
Inverted Totem-Pole Output 2.4 - - V VCC = 4.75 V, IOH = -800 µA, IF = 0 mA(1)
IOH
High Level Output Voltage:
Buffered Open-Collector Output - - 100 µA
VCC = 4.75 V, VOH = 30 V, IF = 25 mA,
TA = 25° C
Inverted Open-Collector Output - - 100 µA VCC = 4.75 V, VOH = 30 V, IF = 0 mA,
TA = 25° C
IF(+) LED Positive-Going Threshold Current - - 15 mA VCC = 5 V, TA = 25° C
IF(+)/IF(-) Hysteresis - 2 - - VCC = 5 V
IOS
Short Circuit Output Current:
Buffered Totem-Pole Output -20 - -100 mA
VCC = 5.25 V, IF = 20 mA(2)
Output = GND
Inverted Totem-Pole Output -20 - -100 mA VCC = 5.25 V, IF = 0 mA(2)
Output = GND
tr, tf Output Rise Time, Output Fall Time - 70 - ns
tPLH, tPHL Propagation Delay Low-High & High-Low - 5 - µs
VCC = 5 V, TA = 25° C
IF = 0 or 20 mA
RL = 8 TTL Loads (Totem-Pole)
RL = 360 Ω (Open-Collector)
Photologic® Slotted Optical Switch
OPB120A, OPB120B, OPB121A, OPB121B
OPB122A, OPB122B, OPB123A, OPB123B
OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (972) 323-2200 or (800) 341-4747 FAX: (972) 323-2396 sensors@optekinc.com www.optekinc.com
Issue B 08/2011
Page 4 of 5
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
OPB120A - Flag in Middle of Slot
0.00
0.20
0.40
0.60
0.80
1.00
1.20
0.00 0.05 0.10 0.15 0.20 0.25
Displacement Distance (inches)
Logic
Top to Bottom
Top to Bottom Back
Right to Left
Right to Left Back
Left to Right Left to Right Back
OPB120A - Flag Next to Sensor
0.00
0.20
0.40
0.60
0.80
1.00
1.20
0.00 0.05 0.10 0.15 0.20 0.25
Displacement Distance (inches)
Logic
Top to Bottom
Top to Bottom Back
Right to Left
Right to Left Back
Left to Right Left to Right Back
OPB120A - Flag Next to Emitter
0.00
0.20
0.40
0.60
0.80
1.00
1.20
0.00 0.05 0.10 0.15 0.20 0.25
Displace me nt Dis tance (inches)
Logic
Top to Bottom
Top to Bottom Back
Right to Left
Right to Left Back
Left to Right Left to Right Back
Photologic® Slotted Optical Switch
OPB120A, OPB120B, OPB121A, OPB121B
OPB122A, OPB122B, OPB123A, OPB123B
OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (972) 323-2200 or (800) 341-4747 FAX: (972) 323-2396 sensors@optekinc.com www.optekinc.com
Issue B 08/2011
Page 5 of 5
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
OPB120B - Flag Next to Emitter
0.00
0.20
0.40
0.60
0.80
1.00
1.20
0.00 0.05 0.10 0.15 0.20 0.25
Displacemen t Distance (inches)
Logic
Top to Bottom
Top to Bottom Back
Right to Left
Right to Left Back
Left to Right Left to Right Back
OPB120 B - Flag Next to Sensor
0.00
0.20
0.40
0.60
0.80
1.00
1.20
0.00 0.05 0.10 0.15 0.20 0.25
Displacement Distance (inches)
Logic Leve l
Left to Right Left to Right Back
Right to Left
Right to Left Back
Top to Bottom
Top to Bottom Back
OPB120B - Flag in Middle of Slot
0.00
0.20
0.40
0.60
0.80
1.00
1.20
0.00 0.05 0.10 0.15 0.20 0.25
Displacement Distance (inches)
Logic
Top to Bottom
Top to Bottom Back
Ri ght t o Lef t
Right to Left Back
Lef t t o Rig ht Left to Right Back
