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 C 11/2010
Page 1 of 3
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Photologic® Optically Coupled Isolator
OPI125, OPI126, OPI127, OPI127-032, OPI128
Applications:
• High voltage isolation between
input and output
• Electrical isolation in dirty
environments
• Industrial equipment
• Medical equipment
• Office equipment
Description:
Each OPI125, OPI126, OPI127, OPI127-032 and OPI128 consists of an optically coupled isolator with a gallium
arsenide infrared emitting diode coupled to a monolithic integrated circuit. This circuit incorporates a photodiode, a
linear amplifier and a Schmitt trigger on a single silicon chip. For maximum long-term stability, both the diode and
the Photologic® sensor are hermetically sealed in separate packages and then mounted in a high dielectric plastic
housing.
These devices feature TTL/LSTTL compatible logic level output that can drive up to 8 TTL loads directly without
additional circuitry. Also featured are medium-speed data rates to 250 KBit/s, with typical rise and fall times of 70
nanoseconds. *UL recognition is for 15KVDC to 100° C.
TX and TXV processing is available. For more information, contact your local representative or OPTEK.
Features:
• Four output options
• 15 kV input-to-output isolation
voltage
• Direct TTL/STTL interface
• High noise immunity
Product Photo Here
RoHS
Ordering Information
Part
Number
LED Peak
Wavelength
Sensor
Photologic®
Isolation
Voltage
(,000)
tPLH / tPHL
Typ (µs)
IF (mA)
Typ / Max
VCE
(Volts)
Max
Lead
Length /
Spacing *Length
OPI125
890 nm
or
935 nm
Totem Pole
15 5 / 5 7.5 / 25 35.0 0.40" /
0.75"
0.75”
[19mm]
OPI126 Open Collector
OPI127 Inverted Totem
Pole
OPI127-
032 Inverted Totem
Pole
1.26”
[32mm]
OPI128 Inverted Open
Collector
0.75”
[19mm]
• Data rates to 250 KBit/s
• Hermetically sealed
• TX-TXV process available
• UL File No. E 58730*
* See
Table
Pin # LED Pin # Photologic®
1 Anode 3 Output
2 Cathode 4 Vcc
5 Ground
INCHES
[MILLIMETERS]
DIMENSIONS ARE IN:
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 C 11/2010
Page 2 of 3
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Photologic® Optically Coupled Isolator
OPI125, OPI126, OPI127, OPI127-032, OPI128
Absolute Maximum Ratings (TA = 25o C unless otherwise noted)
Storage Temperature -55° C to +100° C
Operating Temperature -55° C to +100° C
Input-to-Output Isolation Voltage(1)(2) ± 15 kVDC
Lead Soldering Temperature (1/16” (1.6 mm) from case for 5 seconds with soldering iron)(3) 260° C
Input Diode
Forward DC Current 25 mA
Reverse DC Voltage 2 V
Power Dissipation(4) 200 mW
Output Photosensor
Output Photologic® Power Dissipation(5) 120 mW/° C
Duration of Output Short to VCC or Ground (OPI125, OPI127) 1.00 second
Duration of Output Short to VCC (OPI126, OPI128) 1.00 second
Voltage at Output Lead (OPI126, OPI128) 35 V
Supply Voltage, VCC (not to exceed 3 seconds) +10 V
Notes:
(1) Measured with input and output leads shorted.
(2) UL recognition is for 3750 VAC to 100° C.
(3) RMA flux is recommended. Duration can be extended to 10 seconds maximum when flow soldering.
(4) Derate linearly 1.33 mW/° C above 25° C.
(5) Derate linearly 3.40 mW/° C above 25° C.
OPI125 - Totem Pole Output OPI126 - Open Collector Output
OPI128 - Inverted Open Collector Output
OPI127 - Inverted Totem Pole Output
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 C 11/2010
Page 3 of 3
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Photologic® Optically Coupled Isolator
OPI125, OPI126, OPI127, OPI127-032, OPI128
Electrical Characteristics (TA = -40o C to +85° C unless otherwise noted)
SYMBOL PARAMETER MIN TYP MAX UNITS TEST CONDITIONS
Diode Input (See OP130 and OP230 for additional information - for reference only)
VF Forward Voltage - - 1.5 V IF = 10 mA, TA = 25° C
IR Reverse Current - - 100 µA VR = 2 V, TA = 25° C
IF(+) LED Positive-Going threshold Current - - 7.5 mA VCC = 5 V, TA = 25° C
IF(+)/IF(-) Hysteresis Ratio - 2.0 - - -
Photologic® Output (See OP800 and OP801 for additional information - for reference only)
VCC Operating Supply Voltage 45 - 5.5 V -
ICC Supply Current - - 20 mA VCC = 5.5 V, IF = 0 or 7.5 mA
VOL
Low Level Output Voltage
OPI125
OPI126
OPI127
OPI128
-
-
-
-
-
-
-
-
0.40
0.40
0.40
0.40
V
VCC = 4.5 V, IOL = 13 mA, IF = 0 mA
VCC = 4.5 V, IOL = 13 mA, IF = 0 mA
VCC = 4.5 V, IOL = 13 mA, IF = 7.5 mA
VCC = 4.5 V, IOL = 13 mA, IF = 7.5 mA
VOH
High Level Output Voltage
OPI125
OPI127
2.4
2.4
-
-
-
- V
VCC = 4.5 V, IOH = -800 µA, IF = 7.5 mA
VCC = 4.5 V, IOH = -800 µA, IF = 0 mA
IOS
Short Circuit Output Current
OPI125
OPI127
-20
-20
-
-
-120
-120
mA
VCC = 5.5 V, IF = 7.5mA, Output = GND
VCC = 5.5 V, IF = 0 mA, Output = GND
IOH
High Level Output Current
OPI126
OPI128
-
-
-
-
100
100
µA VCC = 4.5 V, VOH = 30 V, IF = 7.5 mA
VCC = 4.5 V, VOH = 30 V, IF = 0 mA
tr, tf
Output Rise Time, Output Fall Time
OPI125, OPI127 - 100 -
ns
VCC = 5 V, TA = 25° C,
IF = 0 or 10 mA, f = 10 kHz,
D.C. = 50%, RL = 8 TTL loads
Output Rise Time, Output Fall Time
OPI126, OPI128 - 100 -
VCC = 5 V, TA = 25° C,
IF = 0 or 10 mA, f = 10 kHz,
D.C. = 50%, RL = 360 Ω
tPLH, tPHL
Propagation Delay, Low-High, High-Low
OPI125, OPI127 - 5 -
µs
VCC = 5 V, TA = 25° C,
IF = 0 or 10 mA, f = 10 kHz,
D.C. = 50%, RL = 8 TTL loads
Propagation Delay, Low-High, High-Low
OPI126, OPI128 - 5 -
VCC = 5 V, TA = 25° C,
IF = 0 or 10 mA, f = 10 kHz,
D.C. = 50%, RL = 360 Ω
Notes:
(1) Measured with input and output leads shorted in air with a maximum relative humidity of 50%. If suitably encapsulated or oil-
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