Fea tures
Phototransistor output
Mechanical switch replacement
Printed circuit board mounting
Enhanced signal to noise ratio
Lever force options
De scrip tion
The OPB680 consists of an NPN
phototransistor and an infrared emitting
diode in a molded plastic housing. The
phototransistor has an enhanced low
current roll-off which improves contrast
ratio and immunity to background
irradiance. A lever arm actuated flag
interrupts the light beam, switching the
output between states that can readily
drive logic gates. The lever can be
actuated by a passing paper sheet
without damaging the paper edge.
The OPB680-20 has the same features
as the OPB680 with an increased lever
operating force. This feature prevents
false triggering due to incidental contact
in door sensing and other heavy duty
applications.
Customized lever arms and additional
spring torques can be designed for
specific applications.
Ab so lute Maxi mum Rat ings (T
A
= 25
o
C un less oth er wise noted)
Stor age and Op er at ing Tem pera ture . . . . . . . . . . . . . . . . . . . . . . . . -40
o
C to +100
o
C
Lead Sol der ing Tem pera ture [1/16 inch (1.6 mm) from case for 5 sec. with sol der ing
iron] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260
o
C
In put Di ode:
For ward DC Cur rent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA
Peak For ward Cur rent (1
s pulse width, 300 pps) . . . . . . . . . . . . . . . . . . . . . . . 3.0 A
Re verse DC Volt age. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0 V
Power Dis si pa tion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 mW
(2)
Out put Pho to tran sis tor:
Collector- Emitter Volt age. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 V
Emit ter Re verse Cur rent. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 mA
Col lec tor DC Cur rent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA
Power Dis si pa tion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 mW
(3)
Notes:
(1) RMA flux is recommended. Duration can be extended to 10 sec. max. when flow soldering.
Max. 20 grams force may be applied to leads when soldering.
(2) Derate linearly 1.33 mW/
o
C above 25
o
C.
(3) Derate linearly 2.0 mW/
o
C above 25
o
C.
(4) "On" condition exists when the lever arm is in the rest position (16
o
from vertical) as shown in
the figure.
(5) "Off" condition exists when the lever arm is deflected clockwise 8
o
3
o
from the rest position
(16
o
from vertical) as shown in the figure. Maximum allowable deflection is 35
o
from the rest
position.
Prod uct Bul le tin OPB680
April 1998
Slotted Optical Flag Switch
Types OPB680, OPB680-20
Op tek Tech nol ogy, Inc. 1215 W. Crosby Road Car roll ton, Texas 75006 (972)323- 2200 Fax (972)323- 2396
23
Types OPB680, OPB680-20
Op tek re serves the right to make changes at any time in or der to im prove de sign and to sup ply the best prod uct pos si ble.
Op tek Tech nol ogy, Inc. 1215 W. Crosby Road Car roll ton, Texas 75006 (972)323- 2200 Fax (972)323- 2396
Elec tri cal Char ac ter is tics (T
A
= 25
o
C un less oth er wise noted)
SYM BOL
PA RAME TER
MIN MAX UNITS
TEST CON DI TIONS
In put Di ode:
V
F
Forward Voltage
1.60
V
I
F
= 10 mA
I
R
Reverse Current
100
A
V
R
= 3.0 mA
Out put Pho to tran sis tor:
V
(BR)CEO
Collector-Emitter Breakdown Voltage
30
V
I
C
= 100
A
I
ECO
Emitter Reverse Current
100
A
V
EC
= 0.4 V
I
CEO
Collector-Emitter Dark Current
100
A
V
CE
= 5 V
Cou pled:
V
SAT
Saturation Voltage
0.40
V
I
F
= 10 mA, I
C
= 100
A
I
C(ON)
On-State Collector Current
600
A
I
F
= 10 mA, V
CE
= 5 V
Me chani cal:
F
OP
Operating Force
OPB680
1.5
g
Measured at end of lever
OPB680-20
20
g
Measured at end of lever
Cycles
Operating Cycles
100 K
Cycles
I
F
- Forward Current - mA
Forward Current vs. Forward
Voltage Input Diode
Collector Dark Current vs. Ambient
Temperature
T
A
- Ambient Temperature -
o
C
Normalized Output Current vs.
Ambient Temperature
T
A
- Ambient Temperature -
o
C
Rise and Fall Time vs. Load
Resistance
R
L
- Load Resistance -
Normalized Output Current
vs. Forward Current
I
F
- Forward Current - mA
I
F
@ 500 mS pulse width
V
CE
= 5 V
I
F
= 0 mA
V
CE
= 5 V
I
F
= 10 mA
Normalized to
T
A
= 25
o
C
I
F
= 10 mA (50% Duty Cycle)
V
CC
= 5 V
V
CE
= 5 V
Normalized to
I
F
= 10 mA
Normalized Forward Voltage vs.
Ambient Temperature
T
A
- Ambient Temperature -
o
C
V
CE
= 5 V
I
F
= 10 mA
Normalized to
T
A
= 25
o
C
t
r
t
f
24
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