Fea tures
Photologic
output
Four output options
Mechanical switch replacement
Printed circuit board mounting
De scrip tion
The OPB685 series flag switches consist
of an infrared emitting diode and a
monolithic integrated circuit, which
incorporates a photodiode, a linear
amplifier and a Schmitt trigger. A lever
arm actuated flag interrupts the light
beam switching the output between
states that can readily drive logic gates.
Customized lever arms and spring
torques can be designed for specific
applications.
The device features TTL/LSTTL
compatible logic level output which can
drive up to 10 TTL loads over a voltage
range from 4.5 V to 16 V.
Ab so lute Maxi mum Rat ings (T
A
= 25
o
C un less oth er wise noted)
Stor age Tem pera ture Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40
o
C to +100
o
C
Op er at ing Tem pera ture Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . -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] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
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 tologic
Sup ply Volt age, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 V
Du ra tion of Out put Short To V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.00 sec
Volt age at Out put. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 V
Low Level Out put Cur rent (sink ing) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 mA
Power Dis si pa tion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240 mW
(3)
Notes:
(1) RMA flux is rec om mended. Du ra tion can be ex tended to 10 sec. max. when flow sol der ing.
(2) Der ate line arly 1.33 mW/
o
C above 25
o
C.
(3) Der ate line arly 2.50 mW/
o
C above 30
o
C.
Prod uct Bul le tin OPB685
July 1996
Photologic
Optical Flag Switch
Types OPB685, OPB686, OPB687, OPB688
Op tek Tech nol ogy, Inc. 1215 W. Crosby Road Car roll ton, Texas 75006 (972)323- 2200 Fax (972)323- 2396
12-56
Types OPB685, OPB686, OPB687, OPB688
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
TYP MAX UNITS
TEST CON DI TIONS
In put Di ode
V
F
Forward Voltage
1.6
V
I
F
= 10 mA
I
R
Reverse Current
100
A
V
R
= 3.0 V
Out put Pho tologic
Sen sor
V
CC
Operating D.C. Supply Voltage
4.5
16.0
V
I
F
(+)
LED Positive-Going Threshold Current
0.1
1.8
10.0
mA
V
CC
= 5.0 V
I
F
(+)/I
F
(-)
Hysteresis Ratio
1.05
1.20
1.60
V
CC
= 5.0 V
I
CCH
High Level Supply Current:
5.0
12.0
mA
V
CC
= 16 V, No Load On Output,
I
F
= 10 mA
Buffer, 10K Pull-up
OPB685
Buffer, Open-Collector
OPB686
Inverter, 10K Pull-up
OPB687
4.0
12.0
mA
V
CC
= 16 V, No Load On Output,
I
F
= 0 mA
Inverter, Open-Collector
OPB688
I
CCL
Low Level Supply Current:
5.5
12.0
mA
V
CC
= 16 V, No Load On Output,
I
F
= 0 mA
Buffer, 10K Pull-up
OPB685
Buffer, Open-Collector
OPB686
4.0
12.0
Inverter, 10K Pull-up
OPB687
6.5
12.0
mA
V
CC
= 16 V, No Load On Output,
I
F
= 10 mA
Inverter, Open-Collector
OPB688
5.0
12.0
V
OH
High Level Output Voltage:
(V
CC
-1.5)
(5)
V
I
OH
= 100
A, I
F
= 10 mA
Buffer, 10K Pull-up
OPB685
Inverter, 10K Pull-up
OPB687 (V
CC
-1.5)
(5)
V
I
OH
= 100
A, I
F
= 0 mA
(4)
I
OH
High Level Output Current:
100
A
V
CC
= 16 V, V
OH
= 30 V, I
F
= 10 mA
Buffer, Open-Collector
OPB686
Inverter, Open-Collector
OPB688
100
A
V
CC
= 16 V, V
OH
= 30 V, I
F
= 0 mA
V
OL
Low Level Output Voltage:
0.4
V
V
CC
= 4.5 V, I
OL
= 16 mA, I
F
= 0 mA
(4)
Buffer, 10K Pull-up
OPB685
Buffer, Open-Collector
OPB686
Inverter, 10K Pull-up
OPB687
0.4
V
V
CC
= 4.5 V, I
OL
= 16 mA, I
F
= 10 mA
Inverter, Open-Collector
OPB688
t
r
, t
f
Output Rise Time, Output Fall Time
30
ns
V
CC
= 5 V, I
F
= 0 or 10 mA, f = 10 kHz,
D.C. = 50%, R
L
= 300
t
PLH
Propagation Delay, Low-High
1.0
s
Buffer, 10K Pull-up
OPB685
Buffer, Open-Collector
OPB686
Inverter, 10K Pull-up
OPB687
2.0
s
Inverter, Open-Collector
OPB688
t
PHL
Propagation Delay, High-Low
2.0
s
Buffer, 10K Pull-up
OPB685
Buffer, Open-Collector
OPB686
Inverter, 10K Pull-up
OPB687
1.0
s
Inverter, Open-Collector
OPB688
(4) Nor mal ap pli ca tion would be with light source blocked, simu lated by I
F
= 0mA.
(5) V
OH
= V
CC
-1.5V for V
CC
= 4.5V to 16V.
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
12-57
Types OPB685, OPB686, OPB687, OPB688
Typi cal Per form ance Curves
A
K
V
CC
OUT
GND
A
K
V
CC
OUT
GND
A
K
V
CC
OUT
GND
A
K
V
CC
OUT
GND
OPB685...Buffer/10K PU
OPB687...Inverter/10K PU
OPB688...Inverter/OC
OPB686...Buffer/OC
Switching Time vs Ambient
Temperature
T
A
- Ambient Temperature -
o
C
Rise Time vs Output Load vs
Ambient Temperature
T
A
- Ambient Temperature -
o
C
Typical Thermal Derating Curve
T
A
- Ambient Temperature -
o
C
Sche mat ics
Safe Operating
Area
V
CC
= 5 V
I
F
= 0 or 10 mA
f = 10 KHz
D.C. = 50%
R
L
= 300
t
f
t
r
V
CC
= 5 V
I
F
= 0 or 10 mA
f = 10 kHz
DC = 50%
* - Equivalent Output Load
Including Pull-up if Applicable
R
L
= 2
*
R
L
= 390*
R
L
= 300
*
R
L
= 1
*
No Heat Sink;
Derate 2.50 mW/
o
C
Above 30
o
C
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
12-59
Types OPB685, OPB686, OPB687, OPB688
Typi cal Per form ance Curves
T
A
- Ambient Temperature -
o
C
Normalized Forward Voltage vs
Ambient Temperature
Forward Current vs Forward
Voltage Input Diode
I
F
- Forward Current - mA
Trigger Current vs Ambient
Temperature
T
A
- Ambient Temperature -
o
C
V
CE
= 5 V
I
F
= 5 mA
Normalized to
T
A
= 25
o
C
T
A
- Ambient Temperature -
o
C
Normalized Supply Current vs
Ambient Temperature
OPB685, OPB687 Normalized
High Level Output Voltage vs
Ambient Temperature
T
A
- Ambient Temperature -
o
C
OPB686, OPB688 High Level
Output Current vs Ambient
Temperature
T
A
- Ambient Temperature -
o
C
Low Level Output Voltage vs
Ambient Temperature
T
A
- Ambient Temperature -
o
C
OPB685, OPB686 Propagation
Delay vs Ambient Temperature
T
A
- Ambient Temperature -
o
C
I
CCH
, I
CCL
V
CC
= 16 V
V
OH
= 30 V
V
CC
= 5 V
I
F
= 0 or 10 mA
f = 10 kHz
DC = 50%
R
L
= 300
I
TLH
I
THL
V
CC
= 5 V
Output Unloaded
V
CC
= 5 V
Output Unloaded
V
CC
= 4.5 V
I
OL
= 16 mA
V
OL
V
OH
V
CC
= 16 V
I
OH
= 100
A
OPB687, OPB688 Propagation
Delay vs Ambient Temperature
T
A
- Ambient Temperature -
o
C
V
CC
= 5 V
I
F
= 0 or 10 mA
f = 10 kHz
DC = 50%
R
L
= 300
t
PLH
t
PHL
I
F
@ 500 ms pulse width
I
OH
t
PHL
t
PLH
Op tek Tech nol ogy, Inc. 1215 W. Crosby Road Car roll ton, Texas 75006 (972) 323- 2200 Fax (972) 323- 2396
12-58
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