Transmissive Sensor
HOA1877
DESCRIPTION
FEATURES
Choice of phototransistor or photodarlington
output
Wide operating temperature range
(- 55C to +100C)
0.50 in.(12.7 mm) high optical axis position
0.375 in.(9.52 mm) slot width
The HOA1877 series consists of an infrared emitting
diode facing an NPN silicon phototransistor
(HOA1877- 001, - 002) or photodarlington
(HOA1877- 003) encased in a black thermoplastic
housing. Detector switching takes place whenever an
opaque object passes through the slot between emitter
and detector. The HOA1877 series has a 0.050 in.(1.27
mm) dia. detector aperture and employs metal can
packaged components. For additional component
information see SE1450, SD1440, and SD1410.
Housing material is polycarbonate. Housings are
soluble in chlorinated hydrocarbons and ketones.
Recommended cleaning agents are methanol and
isopropanol.
DIM_049.cdr
INFRA-47.TIF
OUTLINE DIMENSIONS in inches (mm)
3 plc decimals
0.010(0.25)
Tolerance
2 plc decimals
0.020(0.51)
Honeywell reserves the right to make
changes in order to improve design and
supply the best products possible.
h
306
Transmissive Sensor
HOA1877
ELECTRICAL CHARACTERISTICS
UNITS
TEST CONDITIONS
MIN
PARAMETER
SYMBOL
TYP
MAX
IR EMITTER
DETECTOR
COUPLED CHARACTERISTICS
ABSOLUTE MAXIMUM RATINGS
(25C Free-Air Temperature unless otherwise noted)
Operating Temperature Range
-55C to 100C
Storage Temperature Range
-55C to 125C
Soldering Temperature (10 sec) 260C
IR EMITTER
Power Dissipation
75 mW []
Reverse Voltage
3 V
Continuous Forward Current
50 mA
DETECTOR
TRANS.
DARLINGTON
Collector-Emitter Voltage
30 V
15 V
Emitter-Collector Voltage
5 V
5 V
Power Dissipation
75 mW []
75 mW []
Collector DC Current
30 mA
30 mA
SCHEMATIC
Honeywell reserves the right to make
changes in order to improve design and
supply the best products possible.
h
307
Transmissive Sensor
HOA1877
IRED Forward Bias Characteristics
gra_092.ds4
Forward voltage - V
F
o
r
w
a
r
d
c
u
r
r
e
n
t
-
m
A
0
10
20
30
40
50
60
70
80
90
100
0.8
1.0
1.2
1.4
1.6
1.8
2.0
Pulsed
condition
T
A
= 25 C
T
A
= 80 C
T
A
= -40 C
Fig. 1
Non-Saturated Switching Time vs
Load Resistance
gra_096.ds4
Load resistance - Ohms
R
e
s
p
o
n
s
e
t
i
m
e
-
s
1
10
100
1000
10
100
1000
10000
Phototransistor
Photodarlington
Fig. 2
Dark Current vs
Temperature
gra_303.cdr
Fig. 3
Collector Current vs
Ambient Temperature
gra_095.ds4
Free-air temperature - C
N
o
r
m
a
l
i
z
e
d
c
o
l
l
e
c
t
o
r
c
u
r
r
e
n
t
0.0
0.6
1.2
-50
0.4
0.2
0.8
1.0
-25
0
25
50
100
75
Fig. 4
All Performance Curves Show Typical Values
Honeywell reserves the right to make
changes in order to improve design and
supply the best products possible.
h
308
Transmissive Sensor
HOA1877
Honeywell reserves the right to make
changes in order to improve design and
supply the best products possible.
h
309
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