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Panasonic Semiconductor |
Reflective Photosensors (Photo Reflectors)
ON2175
Reflective Photosensor
Tape end sensor for DAT
Outline
ON2175 is a sensor which consists of a high efficiency GaAs
infrared light emitting diode and a high sensitivity Si phototransistor
which are arranged together in the same direction. It detects the
beginning and end of a tape based on changes in the amount of light
reflected from a prism which is situated outside of the sensor.
Features
Fast response
Small size and light weight
Absolute Maximum Ratings (Ta = 25˚C)
Parameter
Symbol Ratings
Reverse voltage (DC)
Input (Light Forward current (DC)
emitting diode)
Power dissipation
Collector current
VR
IF
PD*1
IC
3
50
75
20
Output (Photo Collector to emitter voltage
transistor) Emitter to collector voltage
Collector power dissipation
VCEO
VECO
PC*2
30
5
100
Temperature Operating ambient temperature Topr –25 to +85
Storage temperature
Tstg –30 to +100
*1 Input power derating ratio is 1.0 mW/˚C at Ta ≥ 25˚C.
*2 Output power derating ratio is 1.34 mW/˚C at Ta ≥ 25˚C.
Unit
V
mA
mW
mA
V
V
mW
˚C
˚C
(R2.3) 4.0±0.3 ø2.2±0.3
2-ø1.2±0.15
(4-R0.3)
Unit : mm
3.75±0.15
8.0
+0
–0.3
7.0±0.3
(C0.3)
2-ø1.2±0.15
ø1.2
+0
–0.3
2-0.4±0.2
(3.75)
42
2-0.15
+0.2
–0.1
(3.75)
31
1 23
4
Pin connection
(Note) ( ) Dimension is reference
Electrical Characteristics (Ta = 25˚C)
Parameter
Symbol
Conditions
min typ
Input Forward voltage (DC)
VF IF = 50mA
characteristics Reverse current (DC)
IR VR = 3V
Output characteristics Collector cutoff current
ICEO VCE = 10V
Collector current
Transfer
characteristics Response time
IC*1 VCE = 5V, IF = 20mA, RL = 100Ω
tr , tf*2 VCC = 10V, IC = 0.5mA, RL = 100Ω
Collector to emitter saturation voltage VCE(sat) IF = 50mA, IC = 0.1mA
30
6
*1 IC Measurement method
*2 Switching time measurement circuit
2.5
11
(Unit : mm )
Sig.IN
VCC
(Input pulse)
50Ω
Sig.OUT
RL
(Output pulse) td
tr
max Unit
1.5 V
10 µA
0.2 µA
µA
µs
0.5 V
90%
10%
tf
ON2175
prism
td : Delay time
tr : Rise time (Time required for the collector current to increase from
10% to 90% of its final value)
tf : Fall time (Time required for the collector current to decrease from
90% to 10% of its initial value)
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