ON2175 Datasheet, PDF (1/1 Pages) Panasonic Semiconductor – Reflective Photosensor

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 Unit
Reverse voltage (DC) V_R
3
V
Input (Light
Forward current (DC)
emitting diode)
I_F
50
mA
Power dissipation
P_D*1
75
mW
Collector current
I_C
20
mA
Output (Photo Collector to emitter voltage VCEO 30
V
transistor) Emitter to collector voltage V_ECO
5
V
Collector power dissipation P_C*2
100
mW
Temperature ^{Operating ambient temperature Topr –25 to +85 ˚C}
Storage temperature
T_stg –30 to +100 ˚C
*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.}
(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
2-0.15
+0.2
–0.1
(3.75)
(3.75)
4
2
3
1
1 23
4
Pin connection
(Note) ( ) Dimension is reference
Electrical Characteristics (Ta = 25˚C)
Parameter
Symbol
Conditions
min typ max Unit
Input ^{Forward voltage (DC)}
V_F I_F = 50mA
1.5 V
characteristics _{Reverse current (DC)}
I_R V_R = 3V
10 µA
Output characteristics Collector cutoff current
I_CEO V_CE = 10V
0.2 µA
Collector current
Transfer
I_C*1 V_CE = 5V, I_F = 20mA, R_L = 100Ω
30
µA
characteristics ^{Response time}
t_r , t_f*2 V_CC = 10V, I_C = 0.5mA, R_L = 100Ω
6
µs
Collector to emitter saturation voltage V_CE(sat) I_F = 50mA, I_C = 0.1mA
0.5 V
*1 _{IC Measurement method}
*2 _{Switching time measurement circuit}
(Unit : mm )
2.5
1_,,,,,,1_{,,,,,,,,, prism}
ON2175
Sig.IN
V_CC
(Input pulse)
Sig.OUT
50Ω
R_L
,, ,,,, _{td: Delay time}
(Output pulse) _td
t_r
90%
10%
t_f
t_r : Rise time (Time required for the collector current to increase from
10% to 90% of its final value)
t_f : Fall time (Time required for the collector current to decrease from
90% to 10% of its initial value)
1