Reflective Photosensors (Photo Reflectors)
CNB1304H (ON2175)
Reflective Photosensor
Unit : mm
4.0±0.3
(R2.3)
ø2.2±0.3
2-ø1.2±0.15
(4-R0.3)
Tape end sensor for DAT
Overview
CNB1304H 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.
3.75±0.15
+0
8.0
2-ø1.2±0.15
–0.3
7.0±0.3
(C0.3)
+0
ø1.2
–0.3
Features
Fast response
+0.2
2-0.4±0.2
2-0.15
–0.1
(3.75)
(3.75)
Small size and light weight
4
3
2
1
Absolute Maximum Ratings (Ta = 25˚C)
Parameter
Symbol Ratings Unit
1
2
3
4
Reverse voltage (DC)
Forward current (DC)
Power dissipation
Collector current
VR
IF
3
50
75
20
30
5
V
mA
mW
mA
V
Pin connection
Input (Light
(Note) ( ) Dimension is reference
emitting diode)
*1
PD
IC
Collector to emitter voltage VCEO
Output (Photo
transistor)
Emitter to collector voltage VECO
V
*2
Collector power dissipation PC
100
mW
˚C
Operating ambient temperature
Topr –25 to +85
Temperature
Storage temperature
Tstg –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.
Electrical Characteristics (Ta = 25˚C)
Parameter
Symbol
VF
Conditions
min
typ
max
1.5
Unit
V
Forward voltage (DC)
Reverse current (DC)
IF = 50mA
VR = 3V
Input
characteristics
IR
10
µA
µA
µA
µs
Output characteristics Collector cutoff current
ICEO VCE = 10V
0.2
*1
Collector current
IC
VCE = 5V, IF = 20mA, RL = 100Ω
30
Transfer
Response time
tr , tf*2 VCC = 10V, IC = 0.5mA, RL = 100Ω
6
characteristics
Collector to emitter saturation voltage VCE(sat) IF = 50mA, IC = 0.1mA
*2
0.5
V
*1 IC Measurement method
Switching time measurement circuit
(Unit : mm )
Sig.IN
VCC
2.5
(Input pulse)
1
1
90%
10%
Sig.OUT
(Output pulse)
td
50Ω
RL
tr
tf
td : Delay time
prism
tr : Rise time (Time required for the collector current to increase from
10% to 90% of its final value)
CNB1304
tf : Fall time (Time required for the collector current to decrease from
90% to 10% of its initial value)
Note) The part number in the parenthesis shows conventional part number.
1