2-29
Table 2-13 Paper Detector Input/Output Conditions
Item
Symbol
Conditions
Std.
Max.
Forward voltage
V
F
I
F
=20 mA
1.2 V
1.4 V
Peak forward
voltage
V
FM
I
FM
=0.5A
3.0 V
4.0 V
Reverse current
I
R
V
R
=6 V
10
µ
A
LED (input)
Capacity between
terminals
Ct
V
R
=0 V, f=1 kHz
50 pF
100 pF
Phototransistor
(output)
Dark current
I
CEO
V
CE
=20 V
10
-9
A
10
-7
A
Photoelectric
current
I
C
I
F
=4 mA, V
CE
=2 V
45
µ
A
120
µ
A
Response time
(at rise)
t
r
20
µ
s
100
µ
s
Response time
(at fall)
t
f
I
C
=100
µ
A,
V
CE
=2 V
R
L
=1 k
Ω
, d=1 mm
1
20
µ
s
100
µ
s
Transfer char.
Leak current
I
LEAK
I
F
=4 mA, V
CE
=2 V
0.1
µ
A
1
d
= Sensing distance
Summary of Contents for LTP3445
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