Specifications

3-28
Table 3-13 Detectors Input / Output Conditions
Item Symbol
Conditions Std. Max.
Forward voltage V
F
I
F
=10mA 1.15V 1.3V LED
(input)
Reverse current
I
R
V
R
=5V - 10µA
Photo-transistor
(output)
Dark current I
CEO
V
CE
=24V - 0.1µA
Photo electric
current
I
C
I
F
=10mA, V
CE
=5V 450µA 1100µA
Response time
(at rise)
t
r
I
C
=1mA, V
CE
=10V 10µs -
Response time
(at fall)
t
f
R
L
=1kΩ, d=1mm
1
10µs -
Transfer
characteristics
Leak current I
LEAK
I
F
=10mA, V
CE
=5V - 0.2µA
1
d = sensing distance
3.7.2 Sample External Circuit
The HS signal is high when the thermal head is in the “up” position.
The PS signal is high when paper is exhausted.
Figure 3-13 Sample External Circuit of the Head-Up/Paper Detector