Table of Contents
Advertisement
2.6 Opto interrupter specification
TMP201 has one opto sensor, it performs dual functions - door open and end of paper detection.
The opto sensor is designed in a way that as soon as the door is opened, the distance between the
paper and the sensor increases, and this causes the end of paper sensor is to trigger.
Circuitry of the opto interrupter please refer to the following picture, logic voltage can be 3.3V,
also can be 5V.
Arrange the circuitry so that no energy is applied to the head when there is no paper. If the
head is energized when there is no paper and the head is in the down position, then both roller and
head may be strongly damaged.
Electro-Optical Characteristics( Ta=25℃)
Parameter
Forward oltage
Input
Reverse Current
Peak Wavelength
Collector Dark
Output
Collector-Emitter
Dark Current
Transfer
Characteristics
www.asia-printer.com
Symbol
V
Ｆ
I
Ｒ
λ
I
CEO
Current
V
CE(SAT)
Voltage
I
CEOD
Rise time
tr
Fall time
tf
YAEN208 technical reference
Min
Typ.
Max.
Unit
---
1.25
1.5
μA
---
---
10
---
940
---
nm
---
---
0.1
nA
μA
60
---
130
μA
---
---
1
μs
---
---
15
μs
---
---
15
Conditions
I
=4mA
V
F
V
=6V
R
I
=20mA
F
V
=10V
CE
VCE=2V,
IF=4mA
---
V
=2V
CE
I
=0.1mA
C
R
=1000Ω
L
21
Advertisement
Table of Contents
