3-17
3.4.3 Electrical Characteristics of Thermal Head
Table 3-10 shows electrical characteristics of thermal head.
Table 3-10 Electrical Characteristics of Thermal Head
Vdd: 3.0 V to 3.6 V
(Temperature : 25
C )
Rated Value
Item Symbol
Conditions
Min. Typ. Max.
Unit
Thermal head
heat element resistance
R
H
162 180 198
Ω
Thermal head
drive voltage
Vp
5.5
-
9.5 V
Thermal head
drive current
I
P
The number of simultaneously
activated dots = 45
-
-
2.64 A
Logic voltage
Vdd
3.0
3.3
3.6
V
Logic current
I
dd
f
DI
=1/2f
CLK
-
-
15.0 mA
High
V
IH
CLK, DI, /LAT, DST
0.8×Vdd
-
Vdd V
Input voltage
Low V
IL
CLK, DI, /LAT, DST
0
-
0.2×Vdd
V
High
I
IH
DI
V
IH
= Vdd
-
-
0.5
A
DI input current
Low I
IL
DI
V
IL
= 0V
-
-
-0.5
A
High
I
IH
DST V
IH
= Vdd
-
-
210
A
DST input current
(High active)
Low I
IL
DST V
IL
= 0V
-
-
-30
A
High
I
IH
CLK V
IH
= Vdd
-
-
1.0
A
CLK input current
Low I
IL
CLK V
IL
= 0V
-
-
-1.0
A
High
I
IH
/LAT
V
IH
= Vdd
-
-
1.0
A
/LAT input current
Low I
IL
/LAT V
IL
= 0V
-
-
-1.0
A
CLK frequency
f
CLK
-
-
8.0
MHz
CLK pulse width
t1
*1
47.5
-
-
ns
DI setup time
t2
*1
40
-
-
ns
DI hold time
t3
*1
40
-
-
ns
/LAT setup time
t4
*1
120
-
-
ns
/LAT pulse width
t5
*1
120
-
-
ns
/LAT hold time
t6
*1
70
-
-
ns
DST setup time
t7
*1
300
-
-
ns
/LAT wait time
t8
*1,*2
8000
-
-
ns
*1: See the timing chart.
*2: If MIN at "/LAT wait time" in the table cannot be secured, it may cause Vp voltage fluctuations.