Seiko LTPD245D, Техническое описание

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3-20
Table 3-11 Electrical Characteristics of Thermal Head (LTPD345D)
(at 25
°
C )
Rated value
Item Symbol Conditions
MIN TYP MAX
Unit
Thermal head
heat element resistance
R
H
168.9 176.0 183.1 Ω
Thermal Head
drive voltage
V
P
4.75 - 9.5 V
Thermal Head
drive current
I
P
at the number of simultaneously activated dots = 96
- - 5.4 A
Logic voltage V
dd
2.7 5 5.25 V
Logic current I
dd
f
DI
=1/2f
CLK
- - 54 mA
High V
IH
CLK, DI, LAT , DST 0.8V
dd
- V
dd
V
Input voltage
Low V
IL
CLK, DI, LAT , DST 0 - 0.2 V
dd
V
High I
IH
DI V
IH
= V
dd
- - 0.5
μ
A
DI input
current
Low I
IL
DI V
IL
= 0V - - -0.5
μ
A
High I
IH
DST V
dd
- - 110
μ
A
DST input
current
Low I
IL
DST V
IL
= 0V - - -1.0
μ
A
High I
IH
CLK V
IH
= V
dd
- - 1.5
μ
A
CLK input
current
Low I
IL
CLK V
IL
= 0V - - -1.5
μ
A
High
I
IH
LAT V
IH
= V
dd
- - 1.5
μ
A
LAT input
current
Low
I
IL
LAT V
IL
= 0V - - -1.5
μ
A
2.7V ≤ Vdd<3.0 V - - 5 MHz
CLK frequency f
CLK
3.0 ≤ Vdd ≤ 5.25V - 8 MHz
2.7V ≤ Vdd<3.0 V 50 - - ns
CLK pulse width t1 See the Timing Chart.
3.0 ≤ Vdd ≤ 5.25V 30 - - ns
2.7V ≤ Vdd<3.0 V 70 - - ns
DI setup time t2 See the Timing Chart.
3.0 ≤ Vdd ≤ 5.25V 30 - - ns
2.7V ≤ Vdd<3.0 V 40 - - ns
DI hold time t3 See the Timing Chart.
3.0 ≤ Vdd ≤ 5.25V 30 - - ns
LAT
setup time t4 See the Timing Chart. 100 - - ns
LAT
pulse width t5 See the Timing Chart. 100 - - ns
LAT
hold time t6 See the Timing Chart. 50 - - ns
DST setup time t7 See the Timing Chart. 300 - - ns
2.7V ≤ Vdd<3.0 V 36 - - μ s
LAT
wait time t8* See the Timing Chart.
3.0 ≤ Vdd ≤ 5.25V 30 - - μ s
*: If MIN at " LAT wait time" in the table cannot be secured, it may cause Vp voltage fluctuations.