Custom Audio Electronics MT558, User Manual

Page: 16 / 32

4.4 Printing data and printing position
Print data of 384-bit length is printed in the arrangement as shown in the following fi gure :
Printing data
Printing paper
DATA IN
Printer mechanism
Motor
1 2 3 4 . . . . . . 383 384
Printing surface
Paper feeding
direction
4.5 Electrical characteristics of circuit
ITEM SYMBOL MINI TYP. MAXI. UNIT CONDITIONS
Head power supply V
H
3.30 5.00 8.00 V
Logic power supply V
DD
3.00 5.00 5.50 V
Logic supply current I
DD
- 9.6 30 mA
fCLK = 5MHz
SI = fCLK/2
Input Voltage
High V
IH
0.7 x V
DD
- V
DD
V
STB, DI, LAT, CLK
Low V
IL
- - 0.3 x V
DD
V
Data input current
(DI)
High
(1)
I
IH
DI - - 0.5 μ A
VIH = 5V
VDD = 5V
Low I
IL
DI -0.5 - - μ A
VDD = 5V
VIL = 0V
STB input current
(STB)
High (1) I
IH
STB - - 55 μ A
VIH = 5V
VDD = 5V
Low I
IL
STB - - -0.5 μ A
VDD = 5V
VIL = 0V
Clock input current
(CLK)
High
(1)
I
IH
CLK - - 3 μ A
VIH = 5V
VDD = 5V
Low I
IL
CLK - - -3 μ A
VDD = 5V
VIL = 0V
Latch input current
(LAT)
High
(1)
I
IH
LAT - - 3 μ A
VIH = 5V
VDD = 5V
Low I
IL
LAT - - -3 μ A
VDD = 5V
VIL = 0V
(1)
Note: Only for MT558-0101 model
Each strobe includes pull-down resistance of 300K Ω ± 50% per IC.
4. PRINT HEAD
16 MT558
User Manual