KERN & SOHN VFS 2T1 Addendum - Manual (Page 7)

EPM205 - Technical reference - Rev. A Page 7
Advanced Printing Systems
3. THERMAL HEAD AND PRINTING CONFIGURATION
3.1. Outlines
Heat element structure: 2 heaters/dot
Number of heat elements: 384 dots
Heat element pitch: 0.125 mm
Average resistance: LV - 123 Ω ±4%
HS - 176 Ω ±4%
3.2. Thermal head electrical characteristics
Item Symbol Min. Typ. Max. Unit
Print voltage VH - 5.0 LV= 7.2
HS= 8.5 V
Logic voltage Vdd 2.7 5.00 5.25 V
Logic current Idd - - 48 mA
Input voltage (High) VIH 0.8 x Vdd - Vdd V
Input voltage (Low) VIL 0 - 0.2 x Vdd V
Data input current (DI) High IIH DI - - 0.5 µA
Data input current (DI) Low IIL DI - - -0.5 µA
STB 1 to 6 input current (High) IIH STB - - 30 µA
STB 1 to 6 input current (Low) IIL STB - - -0.5 µA
Clock input current (High) IIH CLK - - 3 µA
Clock input current (Low) IIL CLK - - -3 µA
Latch input current (High) IIH LAT - - 3 µA
Latch input current (Low) IIL LAT - - -3 µA
Data out output voltage (High) VDOH 4.45 - - V
Data out output voltage (Low) VDOL - - 0.05 V
Output voltage (driver out) VOL - 1.0 - V
Clock frequency f CLK - - 8 MHz
Clock width tw CLK 30 - - ns
Data setup time tsetup DI 30 - - ns
Data hold time thold DI 10 - - ns
Latch width tw LAT 100 - - ns
Latch setup time tsetup LAT 200 - - ns
Latch hold time thold LAT 50 - - ns
Data out delay time td DO - - 120 ns
STB setup time tsetup STB 300 - - ns
Driver out delay time tdo - - 5 µs