KF2002-GF71A
KF2002-GF71A is Compact low voltage thick film thermal printhead manufactured by ROHM.
Features
1) A wide range of power supply voltage, from 4.2V-8.5V, can be used to drive the printhead. This gives the flexibility for use with printers designed to operate with power from various battery configurations. 2) To allow the design of pact printers for use in calculators and other mobile applications, the basic specifications of the unit have been standardized. This gives engineers greater freedom to develop mechanical designs. 3) One rank resistance value of 210Ω ± 4% eliminates the inconvenience of rank selection.
!External dimensions (Units : mm)
54 48 (Effective Print Width)
Max.1.7 (1.1) Dot #1
MAX.12.5 1.4±0.3
(10)
(7.35)
Dot #384
Exposed Coductor Side
Connector
No.21
No.1 ax
.φ
8. 0
Insert Direction
1/4
Printheads
!Equivalent circuit
VH GND DOT #384 DOT #1
STB3 STB2
STB1
LATCH REGISTER
DI CLK N.C.
SHIFT REGISTER
Fig.1
!Pin assignments
No. 1 2 3 4 5 6 7 8 9 10 11 Circuit VH VH VH N.C. CLK LAT STB2 STB1 GND GND GND No. 12 13 14 15 16 17 18 19 20 21 Circuit GND GND GND TM VDD STB3 DI VH VH VH
2/4
Printheads
!Timing chart tw CLK CLOCK (CLK) t setup DI DATA IN (DI) "High":BLACK "Low" :WHITE t hold DI t setup LAT LATCH (LAT) "High":HOLD "Low" :THROUGH tw LAT STROBE (STB) t hold LAT t setup STB tdo DRIVER OUT tdo
Fig.2
!Characteristics
Parameter Effective printing width Dot pitch Total dot number Average resistance value Applied voltage Applied power Print cycle Pulse width Maximum number of dots energized simultaneously Maximum clock frequency Maximum roller diameter Running life / pulse life Operating temperature Symbol
- -
- Rave VH PO SLT...
