KD2004-CF20A
Printheads
Compact medium speed thick film thermal
printhead (8dots / mm)
KD2004-CF20A
KD2004-CF20A is suitable for devices, such as high-speed POS and label printer applications, that require thermal
printheads capable of higher prin ting rates. Improved power circui t design means that w ith heavier curre nt it is possible to
print at speeds as high as 150 mm/s. The GK Series is the thus ideal for label printers that need high printing rates.
zApplications
POS terminals, Label printers, CAT terminal s, Multi-purpose small-si zed printers
zFeatures
1) Using a special compact partial glaze and new heating element structure, achieves high-speed printing at 150 mm/s.
2) The use of the highly-durable conductive protective film has improved countermeasures against static electricity .
3) The VH and GND sections of the power circuitry have been strengthened so that heavier current can be applied.
4) One rank resistance value of 800Ω ± 3% eliminates the inconvenience of rank selection.
5) The required driving voltage of 3.15 to 5.25V allows wide range of power supply voltage setting. This also allows
multiple choice of electronic co mponents fo r printers.
zDimensions (Unit : mm)
Max.20
(5)
2.6±0.1
118
108 (Effective print width)
Dot #864 Dot #1
Connector AConnector B
Max.
Max.1.7
5.1±0.4
4±0.2
20.0
φ
No.1No.15No.15 No.1
110±0.2
2-M3 (Effective depth 3)
4±0.2
5.1±0.2
10.2
1/4
Printheads
zEquivalent circuit
KD2004-CF20A
V
H
DOT #864 DOT #1
V
H
GND
STB6
STB5
STB4
DI
TM
TM
CONNECTOR B
#864 #721 #720 #577 #576 #433 #1#144#145#288#289#432
zPin assignments
CONNECTOR A CONNECTOR B
No.
10
11
12
13
14
15
Circuit
1V
2
3
4
5
6
7
8
9
H
V
H
V
H
V
H
DO
LAT
CLK
V
DD
STB1
STB2
STB3
GND
GND
GND
GND
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Circuit
GND
GND
GND
GND
GND
TM
TM
STB4
STB5
STB6
DI
V
V
V
V
LATCH REGISTER
SHIFT REGISTER
THERMISTOR
30kΩ B : 3950K
Fig. 1
H
H
H
H
CONNECTOR A
GND
V
DD
STB1
STB2
STB3
LAT
DO
CLK
2/4
Printheads
zTiming chart
KD2004-CF20A
tw CLK
CLK (CLOCK)
DI (DATA IN)
"High" : BLACK
"Low" : WHITE
DO (DATA OUT)
"High" : BLACK
"Low" : WHITE
LAT (LATCH)
"High" : HOLD
"Low" : THROUGH
STB (STROBE)
DRIVER OUT
t setup DI
zCharacteristics
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
t hold DI
td DO
t hold LATt setup LAT
t setup STB
tw LAT
t do
Fig.2
Symbol Typical Unit
−
−
−
Rave
H
V
P
O
SLT
ON
T
−
−
−
−
−
108
0.125
864
800
24.0
0.59
0.83
0.32
432
16
φ20.0
50/5×10
5 to 45
7
Min.15 µ sec(VDD=5V)*
Min.30 µ sec(V
t do
mm
mm
dots
Ω
V
W/dot
ms
ms
dots
MHz
mm
km/pulses
°C
DD
=3.3V)*
3/4
Printheads
zElectrical characteristic curves
0.8
0.7
0.6
0.5
mJ/dot)
0.4
0.3
ENERGY (
0.2
0.1
0
012345
SCANNING LINE TIME (
Fig.3 Adaptive speed chart
180
160
140
120
100
80
60
RESISTANCE : (kΩ)
40
20
0
−20 −10 10 30 50 700204060
Paper : KF50-HDA (OJI)
ms/line)
TEMPERATURE : (°C)
1.8
1.6
1.4
1.2
1.0
0.8
0.6
OPTICAL DENSITY
0.4
0.2
0.0
0.00 0.05 0.10 0.15 0.20 0.25 0.30
ENERGY (
SLT : 1.00ms/line
mJ/dot)
Fig.4 Representative density curve
KD2004-CF20A
0.8
0.7
0.6
0.5
mJ/dot)
0.4
0.3
ENERGY (
0.2
0.1
0
012345
SCANNING LINE TIME (
Fig.5 Maximum energy curve
ms/line)
Fig.6 Thermistor curve
4/4
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level
of reliability and the malfunction of which would directly endanger human life (such as medical
instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers
and other safety devices), please be sure to consult with our sales representative in advance.
It is our top priority to supply products with the utmost quality and reliability. However, there is always a chance
of failure due to unexpected factors. Therefore, please take into account the derating characteristics and allow
for sufficient safety features, such as extra margin, anti-flammability, and fail-safe measures when designing in
order to prevent possible accidents that may result in bodily harm or fire caused by component failure. ROHM
cannot be held responsible for any damages arising from the use of the products under conditions out of the
range of the specifications or due to non-compliance with the NOTES specified in this catalog.
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact your nearest sales office.
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Appendix1-Rev2.0
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