Page 1
NF2004-VA20A
Printheads
Hight Speed Thermal Printhead
(8dots / mm)
NF2004-VA20A
The NF2004-VA20A is a flat thin film thermal printhead that supports medium speed and high speed printing, suited
for general purpose compact printers as well as label printers.
Applications
!
Bar code label printers
Ticket printers
General purpose compact printers
Features
!
1) Standard glazed components to accommodate thick paper.
2) High speed clock to facilitate external heat history control.
3) Using a hard conductive film as a protective film on the heating element offers excellent resistance to electrostatic
damage.
4) Compatible with the NF3004-VA20A (300dpi) in mechanical specifications, to facilitate the making of a series of
printers.
External dimensions
!
Max. 48
TYPE OF PRINTHEAD
HIROSE HIF3FC-26PA-2.54DS
(36)
φ3 H10
EFFECTIVE DEPTH 3
Note: No heat history control function inside the thermal printhead. External heat history control is required for high speed printing.
(6)
(3.5)
25±0.5
(Units : mm)
#2
#1
10±0.2
16±0.2
40±0.3
(22)
124±0.5
112
100±0.2
80±0.3
#26
#25
#1
#6
JST B6PS-VH
DOT No.1
Max.φ20
Min. 4.3
Max.5
3-M3
EFFECTIVE DEPTH 3
2.8±0.2
7.3±0.3
17.8±0.2
(21.3)
φ
3 H10 LENGTH 4
EFFECTIVE DEPTH 3
DOT No.1
6±0.2
(26)
Max.10
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Printheads
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
Pin configuration
!
HIROSE
CircuitNo.
1 GND
3
5
7
9
11
13
15
17
19
21
23
25
DI2
/LAT
NC
/STB1
TM TM
SENS3
SENS1 BEO
NC
NC
NC
NC
NC
2
4
6
8
10
12
14
16
18
20
22
24
26
VDD
CLK(CP)
/STB2
DI1
NC
SENS2
NC
NC
NC
NC
NC
Symbol Typical Unit
112
0.125
896
JST
1
2
3
4
5
6
Rave
H
V
P
O
SLT
ON
T
CircuitNo.No. Circuit
COM
COM
COM
GND
GND
GND
800
24
0.61
0.82
0.388
896
10
20
50 / 1 billion
60
NF2004-VA20A
mm
mm
dots
Ω
V
dot
ms
ms
dots
MHz
mm
km / pulses
°C
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Printheads
Timing chart
!
CLK
DI
BEO
CLK
NF2004-VA20A
Min.45ns
Min.30ns Min.10ns
Min.100ns Min.50ns
/LAT
/STBn
DRIVER
OUT
Min.100ns Min.300ns
Max.12.5µs Max.12.5µs
Fig.1
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Printheads
Equivalent circuit
!
VH
GND
BEO
/STB2
/STB1
NF2004-VA20A
DOT 1DOT 896
/LAT
DI 2
DI 1
CLK
Vdd
GND
LATCH
896 641 449640 448 193 192 1
0.1µF 50V
TM
TM
DI No.
DI 2
DI 1
DOT No.
896
∼
449
∼
1
448
Fig.2
/STR No. DOT No.
/STB2
/STB1
896
448
∼
449
∼
1
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Printheads
Adaptation speed chart
!
Adaptation speed chart
NF2004-VA20A
0123456789
NB2004-VA20A
Data sheet
!
1.5
1.4
1.2
1.0
0.8
0.6
OPTICAL DENSITY
0.4
0.2
0.0
0.10 0.15 0.20 0.25 0.320.30
ENERGY(
Without external heat
history control
mJ / dot)
Fig. 3 Representative density curve
Inch/second[IPS]
10
OVER
With external heat control
0.50
0.45
0.40
mJ / dot)
0.35
0.30
0.25
0.20
0.15
0.10
0.05
SUPPLY ENERGY(MAX) (
0.00
0 0.4 0.8 1.2 1.6 2.01.8 2.21.41.00.60.2
SCANNING LINE TIME(
Fig. 4 Maximum energy curve
ms / line)
180
160
140
kΩ)
120
100
80
60
40
RESISTANCE VALUE :(
20
0
-100 10203040506070
TEMPERATURE : (°C)
R25=30kΩ
B=3950k
Fig. 5 Thermistor curve
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