Seiko Instruments LTP F Series User Manual

Table 3-7  Thermal Head Electrical Characteristics (LTPF247)

(Ta

=25 ± 10°C)

Head resistance

RH

630.5

650

669.5

Ω

Head drive voltage

Vp

21.6

24.0

26.4

V

Head drive current

Ip

At max. simultaneously
activated dots
number=248

−

9.2

10.4

A

Logic block voltage

Vdd

4.75

5.00

5.25

V

Logic block current

Idd

fCLK=8MHz,fDI=1/2fCLK

−

−

64

mA

"High"

VIH

CLK,DAT,LATCH,DST

0.8

×Vdd

−

Vdd

V

Input voltage

"Low"

VIL

CLK,DAT,LATCH,DST

0

−

0.2

×Vdd

V

"High"

IIH DAT

VIH = 5V

−

−

0.5

µA

DAT

 input

current

"Low"

IIL DAT

VIL = 0V

−

−

−0.5

µA

"High"

IIH DST

−

−

120

µA

DST

 input

current

"Low"

IIL DST

−

−

−2.0

µA

"High"

IIH CLK

−

−

2.0

µA

CLK

 input

current

"Low"

IIL CLK

−

−

−2.0

µA

"High"

IIH LAT

−

−

2.0

µA

LATCH

 

input

current

"Low"

IIL LAT

−

−

−2.0

µA

"High"

VDOH

OPEN state, Vdd =4.5V

4.45

−

−

µA

DAT

 

output

current

"Low"

VDOL

−

−

0.05

µA

CLK frequency

f CLK

−

−

4

MHz

CLK pulse width

tw CLK

See Timing Chart

35

−

−

ns

DAT setup-time

tsetup DI See Timing Chart

30

−

−

ns

DAT hold time

thold DI

See Timing Chart

10

−

−

ns

DAT out delay time

td DO

See Timing Chart

−

−

120

ns

LATCH pulse width

tw LAT

See Timing Chart

100

−

−

ns

LATCH setup time

tsetup LAT See Timing Chart

200

−

−

ns

LATCH hold time

thold LAT See Timing Chart

50

−

−

ns

DST setup time

tsetup DST See Timing Chart

300

−

−

ns

Output delay time

tDo

See Timing Chart

−

−

10

ns