Seiko Instruments LTP F Series manual 38

3.5.6Thermal Head Electrical Characteristics (LTPF347)

Table 3-9 Thermal Head Electrical Characteristics (LTPF347)

(Ta=25 ± 10°C)

Item		Symbol	Conditions		Rated value			Unit
				MIN		TYP	MAX
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	−		13.0	14.8	A
			activated dots
			number=352
Logic block voltage		Vdd		4.75		5.00	5.25	V
Logic block current		Idd	FCLK=8MHz,fDI=1/2fclk	−		−	64	mA
Input voltage	"High"	VIH	CLK,DAT,LATCH,DST	0.8⋅Vdd		−	Vdd	V
	"Low"	VIL	CLK,DAT,LATCH,DST	0		−	0.2⋅Vdd	V
DAT input	"High"	IIH DAT	VIH = 5V	−		−	0.5	∝A
current	"Low"	IIL DAT	VIL = 0V	−		−	−0.5	∝A
DST input	"High"	IIH DST		−		−	120	∝A
current	"Low"	IIL DST		−		−	−2.0	∝A
CLK input	"High"	IIH CLK		−		−	2.0	∝A
current	"Low"	IIL CLK		−		−	−2.0	∝A
LATCH input	"High"	IIH LAT		−		−	2.0	∝A
current	"Low"	IIL LAT		−		−	−2.0	∝A
DAT output	"High"	VDOH	OPEN state, Vdd =4.5V	4.45		−	−	∝A
current	"Low"	VDOL		−		−	0.05	∝A
CLK frequency		f CLK		−		−	8	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	−		−	5	ns

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