KK472 datasheet(2/4 Pages) KODENSHI

Part #	KK472

Description	Liquid Crystal Display Controller

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Manufacturer	KODENSHI [KODENSHI_AUK CORP.]

Direct Link	http://www.kodenshi.co.kr

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KK472

DC ELECTRICAL CHARACTERISTICS (GND=0 V, VDD=3.0 V to 5.5 V, TA= 0°C to 70°C (depends on

display characteristics)

Guaranteed Limit

Symbol

Parameter

Test

Conditions

Min

Max

Uni

t

VDD

Power Supply Voltage

3.0

5.5

V

IDD

Power Supply Current (Note 1)

VDD =5.5 V

250

µA

VIL

Input Levels DI, SK, CS

0.8

V

VIH

0.7 VDD

VDD

VIL

BPA (as Osc. in)

0.6

V

VIH

VDD-0.6

VDD

VOL

Output Levels, BPC (as Osc. Out)

0.4

V

VOH

VDD-0.4

VDD

VBPA,BPB,BPC

ON

Backplane Outputs (BPA,BPB,BPC)

During

VDD -∆V

VDD

V

VBPA,BPB,BPC

OFF

BP + Time

1/3VDD -∆V

1/3VDD +∆V

VBPA,BPB,BPC

ON

Backplane Outputs (BPA,BPB,BPC)

During

0

∆V

V

VBPA,BPB,BPC

OFF

BP - Time

2/3VDD -∆V

2/3VDD +∆V

VSEG ON

Segment Outputs (SA1 ∼ SA4)

During

0

∆V

V

VSEG OFF

BP + Time

2/3VDD -∆V

2/3VDD +∆V

VSEG ON

Segment Outputs (SA1 ∼ SA4)

During

VDD -∆V

VDD

V

VSEG OFF

BP - Time

1/3VDD -∆V

1/3VDD +∆V

Internal Oscillator Frequency

15

80

kHz

Frame Time (Int. Osc.

÷ 192)

2.4

12.8

ms

1/TSCAN

Scan Frequency

39

208

Hz

SK Clock Frequency

4

250

kHz

SK Width

1.7

µs

tSETUP

DI Data Stup

1.0

µs

tHOLD

DI Data Hold

100

ns

tSETUP

CS

1.0

µs

tHOLD

1.0

Output Loading Capacitance

100

pF

Note 1: Power supply current as measured in stand-alone mode with all outputs open and all inputs at VDD.

Note 2:

∆V - 0.05V

DD.

2

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