RCM2228R-A Ver la hoja de datos (PDF) - ROHM Semiconductor

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RCM2228R-A

16 characters × 2 lines COG module

ROHM Semiconductor 

Liquid Crystal Displays

zElectrical characteristics (VDD=5.0V, Ta=25°C)

Parameter

Logic power voltage

LCD driving voltage

"H" input voltage

"L" input voltage

"H" output voltage

"L" output voltage

Clock frequency

Current consumption

Symbol

VDD

VLCD

VIH

VIL

VOH

VOL

fosc

IDD

Min.

4.75

3.0

0.7VDD

VSS−0.3

0.75VDD

VSS

350

−

Typ.

5.0

−

−

−

−

−

540

0.5

Max.

5.25

5.0

VDD

0.6

−

0.2VDD

1100

1.0

RCM2228R-A / B

Unit

Conditions

V

V

V

RS, R / W, CS

V

V

IOH= −0.1mA

V

IOL=0.1mA

kHz

mA

VDD=5.0V, fosc=270kHz check pattem

zOptical characteristics (Ta=25°C)

When viewing from below

Parameter

Response time

Response time

Contrast ratio

Viewing angle

Symbol

Min.

Typ.

Max.

Unit

Conditions

tr

−

100

250

ms

φ=0°, θ=10°

td

−

150

250

ms

φ=0°, θ=10°

K

−

3.0

−

−

φ=0°, θ=10°

θ1

−

−

10

deg

K>1.4, φ=0°

θ2

40

−

−

deg

φ

±30

−

−

deg

K>1.4, θ=10°

(1) Definition θ and φ

(2) Definition of viewing angles θ1 and θ2

Viewing direction

12 o'clock

Y (φ=180°)

X'

Z (φ=0°)

θ2'

θ2

θ1' θ1

1.4

Fig.2

X

Y' (φ=180°)

Viewing direction 6 o'clock

θ1

θ2

Viewing angle

Fig.3

(3) Definition of contrast ratio "K"

(4) Definition of optical response

Selected

K=B2 / B1

100

B2

Non-selected

B1

0

Driving voltage

Fig.4

Selected condition

tr

Rise time

Fig.5

td

Fall time

3/7

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