RCM2234R-A datasheet(3/9 Pages) ROHM

Part #	RCM2234R-A

Description	20 characters x 2 lines COG module

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Manufacturer	ROHM [Rohm]

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RCM2234R-A / B

Liquid Crystal Displays

3/8

Electrical characteristics (VDD=5.0V, Ta=25

°C)

Parameter

Logic power voltage

LCD power voltage

H input voltage (1)

L input voltage (2)

H output voltage

L output voltage

LCD driving voltage

Symbol

VDD

VLCDI

VIH

VIL

VOH

VOL

fosc

VLCD

Min.

4.75

3.0

0.7VDD

VSS

0.8VDD

Typ.

5.0

−

Max.

5.25

5.0

VDD

0.7

0.2VDD

5.0

Unit

V

Conditions

IOH

= −100µA

IOL

=100µA

LCD drive resistance

−

325

kHz

250

175

3.0

Current consumption

IDD

700

1400

µA

Check pattern

−

Clock oscillation frequency

Terminal Name

E, RS, SEL1,

DB0 to DB7

VDD

Optical characteristics (Ta=25

°C)

(1) Viewing direction 6:00

Parameter

Response time

Contrast ratio

Viewing angle

Symbol

tr

td

K

θ1

θ2

φ

Min.

−

20

±30

Typ.

100

150

3

−

Max.

250

−

0

−

Unit

ms

−

deg

Test Conditions

θ=10

°, φ=0°

K 1.2

φ=0

°

K 1.2

θ=20

°

θ=10

°, φ=0°

θ=10

°, φ=0°

(2) Viewing direction 12:00

Parameter

Symbol

tr

td

K

θ1'

θ2'

φ

Min.

−

20

150 to 210

Typ.

100

150

3

−

Max.

250

−

0

−

Unit

ms

−

deg

Test Conditions

θ'=10

°, φ=180°

K

1.2

φ=180

°

K

1.2

θ'=20

°

θ'=10

°, φ=180°

θ'=10

°, φ=180°

Response time

Contrast ratio

Viewing angle

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