ROHM RCM2228R-A, RCM2228R-B Technical data

查询RCM2228R供应商

RCM2228R-A / B

Liquid Crystal Displays

16 characters × 2 lines COG module

RCM2228R-A / B

The RCM2228R-A / B is a reflective TN type liquid crystal module with a built-in controller / driver LSI and a display
capacity of 16 characters × 2 lines.

zApplic ations
Printers, Copiers, Facsimiles, etc

zFeatures
(1) 5×7 dot character matrix w ith cursor .
(2) Interfaces with 4-bit MPUs.
(3) Displays up to 237 characters and special symbols.
(4) Custom character patterns are displayed with the character RAM.
(5) Abundant instruction set including clear display , cursor on/off, and character blinking.
(6) Compact and lightweight for easy assembly to the host instrument.
(7) Operable on single 5V power supply .
(8) Low power consumption.

zExternal dimensions (Unit : mm) (View ing direction : 6 : 00)

±5°

7.0MAX

0.7±0.7 0.7±0.7

(0.5)

6.0MAX

2

0.7±0.70.7±0.7

1

No.1

50.0±0.3

41.9±0.2

48.0MIN.

(PITCH1.8×9)16.2±0.3

No.10

Over-coating regin

10.0MAX.

24.0MIN.

9.4±0.2 12.3±0.3

6:00

Viewing direction

10.0±0.5

1.5MAX

0.7±0.70.7±0.7
(0.3)

8.7±0.7

Shield tape

0.7±0.7

2.7±0.3

1.1±0.11.1±0.1

±5°

4.0MAX

26.0±0.3

4.350.7

22.0MAX.

25.0MAX.

0.39

0.5

0.05

1.0MAX.

0.3MAX.

9.0MIN.

12.0MIN.

2.0MAX.

4.05±0.3

12.4±0.3

8.0±0.3

(18.0)

2.15 0.5

0.05

Dot de tail

1/7

RCM2228R-A / B

Liquid Crystal Displays

zBlock diagram

V

R

V

RSR

/

W

ED

~

B
4

SEG1~80

V

D
B

7

V

D

S

0

D

S

zPin assignments

Symbol SymbolPin No.
1
2

RS

R / W
3
4
5

DB4
DB5

Pin No.

E

10 V

zPower supply example

COM
9~16

6 DB6
7 DB7
8V
9

LCD MODULE

SS

V

DD

0

V

DD

V

0

V

SS

16character×2lines

VDD−V

0

COM

1~8

DD

V

V

R

VDD−V0 : LCD drive voltage

zAbsolute maximum ratings (Ta=25°C)

Parameter Min.

Power voltage for logics
Power voltage for driving LCD

Input voltage
Operating temperature
Storage temperature

Symbol

V

DD

V

LCD

V

IN

Topr
Tstg

−0.3

−0.3

−0.3

0

−20

Fig.1

VDD+0.3

Max.

6.0

6.0

50
70

Unit

V
V
V

°C
°C

2/7

RCM2228R-A / B

Liquid Crystal Displays

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

Typ.

100
150

3.0

−

−

−

Max.

5.25

5.0

V

0.6

0.2V

1100

1.0

Unit

Conditions
V
V

DD

−

DD

V
V
V
V

RS, R / W, CS

IOH= −0.1mA
IOL=0.1mA

kHz

VDD=5.0V, fosc=270kHz check pattem

Max.

250
250

−

10

−

−

mA

Unit

ms
ms

−

deg
deg
deg

Conditions

φ=0

°,

θ=10

φ=0

°,

θ=10

°,

θ=10

φ=0

>

K 1.4, φ=0

>

K 1.4, θ=10

°
°
°

°

°

Parameter Symbol
Logic power voltage
LCD driving voltage
"H" input voltage
"L" input voltage
"H" output voltage
"L" output voltage

Clock frequency
Current consumption

V

DD

VLCD

VIH

VIL
VOH
VOL

fosc

IDD

zOptical characteristics (Ta=25°C)

When viewing from below

Parameter Symbol

Response time
Response time
Contrast ratio

Viewing angle

Typ.

5.0

−

DD

−

−

V

−

DD

−V

0.7V

VSS

0.75

Min.

4.75

3.0

−0.3

SS

540350

−

0.5

Min.

t

r

t

d

K

θ

1

θ

2

φ

−

−

−

−

40

±

30

(1) Definition θ and φ

θ

Viewing direction

12 o'clock

Y (φ=180°)

Fig.2

(3) Definition of contrast ratio "K"

Selected

100

Brightness (%)

0

Driving voltage

Fig.4

(2) Definition of viewing angles θ1 and θ2

Z (φ=0°)

2'

θ

2

θ

1'

θ

1

XX'

Y' (φ=180°)

Viewing direction 6 o'clock

1.4

Contrast ratio

θ

1

Viewing angle

Fig.3

θ

2

(4) Definition of optical response

K=B

2

/ B

1

B

2

Non-selected

B

1

90%

t

r

Selected condition

100%

Rise time Fall time

Fig.5

10%

t

d

3/7