ROHM RCM1990U-A Technical data

查询RCM1990U-A供应商

RCM1990U-A

Liquid crystal displays

16×16 dots large-sized
liquid crystal display unit

RCM1990U-A

Thanks to the high contrast and wide viewing angle of the RCM1990U-A, which is provided by its unique design
technology, this module brings forth new applications in brand new LCD fields. ROHM large-sized LCD units are perfect
displays for information or sign boards. As a media for informational display, large-sized LCD units must possess high
visibility, wide viewing angles, and other such superior qualities. ROHM large-sized LCDs boast an excellent track record
and possess guaranteed functionality for assured satisfaction in a variety of situations.

zApplica tions

Public displays such as airport displays, train station displays, information boards, and billboards.

zFeatures

1) Wide viewing angle, high contrast, and fast response.

2) Compact and light weight for easy assembly.

3) Low power consumption.

zExternal dimensions (Unit : mm)

1.10

±0.101.10±0.1056.00±0.301.0Max.

2.65±0.30

(40.5)(R3.20)

1.00±0.30 2.70±0.50

61.00±0.30

57.50±0.30(3.50)

36.75Min.35.00±0.50

23.75Min.

33.75Min.

(8.00)

4.00±0.3027.00±0.30

2.00Max.

20.75Min.

(15.00)

(4.00)

81 81

CN 2

±0.30

23.00

54.00Min.0.3Max.

50.97

±0.302.515±0.30

CN 1

46.00±0.50 C2.0

2.00Max.

2.50±0.30

54.00Min.
(64.70)

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Liquid crystal displays

zBlock diagram

RCM1990U-A

zPin functions

Upper board

Input (CN3)

Pin No.

1
2
3
4
5
6
7
8

Output (CN4)

FLM

VO

DD

V

M
CL1
CL2

D

O

GND

OUTPUT

Symbol

FLM

VO
V

DD

M

CL1
CL2

DI

GND

IN/OUT

IN

−

−

IN
IN
IN
IN

−

64 output

driver IC

LCD

64 output

driver IC

COM.2

COM.1

COM

Generator circuit

Function
Frame start signal
Liquid crystal drive power supply
5 volts
AC conversion signal for liquid crystal drive output
Data latch signal, displays at rise / fall edge
Shift register shift signal, reads data at rise / fall
Display data signal (1 : On, 0 : Off)
Ground potential

FLM
VO

DD

V
M
CL1
CL2
DI
GND

INPUT

Pin No.

Symbol

1
2
3
4
5
6
7
8

FLM

VO
V

M

CL1
CL2

DI

GND

IN/OUT

OUT

DD

OUT
OUT
OUT
OUT

Frame start signal
Liquid crystal drive power supply

−

5 Volts

−

AC conversion signal
Data latch signal
Shift register shift signal
Display data signal
Ground potential

−

Function

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Liquid crystal displays

zAbsolute maximum ratings (Ta=25°C)

RCM1990U-A

Parameter

Power supply

voltage

Logic circuit

LCD drive

Input voltage
Operating temperature
Storage temperature

Symbol

V

DD

VDD-V

V

IN

T

opr

T

stg

EE

zElectrical characteristics (Ta=25°C, V

Parameter
High level input voltage
Low level input voltage
High level output voltage
Low level output voltage
Recommended LCD drive voltage
Current dissipation

Symbol

IH

V

V

IL

V

OH

V

OL

V

LCD

I

DD

zAC characteristics (Ta=25°C, V

Parameter
Shift frequency
High level lock width
Low level lock width
Data setup time
Clock setup time 1
Clock setup time 2
Data hold time
FLM setup time
FLM hold time
Clock rise / fall time
Output delay time
AC conversion signal

DD=5.0)

Limits

−0.3 to +7.0

−0.3 to +7.0

−0.3 to V

DD

+0.3

0 to +50

−10 to +60

DD=5.0V±0.25V)

Min.

3.5

−

4.6

−

−

−

Symbol

Applicable terminal

fCL

tCWH

CL1, CL2

tCWL

tSU
tSL
tLS

tDH
tFDS
tFDH

tct

CL1, CL2

tpd

fM

Typ.

CL2

CL2

DI
CL2
CL1

DI
FLM
FLM

DO

M

5.0

1.0

Unit

V
V
V

°C
°C

Max.

−

−

−

−

−

1.5

−

0.4

−

3.0

Min.

−

470
470
120
220
220
120
120
120

−

−

−

Unit

V
V
V
V
V

mA

Typ.

−

−

−

−

−

−

−

−

−

−

−

70

Conditions

IOH=−0.4mA

OH

=+0.4mA

I
Ta=25°C
f

CL

=1MHz, fM=70Hz

Max.

1

−

−

−

−

−

−

−

−

50

250

−

Unit

MHz

ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Hz

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