ROHM RCM1277U-A Datasheet

RCM1277U-A

Liquid crystal displays

16 x 16 dots transmissive large-sized
liquid crystal display unit

RCM1277U-A

Thanks to the high contrast and wide viewing angle of the RCM1277U-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.

Applications

!

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

Features

!

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

2) Compact and light weight for easy
assembly.

3) Supports negative or positive display.

4) Low power consumption.

External dimensions

!

1Max.

0.3Max.

2.515±0.3
2Max.

20.75Min.

23.75Min.

33.75Max.

36.75Max.

0.3

0.3

±

±

61

57.5

0.3

(8)

±

(3.5)

(15.5)(4)

0.3 4

0.5

±

±

27

35

CN2 CN1

8181

23±0.3

Please specify the viewing direction

(Units : mm)

56±0.3
54Min.

50.97±0.1

2 to 2.8 dia.

46±0.5

2Max.

1.1±0.11.1±0.1

]

64.7

[

Viewing

direction

6:00

[

[R3.2]

]

2.52

30.2

Dots details

2.65±0.3

0.71
C0.1

[40.5]

0.51.0

±

2.7

0.3

±

0.351

±

2.5

0.2

±

54Min.

Liquid crystal displays

Block diagram

!

LCD

COM. 1

RCM1277U-A

COM. 2

Pin functions

!

64 output

driver IC

FLM

V

DD

V

O

M
CL1
CL2

DO

GND

OUTPUT INPUT

64 output

driver IC

(1) Input (CN1)

Pin no. Symbol Function

1
2

FLM

V
3V
4MIN
5 CL1 IN
6 CL2 IN
7DIIN
8 GND -

IN / OUT

IN

O

DD

Frame start code

-

Liquid crystal drive power supply

-

Applies 5 V
Liquid crystal drive output AC conversion signal
Data latch signal (displays at rising edge)
Shift register shift signal (reads data at falling edge)
Display data signal (1: On, 0: Off)
Ground

COM waveform
generator circuit

FLM
V

DD

V

O

M
CL1
CL2
DI
GND

(2) Output (CN2)

Pin no. Symbol

1
2
3 CL2 OUT
4 CL1 OUT
5 M OUT
6V
7V
8 FLM OUT

GND

DO

DD

O

IN / OUT

-

OUT

-

-

Function
Ground
Display data code
Shift lock signal
Data latch signal
AC conversion signal
5 V
Liquid crystal drive power supply
Frame start signal

Liquid crystal displays

Absolute maximum ratings

!

Parameter

Logic power supply voltage
LCD drive voltage
Input voltage
Operating temperature
Storage temperature

Electrical characteristics

!

Parameter

Input high level voltage
Input low level voltage
Output high level voltage
Output low level voltage
Power supply current

AC characteristics

!

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
Clock rise / fall time
FLM setup time
FLM hold time
Output delay time
AC conversion signal

(VDD = 5.0V ± 0.25V, Ta = 25°C)

Symbol Min. Typ. Max. Unit Conditions

(VDD = 5.0V ± GND = 0V, Ta = 25°C)

(Ta = 25°C)

Symbol Limics Unit

V

V

V

IH

V

IL

OH

V
V

OL

I

DD

DD

DD-VO

IN

V
Topr
Tstg

Symbol

f

CL

t

CWH

CWL

t

t

SU

t

SL

t

LS

t

DH

t

t

FDS

t

FDH

t

pd

f

3.5

4.6

ct

M

−0.3~+7.0 V

−0.3~+7.0

DD

−0.3~V
0~+50

−10~+60

-

-

-

-

-

-

-

-

Applicable terminal

+0.3

-

1.5

-

0.4

6.0

CL2

CL1, CL2

CL2

DI

CL2

CL1

DI

CL1, CL2

FLM
FLM

DO

M

V
V
V
V

mA

V
V

°C
°C

OH

−I
I

OL

= +0.4mA

CL

= 1MHz, fM = 70Hz

f

= −0.4mA

Min.

470
470
120

220
220
120

120
120

RCM1277U-A

Max.

Typ.

1

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

50

-

-

-

-

-

-70250-ns

-

Unit

MHz

ns
ns
ns
ns
ns
ns
ns
ns
ns

Hz

Timing characteristics

!

CL2

DI

DO

CL1

FLM

V

V

IH

V

IL

t

t

ct

CWH

V

IH

t

SU

V

IL

t

pd

V

OH

V

OL

V

V

t

ct

V

IH

t

CWL

t

ct

IH

iL

Fig.1

t

DH

t

SL

t

CWH

t

FDS

IH

t

LS

t

ct

t

FDH