MITSMI MM1288CQ Datasheet

MITSUMI

TFT Liquid Crystal Interface

Monolithic IC MM1288CQ

Outline

TFT Liquid Crystal Interface MM1288CQ

This IC was developed as an interface IC for video equipment having a small monitor. This IC performs
correction and polarity identification to convert RGB signals into TFT liquid crystal RGB signals. A common
inversion circuit and sync separation circuit are built-in.

Features

1. Power supply voltage +13V, 0V or +5V, -8V

2. Built-in polarity ID circuit

3. Built-in γ correction circuit

4. Common inversion circuit built-in

5. 2 input switch built-in

6. Built-in contrast adjustment circuit

7. Built-in sync separation circuit

Package

QFP-48A

Applications

1. Navigation systems

2. Pachinko games (models with color TFT)

3. Videophones, conferencing systems

4. Game equipment

5. Others

γ

MITSUMI

Block Diagram

TFT Liquid Crystal Interface MM1288CQ

Pin Description

Pin no.

1, 6

11, 12
13, 23 NC
24, 25
36, 37
38, 48

2, 3
4, 7 RGB IN
8, 9

Pin name Function

5 GND GND pin

10

SYNC SEP IN

RGB input

Sync separation

input

Internal equivalent

circuit diagram

Pin no.

17, 18 CLAMP

Pin name Function

14

SYNC

OUT

15

16 SYNC IN

44 (RGB)

TIME

CONSTANT

Internal equivalent

circuit diagram

Sync output

Sync integration

Sync input

Clamp

MITSUMI

TFT Liquid Crystal Interface MM1288CQ

Pin no.

19, 45

21, 42

Pin name Function

CONTRAST

43

CONTRAST

20 VCC1

BRIGHT

COMMON

22

DC VOLT

SUB

SUB

Internal equivalent

Subcontrast

Contrast

Positive polarity

power supply pin 1

Sub bright

Common
operating

point adjustment

circuit diagram

Pin no.

Pin name Function

OUT DC V

32

DETECT detection

34 GAMMA1

CENTER DC

35

Internal equivalent

circuit diagram

G output

Gamma

correction 1

Adjust center

voltage

26

27

28

29, 31

33

COMMON

INV inversion

COMMON

OUT output

COMMON

SWING

RGB OUT RGB output

Common

Common

Common

amplitude

adjustment

39 GAMMA2

40 INV

41

46 BRIGHT Bright

VCC2

Gamma

correction 2

Inversion

Positive polarity

power supply pin 2

30 VEE

47 SW Switch

Negative

polarity pin

MITSUMI

RGB input

Inversion pulse

Primary color

output

COMMON output

Note : GAMMA1, GAMMA2 (Pins 34, 39)

DC voltage applied to these pins sets γ correction DC voltage gain change point.

TFT Liquid Crystal Interface MM1288CQ

γ1

γ correction

Output is given characteristics as shown at left
according to LCD panel characteristics.

Output

γ2

Input

Pins 34 and 39 adjust the slope change position.

INV (40PIN)

The primary color output (pins 29, 31, 33) and COMMON output (pin 27) are inverted according to the
inversion pulse input to this pin. When COMMON INV (pin 26) has Vcc2 potential, the relationships between
the input, output and inversion pulse are as shown in the figure below.

Absolute Maximum Ratings

Item Symbol Ratings Units

Storage temperature T

Operating temperature T

Power supply voltage V

Allowable loss 1 Pd 1 500 mW

Allowable loss 2 Pd 2 1000

47mm 75mm 0.8mm printed circuit board (glass epoxy) board mounted.

*

(Ta=25°C)

V

STG

OPR

CC1

-

GND 6 V

CC2

-

VEE 15 V

GND

-

VEE 10 V

-

40~+125 °C

-

20~+85 °C

*

mW