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MITSUMI
LCD Interface MM1323
LCD Interface
Monolithic IC MM1323
Outline
This IC was developed for interface with digital video equipment having an LCD monitor.
It can be used as interface for CPU, DSP and LCD drivers that output RGB signals after output polarity
inversion and γ correction processing.
It has a built-in post filter (5MHzLPF), 16.5dB amp and 20dB common amp.
Features
1. Built-in post filter 5MHz LPF
2. Built-in amp G
3. Adjustable white balance
4. Built-in common amp G
V=16.5dB
VCOM=20dB
Package
SSOP-24 (0.8mm pitch)
TSOP-24 (0.5mm pitch)
Applications
1. Navigation systems
2. Digital cameras
3. Pachinko games (with color TFT)
4. Videophones, conferencing systems
5. Other game equipment
Circuit Connection Diagram
RGB signal after polarity inversion and γ correction processing
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MITSUMI
Block Diagram
LCD Interface MM1323
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MITSUMI
LCD Interface MM1323
Pin Description
Pin no. Pin name Function Internal equivalent circuit diagram
1 V
2 VCC1
3 frpv IN
4 RW/B CT1 White balance control
5 BW/B CT1
CC2
6 R IN RGB input
7 B IN
8 B IN
9 NC
10 DC CONT IN DC control input
11 COMMON IN Common input
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MITSUMI
LCD Interface MM1323
Pin no. Pin name Function Internal equivalent circuit diagram
12 VEE
13 DC OUT DC output
14 Vee
15 COMMON OUT
16 VCC2
17 DC DETECT Output detection
18 GND
19
21 DC DETECT Output detection
23
20 B OUT
22 G OUT RGB output
24 R OUT
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MITSUMI
LCD Interface MM1323
Electrical Characteristics
Item Symbol Measurement conditions
VCC1 4.8 4.9 5.0 V
Operating power supply voltage
Consumption current I
RGB
Voltage gain G
Voltage gain difference
between channels
Output dynamic range V
Output center voltage V
Load fluctuation V
Frequency characteristic F
W/B
VCC2 6.0 6.5 7.0 V
EE
V
I
CC1 No load 11.5 15.0 mA
CC2 No load 8.5 11.0 mA
EE No load 7.0 9.0 mA
I
V G 16.0 16.5 17.0 dB
G
VCH
ODR VP-P
C G 2.3 2.5 2.7 V
C
(Except where noted otherwise, Ta=25°C, VCC1=4.9V, VCC2=6.5V, VEE=-6.5V all SW ; A)
Min. Typ. Max.
-
7.0-6.5-6.0 V
SW1, SW2, SW3=B V1, V2=1.5V
TP5, TP6, TP7=0.6V
P-P, 100kHz sine wave
Measure sine wave ratio between input signal and TP12, 13 and 14
Measure voltage gain difference between each RGB
channel.
SW1, SW2, SW3=B V1, V2=1.5V
TP5, TP6, TP7=0.6V
P-P 100kHz sine wave
Vary input signal amplitude and measure TP12, 13
and 14 amplitude at the point where TP12, 13 and
14 signals start to saturate.
Input a 0.6V
P-P, 7.86kHz rectangular wave to TP5, 6
and 7, and measure TP12, 13 and 14 center voltage.
Measure TP12, 13 and 14 DC voltage fluctuation
OL G
when TP12, 13 and 14 load current is varied from
0 ±6mA.
SW1, SW2, SW3=B V1, V2=1.5V
TP5, TP6, TP7=0.6V
P-P sweep signal
For 100kHz, measure frequency when attenuated
-
3dB relative to TP12, 13 and 14 signals.
R 16.0 16.5 17.0
B 16.0 16.5 17.0
R-G-0.5 0.0 0.5
R-B-0.5 0.0 0.5 dB
G-B-0.5 0.0 0.5
R 4.25
G 4.25
B 4.25
R 2.3 2.5 2.7
B 2.3 2.5 2.7
-
0.2 0 0.2
R
-
0.2 0 0.2 V
B
-
0.2 0 0.2
R 4.0 5.0
G 4.0 5.0
B 4.0 5.0
Units
Common-mode
output amplitude
Negative-phase
output amplitude
W/BO1
V
W/BO2
V
frpv input
threshold voltage
Output center voltage V
COMMON
COMMON voltage gain G
COMMON output
center voltage
V
COMMON load fluctuation V
Center DC adjustment
Output voltage L V
Output voltage H V
TP1=5.0V
P-P 7.86kHz rectangular wave
Confirm that TP12 and 14 signals are in phase with
TP1, then measure amplitude.
TP1=5.0V
P-P 7.86kHz rectangular wave
Confirm that TP12 and 14 signals are reverse phase
from TP1, then measure amplitude.
R 1.5
B 1.5
R 1.5
B 1.5
V
P-P
P-P
V
Measure TP18 voltage, then impress that voltage on
TP18. Given V1=0V, add DC voltage to TP1. Raise
T 1.0 1.7 2.4 V
V
gradually from 0V and measure TP1 voltage when
TP14 voltage goes over 2.5V.
TP1=5.0V
Adjust V1 and V2 within 0~1.5V (in
phase) and set TP12 and 14 amplitude at
C V
1.5V. Measure TP12 and TP14 center
voltage.
Measure in the same way for V1 and V2
adjusted within 1.5~3.0V (reverse phase).
SW4=B TP9=1.0V
VCOM 19.5 20.0 20.5 dB
Measure ratio of input signal and TP11 sine wave.
SW4=B TP9=1.0V
CO
Measure TP11 center voltage.
Measure TP11 DC voltage fluctuation when TP11 load
OLC
current is varied from 0 ±100mA.
OL SW5=B, V3=0V, Measure TP10 DC voltage.
OH SW5=B, V3=3V, Measure TP10 DC voltage. 3.7 4.0 4.3 V
P-P 7.86kHz rectangular wave
P-P 100kHz sine wave
P-P 7.86kHz rectangular wave
Common-
mode
Negative-
phase
R 2.3 2.5 2.7
B 2.3 2.5 2.7
R 2.3 2.5 2.7
B 2.3 2.5 2.7
-
0.2 0 0.2 V
-
0.5 0 0.5 V
-
1.3-1.0-0.7 V
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MITSUMI
LCD Interface MM1323
Absolute Maximum Ratings
Item Symbol Ratings Units
Storage temperature T
Operating temperature T
Power supply voltage
Allowable loss Pd 650 mW
Measuring Circuit
(Ta=25°C)
STG
OPR
V
CC
-
GND 8 V
V
EE
-
GND
-
40~+125 °C
-
20~+75 °C
-
8V
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