MITSUMI MM1323

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.
2.
3.
4.
Built-in post filter 5MHz LPF
Built-in amp GV=16.5dB
Adjustable white balance
Built-in common amp GVCOM=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
MITSUMI
Block Diagram
LCD Interface MM1323
LCD Interface MM1323
MITSUMI
Pin Description
Pin no.
Pin name
Function
1
VCC2
2
VCC1
3
frpv IN
4
RW/B CT1
5
BW/B CT1
6
R IN
7
B IN
8
B IN
9
NC
10
DC CONT IN
DC control input
11
COMMON IN
Common input
White balance control
RGB input
Internal equivalent circuit diagram
LCD Interface MM1323
MITSUMI
Pin no.
Pin name
12
VEE
13
DC OUT
14
Vee
15
COMMON OUT
16
VCC2
17
DC DETECT
18
GND
Function
DC output
Output detection
19
21
DC DETECT
Output detection
23
20
B OUT
22
G OUT
24
R OUT
RGB output
Internal equivalent circuit diagram
LCD Interface MM1323
MITSUMI
Electrical Characteristics
Item
(Except where noted otherwise, Ta=25°C, VCC1=4.9V, VCC2=6.5V, VEE=-6.5V all SW ; A)
Symbol
VCC1
Operating power supply voltage VCC2
VEE
ICC1
Consumption current
ICC2
IEE
RGB
Voltage gain
GV
Voltage gain difference
between channels
GVCH
Output dynamic range
Output center voltage
Load fluctuation
Frequency characteristic
Measurement conditions
Min.
4.8
6.0
-7.0
No load
No load
No load
Typ.
4.9
6.5
-6.5
11.5
8.5
7.0
Measure voltage gain difference between each RGB
R-B -0.5 0.0
channel.
G-B -0.5 0.0
VC
Units
V
V
V
mA
mA
mA
R 16.0 16.5 17.0
SW1, SW2, SW3=B V1, V2=1.5V
G 16.0 16.5 17.0 dB
TP5, TP6, TP7=0.6VP-P, 100kHz sine wave
Measure sine wave ratio between input signal and TP12, 13 and 14 B 16.0 16.5 17.0
R-G -0.5 0.0
VODR
Max.
5.0
7.0
-6.0
15.0
11.0
9.0
SW1, SW2, SW3=B V1, V2=1.5V
TP5, TP6, TP7=0.6VP-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 0.6VP-P, 7.86kHz rectangular wave to TP5, 6
and 7, and measure TP12, 13 and 14 center voltage.
0.5
0.5
0.5
dB
R 4.25
VP-P
G 4.25
B
R
G
B
R
G
B
4.25
2.3 2.5
2.3 2.5
2.3 2.5
-0.2 0
-0.2 0
-0.2 0
VOL
Measure TP12, 13 and 14 DC voltage fluctuation
when TP12, 13 and 14 load current is varied from
0 ±6mA.
R
4.0
5.0
FC
SW1, SW2, SW3=B V1, V2=1.5V
TP5, TP6, TP7=0.6VP-P sweep signal
For 100kHz, measure frequency when attenuated
-3dB relative to TP12, 13 and 14 signals.
G
4.0
5.0
B
4.0
5.0
TP1=5.0VP-P 7.86kHz rectangular wave
R
1.5
TP1, then measure amplitude.
B
1.5
TP1=5.0VP-P 7.86kHz rectangular wave
R
1.5
B
1.5
2.7
2.7
2.7
0.2
0.2
0.2
V
V
W/B
Common-mode
output amplitude
VW/BO1 Confirm that TP12 and 14 signals are in phase with
Negative-phase
output amplitude
VW/BO2 Confirm that TP12 and 14 signals are reverse phase
frpv input
threshold voltage
VT
Measure TP18 voltage, then impress that voltage on
TP18. Given V1=0V, add DC voltage to TP1. Raise
gradually from 0V and measure TP1 voltage when
TP14 voltage goes over 2.5V.
VC
R
TP1=5.0VP-P 7.86kHz rectangular wave
CommonAdjust V1 and V2 within 0~1.5V (in
mode
B
phase) and set TP12 and 14 amplitude at
1.5V. Measure TP12 and TP14 center
R
voltage.
NegativeMeasure in the same way for V1 and V2
phase
B
adjusted within 1.5~3.0V (reverse phase).
Output center voltage
from TP1, then measure amplitude.
VP-P
VP-P
1.0
1.7
2.4
2.3
2.5
2.7
2.3
2.5
2.7
2.3
2.5
2.7
2.3
2.5
2.7
V
V
COMMON
COMMON voltage gain
GVCOM
COMMON output
center voltage
VCO
COMMON load fluctuation
Center DC adjustment
Output voltage L
Output voltage H
VOLC
VOL
VOH
SW4=B TP9=1.0VP-P 100kHz sine wave
Measure ratio of input signal and TP11 sine wave.
SW4=B TP9=1.0VP-P 7.86kHz rectangular wave
Measure TP11 center voltage.
Measure TP11 DC voltage fluctuation when TP11 load
current is varied from 0 ±100mA.
SW5=B, V3=0V, Measure TP10 DC voltage.
SW5=B, V3=3V, Measure TP10 DC voltage.
19.5 20.0 20.5 dB
-0.2
0
0.2
V
-0.5
0
0.5
V
-1.3 -1.0 -0.7
3.7 4.0 4.3
V
V
LCD Interface MM1323
MITSUMI
Absolute Maximum Ratings
(Ta=25°C)
Item
Symbol
Ratings
Units
Storage temperature
TSTG
-40~+125
°C
Operating temperature
TOPR
-20~+75
°C
VCC-GND
8
V
VEE-GND
-8
V
Pd
650
mW
Power supply voltage
Allowable loss
Measuring Circuit