Mitsubishi M52742ASP Datasheet

MITSUBISHI ICs (Monitor)

PRELIMINARY

Notice:This is not a final specification.
Some parametric limits are subject to change.

DESCRIPTION

M52742ASP is semiconductor integrated circuit for CRT display
monitor.
It includes OSD blanking, OSD mixing, retrace blanking, wide band
amplifer, brightness control, uniformity function.
Main/sub contrast and OSD adjust function can be controlled by I2C
bus.

FEATURES

• Frequency band width: RGB.............................200MHz (at -3dB)

Input :RGB.............................................................0.7VP-P (typ.)

OSD..........................................3VP-P minimum (positive)

BLK (for OSD)..........................3VP-P minimum (positive)

Retrace BLK.............................3VP-P minimum (positive)

Output :RGB..........................................................5.5VP-P (max.)

OSD..............................................................5VP-P (max.)

• Main contrast and sub contrast can be controlled by I

• Include internal and external pedestal clamp circuit

STRUCTURE

Bipolar silicon monolithic IC

APPLICATION

CRT display monitor

BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR

OSD..............................................80MHz

2

C bus.

M52742ASP

PIN CONFIGURATION (TOP VIEW)

OSD BLK IN

INPUT(R)

VCC1(R)

OSD IN(R)

GND 1(R)
INPUT(G)

INPUT(SOG)

VCC1(G)

OSD IN(G)

GND 1(G)

INPUT(B)

VCC1(B)

OSD IN(B)

GND 1(B)

ABL IN

UNIFORMITY IN

VCC=5V

SOG SEP OUT

1
2

3
4

7
8

13
14
15 22
16 21

17
18 19

36

VCC2
OUTPUT(R)

35

EXT FEED BACK(R)

34

GND2

33
325

OUTPUT(G)

316

EXT FEED BACK(G)
MAIN BRIGHTNESS

30

M52742ASP

OUTPUT(B)

29

EXT FEED BACK(B)

289
2710

RETRACE BLK IN

2611

D/A OUT1

2512

D/A OUT2
D/A OUT3

24

D/A OUT4

23

GND(5V)
SDA

20

SCL
CLAMP PULSE IN

RECOMMENDED OPERATING CONDITION

Supply voltage range......................11.5 to 12.5V (V3, V8, V12, V36)

4.5 to 5.5V (V17)

Rated supply voltage..................................12.0V (V3, V8, V12, V36)

5.0V (V17)

MAJOR SPECIFICATION

Bus controlled 3ch video pre-amp with OSD mixing function and
retrace blanking function

Outline 36P4E

1

MITSUBISHI ICs (Monitor)

PRELIMINARY

Notice:This is not a final specification.

Some parametric limits are subject to change.

BLOCK DIAGRAM

OUTPUT (R)
35

27

RETRACE BLK IN

RETRACE

BLANKING

30

MAIN BRIGHTNESS

AMP

M52742ASP

BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR

Vcc 5V

EXT FEED BACK (R)
34

CLAMP

F/B

OUTPUT (G)
32

RETRACE

AMP

BLANKING

EXT FEED BACK (G)

31

F/B

CLAMP

OUTPUT (B)
29

RETRACE

AMP

BLANKING

EXT FEED BACK (B)
28

F/B

CLAMP

(DIGITAL)

SDA

17

21

BUS

DAC

SCL
20

I/F

GND(5V)
22

26
2524

DAC OUTPUT

23

FOR CUT-OFF adj

4bit

OSD

LEVEL

B SUB CONT 8bit

R SUB CONT 8bit

OSD MIX

MAIN

CONTRAST

SUB

CONTRAST

CLAMP

2

4

(8bit)

SUB CONT

3

5

OSD MIX

MAIN

CONTRAST

SUB

CONTRAST

CLAMP

9

6

(8bit)

SUB CONT

8

10

OSD MIX

8bit

(8bit)

SUB CONT

14

12

Main

CONTRAST

15

MAIN

CONTRAST

SUB

CONTRAST

CLAMP

11

13

G SUB CONT 8bit

Sync On

GreenSep

7

1

OSD BLK IN

33

GND2

36

Vcc2=12V

1619

IN

UNIFORMITY

IN

CLAMP PULSE

18

INPUT (R)

OSD IN (R)

Vcc1 (R) 12V

GND 1(R)

INPUT (G)

OSD IN (G)

Vcc1 (G) 12V

GND 1(G)

INPUT (B)

OSD IN (B)

Vcc1 (B) 12V

GND 1(B)

INPUT (SOG)

CONTRAST (ABL) IN

SOG SEP OUT

2

MITSUBISHI ICs (Monitor)

PRELIMINARY

Notice:This is not a final specification.

Some parametric limits are subject to change.

ABSOLUTE MAXIMUM RATINGS (Ta=25°C)

Symbol Parameter Ratings Unit
VCC12 Supply voltage (pins 3,8,12,36) 13.0
VCC5 Supply voltage (pin 17) 6.0
Pd Power dissipation 2403 mW
Topr Ambient temperature -20 to +75 C
Tstg Storage temperature -40 to +150 C
Vopr12 Recommended supply 12 12.0 V
Vopr5 5.0 V

Recommended supply 5

ELECTRICAL CHARACTERISTICS (VCC=12V, 5V, Ta=25°C, unless otherwise noted)

Symbol Parameter

ICC1

ICC2

Vomax

Vimax

Gv

∆Gv

VC1

∆VC1

VC2

∆VC2

VC3

∆VC3

VSC1

∆VSC1

VSC2

∆VSC2

VSC3

∆VSC3

Circuit
current1

Circuit
current2

Output
dynamic range

Maximum
input

Maximum
gain

Relative max­imum gain

Main contrast
control
characteristics1

Main contrast
control relative
characteristics1

Main contrast
control
characteristics2

Main contrast
control relative
characteristics2

Main contrast
control
characteristics3

Main contrast
control relative
characteristics3

Sub contrast
control
characteristics1

Sub contrast
control relative
characteristics1

Sub contrast

control
characteristics2

Sub contrast
control relative
characteristics2

Sub contrast
control
characteristics3

Sub contrast
control relative
characteristics3

BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR

V

V

°
°

Test

point

2,6,11

(s)

RGB

in

OSD

BLK

IA a a a

IB a a a

b

OUT

SG2

b

IN

SG2

OUT

Variable

b

OUT

SG1

4,9,13

1

OSD

a a

a a

a a

Input

in

19

CP in27ReT

b

SG5

b

SG5

b

SG5

b

SG5

b

SG5

7

SOG

in

BLK

a a a 4.0 5.0

a a a 4.0 5.0 - 18 25 mA

a a a

a a a 2.0 5.0

a a a 2.0 5.0

- - - - - - - - - - - 0.8 1.0 1.2 -

OUT

b

SG1

a a

b

a a a 2.0 5.0

SG5

- - - - - - - - - - - 0.8 1.0 1.2 -

OUT

b

SG1

a a

b

a a a 2.0 5.0

SG5

- - - - - - - - - - - 0.8 1.0 1.2 -

OUT

b

SG1

a a

b

a a a 2.0 5.0

SG5

- - - - - - - - - - - 0.8 1.0 1.2 -

OUT

b

SG1

a a

b

a a a 2.0 5.0

SG5

- - - - - - - - - - - - - - 0.8 1.0 1.2 -

OUT

b

SG1

a a

b

a a a 2.0 5.0

SG5

- - - - - - - - - - - - - - 0.8 1.0 1.2 -

OUT

b

SG1

a a

b

a a a 2.0 5.0

SG5

- - - - - - - - - - - - - - 0.8 1.0 1.2 -

16

UNI

in

CTL

voltage

00H

15

30

Bri­ght

Vari
able

Main

ABL

cont

FFH
255

5.0 6.0 8.0 - VP-P

64H
100

FFH
255

C8H

200

64H
100

14H

20

FFH

255

FFH

255

FFH

255

BUS CTL (H) Limits

01H

02H

03H

Sub
cont

FFH

C8H

64H

255

200

100

2

04H

Sub

OSD

cont

3

FFH

00H000H0FFH

255

C8H
200

64H
100

20

Sub
cont

1

FFH
255

C8H

200

64H
100

14H2014H2014H

M52742ASP

05H

06H

07H

BLK

D/A

Adj

D/A

Adj

OUT

OUT

1

2

FFH

255

255

08H

OUT

FFH
255

0BH

09H

INT

D/A

D/A

EXT

Min. Typ. Max.

OUT

3

4

FFH

00H

- 126 146 mA

255

0

1.6 - - VP-P

16.5 17.7 19.4 dB

15.5 17.0 18.5 dB

9.5 11.0 12.5 dB

0.2 0.4 0.6

16.0 17.5 19.0 dB

12.0 13.5 15.0 dB

1.5 1.9 2.2

Unit

V

V

P-P

P-P

3

MITSUBISHI ICs (Monitor)

PRELIMINARY

Notice:This is not a final specification.

Some parametric limits are subject to change.

ELECTRICAL CHARACTERISTICS (cont.)

Symbol Parameter

VMSC

∆VMSC

ABL1

∆ABL1

ABL2

∆ABL2

VB1

∆VB1

VB2

∆VB2

VB3

∆VB3

FC1

∆FC1

FC1’

∆FC1’

FC2

∆FC2

C.T.1

C.T.1’

C.T.2

C.T.2’

C.T.3

C.T.3’

Main/sub
contrast control
characteristics

Main/sub contrast
control relative
characteristics

ABL control
characteristics1

ABL control
relative
characteristics1

ABL control
characteristics2

ABL control
relative
characteristics2

Brightness
control
characteristics1

Brightness
control relative
characteristics1

Brightness
control
characteristics2

Brightness
control relative
characteristics2

Brightness
control
characteristics3

Brightness
control relative
characteristics3

Frequency
characteristics1
(f=50MHz)

Frequency relative
characteristics1
(f=50MHz)

Frequency
characteristics1
(f=200MHz)

Frequency relative
characteristics1

(f=200MHz)

Frequency
characteristics2
(f=200MHz)

Frequency relative
characteristics2
(f=200MHz)

Crosstalk 1
(f=50MHz)

Crosstalk 1
(f=200MHz)

Crosstalk 2
(f=50MHz)

Crosstalk 2
(f=200MHz)

Crosstalk 3
(f=50MHz)

Crosstalk 3
(f=200MHz)

BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR

Test

point

2,6,11

(s)

OUT

RGB

in

b

SG1

OSD

BLK

- - - - - - - - - - - - - - 0.8 1.0 1.2 ­b

OUT

SG1

- - - - - - - - - - 0.8 1.0 1.2 ­b

OUT

SG1

- - - - - - - - - - 0.8 1.0 1.2 -

OUT a a a

- - - - - - - - - - -0.3 0 0.3 V

OUT a a a

- - - - - - - - - - -0.3 0 0.3 V

OUT a a a

- - - - - - - - - - -0.3 0 0.3 V

b

OUT

SG3

- - - - - - - - - - - -1.0 0 1.0 dB

b

OUT

SG3

- - - - - - - - -1.0 0 1.0 dB

b

OUT

SG3

- - - - - - - - - - -1.0 0 1.0 dB

2bSG3

OUT(29)

6a

OUT(32)

11a
2bSG3

OUT(29)

6a

OUT(32)

11a
2a

OUT(29)

6bSG3

OUT(35)

11a
2a

OUT(29)

6bSG3

OUT(35)

11a
2a

OUT(32)

6a

OUT(35)

11bSG3
2a

OUT(32)

6a

OUT(35)

11bSG3

4,9,13

1

OSD

a a

a a

a a

a a

a a

a a

a a

a a

a a

a a

a a

a a

Input

in

CP in27ReT

SG5

SG5

SG5

SG5

SG5

SG5

M52742ASP

CTL

voltage

19

b

b

b

b

b

b

a

5V

a

5V

a

5V

a

5V

a

5V

a

5V

a

5V

a

5V

a

5V

7

16

BLK

SOG

in

UNI

in

30

Bri­ght

a a a 2.0 5.0

a a a 2.0 4.0

a a a 2.0 2.0 2.6 3.1 3.6 VP-P

a a a 4.0 5.0 3.3 3.7 4.1 V

a a a 2.0 5.0 1.5 1.8 2.1 V

a a a 1.0 5.0 0.7 0.9 1.1 V

a a a

a a a

a a a

a a a

a a a

a a a

a a a

a a a

a a a

Vari
able

Vari
able

Vari
able

Vari
able

Vari
able

Vari
able

Vari
able

Vari
able

Vari
able

00H

15

Main

ABL

cont

C8H

200

FFH
255

Va

5.0

ria
ble

Va

5.0

ria
ble

5.0 -3.0 3.0 5.0 dB

FFH

5.0

255

5.0 - -15 -10 dB

5.0 - -25 -20 dB

5.0 - -15 -10 dB

5.0 - -25 -20 dB

5.0 - -15 -10 dB

BUS CTL (H) Limits

01H

02H

03H

04H

05H

06H

07H

08H

Sub

Sub

Sub

OSD

BLK

cont

cont

cont

1

2

3

C8H

C8H

C8H

200

200

200

FFH

FFH

FFH

255

255

255

FFH

FFH

FFH

255

255

255

Adj

Adj

00H000H0FFH

OUT

D/A

255

09H

D/A

D/A

D/A

OUT

OUT

1

OUT

2

3

4

FFH

FFH

FFH

255

255

255

0BH

INT

EXT

Min. Typ. Max.

3.5 4.1 4.7 VP-P

4.7 5.0 5.8 VP-P

-2.0 0 2.5 dB

00H

-3.0 0 3.0 dB

0

- -25 -20 dB

Unit

4

MITSUBISHI ICs (Monitor)

PRELIMINARY

Notice:This is not a final specification.

Some parametric limits are subject to change.

ELECTRICAL CHARACTERISTICS (cont.)

Symbol Parameter

Tr

Pulse
characteristics1
(4VP-P)

Pulse
characteristics2
(4VP-P)

Relative pulse
characteristics1

Relative pulse
characteristics2

Clamp pulse
threshold
voltage

Clamp pulse
minimum
width

OSD pulse
characteristics1

OSD pulse
characteristics2

OSD adjust control
characteristics1

OSD adjust control
relative
characteristics1

OSD adjust control
characteristics2

OSD adjust control
relative

characteristics2
OSD adjust control

characteristics3
OSD adjust control

relative
characteristics3

OSD input
threshold
voltage

OSD BLK input
threshold
voltage

Retrace BLK
characteristics1

Retrace BLK
characteristics2

Retrace BLK
characteristics3

Retrace BLK
input threshold
voltage

SOG input
maximum
noise voltage

SOG
minimum
input voltage

Sync output
hi level

Sync output
lo level

Sync output
delay time1

Tr

Tf

Tr

∆

∆

VthCP

WCP

OTr

OTf

Oaj1

∆Oaj1

Oaj2

∆Oaj2

OBLK

∆OBLK

VthOSD

VthBLK

HBLK1

HBLK2

HBLK3

VthRET

SS-NV

SS-SV

VSH

VSL

TDS-F

BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR

Test

point

2,6,11

(s)

OUT

OUT

OUT

OUT

OUT

OUT

RGB

in

b

SG1

b

SG1

b

SG1

b

SG1

b

SG1

b

SG1

OSD

BLK

OUT a a

OUT a a

OUT a

SG6bSG6

- - - - - - - - - - - 0.8 1.0 1.2 -

OUT a

SG6bSG6

- - - - - - - - - - - 0.8 1.0 1.2 -

OUT a

SG6

- - - - - - - - - - - -0.2 0 0.2 VP-P

OUT a

OUT

b

SG1

SG6

SG6

Variable

OUT a a a

OUT a a a

OUT a a a

OUT a a a

SonG IN

Sync OUT

Sync OUT

Sync OUT

Sync OUT

Sync OUT

a a a a a

SonG IN

a a a a a

a a a a a

a a a a a

a a a a a

Input

4,9,13

1

OSD

CP in27ReT

in

a a

a a

a a

a a

a a

a a a a a 2.0 5.0

SG5

SG5

SG5

SG5

SG5

Variable

SG5

Variable

b

SG6

SG5

b

SG6

SG5

b

SG5

b

SG5

b

a

SG5

b

b

SG6

SG5

Variable

b

a

SG5

SG5

SG5

SG5

SG5

M52742ASP

CTL

voltage

19

b

b

b

b

7

SOG

in

BLK

a a a

a a a

a a a

a a a

b

a a a 2.0 5.0

16

UNI

in

30

Bri-

ght

Vari
able

Vari
able

Vari
able

Vari
able

15

ABL

5.0

5.0

5.0

5.0

00H

Main

cont

Va
ria

ble

Va
ria

ble

Vari

able

Vari

able

FFH
255

b

b

a a a 2.0 5.0 - 3.0 6.0 ns

b

a a a 2.0 5.0

b

a a a 2.0 5.0

b

a a a 2.0 5.0

b

a a a 2.0 5.0

b

a a a 2.0 5.0

b

a a a 2.0 5.0

b

b

a a 2.0 5.0

SG7

b

b

a a 2.0 5.0

SG7

b

b

a a 2.0 5.0

SG7

b

b

a a 2.0 5.0

SG7

Variable

b

SG4

Variable

b

SG4

Variable

b

SG4

b

SG4

b

SG4

a 2.0 5.0 - - 0.02 VP-P

a 2.0 5.0 0.2 0.3 - VP-P

a 2.0 5.0 4.5 4.9 5.0 V

a 2.0 5.0 0 0.3 0.6 V

a 2.0 5.0 0 60 90 ns

BUS CTL (H) Limits

01H

02H

03H

04H

05H

06H

07H

08H

Sub
cont

Sub

Sub

OSD

BLK

cont

cont

1

2

3

D/A

Adj

Adj

OUT

1

08H

8

08H

8

0FH

15

08H

8

00H

0

08H

8

00H

0

0FH

15

06H

6

00H

0

08H

8

D/A
OUT

09H

D/A

D/A

OUT

OUT

2

3

0BH

INT

EXT

Min. Typ. Max.

4

- 1.7 - ns

- 2.2 - ns

-0.8 0 0.8 ns

-0.8 0 0.8 ns

1.0 1.5 2.0 V

0.2 0.5 -

- 3.0 6.0 ns

4.6 5.4 6.2 VP-P

2.8 3.3 3.8 VP-P

0 -0.1 -0.3 VP-P

2.2 2.7 3.2 V

2.2 2.7 3.2 V

1.7 2.0 2.3 V

0.7 1.0 1.3 V

0.1 0.4 0.7 V

1.0 1.5 2.0 V

Unit

µs

5

MITSUBISHI ICs (Monitor)

PRELIMINARY

Notice:This is not a final specification.

Some parametric limits are subject to change.

ELECTRICAL CHARACTERISTICS (cont.)

Symbol Parameter

TDS-R

VOH

VOL

DNL

UNI1

UNI2

1A-

1A+

Sync output
delay time2

D/A H output
voltage

D/A L output
voltage

D/A
nonlinearity

Uniformity
characteristics1

Uniformity
characteristics2

D/A input
current range

D/A output
current range

BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR

Test

point

(s)

Sync OUT

D/A

OUT

D/A

OUT

D/A

OUT

OUT

OUT

D/A

OUT

D/A

OUT

2,6,11

OSD

RGB

BLK

in

a a a a a

a a a a a a a 2.0 5.0

a a a a a a a 2.0 5.0

a a a a a a a 2.0 5.0
b

SG1

b

SG1

a a a

a a a

4,9,13

1

a a

a a

OSD

in

Input

CP in27ReT

SG5

SG5

19

b

b

a

a

7

SOG

in

BLK

b

SG4

a a 5.0

a a 5.0
a a a 2.0 5.0

a a a

M52742ASP

CTL

voltage

16

UNI

in

30

Bri­ght

15

ABL

00H

Main

cont

a 2.0 5.0 0 60 90 ns

FFH
255

b

SG6

2.5V

b

SG6

1.25V

2.0

2.0

C8H

200

00H
0

2.0 5.0

BUS CTL (H) Limits

01H

02H

03H

04H

05H

06H

07H

08H

Sub

Sub

Sub

OSD

BLK

cont

cont

cont

1

2

3

FFH

FFH

FFH

255

255

255

C8H

C8H

C8H

200

200

200

00H

00H

00H

0

0

0

Adj

Adj

00H000H0FFH

00H

00H

0

0

D/A

OUT

255

00H000H000H000H

Vari
able

FFH
255

00H
0

09H

D/A

D/A

D/A

OUT

OUT

FFH
255

Vari
able

FFH
255

00H
0

OUT

2

3

4

FFH

FFH

255

255

0

Vari

Vari

able

able

FFH

FFH

255

255

00H

00H

0

0

1

0BH

INT

EXT

Min. Typ. Max.

00H

4.5 5.0 5.5 VDC

0

0 0.5 1.0 VDC

-1.0 - 1.0 LSB

7 10 13 %

3.5 5 6.5 %

00H
0

0.18

- -

-

-

1.0

Unit

mA

mA

ELECTRICAL CHARACTERISTICS TEST METHOD

ICC1 Circuit current1
Measuring conditions are as listed in supplementary Table.

Measured with a current meter at test point IA.

ICC2 Circuit current2
Measuring conditions are as listed in supplementary Table.

Measured with a current meter at test point IB.

Vomax Output dynamic range

Decrease V30 gradually, and measure the voltage when the
waveform output is distorted. The voltage is called VOL.
Next, increase V30 gradually, and measure the voltage when the
top of waveform output is distorted. The voltage is called VOH.
Voltage Vomax is calculated by the equation below:
Vomax = VOH-VOL

(V)

VOH

5.0
Waveform output

VOL

0.0

Gv Maximum gain

Input SG1, and read the amplitude output at OUT (29, 32, 35). The
amplitude is called VOUT (29, 32, 35). Maximum gain GV is
calculated by the equation below:

VOUT

GV=20Log

0.7

(dB)

∆Gv Relative maximum gain

Relative maximum gain DGV is calculated by the equation bellow:
∆GV= VOUT (29)/VOUT (32),

VOUT (32)/VOUT (35),
VOUT (35)/VOUT (29)

VC1 Main contrast control characteristics1

Measuring the amplitude output at OUT (29, 32, 35). The
measured value is called VOUT (29, 32, 35). Main contrast control
characterics VC1 is calculated by the equation bellow:

VOUT

VC1=20Log

0.7

(dB)

∆VC1 Main contrast control relative characteristics1

Relative characteristics ∆VC1 is calculated by the equation bellow:
∆VC1=VOUT (29)/VOUT (32),

VOUT (32)/VOUT (35),
VOUT (35)/VOUT (29)

Vimax Maximum input

Increase the input signal (SG2) amplitude gradually, starting from
700mVP-P. Measure the amplitude of the input signal when the
output signal starts becoming distorted.

VC2 Main contrast control characteristics2

Measuring condition and procedure are the same as described in
VC1.

∆VC2 Main contrast control relative characteristics2

Measuring condition and procedure are the same as described in
∆VC1.

6

MITSUBISHI ICs (Monitor)

PRELIMINARY

Notice:This is not a final specification.

Some parametric limits are subject to change.

VC3 Main contrast control characteristics3

Measuring the amplitude output at OUT (29, 32, 35).
The measured value is called VOUT (29, 32, 35).

∆VC3 Main contrast control relative characteristics3

Measuring condition and procedure are the same as described in
∆VC1.

VSC1 Sub contrast control characteristics1

Measure the amplitude output at OUT (29, 32, 35). The measured
value is called VOUT (29, 32, 35). Sub contrast control
characteristics VSC1 is calculated by the equation below:

VSC1=20Log

∆VSC1 Sub contrast control relative characteristics1

Relative characteristics ∆VSC1 is calculated by the equation below:
∆VSC1=VOUT (29)/VOUT (32),

VSC2 Sub contrast control characteristics2

Measuring condition and procedure are the same as described in
VSC1.

∆VSC2 Sub contrast control relative characteristics2

Measuring condition and procedure are the same as described in

∆VSC1.

VSC3 Sub contrast control characteristics3

Measuring the amplitude output at OUT (29, 32, 35).
The measured value is called VSC3

∆VSC3 Sub contrast control relative characteristics3

Measuring condition and procedure are the same as described in

∆VSC1.

VMSC Main/sub contrast control characteristics

Measure the amplitude output at OUT (29, 32, 35). The measured
value is called VMSC

∆VMSC Main/sub contrast control relative characteristics

Relative characteristics VMSC is calculated by the equation
below:
VMSC = VOUT (29)/VOUT (32),

∆

BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR

VOUT

(dB)

0.7

VOUT (32)/VOUT (35),
VOUT (35)/VOUT (29).

∆

VOUT (32)/VOUT (35),
VOUT (35)/VOUT (29)

M52742ASP

ABL1 ABL control characteristics1

Measure the amplitude output at OUT (29, 32, 35). The measured
value is called VOUT (29, 32, 35), and is treated as ABL1.

∆ABL1 ABL control relative characteristics1

Relative characteristics ∆ABL1 is calculated by the equation below:
∆ABL1= VOUT (29)/VOUT (32),

VOUT (32)/VOUT (35),
VOUT (35)/VOUT (29)

ABL2 ABL control characteristics2

Measuring condition and procedure are the same as described in
ABL1.

∆ABL2 ABL control relative characteristics2

Measuring condition and procedure are the same as described in
∆ABL1.

VB1 Brightness control characteristics1

Measure the DC voltage at OUT (29, 32, 35) with a voltmeter. The
measured value is called VOUT (29, 32, 35), and is treated as VB1.

∆VB1 Brightness control relative characteristics1

Relative characteristics ∆VB1 is calculated by the difference in the
output between the channels.
∆VB1= VOUT (29) -VOUT (32),

VOUT (32) -VOUT (35),
VOUT (35) -VOUT (29)

VB2 Brightness control characteristics2

Measuring condition and procedure are the same as described in
VB1.

∆VB2 Brightness control relative characteristics2

Measuring condition and procedure are the same as described in
∆VB1.

VB3 Brightness control characteristics3

Measuring condition and procedure are the same as described in
VB1.

∆VB3 Brightness control relative characteristics3

Measuring condition and procedure are the same as described in

∆VB1.

7

MITSUBISHI ICs (Monitor)

PRELIMINARY

Notice:This is not a final specification.

Some parametric limits are subject to change.

FC1 Frequency characteristics1 (f=50MHz)

First, SG3 to 1MHz is as input signal. Input a resister that is about
2kΩ to offer the voltage at input pins (2, 6, 11) in order that the bot­tom of input signal is 2.5V. Control the main contrast in order that
the amplitude of sine wave output is 4.0VP-P. Control the brightness
in order that the bottom of sine wave output is 2.0VP-P. By the same
way, measure the output amplitude when SG3 to 50MHz is as input
signal. The measured value is called VOUT (29, 32, 35). Frequency
characteristics FC1 (29, 32, 35) is calculated by the equation below:

FC1=20log (dB)

∆FC1 Frequency relative characteristics1 (f=50MHz)

Relative characteristics ∆FC1 is calculated by the difference in the
output between the channels.

FC1' Frequency characteristics1 (f=200MHz)

Measuring condition and procedure are the same as described in
table, expect SG3 to 200MHz.

Output amplitude when inputted SG3 (1MHz):4VP-P

BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR

VOUT VP-P

M52742ASP

C.T.2 Crosstalk2 (f=50MHz)

Input SG3 (50MHz) to pin6 only, and then measure the waveform
amplitude output at OUT (29, 32, 35). The measured value is called
VOUT (29, 32, 35). Crosstalk C.T.2 is calculated by the equation
below:

C.T.2=20 log

C.T.2' Crosstalk2 (f=200MHz)

Measuring condition and procedure are the same as described in
C.T.2, expect SG3 to 200MHz.

C.T.3 Crosstalk3 (f=50MHz)

Input SG3 (50MHz) to pin11 only, and then measure the waveform
amplitude output at OUT (29, 32, 35). The measured value is called
VOUT (29, 32, 35). Crosstalk C.T.3 is calculated by the equation
below:

C.T.3=20 log

VOUT (29, 32)

VOUT (35)

VOUT (29, 32)

VOUT (35)

(dB)

(dB)

∆FC1' Frequency relative characteristics1 (f=200MHz)

Relative characteristics ∆FC1' is calculated by the difference in the
output between the channels.

FC2 Frequency characteristics2 (f=200MHz)

SG3 to 1MHz is as input signal. Control the main contrast in order
that the amplitude of sine wave output is 1.0VP-P. By the same way,
measure the output amplitude when SG3 to 200MHz is as input
signal.
The measured value is called VOUT (29, 32, 35). Frequency
characteristics FC2 (29, 32, 35) is calculated by the equation below:

∆

VOUT VP-P

VOUT (29, 32)

VOUT (35)

(dB)

FC2=20log (dB)

∆FC2 Frequency relative characteristics2 (f=200MHz)

Relative characteristics FC2 is calculated by the difference in the
output between the channels.

C.T.1 Crosstalk1 (f=50MHz)

Input SG3 (50MHz) to pin2 only, and then measure the waveform
amplitude output at OUT (29, 32, 35). The measured value is called
VOUT (29, 32, 35). Crosstalk C.T.1 is calculated by the equation
below:

C.T.1' Crosstalk1 (f=200MHz)

Measuring condition and procedure are the same as described in
C.T.1, expect SG3 to 200MHz.

Output amplitude when inputted SG3 (1MHz):4VP-P

C.T.1=20 log

C.T.3' Crosstalk3 (f=200MHz)

Measuring condition and procedure are the same as described in
C.T.3, expect SG3 to 200MHz.

Tr Pulse characteristics1 (4VP-P)

Control the main contrast (00H) in order that the amplitude of output
signal is 4.0VP-P.
Control the brightness (V30) in order that the Black level of output
signal is 2.0V.
Measure the time needed for the input pulse to rise from 10% to 90
% (Tr1) and for the output pulse to rise from 10% to 90% (Tr2) with
an active probe.
Pulse characteristics Tr is calculated by the equations below :

Tr = [(Tr2)2-(Tr1)2]

∆Tr Relative pulse characteristics1

Relative characteristics ∆Tr is calculated by the difference in the
output between the channels.

Tf Pulse characteristics2 (4VP-P)

Measure the time needed for the input pulse to fall from 90% to 10%
(Tf1) and for the output pulse to fall from 90% to 10% (Tf2) with an
active prove.
Pulse characteristics Tf is calculated by the equations below :

Tf = [(Tf2)2-(Tf1)2]

8

MITSUBISHI ICs (Monitor)

PRELIMINARY

Notice:This is not a final specification.

Some parametric limits are subject to change.

∆Tf Relative pulse characteristics2

Relative characteristics ∆Tf is calculated by the difference in the
output between the channels.

100%

0%

VthCP Clamp pulse threshold voltage

Turn down the SG5 input level gradually from 5.0VP-P, monitoring
the waveform output.
Measure the top level of input SG5 at when the output pedestal
level is start to going down or unstable.

WCP Clamp pulse minimum width

Decrease the SG5 pulse width gradually from 0.5µs, monitoring the
output. Measure the input SG5 pulse width (at the point of 1.5V)
at when output pedestal level is start to going down or unstable.

OTr OSD pulse characteristics1

Measure the time needed for the output pulse to rise from 10% to
90% (Otr) with an active prove.

OTf OSD pulse characteristics2

Measure the time needed for the output pulse to fall from 90% to
10% (Otf) with an active prove.

Oaj1 OSD adjust control characteristics1

Measure the amplitude output at OUT (29, 32, 35). The measured
value is called VOUT (29,32,35), and is treated as Oaj1.

BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR

90%

10%

Tf1 or Tf2Tr1 or Tr2

M52742ASP

OBLK OSD adjust control characteristics3

Measuring condition and procedure are the same as described in
Oaj1.

∆OBLK OSD adjust control relative characteristics3

Measuring condition and procedure are the same as described in

∆Oaj1.

VthOSD OSD input threshold voltage

Reduce the SG6 input level gradually, monitoring output. Measure
the SG6 level when the output reaches 0V. The measured value is
called VthOSD.

VthBLK OSD BLK input threshold voltage

Confirm that output signal is being blanked by the SG6 at the time.
Monitoring to output signal, decreasing the level of SG6. Measure
the top level of SG6 when the blanking period is disappeared. The
measured value is called VthBLK.

HBLK1 Retrace BLK characteristics1

Measure the amplitude output is blanked by the SG7 at OUT (29,
32, 35). The measured value is called VOUT (29, 32, 35), and is
treated as HBLK1.

HBLK2 Retrace BLK characteristics2

Measure the amplitude output is blanked by the SG7 at OUT (29,
32, 35). The measured value is called VOUT (29, 32, 35), and is
treated as HBLK2.

HBLK3 Retrace BLK characteristics3

Measure the amplitude output is blanked by the SG7 at OUT (29,
32, 35). The measured value is called VOUT (29, 32, 35), and is
treated as HBLK3.

∆Oaj1 OSD adjust control relative characteristics1

Relative characteristics ∆Oaj1 is calculated by the equation below:
∆Oaj1=VOUT (29)/VOUT (32),

VOUT (32)/VOUT (35),
VOUT (35)/VOUT (29)

Oaj2 OSD adjust control characteristics2

Measuring condition and procedure are the same as described in
Oaj1.

∆Oaj2 OSD adjust control relative characteristics2

Measuring condition and procedure are the same as described in

∆Oaj1.

9

VthRET Retrace BLK input threshold voltage

Confirm that output signal is being blanked by the SG7 at the time.
Monitoring to output signal, decreasing the level of SG7. Measure
the top level of SG7 when the blanking period is disappeared. The
measured value is called VthRET.

MITSUBISHI ICs (Monitor)

PRELIMINARY

Notice:This is not a final specification.

Some parametric limits are subject to change.

SS-NV SOG input maximum noise voltage

The sync's amplitude of SG4 be changed all white into all black,
increase from 0VP-P to 0.02VP-P. No pulse output permitted.

SS-SV SOG minimum input voltage

The sync's amplitude of SG4 be changed all white or all black,
decrease from 0.3VP-P to 0.2VP-P. Confirm no malfunction produced
by noise.

VSH Sync output hi level

Measure the high voltage at SyncOUT. The measured value is
treated as VSH.

VSL Sync output lo level

Measure the low voltage at SyncOUT. The measured value is
treated as VSL.

TDS-F Sync output delay time1

SyncOUT becomes High with sync part of SG4.
Measure the time needed for the front edge of SG4 sync to fall from
50% and for SyncOUT to rise from 50% with an active prove. The
measured value is treated as TDS-F, less than 90nsec.

TDS-R Sync output delay time2

Measure the time needed for the rear edge of SG4 sync to rise
from 50% and for SyncOUT to fall from 50% with an active prove.
The measured value is treated as TDS-R, less than 90nsec.

SG4

SyncOUT

BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR

Pedestal voltage

(50%)sync (50%)

TDS-RTDS-F

M52742ASP

VOH D/A H output voltage

Measure the DC voltage at D/AOUT. The measured value is
treated as VOH.

VOL D/A L output voltage

Measure the DC voltage at D/AOUT. The measured value is
treated as VOL.

IAO D/A output current range

Electric current flow from the output of D/AOUT must be less than

1.0mA --- IA+.
Electric current flow into the output of D/AOUT must be more
than 0.18mA --- IA-.

IA-

D/A OUT

DNL D/A nonlinearity

The difference of differential non-linearity of D/AOUT must be less
than ±1.0LSB.

UNI1 Uniformity characteristics1

UNI2 Uniformity characteristics2
VuniA is amplitude output at OUT (29, 32, 35), when SG6 is low

voltage. VuniB is amplitude output at OUT (29, 32, 35), when SG6
is high voltage.
moduration ratio UNI (UNI2) is calculated by the equation below;
UNI1 (UNI2)=100 • (VuniB/VuniA-1) (%)

A

1V

DC

OUT

SG6

VuniA

VuniB

5VP-P (2.5VP-P)

Pedestal
voltage

10

MITSUBISHI ICs (Monitor)

PRELIMINARY

Notice:This is not a final specification.

Some parametric limits are subject to change.

I2C-BUS PROTOCOL

(1) Slave address

D7 D6 D5 D4 D3 D2 D1 R/W

1 0 0 0 1 0 0 0 =88H

(2) Slave receiver format

S

START condition

(3) Sub address byte and data byte format

Function bit

Main contrast 8 00H

Sub contrast R 8 01H

Sub contrast G 8 02H

Sub contrast B 8 03H

OSD level 4 04H

RE-BLK adjust 4 05H

D/A OUT1 8 06H

D/A OUT2 8 07H

D/A OUT3 8 08H

D/A OUT4 8 09H

Pedestal clamp INT/EXT SW 1 0BH

BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR

SLAVE ADDRESS SUB ADDRESS DATA BYTE

acknowledge STOP condition

sub

add.

M52742ASP

AA

Data byte (top:byte format under:start condition)

D7 D6 D5 D4 D3 D2 D1 D0

A07 A06 A05 A04 A03 A02 A01 A00

0 1 0 0 0 0 0 0

A17 A16 A15 A14 A13 A12 A11 A10

1 0 0 0 0 0 0 0

A27 A26 A25 A24 A23 A22 A21 A20

1 0 0 0 0 0 0 0

A37 A36 A35 A34 A33 A32 A31 A30

1 0 0 0 0 0 0 0

- - - - A43 A42 A41 A40
0 0 0 0 1 0 0 0

- - - - A53 A52 A51 A50
0 0 0 0 1 0 0 0

A67 A66 A65 A64 A63 A62 A61 A60

1 0 0 0 0 0 0 0

A77 A76 A75 A74 A73 A72 A71 A70

1 0 0 0 0 0 0 0

A87 A86 A85 A84 A83 A82 A81 A80

1 0 0 0 0 0 0 0

A97 A96 A95 A94 A93 A92 A91 A90

1 0 0 0 0 0 0 0

- - - - - - - AB0
0 0 0 0 0 0 0 0

A

P

Notes) pedestal level INT/EXT SW

0 INT 1 EXT

11

MITSUBISHI ICs (Monitor)

PRELIMINARY

Notice:This is not a final specification.

Some parametric limits are subject to change.

BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR

M52742ASP

TIMING REQUIREMENT OF I2C

Symbol Parameter Min. Max. Unit
VIL Input voltage LOW -0.5 1.5 V
VIH Input voltage HIGH 3.0 5.5 V
fSCL SCL clock frequency 0 100 kHz
tBUF Time the bus must be free before a new transmission can start 4.7 - µs
tHD:STA Hold time start condition. After this period the first clock pulse is generated 4.0 - µs
tLOW The LOW period of the clock 4.7 - µs
tHIGH The HIGH period of the clock 4.0 - µs
tSU:STA Set up time for start condition (Only relevant for a repeated start condition) 4.7 - µs
tHD:DAT
tSU:DAT Set-up time DATA 250 - ns
tr Rise time of both SDA and SCL - 1000 ns
tf Fall time of both SDA and SCL - 300 ns
tSU:STO Set-up time for stop condition 4.0 - µs

Hold time for I2C devices

0 - µs

TIMING DIAGRAM

tr, tf

tBUF

SDA

SCL

VIH

VIL

VIH

VIL

tHD:DATtSU:DATtHD:STA

tLOW tHIGH

S S P S

tSU:STA

tSU:STO

12

MITSUBISHI ICs (Monitor)

PRELIMINARY

Notice:This is not a final specification.

Some parametric limits are subject to change.

INPUT SIGNAL

SG No. Signals

Pulse with amplitude of 0.7VP-P (f=30kHz). Video width of 25µs. (75%)

SG1

Video signal

(all white)

SG2

Video signal
(step wave)

SG3

Sine wave

(for freq. char.)

BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR

33µs

8µs

M52742ASP

0.7VP-P

0.7VP-P
(Amplitude is variable.)

Sine wave amplitude of 0.7VP-P.
f=1MHz, 50MHz, 200MHz (variable)

SG4

Video signal

(all white,
all black)

SG5

Clamp

pulse

SG6

OSD pulse

Video width of 25µs. (75%)

3µs

Pulse width and amplitude are variable.

0.5µs

5µs

5VTTL

0.7VP-P

0.3VP-P

5VTTL

Amplitude is variable.

all white or all black
variable.

Sync’s amplitude
is variable.

SG7

BLK pulse

13

5µs

5VTTL

Amplitude is variable.

) f=30kHz

*

MITSUBISHI ICs (Monitor)

C/P IN

D/A

OUT4

ba

SG7

SW27

OUT (29)

0 to 5V

470

100

100µH

0 to 5V

SG6

47µ

1k

SYNC

OUT

A

5V

IB

0.01µ

3.3µ

SW11

b

a

IN (11)

SONG

IN

1µ

0.01µ

3.3µ

SW6

b

a

IN (6)

3.3µ

SW2

a

IN (2)

b

0.01µ

SG2
SG3

12V

A

IA

47µ

SG6

: MEASURE POINT

*

Capacitor : 0.01µF (unless otherwise specified.)

PRELIMINARY

Notice:This is not a final specification.

Some parametric limits are subject to change.

TEST CIRCUIT

OUT (35)

470

34

3536

out f/b brt dac dac sda12V gndf/b f/boutout blk dac gnddac c/pscl

R G SonG B 12V UNI

blk osd12V osd12Vgnd gnd gnd ablosd sync5V

1 32 4 5 98 10 1211 13 146 7 15 16 17 18

M52742ASP

BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR

D/A

D/A

OUT (32)

3233

OUT1

V30

470

31

29

30 2627 252324

28

M52742ASP

OUT2

D/A

OUT3

22

SCLSDA

b a

SW19

202119

SG5

V15

SW16

a

Units Resistance : Ω

b

Capacitance : F

SW1

a

b

SG1

SW4

a

b

SW7

b

SG4

SW9

a

b

a

SW13

a

b

14

MITSUBISHI ICs (Monitor)

PRELIMINARY

Notice:This is not a final specification.

Some parametric limits are subject to change.

TYPICAL CHARACTERISTICS

2800
2403

2400

2000

1600

1200

800

400

0

-20 0 25 50 75 100 125 150

BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR

THERMAL DERATING

AMBIENT TEMPERATURE Ta (°C)

1442

M52742ASP

MAIN CONTRAST CONTROL CHARACTERISTICS

6

5

4

3

2

1

0

00H

MAIN CONTRAST CONTROL DATA

Sub contrast: Max

FFH

SUB CONTRAST CONTROL CHARACTERISTICS

6

5

4

3

2

1

0

00H

Main contrast: Max

FFH

SUB CONTRAST CONTROL DATA

ABL CHARACTERISTICS

6

5

4

BRIGHTNESS CONTROL CHARACTERISTICS

6

5

4

3

2

1

0

0

2

4

BRIGHTNESS CONTROL VOLTAGE (VDC)

OSD ADJUST CONTROL CHARACTERISTICS

6

5

4

15

3

2

1

0

0

Main contrast: Max

Sub contrast : Max

ABL CONTROL VOLTAGE (VDC)

3

2

1

0

5

0H

FH

OSD ADJUST CONTROL DATA

MITSUBISHI ICs (Monitor)

PRELIMINARY

Notice:This is not a final specification.

Some parametric limits are subject to change.

SYNC ON GREEN INPUT MIN. PULSE WIDTH

12

10

8

6

4

2

7

1m

IN

0

0

BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR

(Video duty=75%)

Sync separate
normal operating range

INPUT SYNC AMPLITUDE (VP-P)

0.5

M52742ASP

UNIFORMITY CHARACTERISTICS

12

10

8

6

4

2

0

0

INPUT AMPLITUDE (VP-P)

2.5

2.01.51.00.5

16

MITSUBISHI ICs (Monitor)

PRELIMINARY

Notice:This is not a final specification.

Some parametric limits are subject to change.

APPLICATION EXAMPLE

110V

BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR

M52742ASP

CRT

Cut Off Adj

100µH

5VTTL

100

3.3µ

35 313336

0.01µ

DAC OUTx4

5VTTL

BLK IN

470

470 470

0 to 5V

0.01µ

2932 28 27 2324 22 202126 2534 30

0.01µ 0.01µ

0.01µ

0.01µ

(for retrace)
SDA

SCL
Clamp pulse

IN

19

M52742ASP

1885 9 10 1413 15 171611 123 72 641

0.01µ

1µ

47µ

3.3µ

75

5VTTL

0.01µ

75

0.01µ

47µ

5VTTL

3.3µ

0.01µ

0.01µ
33µ

47µ

75

5VTTL

2.2µ

1k

ABL IN

0 to 5V

Sync
Sep
OUT

Uniformity
IN

OSD IN (B)
OSD IN (G)
OSD IN (R)
BLK IN

(for OSD)

17

12V

5V

INPUT
(R)

*

INPUT
(G)

* Circuit example of pin6 and pin7 same signal input

SONG

INPUT

INPUT
(B)

0.01µ 47µ

•FEED BACK IS
INTERNAL FEED BACK

Units Resistance :

Ω

Capacitance : F

MITSUBISHI ICs (Monitor)

PRELIMINARY

Notice:This is not a final specification.

Some parametric limits are subject to change.

BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR

M52742ASP

DESCRIPTION OF PIN

Pin No. Name DC voltage (V ) Peripheral circuit of pins Description of function

1 OSD BLK IN -

2
6

11

INPUT (R)
INPUT (G)
INPUT (B)

2.5

R
G

1

2K

B

0.37mA

2k

2.7V

0.37mA

2k

•Input pulses

•Connected to GND if not
used.

•Clamped to about 2.5V
due to clamp pulses
from pin 19.

•Input at low impedance.

3.7 to 5V

GND to1.7V

12

13

10
14
22
33

2.5V

0.3mA

3
8

VCC1 (R)
VCC1 (G)

12 -

VCC1 (B)

CP

•Apply equivalent
voltage to 3 channels.

•Input pulses

4
9

OSD IN (R)
OSD IN (G)

-

OSD IN (B)

1k

2k

3.7 to 5V

GND to 1.7V

•Connected to GND if not

0.5mA

5

GND 1 (R)

2.7V

used.

GND 1 (G)
GND 1 (B)

GND ­GND (5V)
GND 2

•SYNC ON GREEN
input pin for sync
separation.

7

7

INPUT
(S on G)

When open≈ 2.5V

500

Sync is negative.
input signal at Pin7,

3.33V

compare with the
reference voltage of
internal circuit in order to
separate sync signal.

•When not used, set to

0.22mA

0.15mA

0.22mA

OPEN.

18

MITSUBISHI ICs (Monitor)

PRELIMINARY

Notice:This is not a final specification.

Some parametric limits are subject to change.

BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR

M52742ASP

DESCRIPTION OF PIN (cont.)

Pin No. Name DC voltage (V ) Peripheral circuit of pins Description of function

2.5V

•ABL (Automatic Beam
Limiter) input pin.
Recommended voltage
range is 0 to 5V.
When ABL function is not
used, set to 5V.

•Uniformity input pin.
Recommended
amplitude range is 0 to
5VP-P.

15 ABL IN When open 2.5V

16 Uniformity IN 5.75

1.2k

0.5mA

1.2k

20k

30k

15

200

20k

7.25V
16

17 VCC (5V) 5 -

18

19

S on G Sep
OUT

Clamp Pulse
IN

-

41k

-

19

2.2V

50k

5k

18

•Sync signal output pin,
Being of open collector
output type.

•Input pulses

2.5 to 5V

GND to 0.5V

•Input at low impedance.

0.15mA

20 SCL -

19

•SCL of I2C BUS
(Serial clock line)

20

2k

3V

VTH=2.3V

MITSUBISHI ICs (Monitor)

PRELIMINARY

Notice:This is not a final specification.

Some parametric limits are subject to change.

BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR

M52742ASP

DESCRIPTION OF PIN (cont.)

Pin No. Name DC voltage (V ) Peripheral circuit of pins Description of function

50k

2

C BUS

21 SDA -

23
24
25
26

D/A OUT -

•SDA of I
(Serial data line)

21

2k

3V

VTH=2.3V

•D/A output pin.
Output voltage range is

0 to 5V, Min input current
is 0.18mA when D / A
output pin is 1V.
Max output current is

1.0mA.

27

28
31
34

29
32
35

Retrace BLK
IN

EXT Feed
Back (B)

EXT Feed
Back (G)

EXT Feed
Back (R)

OUTPUT (B)
OUTPUT (G)
OUTPUT (R)

-

Variable

Variable

50k

27

35k

36

50

50

R
G
B

2.25V

•Input pulses

2.5 to 5V

GND to 0.5V

•Connected to GND if not
used.

•A resistor is needed on
the GND side.

Set discretionally to
maximum 15mA,
depending on the
required driving capacity.

36 VCC2

12

•Used to supply power to
output emitter follower
only.

20

MITSUBISHI ICs (Monitor)

PRELIMINARY

Notice:This is not a final specification.

Some parametric limits are subject to change.

BUS CONTROLLED 3-CHANNEL VIDEO PREAMP FOR CRT DISPLAY MONITOR

M52742ASP

DESCRIPTION OF PIN (cont.)

Pin No. Name DC voltage (V ) Peripheral circuit of pins Description of function

35k

30

Main
Brightness

-

APPLICATION METHOD FOR M52742SP

CLAMP PULSE INPUT
Clamp pulse width is recommended

above 15kHz, 1.0µsec
above 30kHz, 0.5µsec
above 64kHz, 0.3µsec.
The clamp pulse circuit in ordinary set is a long round about way,
and beside high voltage, sometimes connected to external terminal,
it is very easy affected by large surge.
Therefore, the Fig. shown right is recommended.

30

NOTICE OF APPLICATION

•Make the nearest distance between output pin and pull down
resistor.

•Recommended pedestal voltage of IC output signal is 2V.

•It is recommended that
the IC be used between
pedestal voltage 2V and
3V.

19

EXT-FEED BACK

In case of application circuit example of lower figure, Set up R1, R2
which seems that the black level of the signal feedbacked from
Power AMP is 1V, when the bottom of output signal is 1V.

MAIN BRIGHTNESS
DC:1 to 5V

Pre Amp
INPUT R

M52742ASP

R OUT PUT
Black level 1 to 5V

R Feed back
Black level 1 to 5V

Power Amp

Power Amp OUT

R1

R2

21

EXT-FEED BACK APPLICATION CIRCUIT