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MITSUMI
I
2
C Bus Video Switch MM1250
I
2
C Bus Video Switch
Monolithic IC MM1250
Outline
This IC is an audio/video switch that supports an I
2
C bus for television.
Features
1. Utilizes serial control by I
2
C bus
2. 3 video input systems for 3 outputs, V
OUT
, Y
OUT
and C
OUT
3. V
OUT
has built-in 6dB amp
4. V
OUT
has built-in output clamp circuit
5. Audio system has built-in mute function
6. 1 output port built-in
7. Operating power supply voltage range
8~13V
8. Video frequency response
10MHz
9. Slave address
92H (fixed)
Package
SDIP-24A (MM1250XD)
Applications
I
2
C bus televisions, etc.
MITSUMI
I
2
C Bus Video Switch MM1250
Block Diagram
Fig. 1 Block Diagram
Absolute Maximum Ratings
(Ta=25C)
Item
Symbol
Ratings
Units
Storage temperature
T
STG
-40~+125
C
Operating temperature
T
OPR
-20~+75
C
Power supply voltage
V
CC
15
V
Allowable loss
Pd
1000
mW
MITSUMI
I
2
C Bus Video Switch MM1250
Item
Symbol
Measurement
Measurement conditions
Min. Typ. Max. Units
circuit
Operating power supply voltage
V
CC
V
CC
8.0
13.0
V
Consumption current
I
CC
V
CC
=9V
17
25
33
mA
V
OUT
output
Voltage gain
G
V
1
TP9
SG1 : sine wave 1V
P-P
, 0.1MHz
5.5
6.0
6.5
dB
G
V
2
TP7
Frequency characteristic
F
V
1
TP9
SG1 : sweep signal, 1V
P-P
F
V
2
TP7
10MHz/0.1MHz
-1.0
0
1.0
dB
Differential gain
DG
V
1
TP9
SG1 : staircase wave, 1V
P-P
DG
V
2
TP8
APL=10, 50, 90%
-3
0
3
%
Differential phase
DP
V
1
TP9
SG1 : staircase wave, 1V
P-P
DP
V
2
TP8
APL=10, 50, 90%
-3
0
3
deg
Input dynamic
D
V
1
TP9
SG1 : range sine wave, 1kHz
2.1
V
P-P
D
V
2
TP8
Output offset voltage
V
OFFV
TP9
V
OUT
1 pin DC level difference during switching
0
30
mV
Input impedance
Z
IV
V
TV
, V
E
1, V
E
2
10
15
20
k
Output impedance
Z
OV
2
10
20
30
Y
OUT
output
Voltage gain
G
Y
1
TP1
SG1 : sine wave, 1V
P-P
, 0.1MHz
5.5
6.0
6.5
dB
G
Y
2
TP1
SG6 : sine wave, 2V
P-P
, 0.1MHz
-0.5
0
0.5
dB
F
Y
1
TP1
SG1 : sweep signal, 1V
P-P
Frequency characteristic
10MHz/0.1MHz
-1.0
0
1.0
dB
F
Y
2
TP1
SG6 : sweep signal, 2V
P-P
10MHz/0.1MHz
-1.0
0
1.0
dB
Differential gain
DG
Y
TP2
SG1 : staircase wave, 1V
P-P
APL=10, 50, 90%
-3
0
3
%
Differential phase
DP
Y
TP2
SG1 : staircase wave, 1V
P-P
APL=10, 50, 90%
-3
0
3
deg
Input dynamic range
D
Y
1
TP1
SG6 : sine wave, 1kHz, Comp mode
4.2
V
P-P
D
Y
2
TP1
SG1 : sine wave, 1kHz, TH
S mode
2.1
Output offset voltage
V
OFFY
TP1
Y
OUT
1 pin DC level difference during switching
0
30
mV
Input impedance
Z
IY
Y
IN
10
15
20
k
Output impedance
Z
OY
8
15
22
C
OUT
output
G
C
1
TP4
SG1 : sine wave, 1V
P-P
, 0.1MHz
5.5
6.0
6.5
dB
Voltage gain
G
C
2
TP4
SG2 : sine wave, 1V
P-P
, 0.1MHz
5.5
6.0
6.5
dB
G
C
3
TP4
SG5 : sine wave, 2V
P-P
, 0.1MHz
-0.5
0
0.5
dB
F
C
1
TP4
SG1 : sweep signal, 1V
P-P
, 10MHz/0.1MHz
-1.0
0
1.0
dB
Frequency characteristic
F
C
2
TP4
SG2 : sweep signal, 1V
P-P
, 10MHz/0.1MHz
-1.0
0
1.0
dB
F
C
3
TP4
SG5 : sweep signal, 2V
P-P
, 10MHz/0.1MHz
-1.0
0
1.0
dB
Differential gain
DG
C
TP5
SG1 : staircase wave, 1V
P-P
APL=10, 50, 90%
-3
0
3
%
Differential phase
DP
C
TP5
SG1 : staircase wave, 1V
P-P
APL=10, 50, 90%
-3
0
3
deg
D
C
1
TP4
SG5 : sine wave, 1kHz, COMP mode
4.2
Input dynamic range
D
C
2
TP4
SG1 : sine wave, 1kHz, TH mode
2.1
V
P-P
D
C
3
TP4
SG2 : sine wave, 1kHz, S mode
2.1
Output offset voltage
V
OFFC
TP4
C
OUT
1 pin DC level difference during switching
0
30
mV
Input impedance
Z
IC
C
IN
10
15
20
k
Output impedance
Z
OC
8
15
22
Electrical Characteristics
(Except where noted otherwise, Ta=25C, V
CC
=8V~13V)
MITSUMI
I
2
C Bus Video Switch MM1250
Item
Symbol
Measurement
Measurement conditions
Min. Typ. Max. Units
circuit
R
OUT
output
Voltage gain
G
R
TP6
sine wave, 2.5V
P-P
, 1kHz
-0.5
0
0.5
dB
Total harmonic distortion
THD
R
TP6
sine wave, 2.5V
P-P
, 1kHz
0.01
0.1
%
Output noise voltage
V
NR
TP6
band 15kHz (except during mute)
3
30
Vrms
Mute noise
V
M
1
TP6
during mute
200
600 Vrms
Input dynamic range
D
R
TP6
SG3 : sine wave, 1kHz, total higher
2.0
Vrms
harmonic distortion rate=0.5%
Output offset voltage
V
OFFR
TP6
R
OUT
pin DC level difference during switching
0
15
mV
Input impedance
Z
IR
1
R
TV
22
30
38
k
Z
IR
2
R
E
1, R
E
2
50
68
86
k
Output impedance
Z
OR
60
80
100
L
OUT
output
Voltage gain
G
L
TP3
sine wave, 2.5V
P-P
, 1kHz
-0.5
0
0.5
dB
Total harmonic distortion
THD
L
TP3
sine wave, 2.5V
P-P
, 1kHz
0.01
0.1
%
Output noise voltage
V
NL
TP3
band 15kHz (except during mute)
3
50
Vrms
Mute noise
V
M
2
TP3
during mute
200
600 Vrms
Input dynamic range
D
L
TP3
SG3 : sine wave, 1kHz, total higher
2.0
Vrms
harmonic distortion rate=0.5%
Output offset voltage
V
OFFL
TP3
Lout pin DC level
0
15
mV
difference during switching
Input impedance
Z
IL
1
L
TV
22
30
38
k
Z
IL
2
L
E
1, L
E
2
50
68
86
k
Output impedance
Z
OL
60
80
100
OUT output
Output voltage L
V
OL
TP10
Bit4=0
0.4
V
Crosstalk
V
OUT
2
CT
V
TP7
4.43MHz
*
1
-70
-60
dB
Y
OUT
CT
Y
TP1
4.43MHz
*
2
-70
-60
dB
C
OUT
CT
C
TP4
4.43MHz
*
3
-70
-60
dB
R
OUT
CT
R
TP6
2.5V
P-P
, 1kHz
-80
-70
dB
L
OUT
CT
L
TP3
2.5V
P-P
, 1kHz
-80
-70
dB
Pin DC voltage
1 pin voltage
Vt1
V
CC
=9.0V, SG1~6=no signal
4.8
5.3
5.8
V
2 pin voltage
Vt2
V
CC
=9.0V, SG1~6=no signal
4.1
4.6
5.1
V
3 pin voltage
Vt3
V
CC
=9.0V, SG1~6=no signal
4.8
5.3
5.8
V
4 pin voltage
Vt4
V
CC
=9.0V, SG1~6=no signal
4.8
5.3
5.8
V
5 pin voltage
Vt5
V
CC
=9.0V, SG1~6=no signal
4.1
4.6
5.1
V
6 pin voltage
Vt6
V
CC
=9.0V, SG1~6=no signal
4.8
5.3
5.8
V
7 pin voltage
Vt7
V
CC
=9.0V, SG1~6=no signal, S4=B
4.1
4.6
5.1
V
8 pin voltage
Vt8
V
CC
=9.0V, SG1~6=no signal
4.8
5.3
5.8
V
9 pin voltage
Vt9
V
CC
=9.0V, SG1~6=no signal
4.1
4.6
5.1
V
10 pin voltage
Vt10
V
CC
=9.0V, SG1~6=no signal
4.8
5.3
5.8
V
11 pin voltage
Vt13
V
CC
=9.0V, SG1~6=no signal, BIT4=0
0.2
0.4
V
12 pin voltage
Vt14
V
CC
=9.0V, SG1~6=no signal
4.1
4.6
5.1
V
13 pin voltage
Vt15
V
CC
=9.0V, SG1~6=no signal
3.5
4.0
4.5
V
14 pin voltage
Vt16
V
CC
=9.0V, SG1~6=no signal
2.1
2.6
3.1
V
15 pin voltage
Vt17
V
CC
=9.0V, SG1~6=no signal
0
V
16 pin voltage
Vt18
V
CC
=9.0V, SG1~6=no signal
4.1
4.6
5.1
V
17 pin voltage
Vt19
V
CC
=9.0V, SG1~6=no signal
9
V
18 pin voltage
Vt20
V
CC
=9.0V, SG1~6=no signal
4.1
4.6
5.1
V
19 pin voltage
Vt21
V
CC
=9.0V, SG1~6=no signal
4.1
4.6
5.1
V
20 pin voltage
Vt22
V
CC
=9.0V, SG1~6=no signal
3.4
3.9
4.4
V
21 pin voltage
Vt23
V
CC
=9.0V, SG1~6=no signal
4.1
4.6
5.1
V
22 pin voltage
Vt24
V
CC
=9.0V, SG1~6=no signal
3.4
3.9
4.4
V
MITSUMI
I
2
C Bus Video Switch MM1250
I
2
C Bus Recommended Operating Conditions
(Refer to diagram below)
Item
Symbol
Measurement conditions
Min. Typ. Max. Units
Input voltage L
V
IL
I
2
C logic low level discrimination value
0.7
V
Input voltage H
V
IH
I
2
C logic high level discrimination value
2.1
5.0
V
Clock frequency
f
SCL
100
kHz
Data transfer wait time
t
BUF
4.7
S
SCL start hold time
t
HD : STA
4.0
S
SCL low level hold time
t
LOW
4.7
S
SCL high level hold time
t
HIGH
4.0
S
SCL start setup time
t
SU : STA
4.7
S
SDA data hold time
t
HD : DAT
5.0
S
SDA data setup time
t
SU : DAT
250
S
SCL rise time
t
R
1000
nS
SCL fall time
t
F
300
nS
SCL stop setup time
t
SU : STO
4.0
S
SDA
SCL
t
BUF
P
P
S t
HD:STA
t
HD:DAT
t
HIGH
t
SU:DAT
t
SU:STA
t
SU:STO
t
LOW
Sr
t
R
t
F
I
2
C Bus control signals
Notes :
*
1
Crosstalk V
OUT
2
Input a 1V
P-P
, 4.43MHz sine wave to SG1.
Given S1=A, S5=A, S6~S10= B, Bit=011 and TP7 amplitude V01,
Combinations below : V02, then C
TV
is obtained as follows:
C
TV
=20log (V02/V01) dB
Signal input
Input
Switch status
Control bit
amplitude
S1
S4
S5
S6
S7
S8
S9
S10
Bit2
Bit1
Bit0
A
A
B
B
B
B
B
-
0
1
A
B
A
B
B
B
B
B
-
A
B
B
B
B
B
-
1
0
SG1
1V
P-P
B
-
B
A
B
B
B
B
-
1
1
-
B
A
B
B
B
B
-
1
0
-
B
B
B
A
B
B
-
1
1
C
A
B
B
B
A
B
B
-
0
1
B
B
B
B
A
B
B
SG6
2V
P-P
-
-
B
B
B
B
B
A
-
1
1
SG5
2V
P-P
-
-
B
B
B
B
A
B
-
1
1
SG2
1V
P-P
-
B
B
B
A
B
B
B
-
0
1
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