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PDF MM1238 Data sheet ( Hoja de datos )
| Número de pieza | MM1238 | |
| Descripción | 3-Input 2-Output 3-Circuit Video Switch | |
| Fabricantes | Mitsumi Electronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MM1238 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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MITSUMI
3-Input 2-Output 3-Circuit Video Switch MM1238
3-Input 2-Output 3-Circuit Video Switch
Monolithic IC MM1238
July 5, 1993
Outline
This IC is a video switch IC developed for high-end large/medium TVs incorporating three 3-input 2-output
circuits. It is ideal for switching BS/JSB/CS or M-N converters (mute to NTSC conversion). The BS-CS
decoder can be used as a W decoder.
Features
1. One of the two video signal outputs is used for external output, and has a 6dB amp, 75Ω, 1VP-P
2. Input impedance
1~3 video circuits
15kΩ
1~3 audio circuits
68kΩ
3. Crosstalk
Video
-60dB (at 4.43MHz)
Audio
-80dB (at 1kHz)
Video : Audio
-70dB (at 100kHz)
4. Frequency response
10MHz (6dB, 75Ω, amp only, 7MHz)
5. Supply voltage
8.0~13.0V
Package
SDIP-22A (MM1238XD)
www.DataSheet4U.com
Applications
1. TV
2. Free-standing VCR
3. Other video equipment
Pin Assignment
22 21 20 19 18 17 16 15 14 13 12
Pin no.
1
2
3
4
5
6
7
8
9
10
11
Pin name
LIN1
VIN1
RIN1
C11
LIN2
VIN2
RIN2
C12
LIN3
VIN3
RIN3
1 2 3 4 5 6 7 8 9 10 11
SDIP-22P
Function
Audio LIN1
Video IN1
Audio RIN1
SW1 control
Audio LIN2
Video IN2
Audio RIN2
SW1 control
Audio LIN3
Video IN3
Audio RIN3
Pin no.
12
13
14
15
16
17
18
19
20
21
22
Pin name
C21
ROUT2
VOUT2
LOUT2
GND
C22
VCC
ROUT1
LOUT1
VOUT1
SAG
Function
SW2 control
Audio ROUT2
Video OUT2
Audio LOUT2
GND
SW2 control
Power supply
Audio ROUT1
Audio LOUT1
Video OUT1
Sag pin
1 page  
MITSUMI
3-Input 2-Output 3-Circuit Video Switch MM1238
*2 Crosstalk (RIN ROUT)
Input a 2.5VP-P, 1kHz sine wave to SG3.
Obtain CTRR using the following formula given output amplitude for combinations other than those below
for SW control pin as VO3, and for the combinations below as VO4.
CTRR=20 log (VO4/VO3) dB
1. CTRR1
2. CTRR2
Switch status
Measuring pin
S3 V1 V2 V3 V4
A L L LH
AHL LH
A HH L H
BL LHL
TP5 B L H H L
BHHH L
C L LHH
C LHHH
CH L HH
Measuring pin
TP1
Switch status
S3 V1 V2 V3
ALHL
A LHH
A LHH
BHL L
BHL L
BHLH
CHH L
CHH L
CHHH
V4
L
L
H
L
H
H
L
H
L
*3 Crosstalk (LIN LOUT)
Input a 2.5VP-P, 1kHz sine wave to SG3.
Obtain CTLL using the following formula given output amplitude for combinations other than those below
for SW control pin as VO5, and for the combinations below as VO6.
CTLL=20 log (VO6/VO5) dB
1. CTLL1
2. CTLL2
Switch status
Measuring pin
S1 V1 V2 V3 V4
A L L LH
AHL LH
A HH L H
BL LHL
TP6 B L H H L
BHHH L
C L LHH
C LHHH
CH L HH
Measuring pin
TP4
Switch status
S1 V1 V2 V3
ALHL
A LHH
A LHH
BHL L
BHL L
BHLH
CHH L
CHH L
CHHH
V4
L
L
H
L
H
H
L
H
L
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet MM1238.PDF ] | |
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