MITSMI MM1238XD Datasheet
MITSUMI
3-Input 2-Output 3-Circuit Video Switch MM1238
3-Input 2-Output 3-Circuit Video Switch
Monolithic IC MM1238
Outline
This IC is a video switch developed for large and medium-sized high quality TVs, with 3-input and 2-output
circuits. It is suitable for BS, JSB, CS or M-N (Muse NTSC conversion) comparator switching. The BS-CS
decoder can be used as a W decoder.
Features
1. One of the two video signal outputs is for external output, and has a 6dB amp, 75Ω, 1VP
-
P
2. Input impedance
Video circuits 1~3
15kΩ
Audio circuits 1~3
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. Power supply voltage 8.0V~13.0V
Package
SDIP-22A (MM1238XD)
Applications
1. TV
2. Free-standing VCR
3. Other video equipment
Pin Assignment
SDIP-22P
136924587
10 11
22 18 1521 19 17 16 1420 1213
Pin no. Pin name Function Pin no. Pin name Function
1 L
IN1 Audio LIN1 12 C21 SW2 control
2 V
IN1 Video IN1 13 ROUT2 Audio ROUT2
3 R
IN1 Audio RIN1 14 VOUT2 Video OUT2
4 C11 SW1 control 15 L
OUT2 Audio LOUT2
5 L
IN2 Audio LIN2 16 GND GND
6 V
IN2 Video IN2 17 C22 SW2 control
7 R
IN2 Audio RIN2 18 VCC Power supply
8 C12 SW1 control 19 R
OUT1 Audio ROUT1
9 L
IN3 Audio LIN3 20 LOUT1 Audio LOUT1
10 V
IN3 Video IN3 21 VOUT1 Video OUT1
11 R
IN3 Audio RIN3 22 SAG Sag pin
MITSUMI
3-Input 2-Output 3-Circuit Video Switch MM1238
Block Diagram
Control input Output signal
C11 C12 V
OUT1ROUT1LOUT1
L L Mute Mute Mute
L H VIn1 RIn1 LIn1
H L VIn2 RIn2 LIn2
H H VIn3 RIn3 LIn3
Control input Output signal
C21 C22 V
OUT2ROUT2LOUT2
L L Mute Mute Mute
L H VIn1 RIn1 LIn1
H L VIn2 RIn2 LIn2
H H VIn3 RIn3 LIn3
SW Logic
Absolute Maximum Ratings
(Ta=25°C)
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 800 mW
Loading...