MM1238

MITSUMI 3-Input 2-Output 3-Circuit Video Switch MM1238 3-Input 2-Output 3-Circuit Video Switch Monolithic IC MM1238 Outline July 5, 1993 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 1 2 3 4 5 6 7 8 9 10 11 SDIP-22P 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 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 MITSUMI 3-Input 2-Output 3-Circuit Video Switch MM1238 Block Diagram SW Logic Control input C11 L L H H C12...