MM1231

MITSUMI 2-Input 1-Output 3-Circuit Video Switch MM1231~1234 2-Input 1-Output 3-Circuit Video Switch Monolithic IC MM1231~1234 Outline This is serial 2-input, 1-output, 3-circuit video switch IC for video / audio signal switching with and without clamp circuit. Circuit configuration tables and block diagrams are as follows. MM1234 is used as the representative model in this description. MM1231~MM1234 Series Circuit Configuration Table Model name MM1231 MM1232 MM1233 MM1234 # of Inputs 2 2 2 2 # of Outputs 1 1 1 1 Clamp circuit No 1 input 2 input 3 input Power supply voltage 4.6~13.0V 4.6~13.0V 4.6~13.0V 4.6~13.0V MM1231~MM1234 Input/Output Voltage Measurement Values (typ.) Model name Input / Output voltage Input voltage Output voltage Input voltage MM1232 Output voltage Input clamp Output voltage Input voltage MM1233 Output voltage Input clamp Output voltage MM1234 Input clamp Output voltage Power supply voltage 5V 2.80 2.01 2.80 2.10 1.40 0.70 2.80 2.10 1.40 0.70 1.40 0.70 9V 5.00 4.30 5.00 4.30 2.50 2.20 5.00 4.30 2.50 2.20 2.50 2.20 12V 6.70 6.00 6.70 6.00 3.30 2.90 6.70 6.00 3.30 2.90 3.30 2.90 Unit V V V V V V V V V V V V MM1231 MITSUMI 2-Input 1-Output 3-Circuit Video Switch MM1231~1234 Block Diagram MM1231 (MM1231~MM1234) MM1232 MM1233 MM1234 Control input truth table SW L OUT IN1A IN2A IN3A IN1B H IN2B IN3B MITSUMI 2-Input 1-Output 3-Circuit Video Switch MM1231~1234 Introduction of Main Model 2-Input 1-Output 3-Circuit Video Switch Monolithic IC MM1234 Outline This is a video switch for video signal switching, with 2-input and 1-output circuits built in. All three circuits have a clamp function. Features 1. 2. 3. 4. 5. 6. 3 circuits built in, 2-input and 1-output Clamp function Current consumption Operating power supply voltage range Frequency response Crosstalk 9.0mA typ. 4.6~13.0V 10MHz 70dB (at 4.43MHZ) Package SOP-16B DIP-16B Applications 1. TV 2. VCR 3. Other video equipment MITSUMI 2-Input 1-Output 3-Circuit Video Switch MM1231~1234 Pin Description Pin no. 16 1 11 14 8 9 Pin name IN1A IN1B IN2A IN2B IN3A IN3B Function Input Internal equivalent circuit diagram 2 12 7 SW1 SW2 SW3 Switch 3 5 6 OUT1 OUT2 OUT3 Output 13 15 4 10 VCC GND1 GND2 GND3 Power supply Ground MITSUMI 2-Input 1-Output 3-Circuit Video Switch MM1231~1234 Absolute Maximum Ratings Item Storage temperature Operating temperature Power supply voltage Allowable loss (Ta=25°C) Symbol TSTG TOPR VCC Pd Ratings -40~+125 -20~+75 15 350 (SOP-16B) 1200 (DIP-16B) Units °C °C V mW Electrical Characteristics Item (Except where noted otherwise, Ta=25°C, VCC=5.0V) Symbol VCC Id GV FC DG DP Voff CT VIH VIL Ro Measurement conditions Refer to Measuring Circuit Refer to Measuring Circuit Refer to Measuring Circuit Refer to Measuring Circuit Refer to Measuring Circuit Refer to Measuring Circuit Refer to Measuring Circuit Refer to Measuring Circuit Refer to Measuring Circuit Min. Typ. Max. Units 4.6 9.0 -0.5 -1 0 0 0 0 -70 2.1 0.7 25 13.0 11.7 +0.5 +1 ±3 ±3 ±15 -60 V mA dB dB % deg mV dB V V Ω Operating power supply voltage range Consumption current Voltage gain Frequency characteristic Differential gain Differential phase Output offset voltage Crosstalk Switch input voltage H Switch input voltage L Output impedance MITSUMI 2-Input 1-Output 3-Circuit Video Switch MM1231~1234 Measuring Procedures Item Symbol (Except where noted otherwise, VCC=5.0V, VC1=VCC, VC2=0V) Switch state Measuring Procedure S1 S2 S3 S4 S5 S6 S7 S8 Consumption 2 2 2 2 2 2 2 1 Connect a DC ammeter to the VCC pin and measure. The Id ammeter is shorted for use in subsequent measurements. current 1 2 2 2 2 2 2 1 Input a 2.0VP-P, 100kHz sine wave to SG, and 2 1 2 2 2 2 1 1 obtain Gv from the following formula given TP1 2 2 1 2 2 2 2 2 voltage as V1 and TP3 voltage as V2. Voltage gain GV 2 2 2 1 2 2 1 2 2 2 2 2 1 2 2 3 GV=20LOG (V2/V1) dB 2 2 2 2 2 1 1 3 1 2 2 2 2 2 2 1 For the above GV measurement, given TP3 2 1 2 2 2 2 1 1 voltage for 10MHz as V3, FC is obtained from Frequency 2 2 1 2 2 2 2 2 the following formula. Fc characteristic 2 2 2 1 2 2 1 2 2 2 2 2 1 2 2 3 FC=20LOG (V3/V2) dB 2 2 2 2 2 1 1 3 1 2 2 2 2 2 2 1 2 1 2 2 2 2 1 1 Input a 2.0VP-P staircase wave to SG, and 2 2 1 2 2 2 2 2 measure differential gain at TP3. Differential gain DG 2 2 2 1 2 2 1 2 APL=10~90% 2 2 2 2 1 2 2 3 2 2 2 2 2 1 1 3 1 2 2 2 2 2 2 1 2 1 2 2 2 2 1 1 2 2 1 2 2 2 2 2 Proceed as for DG, and measure differential Differential phase DP 2 2 2 1 2 2 1 2 phase. 2 2 2 2 1 2 2 3 2 2 2 2 2 1 1 3 2 2 2 2 2 2 2 1 2 2 2 2 2 2 1 1 Output offset 2 2 2 2 2 2 2 2 Measure the DC voltage difference at TP2 for Voff voltage 2 2 2 2 2 2 1 2 each switch for VC1 and VC2. 2 2 2 2 2 2 2 3 2 2 2 2 2 2 1 3 1 2 2 2 2 2 1 1 Assume VC1=2.1V, VC2=0.7V. Input a 2.0VP-P, 2 1 2 2 2 2 2 1 4.43MHz sine wave to SG, and given TP1 2 2 1 2 2 2 1 2 voltage as V4 and TP3 voltage as V5, CT is Crosstalk CT 2 2 2 1 2 2 2 2 obtained from the following formula. 2 2 2 2 1 2 1 3 CT=20LOG (V5/V4) dB 2 2 2 2 2 1 2 3 2 2 2 2 2 2 1 1 Impress an optional DC voltage on TP5 7, 9 and Switch input VIH 2 2 2 2 2 2 1 2 TP6, 8 and 10. Gradually raise from VC1=0V. voltage H 2 2 2 2 2 2 1 3 TP4 voltage when TP6, 8, 10 voltage is output 2 2 2 2 2 2 1 1 on TP2 is VIH. Gradually lower from VC1=VCC. Switch input VIL 2 2 2 2 2 2 1 2 TP4 voltage when TP5, 7, 9 voltage is output on voltage L 2 2 2 2 2 2 1 3 TP2 is VIL. MITSUMI 2-Input 1-Output 3-Circuit Video Switch MM1231~1234 Measuring Circuit