Pedestal Clamp 2-Input 1-Output 3-Circuit Video Switch MM1389 MITSUMI Pedestal Clamp 2-Input 1-Output 3-Circuit Video Switch Monolithic IC MM1389 Outline This is a video switch IC developed for use in video cameras, with 2-input and 1-output circuits. It has pedestal clamp input, making it ideal for RGB and video signal switching, Features 1. 2. 3. 4. Pedestal clamp input Low current consumption Frequency response Operating power supply voltage 12mA typ.(VCC5V) 10MHz typ. 0dB 4.5~12V Package SOP-16B (MM1389XF) Applications 1. TV 2. VCR 3. Other video equipment Block Diagram Control input truth table SW L H OUT IN2a IN2b IN2c IN1a IN1b IN1c Pedestal Clamp 2-Input 1-Output 3-Circuit Video Switch MM1389 MITSUMI Pin Description Pin no. Pin name Function 1 IN2a Input pin 2SWa 8 IN2c Input pin 2SWc 9 IN1c Input pin 1SWc 11 IN1b Input pin 1SWb 14 IN2b Input pin 2SWb 16 IN1a Input pin 1SWa 2 CTLa Switching pin a 7 CTLb Switching pin b 12 CTLc Switching pin c 3 OUTa Output pin SWa 5 OUTb Output pin SWb 6 OUTc Output pin SWc 4 GND GND pin 1 15 GND GND pin 2 10 CLAMP PULSE Clamp pulse input pin 13 VCC Power supply voltage pin Internal equivalent circuit diagram Pedestal Clamp 2-Input 1-Output 3-Circuit Video Switch MM1389 MITSUMI Absolute Maximum Ratings (Ta=25°C) Item Symbol Ratings Units Storage temperature TSTG -40~+125 °C Operating temperature TOPR -25~+75 °C Power supply voltage VCC max. 15 V Allowable loss Pd 350 mW Recommended Operating Conditions Item Symbol Ratings Units Operating temperature TOPR -25~+75 °C Operating voltage VOP 4.5~12.0 V Electrical Characteristics (Except where noted therwise, Ta=25°C, VCC=5.0V) Item Symbol Measurement conditions Consumption current ID Refer to Measuring Circuit Voltage gain GV Refer to Measuring Circuit Frequency characteristic FC Dynamic range 1 Min. Typ. Max. Units 12.0 17.0 mA -0.5 0 +0.5 dB Refer to Measuring Circuit -1 0 +1 dB VD1 Refer to Measuring Circuit 1.40 1.65 VP-P Dynamic range 2 VD2 Refer to Measuring Circuit 0.80 0.95 VP-P Crosstalk CT Refer to Measuring Circuit Switch input voltage H VIH Refer to Measuring Circuit Switch input voltage L VIL Refer to Measuring Circuit Clamp pin input voltage H VCTH Refer to Measuring Circuit Clamp pin input voltage L VCTL Refer to Measuring Circuit VD1 : Positive dynamic range (from clamp level) VD2 : Negative dynamic range (from clamp level) -70 -60 2.1 dB V 0.7 2.1 V V 0.7 V Pedestal Clamp 2-Input 1-Output 3-Circuit Video Switch MM1389 MITSUMI Measuring Procedures Item Symbol Consumption current ID Voltage gain Frequency characteristic GV FC (Except where noted otherwise, VCC=5.0V, VC1=VCC, VC2=0V, PULSE=VCC, C1~C6=0.1µF, impress VB=3.5V when S9 is 2) Switch state S9 S10~S15 Notes S1 S2 S3 S4 S5 S6 S7 S8 2 2 2 2 2 2 2 2 1 2 1 2 2 2 2 2 1 1 2 1 2 1 2 2 2 2 2 1 2 1 2 2 1 2 2 2 1 2 2 1 2 2 2 1 2 2 2 2 2 1 2 2 2 2 1 2 1 3 2 1 2 2 2 2 2 1 2 3 2 1 1 2 2 2 2 2 1 1 2 1 2 1 2 2 2 2 2 1 2 1 2 2 1 2 2 2 1 2 2 1 2 2 2 1 2 2 2 2 2 1 2 2 2 2 1 2 1 3 2 1 2 2 2 2 2 1 2 3 2 1 1 2 2 2 2 2 1 1 1 2 2 1 2 2 2 2 2 1 1 2 dynamic range (from VD1: Positive Dynamic VD1 2 2 1 2 2 2 1 2 1 2 clamp level) range 1, 2 VD2 2 2 2 1 2 2 2 2 1 2 VD2: Negative 2 2 2 2 1 2 1 3 1 2 dynamic range (from 2 2 2 2 2 1 2 3 1 2 1 2 2 2 2 2 1 1 2 1 2 1 2 2 2 2 2 1 2 1 2 2 1 2 2 2 1 2 2 1 2 2 2 1 2 2 2 2 2 1 2 2 2 2 1 2 1 3 2 1 2 2 2 2 2 1 2 3 2 1 1 2 2 2 2 2 1 1 2 1, 2 2 2 1 2 2 2 1 2 2 1, 2 Crosstalk CT Switch input VIH 2 2 2 2 1 2 1 3 2 1, 2 voltage H, L VIL 2 1 2 2 2 2 1 1 2 1, 2 2 2 2 1 2 2 1 2 2 1, 2 2 2 2 2 2 1 1 3 2 1, 2 2 2 2 2 2 2 1 1 2 1 2 2 2 2 2 2 1 2 2 1 2 2 2 2 2 2 1 3 2 1 Clamp pin input VCTH voltage H, L VCTL clamp level) Pedestal Clamp 2-Input 1-Output 3-Circuit Video Switch MM1389 MITSUMI (Except where noted otherwise, VCC=5.0V, VC1=VCC, VC2=0V, PULSE=VCC, C1~C6=0.1µF, impress VB=3.5V when S9 is 2) Item Symbol Consumption current ID Measurement conditions Notes Connect a DC ammeter to the VCC pin and measure. The ammeter is shorted for subsequent measurements. Input a 2.0VP-P, 100kHz sine wave to SG, and obtain Voltage gain GV GV from the following formula given TP1 voltage as V1 f=100kHz and TP3 voltage as V2. V=2.0VP-P GV=20Log (V2/V1) dB For the above GV measurement, given TP3 voltage for Frequency characteristic FC 10MHz as V3, FC is obtained from the following formula. FC=20Log (V3/V2) dB 10MHz/100kHz V=2.0VP-P Input a video signal to SG and a 5VP-P clamp pulse to PULSE. Given input amplitude on the positive side of clamp level VC Dynamic range 1, 2 VD1 VD2 as VD1IN, and output amplitude as VD1OUT and negative side input amplitude as VD2IN, and output amplitude as VD2OUT, VD2 is obtained from the following formula. VD1 : 20Log (VD1OUT/VD1IN) <= VD1IN for-1dB VD2 : 20Log (VD2OUT/VD2IN) <= VD2IN for-1dB Input a 2.0VP-P, 4.43MHz sine wave to SG, and given Crosstalk CT TP1 voltage as V4 and TP3 voltage as V5, CT is f=4.43MHz obtained from the following formula. V=2.0VP-P CT=20Log (V5/V4) dB Make S10, S12 and S14 1, and S11, S13 and S15 2. Input a 2.0VP-P, 100kHz sine wave to SG, and raise Switch input voltage H, L VIH gradually from VC1=0V. TP4 voltage when the SG VIL signal appears on TP2 is VIN. Next, reverse S10~S15 settings and lower gradually from VC1=VCC. TP4 voltage when the SG signal appears on TP2 is VIL. Impress 4V on VB and raise gradually from Clamp pin input voltage H, L VCTH PULSE=0V. TP11 voltage when less than 2.0V appears VCTL on TP2 is VCTH. Lower from PULSE=VCC, and TP11 voltage when more than 2.2V appears on TP2 is VCTL. MITSUMI Measuring Circuit Pedestal Clamp 2-Input 1-Output 3-Circuit Video Switch MM1389 MITSUMI Application Circuits Pedestal Clamp 2-Input 1-Output 3-Circuit Video Switch MM1389