MITSUMI RGB Encoder Monolithic IC MM1268 Outline This IC converts analog RGB signals into chroma, Y+S and composite video signals. Features 1. Operates on 5V single power supply 2. Supports NTSC and PAL formats 3. Supports S (Y, C output) 4. 75Ω driver output (RGB output, Y, C output, composite video output) 5. Built-in BRF and delay circuits Package SOP-24A Applications 1. PCs 2. Game equipment 3. Other video equipment Equivalent Circuit Diagram RGB Encoder MM1268 RGB Encoder MM1268 MITSUMI Pin Description Pin no. Pin name Function 1 GND1 2 RIN RGB input pins 3 GIN Maximum input voltage is 1VP-P 4 BIN DC level is 2V during clamp 5 NC OPEN 6 SCIN Subcarrier input pin Input a 0.4V~5VP-P sine wave 7 NTSC/PAL Mode setting pin NTSC : VCC PAL : GND 8 BFPOUT Burst flag pulse monitor pin Internal equivalent circuit diagram RGB Encoder MM1268 MITSUMI 9 Yclp Connects to capacitor for Y signal clamp 10 SYNCIN 11 NC 12 VCC1 13 Iref Composite sync signal input pin OPEN Determines internal reference current Connect a 47kΩ resistor between this pin and ground 14 Vref Internal reference voltage pin Reference voltage is 4V Connect a 10µF capacitor between this pin and ground. RGB Encoder MM1268 MITSUMI 15 COUT Chroma signal output pin 16 YOUT Luminance signal output pin Able to drive 75Ω load 17 Ytrp Connects to trap for removing subcarrier frequency component in VIDEO output luminance signal 18 f0 Determines filter and delay circuit f0 NTSC : 20k PAL : 16k 19 VCC2 20 VIDEO OUT Output stage power supply Composite video signal output pin Able to drive 75Ω load RGB Encoder MM1268 MITSUMI 21 BOUT RGB signal output pin 22 GOUT Able to drive 75Ω load 23 ROUT 24 GND2 Output stage GND Absolute Maximum Ratings (Ta=25°C) Item Symbol Ratings Units Storage temperature TSTG -40~+125 °C Operating temperature TOPR -20~+75 °C Power supply voltage VCC max. +7 V 720 mW Allowable loss Pd *1 * Note : 1 Loss tolerance when garaepo board is mounted. (25.0 75.0 0.8mm garaepo board) Recommended Operating Conditions Item Symbol Ratings Units Operating temperature TOPR -20~+75 °C Operating voltage VOP 4.75~5.25 °C RGB Encoder MM1268 MITSUMI Electrical Characteristics Item (Ta=25°C, VCC=1, 2=5V) Symbol Measurement circuit Consumption current 1 ICC1 Consumption current 2 ICC2 RGB output characteristics ROUT, GOUT, BOUT R output voltage VR F G output voltage VG E B output voltage VB D Rf characteristic fR F Gf characteristic fG E Bf characteristic fB D Brightness output characteristic YOUT, VIDEOOUT Sync level Y(S) Red brightness level Y(R) Green brightness level Y(G) B/C Blue brightness level Y(B) White brightness level Y(W) fY(R) Brightness f characteristic fY(G) B/C fY(B) Chroma output characteristic COUT, VIDEOOUT NTSC Burst level CL(b) Red level ratio CL(R) Red phase CP(R) Green level ratio CL(G) A/C Green phase CP(G) Blue level ratio CL(B) Blue phase CP(B) PAL Burst -1 level CL(b1) Burst -1 phase CP(b1) Burst -2 level CL(b2) Burst -2 phase CP(b2) Red-1 level ratio CL(R1) Red-1 phase CP(R1) Red-2 level ratio CL(R2) Red-2 phase CP(R2) A/C Green -1 level ratio CL(G1) Green -1 phase CP(G1) Green -2 level ratio CL(G2) Green -2 phase CP(G2) Blue -1 level ratio CL(B1) Blue -1 phase CP(B1) Blue -2 level ratio CL(B2) Blue -2 phase CP(B2) NTSC/PAL Burst position td A/C Burst width tw Carrier lea VL A/C Measurement conditions, SW conditions (S1, S2, S3, S4, S5, S6, S7) V4 : SG6 V5 : SG8 SW conditions (0, 0, 0, 0, 0, 0, 0) Min. Typ. Max. Units 31 17 40 22 mA mA V1, 2, 3 : SG1 SW conditions (1, 1, 0, 0, 1, 1, 0) 0.64 0.71 0.78 VP-P V1, 2, 3 : SG2/SG1 SW conditions (1, 1, 0, 0, 1, 1, 0) -3.0 V1 : SG3 V2 : SG4 V3 : SG5 V4 : SG6 V5 : SG8 SW conditions (1, 0, 0, 0, 0, 0, 0) 0.26 0.17 0.35 0.065 0.6 V1, 2, 3 : SG2/SG1 SW conditions (1, 1, 0, 0, 1, 1, 0) -3.0 0.25 3.16 104 2.95 241 2.24 347 0.3 3.48 114 3.25 251 2.47 357 VP-P V1 : SG3 V2 : SG4 V3 : SG5 V4 : SG6 V5 : SG8 SW conditions (1, 0, 0, 0, 0, 0, 0) 0.2 2.84 94 2.65 231 2.01 337 0.2 125 0.2 215 2.84 94 2.84 246 2.65 231 2.65 109 2.01 337 2.01 3 0.25 135 0.25 225 3.16 104 3.16 256 2.95 241 2.95 119 2.24 347 2.24 13 0.3 145 0.3 235 3.48 114 3.48 266 3.25 251 3.25 129 2.47 357 2.47 23 VP-P deg VP-P deg 0.4 2.5 0.6 0.75 2.75 3.2 V1 : SG3 V2 : SG4 V3 : SG5 V4 : SG6 V5 : SG8 SW conditions (1, 0, 0, 1, 0, 0, 1) V1 : SG3 V2 : SG4 V3 : SG5 V4 : SG6 SW conditions (1, 0, 0, 1, 0, 0, 1) V1~3 : no signal, V4 : SG6 SW conditions (1, 0, 0, 1, 0, 0, 1) dB 0.29 0.21 0.42 0.08 0.71 0.33 VP-P 0.26 V 0.49 V 0.095 V 0.82 V dB 20 deg deg deg deg deg deg deg deg deg µS µS mVP-P RGB Encoder MM1268 MITSUMI Input conditions Symbol Signal SG1 Sine wave, 1VP-P, f=200kHz SG2 Sine wave, 1VP-P, f=5MHz SG3 Color bar (100%) R signal SG4 Color bar (100%) G signal SG5 Color bar (100%) B signal SG6 Sine wave, 0.5VP-P, f=3.58MHz SG7 Sine wave, 0.5VP-P, f=4.43MHz SG8 0.8V-2.0V, composite, sync signal Measuring Circuit 1V SG3 0V 1V SG4 0V 1V SG5 0V 2V SG8 4.5µ 0.8V 64µ SW conditions : (0,0,0,0,0,0,0) for the circuit illustrated below