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| MITSUMI RGB Encoder MM1268 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. 75 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 MITSUMI RGB Encoder MM1268 Pin Description Pin no. 1 2 3 4 Pin name GND1 RIN GIN BIN RGB input pins Maximum input voltage is 1VP-P DC level is 2V during clamp Function Internal equivalent circuit diagram 5 6 NC SCIN OPEN 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 MITSUMI RGB Encoder MM1268 9 Yclp Connects to capacitor for Y signal clamp 10 SYNCIN Composite sync signal input pin 11 12 13 NC VCC1 Iref OPEN Determines internal reference current Connect a 47k resistor between this pin and ground 14 Vref Internal reference voltage pin Reference voltage is 4V Connect a 10F capacitor between this pin and ground. MITSUMI RGB Encoder MM1268 15 16 COUT YOUT Chroma signal output pin Luminance signal output pin Able to drive 75 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 20 VCC2 VIDEO OUT Output stage power supply Composite video signal output pin Able to drive 75 load MITSUMI RGB Encoder MM1268 21 22 23 BOUT GOUT ROUT RGB signal output pin Able to drive 75 load 24 GND2 Output stage GND Absolute Maximum Ratings Item Storage temperature Operating temperature Power supply voltage Allowable loss (Ta=25C) Symbol TSTG TOPR VCC max. Pd Ratings -40~+125 -20~+75 +7 720 75.0 Units C C V mW 0.8mm garaepo board) *1 Note : 1 Loss tolerance when garaepo board is mounted. (25.0 * Recommended Operating Conditions Item Operating temperature Operating voltage Symbol TOPR VOP Ratings -20~+75 4.75~5.25 Units C C MITSUMI RGB Encoder MM1268 Electrical Characteristics Item (Ta=25C, VCC=1, 2=5V) Measurement conditions, SW conditions (S1, S2, S3, S4, S5, S6, S7) V4 : SG6 V5 : SG8 SW conditions (0, 0, 0, 0, 0, 0, 0) V1, 2, 3 : SG1 SW conditions (1, 1, 0, 0, 1, 1, 0) V1, 2, 3 : SG2/SG1 SW conditions (1, 1, 0, 0, 1, 1, 0) Symbol Measurement circuit Min. Typ. Max. Units 31 17 40 22 mA mA 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 0.64 0.71 0.78 VP-P -3.0 0.26 0.17 0.35 0.065 0.6 -3.0 0.29 0.21 0.42 0.08 0.71 dB 0.33 VP-P 0.26 V 0.49 V 0.095 V 0.82 V dB V1 : SG3 V2 : SG4 V3 : SG5 V4 : SG6 V5 : SG8 SW conditions (1, 0, 0, 0, 0, 0, 0) V1, 2, 3 : SG2/SG1 SW conditions (1, 1, 0, 0, 1, 1, 0) 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 0.4 2.5 0.25 3.16 104 2.95 241 2.24 347 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 3.48 114 3.25 251 2.47 357 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 deg deg VP-P deg VP-P deg deg deg deg deg deg deg S S mVP-P 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) 0.6 0.75 2.75 3.2 20 MITSUMI Input conditions Symbol SG1 SG2 SG3 SG4 SG5 SG6 SG7 SG8 Signal Sine wave, 1VP-P, f=200kHz Sine wave, 1VP-P, f=5MHz Color bar (100%) R signal Color bar (100%) G signal Color bar (100%) B signal Sine wave, 0.5VP-P, f=3.58MHz Sine wave, 0.5VP-P, f=4.43MHz 0.8V-2.0V, composite, sync signal SG8 4.5 64 SG4 SG5 RGB Encoder MM1268 1V SG3 0V 1V 0V 1V 0V 2V 0.8V Measuring Circuit SW conditions : (0,0,0,0,0,0,0) for the circuit illustrated below |
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