M51272FP

M51272P MITSUBISHI | Alldatasheet

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MITSUBISHI ICs (AV COMMON) NTSC/PAL ENCODER

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‘The M51272P/FP isasemiconductor integrated circuit designed GURATION (TOP VIEW) for color signal modulation. It consists of RY and B-Y input signal clamp circuits,burst signal mixing,chroma modulator, ‘by covoun oirenence meur [7] [24] BifERENCE iweur YIC mixing amplifier,sync adder and video signal output | &Y cLawe caracrton [2] [23] ry cLawp capacrtor amplifier. ‘BURST FLAG PULSE wPUT [22] PUL Se EAS by cannien saLance [4] FY CARRIER BALANCE FEATURES socwocymeur [5] fg} scvoo ey mrur ‘@ Low power dissipation(Voc=5.0V, Icc=30mA typ.) rerencice rowen umm [6] [79] ano © Suitable for both NTSC and PAL. owen sup a eee © Adjustable carrier balance, _ LMnance stonaL weur [8] i CLAMP PULSE INPUT @ able to mute luminance signal and color individually. LUMINANCE sana v © Built-in 75 ohm load driver. Sta SR RSIS [8 pil pases rate er - cHROwA sianaL eur [To] fis] goueoans Srvc APPLICATION ser ur cevet. [11] VIDEO SiQNAL OUTPUT NTSCIPAL color TV sets and VCR. wana amp oureur [12] [23] woe aup FeEDeAck RECOMMENDED OPERATING CONDITION outine 24P40(P) BLOCK DIAGRAM CLAMP.G BEPIN CAR BAL RYIN (RY) (RY) “(RY SC (@D) IN GND, CHROMAOUT CIN —_LKIN.C.SYNG IN VIDEO OUT FEED BACK | GS HEH=! ; | | Mi | | 1 Ei | Ea re | Ci 7 | [ recs fof Be feo] Ea | B-YIN cram c ae CAR aL loo CLAP c (CHROMA IN SET MgpMP. — SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSMMMMMFhFeFesFeFMeses @@ 62498eb 0021131 T70 MITSUBISHI 2~64 PRES,

MITSUBISHI ICs (AV COMMON) NTSC/PAL ENCODER ABSOLUTE MAXIMUM RATINGS [-Symoot T Parameter dang 0] | voc | suppyvetage | Pd | Power consumption _ 1000(P)/S00(FP) mw Operating temperature ‘Storlg ambient temperature [| __=ao~1a5 Te | [ke [Hestredustonrate i 0,008) Lm | ELECTRICAL CHARACTERISTICS (Ta=25'C, unless otherwise noted) DC CHARACTERISTICS “Teot conditions Test cicut mts [ one | a Te To] | OC bias alone [2i [2s tas Tv | | v2 [Vottage atterminal 2 | «OC bias alone | pe [is [20 fv | | v3 _[Vottage atterminat3 [SC bias atone | [27 [ee tary Vv] | V5 | Voltage at terminat5 DC bias alone [34 [36 [se |v | | v6 [Votage atterminal6 +f DG bias atone 28 [a0 [a2 |v] | v8 [Voltage et termina8 | DC bias alone | 25 | vo [Voltage attermneigs [oc biaseione |g Ce Pe Pet [Vid | Voltage at terminal 10 ze [30 [32] v | | vi2 | Voltage at terminal 12 | _ DC bias atone | [ue [eeTas tv | | vid | Voitage at terminal 14 DG bias alone 20 [23 |v] [vis [Voltage at termina ta | DC bias lone a1 [se | | v2 [Voltage at terminal 20 | ——~—G bles alone ——| [34 | 36 | 30 | Voltage at terminal 22 DC bias alone [27 [20 Tart v | | v23 | Vottage at terminal 23 DC bias alone [ue [re [aol v | Lv24 [Voltage atterminal 24 | bias atone | [2i [2s Teas]; Vv] INPUT TERMINAL CHARACTERISTICS (stendtra) |_win. [tye. | Max_| [OD [Resistor ae [2 | ka | | @ [Resistor ev [2s | Ka | | © [open base (NPN) [Not speciteg | ams a a] |} © [Resistor ev io as Pa] | © | Resistor kav | | is [7 20 [2s | ka | | @ [Resistor | 6 [75 | Ka | |__@ [Open base (NPN) | Not speciiea | ——Sitmev [3 [ea | | —@ [Open base (NPN) [Not apecitied | —vismsv———] | 1 | pn] Oren ove on) wen | we pecia | — “rec ete | @ "Open base (NPN) | Not specitied | _viI=5v es ee | —@ [Resistor va to a Ke | @ | Open base (NPN) Not specified v2i=3v_ a Resistor 2.9v— — [Ka | OUTPUT TERMINAL CHARACTERISTICS a ee | @ | Emits toiowor (NPN) _ Ammeter between 12 pin and Veo | Yeo [200 [240 | na [-@ [miter totower (NPN) ‘Ammetor between 18 pin and Veo ee M@@ 6249826 0021132 907 MITSUBISHI ae MISES 2-65 cae ennncce ee

MITSUBISHI ICs (AV COMMON) NTSC/PAL ENCODER — eS Eee ‘AC CHARACTERISTICS a There Shall not be any abnor- VocR Operating supply voltage range | mal operation in the standard 5.0 v = application circuit Pind terminal voltage shall be Carrier balance DC voltage | variable. Carrier leakage shall 29] 30] 31 be minimum. | Gmb | % | Demodulation output __ | $G1 200mVer input [S00 |" 660 | 760 | mver | [net ety ranctricn | S01 200mVr0,AOOmvnr | p=] of ef * | Pin21 terminal voltage shall be cer ‘Camter balance DC vottage | variable. Carrier leakage shall 29] 30 v be minimum. | Gmr "| > | Demodulation output | SGI 200mVe-r input | s00 [600 [700 | mvrw _| & ‘SGI 200mVe.r, 400mVee [=s[ os | Sub. rier i ‘SG2 output level shall be -corrier input range | veianig. B-Y, R-Y demodulation gain ratio | [ oe} if 12y = | [on [esmraieaneretmnany | ity” 7 Mere: Pee |= | ¢| 0] ao | FP i — itp z Burst output level when BFP is z R-Y burst gain Ve. impr @ | 8-Y burst input SC GATE foo | 8 [= fel | g [Gem | SG3 APL 100% input 20mVrw [7[ | nf «| >= ‘SG3200mVe.r, 400mVe-0 [ =s{ of ss] % | Fs Frequency which changes GY to —3dB. [ac | [Gain SGA IMHz, 200mVe° | [7] st ny ‘SG4 1MHz, 200mVep, 400mVe-r [=s[ of st % | [aT g | See sam 1009, Zoomer =z, of ae _] 3 ho. ‘ ‘SG3 APL 100% Output level vi Oly G | Output dynamic range | shat be variable. ad Pin}1 terminal voltage shall be Pinl5 terminal voltage shall be ; | Synchronizing level 15 Pin synchronizing pulse input [480 [600 [750 | mv | sya | 5 | Delay time 1 | 15 Pin synchronizing pulse input eo [= = [200 | ns | sv2__| ® [Detaytime 2 [15 Pin synonronizing pulse input (== 200 [ne] K Blanking pulse Y system | Pin16 terminal voltage shall be BLKytn threshold variable. ® | Blanking pulse C system | Pinl6 terminal voltage shall be BLKeth F threshold variable. a7 2 [BY blanking cartier leakage | Sub-carrier input, 16pin : OV, BV [= [=| =a [as | > [RLY blanking cartier leakage | Sub-carrier input, 16pin : OV, BV [ = | = | =a | af | Svsp_ | Signal input, 16pin : OV, SV [ =" [= | =a] as | am [tal | . Pini? terminal voltage shall be [ez] v | —_— eee M@® 6249826 0021133 643 MITSUBISHI 2-68 eine

MITSUBISHI ICs (AV COMMON) M51272P/FP NTSC/PAL ENCODER ——— OO Oo wr ELECTRICAL CHARACTERISTICS TEST METHOD lec, Vi~Van Each value read by ammeter or voltmeter is the measured value each measuring point. INPUT SIGNAL Wavetorm [7 Sangerg Remarks Jou Untess otherwise specitied, level shall | be 200mVe.r. ous 4,4336MH2, square Unless otherwise wave, duty 50%, specitied, output output level variable shall be 1V. ‘APL100% signal, output level variable Sine wave, frequency output level variable Shalt be Shall be close to synchronous with burat positions SGI and 3. Pos 5Y| shalt be c.SYNC synchronous with SGI and 3. av | shat be ux Sytonue wh Hosznt blanking | SGI and 3. ov} a SSsSSSSss @@ 6249826 0021134 737 MITSUBISHI Peles 2-67 a

MITSUBISHI ICs (AV COMMON) M51272P/FP TEST CIRCUIT A Vee : 6 7 1 v2a_|v23_ |va2 v20 vis OO®O ft © ) @) 12K +] 4] 47 3¥. + +) zz : # ee fea)_fes}_ fee] fex)_ feo} fro) _ fre) for} fas] fis] fia) fis] TRAToOewe oe ee ee o.22 147, (O72 QHDOODEOOODODO © vy iV. v3] VST V6 kc] VET VOT Vi0j vl TEST CIRCUIT B ‘s 20K 30K, VF21: 0.01 30K Messuring M22, point 18 + woe ok Namen Mal p 801 andt ad ysw22 Vows Ky " swi7 PAA AAPM Too eee ee 0.22 y 0.02 wah 0204: so4r—e3 ] I l S018 owt : ye yore eaurd Srp Joora todas 362 M3 20k 30K £0.01 u Unless otherwise specified, set SWs to 1 MB 62498eb 0021135 blb a pw 2-68 ELECTRIC OO

MITSUBISHI ICs (AV COMMON) M51272P/FP NTSC/PAL ENCODER B-Y,R-Y CARRIER BALANCE ADJUSTMENT B-Y: Set SW20 to 2.Adjust VF21 so that VM21 indicates approximately 3V.Input a square wave of 4.4MHz, 1Vp- P and duty 50% from SG2.Adjust VF4 so that 4.4MHz ‘component output at measuring point 18 reads minimum value. RLY: Set SWS to 2. Input a signal from SG2.Adjust VF21 So that 4.4MHz component output at measuring point Breads minimum value. CBb and CBr CBb and CBr represent readings of VM4 and 21 when carrier balance of each B-Y and R-Y is adjusted. Gmb and Gmr With carrier balance adjusted, set SW1,17 and 20 to 2.Gmb (mVp-p) represents the output value at measuring point 18 when inputting 200mVp-p from SG1. ‘Set SW5,17 and 24 to 2. Gmr (mVp-p) represents the output value at measuring point 18 when inputting 200mVp-p from sai. Lb and Lr With carrier balance adjusted, set SW1,17 and 20 to 2. In the following equation, A (mVp-p) represents output value at measuring point 18 when inputting 200mVp-p from SG-1C (mVp-prepresents output value when inputting 400mV. Lb=(C—2AV/2A(%) Set SW5,17 and 24 to 2. Determine BmBp-p(input 200mVp- p) and DmVp-p(input 400mV)according to above procedure. The following equation is obtained. Lr=(D—2B)/2B(%) —_ sg M@@ 6249826 0021136 552 a ane" ELECTRIC 2-69 ee

MITSUBISHI ICs (AV COMMON) M51272P/FP NTSC/PAL ENCODER —. ms in ree scth 7] r.COt*é~«~«d — input Adjust carrier balance and set SW3,5,16,17 and 24 to 2. V3(V) represents the voltage reading of VM3 at pin @ terminal. Set SWS to 3. Apply increasing voltage higher than V3 to pin @. Obseve the voltage at pin @ when the output level of measuring point : 18 satisfies Gmr standard. ‘Swb and Swr -Vs With the conditions as in 2) above,vary input level from SG2. Sothevsa— V3) ‘Swb and Swr represent the input level range in which each BLKeth A and B satisfies the standard. Adjust carrier balance and set SW1,17 and 20 to 2.input 200mVp-p from SG1. Observe output at measuring point 18, BR Set SW 16 to 3.Decrease terminal voltage at pin ® slowly From A and B obtained in 2), we get; from 5V. Set SW 16 to 3.BLKcth(V) represents the reading BREA of VM16 when output of measuring point 18 stops. aR AVeb and 4Ver ‘Set SW20 to 2, Adjust VF4 so that VM4 indicates approximately Set SW20to2. Adjust VF4 so that VM indicates approximately 3.5V(VM21:approximately 3V).ThusE(deg)representsthe phase __2V. (VM21 shall be in a carrier balance state). in the following difference between SG2 input phase and output phase of equation,Vcb: represents output level at measuring point 18 measuring point 18. Set SWS to 2(with other SWs at 1). Adjust when SW16 is set to 1. Vobe represents that of measuring \\VF21 so that VM21 indicates approximately 2.5V (VM4:appro- point 18 when SW16 is set to 2. ximately 3V). 4Vcb=20 log VebaVebi(dB) In the same manner determine the phase difference F(deg) between input and output.We then get; Set SW 5102. Adjust VF21 so that VM21 indicates approximately 2V. (VM4 shall be in.a carrier balance state). The resutting AR=E—F(deg) equation is; Gbb and Gbr 10 log Ve Adjust carrier balance and set SW3 and 201o2.V3(V) represents AVer=20 log VereNor(dB) the VM3 voltage reading at pin @ terminal.Set SW3 to 3.Adjust 4Vsb and 4 Ver VFS so that VM3 reads V3+1V. Gbb(mVp-p)represents output © Set SW1 to 3;SW5 and 20 to 2 adjusting carer balance. level at measuring point 18. Input 4.4336MHz, 200mVp-p from SG4.In the following Set SW5 and 22 to 2. V22(V) represents the voltage reading equation, Vsb: represents output level at measuring point 18 of VM22 at pin 22 terminal.Set SW 22 to 3. Adjust VF22 so when SW16 is set to 1.Vsbe represents that of measuring point that VM22 reads V22+1V. Follow the same procedure to 18 when SW16 is set to 2. determine Gor(mVp-p). 4Vsb=20 log Vsba/Vsb1(dB) Set SW 24 at 3;SW5 and 20 at 2: The resulting equation is; 4Vsr=20 log Vsre/Vsr1(dB) eee MM 6249626 0021137 499 MITSUBISHI 2-70 oases

MITSUBISHI ICs (AV COMMON) M51272P/FP NTSC/PAL ENCODER TEST CIRCUIT C Vee vais] YF + tk gyn loa koa oP 1 sox 4 ‘swig i ® 6 waves] LAP] LE Mesnsing wa] raf Point 14 OoLu= $30K }swi7 1 it 022, 4.7K 2 pols] fia) fel fs} fia) fis} LTR EW Ee by by ey + [0.01 O01 er 347 0.22, swio} ] Lemet al A 3 lost) att leasuring reoone 864863 4 Goin 22 VFL vty] +] it Resi 7 ‘Unit Resistance : 0 47 ui Foot Oude iP Unless otherwise specified, SWs shall be set to 1. Gy Ge Set SW8 and 17 to 2. Input an APL100% signal at SG3, In _ Set SW10 to 2;input 200mVp-p, MHz from SG4.n the following the following equation,G(mVp-p) represents the output level equation, | (mVp-p) represents the output level at measuring at measuring point 12. point 12. Gy=20 fog G/200(4B) Gc=20 log 1/200 (dB) ly Le as in 1),vary input level from SG3 into 400mVp-p. In the following as in 4),vary input level from SG4 into 400mVp-p. In the following ‘equation, H (mVp-p) represents the output level at measuring equation, J (mVp-p) represents the output level at measuring point 12 point 12. Bwy BWe Set SW to 3;input 200mVp-p from SG4 and vary frequency. Set SW10 to 2;input 200mVp-p from SG4 and vary frequency. BWr represents the frequency by which gain at measuring 8We represents the frequency by which gain at measuring point 12 becomes —3dB compared to Gy. Point 12 becomes —3dB compared to Gc. MM 624982b 0021138 325 MITSUBISHI ate MISES 2-71 a

MITSUBISHI ICs (AV COMMON) M51272P/FP NTSC/PAL ENCODER ee syth BLKyth Set SW15 to 3.Slowly decrease pin ® terminal voltage from Set SW16 to 3. Slowly decrease pin ® terminal voltage from. SV by adjusting VF15. Observe measuring point 14.SYth(V) _5V by adjusting VF16. Observe measuring point 12. BLKyth(V), tepresents the VM15 reading when DC voltage at measuring —_ represents the VM16 reading when pin ® terminal voltage point 14 decreases from 2V to approximately 1.5V. decreases from high (approximately 2.2V) to low (approximately 1V). SYLSYt and S¥tz Set SW15 to 2.Input C. Sync pulse. Determine SYi, SYt: and CPth ‘SYt at measuring point 14 as follows.(SW11 shall be set to Set SW17 to 3. Slowly decrease pin ® terminal voltage from 2. VF11=3V) SV using VF17. CPth represents the VM17 reading when voltage at measuring point 2 increases from low (approximately OV) 5v to high (approximately 2V). - -—fr- ow ov _ sve | Veo s¥u sy ° TEST CIRCUIT D Meesurin = point 1 20K BLK cag 375

7 XY 12K

0.01, 30K Yswis 3.6K ond a 47k fa) _f3)_ fj fei) ff fis} fie) fi] fie) fis] fi fy TROT e oOo ea ee a + T” uy 47 ue) Le Pre ses vias sos f ring 4 point 12 FAL vM 11) 0.014 47

7 Unit Resistance : 0

Cepacitance °F Unless otherwise specified, SWs shall be set to 1. oe M@™ 6249426 0021139 2b] ae 2-72 ELECTRIC

MITSUBISHI ICs (AV COMMON) M51272P/FP NTSC/PAL ENCODER Measurement of Gv DLv(Vp-p) represents the output level read just before the output Input APL100%, 200mVp-p from SG3.!n this state, Gv: and signal begins to show non-linear change. Gve represent output levels at measuring points 12 and 14 respectively. The resulting equation is; Measurement of SL _ Set SW11 and 16 to 2.Input APL100%, 200mVp-p from SG3. Gv=20 log GvalGvi(dB) Adjust VF11 so that output signal pedestal level becomes equal Measurement of DLV to the input signal level.In this condition, SL(V) represents the Input APL100% from SG3.Increase the input signal level while. VM11_ value. ‘observing measuring point 14. : Amplified by MAX AMP. Input from SG 3 Output at measuring point 12 ‘Set up unadjusted (0V), ‘set up adjusted APPLICATION EXAMPLE Vee ‘SC (90) IN Lh ¥ ? Joos} BPR] OP INBLK INGS\\nc INI 78 R-YIN 12K 012] ou5 8P 47K. Joe 60K 820 ry 10% Ld 72k Ps) 3) 22) 21) fo) fil fis) fir) fie) fi fi fig TREO eee eieT Oats EL Gt, B22H] 5h MX AMP MONTOR sok 0.01 of if pat Joon “ p= B-YIN oK| qed 0.01 1 | pox I YN SET UP LEVEL (ror ‘SC (180) IN Unit Resistance: 9 Capacitance = F MB 624982b 0021140 T83 MITSUBISHI oe teee 2-73

MITSUBISHI ICs (AV COMMON) NTSC PAL ENCODER ———. PRECAUTIONS FOR APPLICATION INPUT PULSE Terminal ®Vottege SV INPUT PULSE Luminance signal output 1. Blanking pulse (BLKP) BLKP input is at pin ® with threshold for color signal and Color signal output. luminance signal. a. For color signal, threshold is 3.5V. When LO is at "3.5 V - GND," sub-carrier supply for R-Y, B-Y demodulator is stopped. When burst flag pulse is inputted at B-Y, Luminance signal blanking subcarrier Is supplied during the period. Color signal blanking TE ae 2. Clamping pulse (CP) Min, approx. 0.7 Ver BFP (B- Sinem ey CP input is at pin ® with threshold of 2.0V. When LO is at "2.0 - GND," clamping function works. B-Y and R- Shere Be) Y can be set at any part of horizontal retrace line part as long as blanking is conducted to this part. In this case, when luminance signal has sync, set CP at back . Threshold is about 1.5 for luminance signal. When LO porch. is at “1.5V - GND," blanking is done to luminance signal. cP TexminaK@tuminance signal H mo Y input wevetorm _. St BLKP: ——" ‘Lov tA r-— | J 2" terence After BLK, ~~ About2.3v sof 3. Syne pulse (C. Sync) C. Sync input is at pin ® with threshold of 2.5V. When LO is "2.5V - GND," sync is added to C.VIDEO signal. weer cajostment In case of luminance signal with sync inputted is outputted, @) set pin 4N at "2.5V - VCC." In such case, input luminance _. signal without blanking, and set Set Up level pin (pin ®) ‘Roour2.3¥ to GND. . Set up Ye 4. Burst flag pulse (BFP) . lag pulse oerladistn at BFP input is at pin@(B-Y) and pin @(R-Y). 1/9 of input TerminaOSet Up level BFP is superimposed on color difference signal in the IC (input impedance 2k). When BFP is encoded a) to NTSC and into PAL, input only to B-Y (pin@) and to @) RLY (pin @ ) respectively. ese MH 6249826 0021141 917 a Poses 2-74 ELECTRIC

MITSUBISHI ICs (AV COMMON) M51272P/FP NTSC/PAL ENCODER CARRIER BALANCE OPTIMUM ADJUSTMENT CIRCUIT _ In the circuit above, sync dispersion is only that of extemal resistance dispersion. Vee 10K Quantity of sync addition of the IC is uneven because it is sik _ determined by the external resistance (3.6k 22) and the IC internal current. [21] Corrier balance COUNTERMEASURE FOR OSCILLATION AT OUTPUT STAGE WoEQ OUT Corrier balance Veer 8p 47K= tgp i ams 2K ut T00le VIDEO + Output 51k \\ aor ai Vee 10K Chroma monitor Points 1. To apply adjusting voltage based on © pin Vrer [2] voltage. ee 10pF 2. To allow fine adjustment. I \\ — Mount decoupling capacitors As an effective means, st Improvement by the circuit above ; near Io pins a capacitor approximately 10pF 1. Carrier balance shift against temperature change is to @ pin to decline frequency eliminated. characteristics. 2. Adjustment range is widened allowing easy adjustment. Depending on conditions of printed board, undesirable oscillation may be generated. In that case, efor to the information above Carrier balance for countermeasures. Ground pin @, set clamp, set pin ® to Vcc, and then remove blanking. Input proper burst flag pulse (NTSC-+B-Y, PAL—B-Y, R- Y) and sub-carrier. Then, observing pin ® chroma output, adjust pin@ and @ voltage so that carrier leakage becomes minimum. (Burst is outputted.) To input sub-carrier (pin ©, @), input rectangular wave of 0.2 - 2 Vee at duty 50%. SYNC EXTERNAL ADDITION METHOD ‘ded circuit Lr | 1 Veo=5.0V rac! U prox H \\ 20K OO barns 4 Cs SNe pute an oe aor" ig rE 09 SYNC addition level is variable in accordance with resistance value Mi 624982b OOellue 5b MITSUBISHI ae MTSBS 2-75 SOOO O)OQO)O)O)O)OG,O)OOOO EE oO

MITSUBISHI ICs (AV COMMON) NTSC/PAL ENCODER BLOCK DIAGRAM OF M51271 and M51272 (ENCODER) Adjustment is possible by fixing either of the gains at ‘about ~ 3:dB and controling the other gain, SAIN Carrier balance (At PAL only) Vee aN er 2K. @) iH eFP sik; It is used for adjustment of | 4 10 gein deviation of modulation |“ It is used for adjustment of burst gain Veo po tation nt dispersion (+348). Be careful because Carrier balence (max. + 4B). ‘Cont, carrier balance shifts due to this * adjustment (it is necessary to reset Adjust carrier balance based on Vaer as shown in the carrier balance). diagram. Thus, temperature characteristic improves, ‘and criticalness of adjustment diminishes. It is required at NTSC and PAL (no DL). =] SSsSSSssSs WM 6249826 0021143 79° MITSUBISHI 2-76 re RS TCs