Moteur de recherche de fiches techniques de composants électroniques |
|
MC1378FN Fiches technique(PDF) 2 Page - Motorola, Inc |
|
MC1378FN Fiches technique(HTML) 2 Page - Motorola, Inc |
2 / 6 page MC1378 2 MOTOROLA ANALOG IC DEVICE DATA MAXIMUM RATINGS Rating Symbol Value Unit Supply Voltage VCC 6.0 Vdc Operating Temperature TA 0 to +70 °C Storage Temperature Tstg –65 to +150 °C Junction Temperature TJ(max) 150 °C Power Dissipation, Package Derate above 25 °C PD 1.25 10 W mW/ °C RECOMMENDED OPERATING CONDITIONS Condition Pin Value Unit Supply Voltage 28, 36 5.4 ± 0.25 Vdc RGB Input for 100% Saturation 14, 15, 16 1.0 Vpp Color Oscillator Input Level 8 0.5 Vpp Video Input, Positive 24 1.0 Vpp ELECTRICAL CHARACTERISTICS (VCC = 5.0 V, TA = 25°C, circuit of Figure 4 or 5) Characteristics Pin Min Typ Max Unit Supply Current 28, 36 – 100 – mAdc Video Output, Open Circuit, Positive 27 – 2.0 9.4 Vpp Modulation Angle (R – Y) to (B – Y) – 87 90 93 Degrees RGB Input Impedance 14, 15, 16 – 10 – k Ω Local/Remote Switch (TTL) High Low 1 – Remote Local – – Horizontal Sync Input, Negative Going (TTL) 40 – 4.3 – Vpp Vertical Sync Output, Negative Going, Remote Mode (TTL) 38 – 4.3 – Vpp Composite Sync Output, Negative Going (TTL) 39 – 4.3 – Vpp Burst Gate Output, Positive Going (TTL) 5 – 4.3 – Vpp Description of Operation – Refer to Figures 3, 4 Remote Mode Local Mode The incoming remote video signal (Pin 24) supplies all synchronizing information. A discussion of the function of the phase detectors helps to clarify the lockup method: The MC1378 and a video system combine to provide a fully synchronized standard signal source. In this case, composite sync must be supplied by the video system or other time base system. In the MC1378 the phase detectors operate as follows: PD1 locks the internally counted–down 4 MHz horizontal VCO to the incoming horizontal sync. It is fast acting, to follow VCR source fluctuations. PD1 locks the internally counted–down 4 MHz horizontal VCO to a Horizontal Sync signal (at Pin 40) from the video system (counted down from 36 MHz) PD2 locks the 36 MHz clock VCO, which is divided down by the video system, to the divided down horizontal VCO. PD2 not used in LOCAL MODE. PD3 not used in LOCAL MODE. PD3 is a gated phase detector which locks the 14 MHz crystal oscillator, divided by 4, to the incoming color burst. PD4 active, but providing an arbitrary phase shift setting between the color oscillator and the output burst phase. PD4 controls an internal phase shifter to assure that the outgoing color burst is the same phase as incoming burst at PD3. PD5 not used in REMOTE MODE PD5 locks the 36 MHz clock VCO (which is divided down by the video system) to the 14 MHz (crystal) color oscillator. The 14 MHz is, therefore, the system standard in LOCAL MODE, and is not DC controlled. Vertical lock is obtained by continuously resetting the sync generator in the video system with separated vertical sync from the MC1378, Pin 38. This signal is TTL level vertical block sync, negative going. The horizontal sync from the video system to Pin 40 is also TTL level with sync negative going. The local/remote switch, Pin 1, is in local mode when grounded, remote mode when taken to 5.0 V. The overlay control, Pin 25, has an analog characteristic, centered about 1.0 V, which allows fading from local to remote. COMPOSITE VIDEO GENERATION The color encoding at the RGB signals is done exactly as in the MC1377. Composite chroma is looped out at Pins 18 and 20 to allow the designer to choose band shaping. Luminance is similarly brought out (Pins 17 and 22) to permit installation of the appropriate delay. Composite sync output, Pin 39, and burst gate output, Pin 5, are provided for convenience only. |
Numéro de pièce similaire - MC1378FN |
|
Description similaire - MC1378FN |
|
|
Lien URL |
Politique de confidentialité |
ALLDATASHEET.FR |
ALLDATASHEET vous a-t-il été utile ? [ DONATE ] |
À propos de Alldatasheet | Publicité | Contactez-nous | Politique de confidentialité | Echange de liens | Fabricants All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |