MC44353

Order this document by MC44353/D Advance Information PLL Tuned UHF Audio/Video Modulator ICs for PAL, SECAM and NTSC TV Systems MC44353 – Multi–Standard Modulator IC MC44354 – PAL/NTSC Modulator IC MC44355 – PAL/NTSC Modulator IC with MC44355 – Fixed Video Modulation Index These modulator circuits are intended for use in VCRs, satellite receivers, set–top boxes, video games, etc. An on–chip high speed I2C compatible bus receiver is included and is used to set the channel, tuned by a PLL over the full range in the UHF bands. The modulator incorporates a sound subcarrier oscillator, using a second PLL to derive 4.5, 5.5, 6.0 and 6.5 MHz carrier frequencies, selectable by the bus. For the sound, either frequency modulation with pre–emphasis or amplitude modulation (MC44353 only) is possible. A control bit (MC44353 only) is used to select AM sound with positive RF modulation (system L). The level of the sound carrier with respect to the vision carrier and the modulation depth of both sound and vision may be adjusted by means of the bus. In addition, an on–chip video test pattern generator may be switched in with a 1.0 kHz audio test signal. Channel 21 through 69 UHF Operation (471 MHz to 855 MHz) MC44353 MC44354 MC44355 MULTI–STANDARD AND PAL/NTSC MODULATOR ICs SEMICONDUCTOR TECHNICAL DATA 20 1 DTB SUFFIX PLASTIC PACKAGE CASE 948E (TSSOP–20) On–Chip Low Power Operational Amplifier for Direct Tuning Varactor Voltage Single–Ended Output for Low Cost and...