Details, datasheet, quote on part number: MC44353
PartMC44353
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Features, Applications

PLL Tuned UHF Audio/Video Modulator ICs for PAL, SECAM and NTSC TV Systems

MC44353 ­ Multi­Standard Modulator MC44354 ­ PAL/NTSC Modulator MC44355 ­ PAL/NTSC Modulator IC with MC44355 ­ Fixed Video Modulation Index

These modulator circuits are intended for use in VCRs, satellite receivers, set­top boxes, video games, etc. An on­chip 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 5.5, 6.0 and 6.5 MHz carrier frequencies, selectable by the bus. For the sound, either frequency modulation with pre­emphasis 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 on­chip 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)

On­Chip Low Power Operational Amplifier for Direct Tuning Varactor Voltage Single­Ended Output for Low Cost and Ease of Interface Low External Component Count High Speed I2C Bus Compatible Programmable Video Modulation Depth (8 Steps of 2.5%) Programmable Picture/Sound Carriers Ratio and Audio Sensitivity (8 Steps of 1.0 dB) On­Chip Programmable Sound Subcarrier Oscillator (4.5 MHz to 6.5 MHz) On­Chip Video Test Pattern Generator with Sound Test Signal (1.0 kHz) VCC Standby Mode (Typ 500 µA) Transient Output Inhibit During PLL Lock­Up at Power­On

Amp In Op Out VCCD Osc Gnd Xtal 19 SDA 18 SCL 17 Mod Gnd 16 VCC Mod 15 RF Out 14 Mod Gnd 13 Video In 12 VCCA 11 Audio In (Top View)

This document contains information on a new product. Specifications and information herein are subject to change without notice.

VCCA 12 16 Peak White Clip 15 Video Modulator + Sound Mix Clamp MC44353 8 Mod Gnd SCL SDA High Speed Bus Modulator Section PLL Section Xtal 20 Ref Osc Ref Divider ÷8 Prescaler 3 Phase Comp Bias 2 Op Out 1 Amp In Value 36 TA Tstg to 150 Unit °C TE1 Test Pattern Generator TE2 7.8 kHz 976 Hz UHF Osc and Drives 7 6 Osc 5 Osc 4 Osc Gnd 2 3 Phase/ Freq Comp Sound Osc + FM Mod 3 AM Mod 11 Audio Osc Gnd 10 Pre­Em Mod Gnd 14 Video In 13 Snd Fil 8 Snd Tun 9

Rating Supply Voltage Operational Amplifier Output Voltage Operating Ambient Temperature Storage Temperature Symbol VCC

NOTES: 1. Maximum ratings are those values beyond which damage to the device may occur. For functional operation, voltages should be restricted to the Recommended Operating Conditions. 2. ESD data available upon request.

ELECTRICAL CHARACTERISTICS (Parameter Type: A­100% Tested, B­100% Correlation Tested, C­Characterized on

Samples. D­Design Parameter, VCC = 25C, Video input 1.0 Vpp, 10 step greyscale. Step 3 [typ. 80%] modulation depth for PAL; Step 5 [typ 90%] modulation for SECAM L; P/S ration Step 3 [typ 14.5 dB]. RF output into 75 load. Unless otherwise noted.) (Specifications only valid for envelope demodulation.) Characteristic Operating Supply Voltage Range Analog Section Supply Current (VCC 5.0 V) Digital Section Supply Current (VCC 5.0 V) Modulator O/P Section Supply Current (VCC 5.0 V) Total Supply Current (VCC 5.0 V) During Standby During Standby (with Data Retension: VCC Mod = 5.0V) Operational Amplifier Output Voltage (through Rpullup) Operational Amplifier Output Current (with Rpullup 560 k Test Pattern Sync Pulse Width TE1 Symbol VCCA,VCCD, VCC Mod ICCA ICCD ICC Mod ICC VCC Mod ICC Mod Min Typ Max Unit µA µs Type

ELECTRICAL CHARACTERISTICS (continued) (Parameter Type: A­100% Tested, B­100% Correlation Tested, C­Characterized on Samples. D­Design Parameter, VCC = 25C, Video input 1.0 Vpp, 10 step greyscale. Step 3 [typ. 80%] modulation depth for PAL; Step 5 [typ 90%] modulation for SECAM L; P/S ration Step 3 [typ 14.5 dB]. RF output into 75 load. Unless otherwise noted.) (Specifications only valid for envelope demodulation.)

Characteristic UHF Comparator Pump Current (Note 1) Sound Comparator Pump Current (Note 2) Op­Amp Input Current Oscillator Stability ­ negative resistance Delay VCCA/D to VCC Mod Application (See Figure 2) VCCA/D & VCC Mod Duration for Standby Mode Function (See Figure 2) t_sup_del t_sup_min Symbol Min Typ Max Unit ns ms Type

NOTES: 1. Current sources driven by the UHF phase comparactor, that are connected to Pin 1. 2. Current sources driven by the phase sound comparator, that are connected to Pin 8.

Figure 2. Initial Power­On and Standby Mode VCC Timing Diagram

For proper operation of internal reset functions, VCCA and VCCD (which must be applied simultaneously) may not be applied after VCCmod. Normally, all VCC lines will come up at the same time. However, due to the possibility of a Standby VCC to be applied to the VCCmod pin, care should be ensured that

VCCmod is not applied before VCCA and VCCD (which must be tied together). See the timing diagram and DATA RETENTION function description. Note that VCCA/D and VCCmod must be activated above 4.5 V for a least 30 msecs before the device can operate correctly in Standby Mode.

HIGH SPEED I2C COMPATIBLE BUS CHARACTERISTICS (Over Functional Temperature Range ­ VCC 5.0 V)

Characteristic SDA/SCL Output Current 0 V SDA/SCL Low Input Level SDA/SCL High Input Level SDA/SCL Input Current for Input Level from to 0.3 VCC SDA/SCL Input Level SDA/SCL Capacitance ACK Low Output Level (sinking 3.0 mA) ACK Low Output Level (sinking 15 mA) Ci Vil Vih Symbol Min Typ Max VCC Unit pF V Type


 

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