Freescale Semiconductor MC44C401L Rev. 0.5, 07/2004 Data Sheet MC44C401L MTS Stereo Encoder The MC44C401L Multi-Channel Television Sound (MTS) Stereo Encoder is the industry’s first, single-chip, CMOS implementation of a Broadcast Television Systems Committee (BTSC)-compatible stereo encoder. The MC44C401L MTS Stereo Encoder is designed for use in set-top boxes, VCRs, DVD players/recorders, game stations, and other applications that are required to output high-quality stereo sound through a single RF coaxial cable. The digital audio processing used in the MC44C401L preserves the full fidelity of surround sound and other audio coding schemes while ensuring overall system performance is not impacted by copy protection technologies. The MC44C401L is engineered to process right and left analog audio signals and baseband composite video to generate a stereophonic composite signal in accordance with BTSC system standards. The MC44C401L is designed to output this signal to a Motorola RF modulator, which in turn produces a stereo encoded RF channel for use with any BTSC stereo television receiver. 1 Features • • • Integrated A/D input and D/A output circuitry CEX™ digital audio processing encodes and transports stereo signals Surround sound and Macrovision™ compatible © Freescale Semiconductor, Inc., 2004. All rights reserved. PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE 1. 2. 3. 4. 5. 6. 7. Contents Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reference Documentation . . . . . . . . . . . . . . . . . . . . . . Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I/O Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . Package Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Functional Description . . . . . . . . . . . . . . . . . . . . . . . . 1 2 2 4 5 7 9 Reference Documentation • • • • • • 2 Extended low frequency response (The MC44C401L frequency response extends below 25 Hz) Simple passive interface to Motorola’s MC44BC374 (UHF/VHF) and MC44BC375 (VHF) modulators Preservation of original surround sound fidelity System performance not impacted by copy protection technologies Enables lower system component count, smaller board size, and significantly lower overall system cost Eliminates manual alignment of filters, phase controls, and composite signal amplitude Reference Documentation “Multichannel Television Sound Transmission and Audio Processing Requirements for the BTSC System”, FCC OET Bulletin No. 60, February 1986. 3 Block Diagrams MC44C401L APLLVDD XTALIN XTALOUT APLLVSS ADCVDD VINLP VAGO VREFP VAGO VREFM VINRP VAGO ADCVSS CVBS 30 28 27 29 7 9 10 4 6 5 2 3 8 1 Oscillator APLL Clock Generator 4MHz Σ∆ ADC Σ∆ DAC 31 32 11 15 16 26 25 24 21 20 19 18 V-REF Σ∆ ADC Sync Separator Audio Processor SSVDD SSVSS 22 17 CLK4MHZ DACVDD CA DACVSS DVSS OVDD DVSS DVDD DVSS DVSS DVSS VID_PRES Sync Separator Reference Figure 1. MC44C401L Block Diagram MTS Stereo Encoder, Rev. 0.5 2 PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE Freescale Semiconductor Block Diagrams 0.1µF 0.1µF VIN 3.3V REG 0.1µF 0.1µF 22µH 1µF 1µF 3.3V 1K 47Ω 47Ω 1µF 510Ω 0.1µF 1K 1 CVBS IN 0.1µF 470pF 1M DACVDD 11 25 OVDD ADCVDD 7 31 SSVDD 21 DVDD APLLVSS 29 CVBS VID_PRES 17 560µH CVBS 15 500 1000pF MC44C401L CLK4MHZ 22 1µF 2200pF LPF or BPF XTALOUT 1µF VINLP VINRP VAGO VAGO VAGO VREFP VREFM VID_PRES to Modulator Composite Audio to Modulator 4MHz to Modulator 27 1µF 9 2 3 10 6 4 5 0.1µF SSVSS ADCVSS DACVSS DVSS DVSS DVSS DVSS DVSS XTALIN LEFT IN RIGHT IN 32 8 16 26 24 20 19 18 28 1µF APLLVDD 30 1µF Analog Ground Digital Ground 12MHz 22pF 2M 22pF Figure 2. MC44C401L Recommended Usage MTS Stereo Encoder, Rev. 0.5 Freescale Semiconductor PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE 3 I/O Description 4 I/O Description 4.1 Signal List The Stereo Modulator I/O signals are described in Table 1. Table 1. MC44C401L Signal Descriptions Signal Pin # Description Analog VINL 9 Left channel input voltage VREFP 4 ADC ref. input voltage VAGO 3,6,10 Analog virtual ground VREFM 5 ADC ref. input voltage VINR 2 Right channel input voltage CVBS 1 Composite video input CA 15 Composite Audio Output VID_PRES 17 Video present flag, 0 = no video, hi-z = video present valid after 100 lines of valid video Digital NC 23,14, 13,12 No Connect XTALIN 28 Crystal input XTALOUT 27 Crystal output CLK4MHZ1 22 4 MHz clock for Audio/Video modulator IC APLLVDD 30 APLL analog supply voltage, 1.8 V APLLVSS 29 APLL analog ground SSVDD 31 Sync Separator analog supply voltage, 3.3 V SSVSS 32 Sync Separator analog ground ADCVDD 7 ADC analog supply voltage, 3.3 V ADCVSS 8 ADC analog ground Clocks Power Supply MTS Stereo Encoder, Rev. 0.5 4 PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE Freescale Semiconductor Electrical Specifications Table 1. MC44C401L Signal Descriptions (continued) Signal 1 5 Pin # Description DACVDD 11 DAC I/O supply voltage, 3.3 V DACVSS 16 DAC I/O ground DVDD 21 Digital Logic supply voltage, 1.8 V DVSS 18, 19, 20, 24, 26 Digital Logic/I/O ground OVDD 25 I/O supply voltage, 3.3 V Use a 4MHz LPF or BPF on this clock signal to the modulator Electrical Specifications 5.1 DC Characteristics Table 2. MC44C401L DC Characteristics (Preliminary) PIN Symbol Parameter Min Typ Max Unit 1.62 1.80 1.98 V 18.0 22.0 mA 3.30 3.63 V 2.0 8.0 mA 3.30 3.63 V 7.0 9.0 mA 3.30 3.63 V 7.0 9.0 mA 3.3 3.63 V DVDD - 1.8 V Digital Logic DVDD - 1.8 V Digital Logic OVDD - 3.3 V Digital Output OVDD - 3.3 V Digital Output DACVDD - 3.3 V DAC Supply DACVDD - 3.3 V DAC Supply ADCVDD - 3.3 V ADC Supply ADCVDD - 3.3 V ADC Supply SSVDD - 3.3 V Sync. Sep Supply SSVDD - 3.3 V Sync. Sep Supply APLLVDD - 1.8 V APLL Supply APLLVDD - 1.8 V APLL Supply 3.0 mA VREFP - Voltage Ref. Bypass plus 2.0 V VREFM - Voltage Ref. Bypass minus 1.0 V VAGO - Voltage Ref. Ground 1.5 V VINX Vil Signal Input VREFM VREFP V VINX Vih Signal Input VREFM VREFP V CVBS 2.97 2.97 2.97 2.97 2.0 1.62 Video input (See Figure 2) 1.8 1 mA 1.98 V Vpp MTS Stereo Encoder, Rev. 0.5 Freescale Semiconductor PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE 5 Electrical Specifications Table 2. MC44C401L DC Characteristics (continued)(Preliminary) PIN Symbol Parameter CLK4MHZ Vol 4 MHz Clock Output @ I =.6 mA CLK4MHZ Voh 4 MHz Clock Output @ I =.6 mA CA Vol1 Composite Audio Output 1 Min Typ Max 2.97 Unit V 3.63 2.2 V Vpp Vol is measured at Iload= 6 mA (see test circuit Figure 2) 5.2 AC Characteristics Table 3. MC44C401L AC Characteristics (Preliminary) (See Figure 2) SIGNALS Parameter1 Symbol Min Typ Max Unit 1.0 Vpp LEFT/RIGHT IN Input Level LEFT/RIGHT IN Input Impedance 250 kΩ COMPOSITE Composite Output Level2 2.2 Vpp COMPOSITE SNR3 75 dB COMPOSITE THD<superscript>2 COMPOSITE -1 db Bandwidth CVBS IN Video Level CVBS Zin 65 0.1 0.3 % 20 14000 Hz 0.5 2.0 Vpp Video Input Impedance Stereo Separation 500Hz - 5KHz4 Stereo Separation 100Hz 10KHz<superscript>4 30 1000 W 35 dB 35 dB 1 See Figure 2 for test setup Test conditions 1 kHz 0 dB 3 Measured in 20 Hz to 13.5 kHz bandwidth 4 Measured -10 dB input level 2 MTS Stereo Encoder, Rev. 0.5 6 PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE Freescale Semiconductor Package Data 6 Package Data 6.1 MC44C401L Package 32 CVBS OVDD DVSS XTALOUT XTALIN APLLVSS APLLVDD SSVDD SSVSS The MC44C401L pin-outs (32TQFP package) are shown in Figure 3. 25 24 1 VINR DVSS NC Orientation Mark VAGO CLK4MHZ VREFP DVDD Freescale MC44C401L VREFM DVSS VAGO DVSS ADCVDD DVSS 8 17 16 CA NC NC NC DACVDD VAGO VINL 9 VID_PRES DACVSS ADCVSS Figure 3. MC44C401L 32LQFP Package MTS Stereo Encoder, Rev. 0.5 Freescale Semiconductor PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE 7 Package Data 6.2 Mechanical Data 0.20 4X H A–B D 6 32 26 1 F 25 A B G E1 G E G 8 E/2 17 9 7 NOTES: 1. 16 3. D 4 C A–B D DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994. CONTROLLING DIMENSION: MILLIMETER. DATUM PLANE A, B AND D TO BE DETERMINED AT DATUM PLANE H. DIMENSIONS D AND E TO BE DETERMINED AT SEATING PLANE C. DIMENSIONS b DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL NOT CAUSE THE LEAD WIDTH TO EXCEED THE MAXIMUM b DIMENSION BY MORE THAN 0.08 MM. DAMBAR CANNOT BE LOCATED ON THE LOWER RADIUS OR THE FOOT. MINIMUM SPACE BETWEEN PROTRUSION AND ADJACENT LEAD OR PROTRUSION: 0.07 MM. DIMENSIONS D1 AND E1 DO NOT INCLUDE MOLD PROTRUSION. ALLOWABLE PROTRUSION IS 0.25 MM PER SIDE. D1 AND E1 ARE MAXIMUM PLASTIC BODY SIZE DIMENSIONS INCLUDING MOLD MISMATCH. EXACT SHAPE OF EACH CORNER IS OPTIONAL. THESE DIMENSIONS APPLY TO THE FLAT SECTION OF THE LEAD BETWEEN 0.1 MM AND 0.25 MM FROM THE LEAD TIP. 2. D D/2 0.20 F 4 DETAIL G E1/2 4X A, B, D D1/2 PIN 1 INDEX 5 3 e/2 D1 4. 5. 28X e 32X 0.10 C H SEATING PLANE 6. C 7. 8X .(O1º) 8. R R2 A2 R R1 A 0.25 GAGE PLANE A1 BASE METAL (S) L (Oº) PLATING 5 (L1) C 8 (C1) b1 b 0.20 M C A–B D DIM A A1 A2 b b1 c c1 D D1 e E E1 L L1 O O1 R1 R2 S MILLIMETERS MIN MAX 1.40 1.60 0.05 0.15 1.35 1.45 0.30 0.45 0.30 0.40 0.09 0.20 0.09 0.16 9.00 BSC 7.00 BSC 0.80 BSC 9.00 BSC 7.00 BSC 0.70 0.50 1.00 REF 0∞ 7∞ 12∞ REF 0.08 0.20 -0.08 0.20 REF SECTION F–F ROTATED 90ºCW 32 PLACES Figure 4. MTS Stereo Encoder, Rev. 0.5 8 PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE Freescale Semiconductor Functional Description 7 Functional Description The following sections provide brief descriptions of the MC44C401L modules. 7.1 Phase Locked Loop (APLL) The APLL, shown in Figure 5, locks to the reference frequency of 12 MHz and generates the master clock. MC44C401L 384 MHz APLL VCO Clock Generator ÷ Ref Clk Oscillator XTALIN 22pF 12MHz 2M XTALOUT 22pF Figure 5. APLL and Clock Generator 7.2 Sync Separator The Sync Separator, shown in Figure 6, extracts the composite sync from the incoming composite video signal. The composite sync is used by the Audio Processor to generate the 15.734 kHz pilot tone and the 31.468 kHz carrier to modulate the Left-Right channel. The nominal output level of composite video signal sources is 1 Vpp on 75 Ω and the sync amplitude is 0.3 V. MC44C401L 1K 0.1µF CVBS CVBS IN 470pF Sync Separator Audio Processor 1M Figure 6. Sync Separator MTS Stereo Encoder, Rev. 0.5 Freescale Semiconductor PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE 9 Functional Description Input Left Channel only 1800Hz 400mVp-p Audio Precision SYS2 Left In Audio Generator Right In Audio Spectrum Analyzer Composite Video Stereo Encoder CVBS In Attenuator Audio Analyzer Adjust for optimal separation with only Left Channel driven 1800Hz 4.5MHz Notch Filter Modulator No Audio Pre-emphasis Composite Video Spectrum Analyzer Precision Receiver (TEK TV1350) Precision MTS Decoder (Modulation Sciences SRD1) 0db / 25kHz deviation = 1.4Vp-p @ 1kHz Mono (both channels driven) Wide Band Output NOTES: 1. Input 1kHz both channels @ 1.45Vp-p. 2. Set attenuator for 25kHz deviation out of modulator. 3. Input 1.8kHz 0.4Vp-p on left channel only and optimize stereo separation with attenuator. 25kHz deviation Check = 10396Hz @ 25kHz deviation gives bessel null and Ref Level on SRD-1 Figure 7. MC44C401L Level Setup MTS Stereo Encoder, Rev. 0.5 10 PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE Freescale Semiconductor Functional Description THIS PAGE INTENTIONALLY LEFT BLANK MTS Stereo Encoder, Rev. 0.5 Freescale Semiconductor PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE 11 How to Reach Us: Information in this document is provided solely to enable system and software implementers to use USA/Europe/Locations Not Listed: Freescale Literature Distribution P.O. Box 5405, Denver, Colorado 80217 1-480-768-2130 (800)-521-6274 Freescale Semiconductor products. There are no express or implied copyright licenses granted hereunder Japan: Freescale Semiconductor Japan Ltd. SPS, Technical Information Center 3-20-1, Minami-Azabu, Minato-ku Tokyo 106-8573, Japan 81-3-3440-3569 to design or fabricate any integrated circuits or integrated circuits based on the information in this document. Freescale Semiconductor reserves the right to make changes without further notice to any products herein. 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MC44C401L Rev. 0.5 07/2004 For information on Freescale.s Environmental Products program, go to http://www.freescale.com/epp. PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE