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Freescale Semiconductor
Document Number: MC44CC375AV Rev 1, 11/2008
PLL Tuned VHF (Channel 3 / 4) Audio / Video Modulator
MC44CC375AV
The MC44CC375 CMOS RF modulator is the latest generation of the legacy MC44BC375 products. The MC44CC375AV is an audio/video RF modulator for use in VCRs, set-top PLL TUNED VHF boxes, and similar devices. It is designed for applications requiring US broad(CHANNEL 3/4) cast, channel 3 or channel 4, RF outputs. AUDIO/VIDEO MODULATOR A programmable Phase-Locked Loop (PLL) tunes the modulator, and the desired channel 3 or 4 frequency is selected using the external package pin, Channel Selection (CHS). No external tank circuit components are required, reducing the sensitivity of the PCB design and the need for external adjustments. The PLL obtains its reference from a 4.0 MHz crystal oscillator. The sound oscillator can be turned ON and OFF by the external package pin Sound Oscillator Control (SOC). A fixed Picture to Sound ratio of 12 dB and 4.5 MHz sound subcarrier are used for MC44CC375AV. A low-power standby mode is selectable via the pin, Power Save (PSAVE), which turns off all internal VCOs and mixers. Also included in this new generation CMOS RF modulator is the Sound AuxilEF SUFFIX iary Input, pin AUX, which bypasses the sound FM modulator. This direct sound SOIC 16 PACKAGE RF modulator has found more and more applications in BTSC stereo systems. CASE 751B-05 * U.S. broadcast frequency for Channel 3 or 4 operation is selected by CHS pin * Sound Oscillator ON/OFF control selectable by pin SOC * Picture to Sound ratio set to 12 dB * Sound subcarrier frequency set to 4.5 MHz * Low-power standby mode selectable by pin PSAVE * Direct RF sound carrier input pin AUX (FM modulator bypassed for stereo sound applications) * ESD protection up to 2 kV * Peak White Clip enabled * Transient output inhibit during PLL Lock-up at power-ON * Available in Pb-free, RoHS compliant, narrow body SOIC 16 package. ORDERING INFORMATION
Device MC44CC375AVEF, R2 Note: For tape and reel, add the R2 suffix. Temp. Range 0C to +70C RoHS Yes
MC44CC375AV Video In
Clamp Clip VCO Mixer
Crystal
FM Audio Control
Mixer
TVOUT
Audio In
AUX
Channel 3/4
This document contains certain information on a new product. Specifications and information herein are subject to change without notice.
(c) Freescale Semiconductor, Inc., 2008. All rights reserved.
PIN DESCRIPTIONS
SO16 Pin Package
CHS GND SOC XTAL PREEM AUDIO SPLFLT VIDEO
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
PSAVE AUX PLLFLT No Connect VCC RFOUT GND VCC
Figure 1. Pin Connections Table 1. Package Pin Description
Pin Number 1 2 3* 4 5 6 7 8 9 10 11 12 13 14 15 16 Pin Name CHS GND SOC XTAL PREEM AUDIO SPLFLT VIDEO VCC GND RFOUT VCC No Connect PLLFLT AUX PSAVE Description Channel Select, Low - CH3; High - CH4 Ground Sound Oscillator ON/OFF Control, Low - ON, Open - OFF Crystal Input Pre Emphasis Audio Input Sound PLL Loop Filter Video Input VCC Audio Ground TV Output Plus VCC Do not connect PLL Loop Filter Auxiliary Input Power Save Mode Control, Low - Power Save; High - Normal
* Pin 3, SOC, should not be pulled up to high voltage. It has an internal pull-up of 1.8V.
MC44CC375AV 2 Digital Home Freescale Semiconductor
FUNCTIONAL OVERVIEW
Figure 2 shows a simplified block diagram of the MC44CC375AV device. There are two main sections: 1. A PLL section to synthesize the VHF output channel frequency for channel 3 or channel 4. A modulator section which accepts audio and video inputs and modulates the VHF carrier. The high frequency CMOS technology allows integration of the UHF tank circuit and certain filtering functions eliminating the need for a number of external components. 2.
VIDEO
8 Peak White Video Modulator
Internal Control Bus
SPLFLT
7
Clamp 31.25 kHz Sound PFD Program Divider
VCC
12
MODULATOR SECTION
Sound Oscillator and FM Modulator LPF ALC 10 GND 6 Audio Amplifier 5
AUDIO PREEM VCC
RFOUT 11
9
FM RF Sound Modulator
15 AUX VHF Dividers
SOC
3 Control Section Prescaler /8
VCO and PLL SECTION
UHF OSC (2 x Fo)
Ref Divider Phase /128 Comp. 31.25 kHz
PSAVE 16 CHS
1
/2
Program Divider
XO Prescaler
13
NO CONNECT
/N11:N0
2
XCO
14
4
GND
PLLFLT
XTAL (4 MHz)
Figure 2. MC44CC375AV Simplified Block Diagram POWER SUPPLY Do NOT bias any other pin before VCC is applied to the device. STANDBY MODES During standby mode, the modulator is switched to low power consumption. The sound oscillator, UHF oscillator and VHF dividers, video and sound modulator sections bias are internally turned OFF. The modulator is programmed in standby mode when pin 16, PSAVE, is set to a "LO" level TRANSIENT OUTPUT INHIBIT To minimize the risk of interference to other channels while the UHF PLL is acquiring a lock on the desired frequency, the Sound and Video modulators are turned OFF at power-ON (i.e., VCC is switched from 0 V to 3.3 V). There is a time-out of 263 ms until the output is enabled. This allows the UHF PLL to settle to its programmed frequency. During the 263 ms time-out, the sound PLL current source is set to 10 A typical to speed up the locking time. After the 263 ms time-out, the current source is switched to 1.0 A. Use care when selecting loop filter components to ensure the loop transient does not exceed this delay.
MC44CC375AV Digital Home Freescale Semiconductor 3
VIDEO SECTION The modulator requires a composite video input with negative going sync pulses and a nominal level of 1.0 V(pp). This signal is AC coupled to the video input where the sync tip level is clamped. The video modulation depth typical value is given for 1.0 VCBVS input level. It can be reduced by simply adding a resistive divider at video input, resulting in a lower signal seen by the video input stage. The video signal is then passed to a peak white clip circuit whose function is to soft clip the top of the video waveform if the amplitude from the sync tip to peak white goes too high. In this way, over-modulation of the carrier by the video is avoided. The clipping function is always engaged. The clipping happens at 106IRE with 1.0 Vpp video signal (100IRE = 0.7 Vpp video blank to white). SOUND SECTION The PLL multivibrator oscillator is fully integrated. The sound modulator system consists of an FM modulator incorporating the sound subcarrier oscillator. The audio input signal is AC coupled into the amplifier which then drives the modulator. The audio pre-emphasis circuit is a high-pass filter with an external capacitor C1 and an internal resistor (100 k typical). The recommended capacitor value (750 pF) is for NTSC standards, time constant is 75 s. The audio bandwidth specification is for 50 Hz to 15 KHz range, with pre-emphasis circuit engaged. Without this pre-
emphasis circuit, it is possible to extend the audio bandwidth to high frequencies, as there is no internal frequency limitation (stereo application, SAP, etc.). PLL SECTION -- DIVIDERS The reference divider is a fixed /128 resulting in a reference frequency of 31.25 KHz with a 4.0 MHz crystal. The 31.25 KHz reference frequency is used for both the UHF and Sound PLLs. The prescaler is a fixed /8 and is permanently engaged. The VHF divider is also a fixed /8. The programmable divider's division ratio is controlled by the CHS pin voltage in order to select channel 3 or channel 4. PIN SELECTION Pins CHS and PSAVE are internally pulled up to 3.3 V, SOC is internally pulled up by 1.8 V. By default (open condition), all pins are "HI". Table 2. Configuration Pin Settings
Pin No 1 3 16 Pin Name CHS SOC PSAVE LO (grounded) CH3 - 61.25 MHz Sound ON Power Save Mode HI* CH4 - 67.25 MHz Sound OFF Normal Mode
*Please do not pull pin 3 to high voltage. For HI condition, leave pin 3 open.
MC44CC375AV 4 Digital Home Freescale Semiconductor
ELECTRICAL SPECIFICATIONS
Table 3. Absolute Maximum Ratings Absolute maximum continuous ratings are those maximum values beyond which damage to the device may occur. Exposure to these conditions or conditions beyond those indicated may adversely affect device reliability. Functional operation at absolutemaximum-rated conditions is not implied.
Characteristic Supply Voltage Any Input Voltage* Storage Temperature Range Junction Temperature *Except for Pin 3, SOC. Symbol VCC Vin Tstg TJ Min -0.3 -0.3 -65 -- Max +3.6 VCC + 0.3 +150 +105 Units V V C C
Table 4. General Specifications
Characteristic ESD Protection (Charge Device Model) ESD Protection (Human Body Model)(1) Latch-up Immunity Thermal resistance from Junction to Ambient 1. JEDEC JESD22-A114D. Symbol CDM HBM LU RJA Min -500 -2000 200 -- Typ -- -- -- 102 Max +500 +2000 -- -- Units V V mA C/W
Table 5. Recommended Operating Conditions and DC Characteristics
Characteristic Supply Voltage Total supply current (all sections active) Sound comparator charge pump current: RF comparator charge pump current Threshold level on pins: CHS, PSAVE, Ambient Temperature Vth TA While locking When locked Symbol VCC ICC Min +3 65 1.0 -- 1.2 -- 0 Typ +3.3 85 3.9 1.0 1.6 2.1 -- Max +3.6 98 7.0 1.5 2 --+70 Units V mA A A mA V C
NOTE: Crystal specification reference information Frequency = 4 MHz Mode = Parallel Resonance Load Capacitance = 27 pF Motional Resistance = 10 Ohms Typical (100 Ohms Maximum Starting)
MC44CC375AV Digital Home Freescale Semiconductor 5
PERFORMANCE CHARACTERISTICS
Unless otherwise stated, all performance characteristics are for: * Power Supply, VCC = 3.3 V * Ambient Temperature, TA = 25o C * Video Input 1.0 Vp-p, 10-step grayscale. * RF inputs/outputs into 75 load. NOTE: Specifications only valid for envelope demodulation. The parameters listed are based on the type of test conditions found in the column Type. * A = 100% tested * B = 100% Correlation tested * C = Characterized on samples * D = Design parameter See the "Characterization Measurement Conditions" on page 8 for each C type parameter.
Table 6. High Frequency Characteristics
Parameter RFOUT output level Sound subcarrier harmonics (Fp+nFs) Second harmonic of chroma subcarrier Chroma/Sound intermodulation: Fp+ (Fsnd - Fchr) Fo (picture carrier) harmonics(2) Test Conditions(1) Output video carrier level from modulator section Reference picture carrier Using red EBU bar Using red EBU bar 2nd harmonic 3rd harmonic: Out band (picture carrier) spurious In band spurious (Fo @ 5.0 MHz) 1/4Fo, 1/2Fo, 3/4Fo, 3/2Fo No video sound modulation Min 84 -- -- -- -- -- -- -65 Typ 90 -63 -54 -65 50 77 12 -- Max 94 -- -- -- -- -- 30 -- Unit dBV dBc dBc dBc dBV dBV dBV dBc Type B C C C C C C C
1. See Performance Measurement Test Set-ups, Table 9. 2. Picture carrier harmonics are highly dependant on PCB layout and decoupling capacitors.
Table 7. Video Performance Characteristics
Parameter Video bandwidth Video input level Video input current Video input impedance Video S/N Differential Phase Differential Gain Luma/Sync ratio Video modulation depth Peak White Clip No sound. CCIR Rec.567 weighting filter On line 17 in M standard (FCC). PWC set to 0 On line 17 in M standard (FCC). PWC set to 0 Input ratio 7.0:3.0 Video input level = 1.0 VCVBS Video Modulation depth for video = 1.4 VCVBS Test Conditions(1) Reference 0 dB at 100 KHz, measured at 5.0 MHz 75 load Min -0.5 -- 8 75 53 -5 -5 6.8/3.2 75 90.5 Typ 0.1 1 10 93 55 -- -- -- 83 94 Max 0.5 1.5 12 110 -- +5 +5 7.2/2.8 88 97.5 Unit dB Vcvbs A K dB deg % -- % % Type C D A A C C C B B B
1. See Performance Measurement Test Set-ups, Table 9.
MC44CC375AV 6 Digital Home Freescale Semiconductor
Table 8. Audio Performance Characteristics
Parameter Picture-to-Sound Ratio Audio Modulation Index Test Conditions(1) Min 13 Typ 15 Max 18 Unit dB Type B
Using specific pre-emphasis circuit, Audio input = 1.0 KHz @ 200 mVrms Fs = 4.5 MHz (100% modulation = 25 KHz FM deviation) 95 60 Reference 0 dB at 1.0 KHz, Measure from 50 Hz to 15 KHz Depends on Audio PLL loop filter components At 1.0 KHz, 100% modulation (25 KHz) No video Pre-emphasis -2.5 100 71 -- 104 80 +2.0 % K dB B A C
Audio Input Impedance Audio Frequency Response
Audio Distortion FM (THD only) Audio S/N
-- 51
0.5 56
1.0 --
% dB
C C
1. See Performance Measurement Test Set-ups, Table 9.
MC44CC375AV Digital Home Freescale Semiconductor 7
CHARACTERIZATION MEASUREMENT CONDITIONS
* * Device default configuration unless otherwise specified: CH3 - 61.25 MHz and CH4 - 67.25 MHz frequencies RF Inputs / Output into 75 Load using a 75 to 50 transformation * * Video Input 1.0 V pk-pk Audio pre-emphasis circuit engaged
Table 9. Performance Measurement Test Set-Ups Device and Signals Set-Up RFOUT Output Level Video: 10 steps grey scale No audio Measured picture carrier in dBV with the HP8596E Spectrum Analyzer using a 75 to 50 transformation, all cables losses and transformation pads having been calibrated. Measurement is used as a reference for other tests: RFOUT Sound Subcarrier Harmonics Video: 10 steps grey scale No audio signal Measure in dBc second and third sound harmonics levels in reference to picture carrier (RFOUT).
Picture carrier Sound carrier
Measurement Set-Up
Sound 2nd harm Sound 3rd harm Fo +4.5 MHz +9 MHz +13.5 MHz
Second Harmonics of Chroma Subcarrier No audio Video: a 700 mV(pp) 100 kHz sinusoidal signal is inserted on the black level of active video area. Measure in dBc, in reference to picture carrier (RFOUT), second harmonic of chroma at channel frequency plus 2 times chroma frequency, resulting in the following spectrum.
Picture carrier Chroma carrier 700 mVpkpk
700mV pk-pk
Sound carrier Chroma 2nd Harmonic
Frequency Frequency 100kHz 100 kHz
Fo
+3.58 MHz +4.5 MHz
+7.16 MHz
Chroma/Sound Intermodulation No audio signal Video: 700 mV(pp) 100 kHz sinusoidal signal inserted on the black level of active video area.This is generated using a Video Generator and inserting the required frequency from a RF Signal generator. Measure in dBc, in reference to picture carrier (RFOUT), intermodulation product at channel frequency plus the sound carrier frequency (+5.5 MHz) minus the chroma frequency (-4.43 MHz), resulting in the following spectrum. Intermodulation product is at the channel frequency +1.07 MHz.
Picture carrier Chroma carrier 700 mVpkpk
700mV pk-pk
Frequency Frequency 100kHz 100 kHz
Sound carrier
Chroma/Sound Intermod.
Fo
+0.92 MHz
+3.58 MHz +4.5 MHz
MC44CC375AV 8 Digital Home Freescale Semiconductor
Table 9. Performance Measurement Test Set-Ups (continued) Device and Signals Set-Up Measurement Set-Up Picture Carrier Harmonics No video signal No audio signal Measure in dBc, in reference to picture carrier (RFOUT), second and third harmonic of channel frequency, resulting in the following spectrum.
Picture carrier
2nd harmonic
3rd harmonic
Fo
2Fo
3Fo
Out of Band Spurious No video signal No audio signal Measure in dBV spurious levels at 0.25, 0.5, 0.75 and 1.5 times channel frequency, resulting in the following spectrum. Measure from 40 MHz to 1.0 GHz.
Picture carrier
Spurious
Fo/4
Fo/2 Fo*3/4
Fo
Fo*3/2
In Band Spurious / 4 MHz Crystal Spurious No video signal No audio signal Measure in dBc, in reference to picture carrier (RFOUT), spurious levels falling into video bandwidth Fo 4.2 MHz (15.125 KHz & 31.25 KHz from reference dividers and 4 MHz from crystal). Video Bandwidth No audio The Video signal is demodulated on the spectrum analyzer, and the peak level Video: 600 mV(pp) sinusoidal signal inserted of the 100 KHz signal is measured as a reference. The frequency is then swept from 100 KHz to 4.2 MHz, and then the difference in dBc from the 100 KHz on the black level of active video area. reference level is measured. Weighted Video Signal to Noise Video: 100% White video signal -- 1 Vpk-pk. No audio signal This is measured using a Demodulator using a CCIR Rec. 567 weighting network, 100 KHz to 4.2 MHz band with sound trap and envelope detection, and a Video Analyzer. The Video Analyzer measures the ratio between the amplitude of the active area of the video signal (700 mV) and the noise level in Vrms on a video black level which is shown below. VideoS/N is calculated as 20 x log(700 /N) in dB.
N noise level in Vrms
Unweighted Video Signal to Noise Same as above with CCIR filter disabled. Same as above.
MC44CC375AV Digital Home Freescale Semiconductor 9
Table 9. Performance Measurement Test Set-Ups (continued) Device and Signals Set-Up Measurement Set-Up Video Differential Phase Video: 5 step Grey Scale -- 1 V(pp). No audio signal This is measured using a Demodulator using a CCIR Rec. 567 weighting network, 100 KHz to 4.2 MHz band with sound trap, and envelope detection, and a Video Analyzer. On line CCIR 330, the video analyzer DP measure consists of calculating the difference of the Chroma phase at the black level and the different chroma subcarrier phase angles at each step of the greyscale. The largest positive or negative difference indicates the distortion.
the largest positive or negative difference DIFF PHASE = the phase at position 0 * 100%
The video analyzer method takes the worst step from the first 4 steps. Video Differential Gain Video: 5 step Grey Scale -- 1 V(pp). No audio signal This is measured using a Demodulator using a CCIR Rec. 567 weighting network, 100 KHz to 4.2 MHz band with sound trap and envelope detection, and a Video Analyzer. On line CCIR 330 shown below, the video analyzer DG measure consists of calculating the difference of the Chroma amplitude at the black level and the different amplitudes at each step of the greyscale. The largest positive or negative difference indicates the distortion.
0
1
3 2 4
5
5-step Greyscale with Chroma subcarrier superimposed (not to scale), line CCIR 330.
the largest positive or negative difference DIFF GAIN = the amplitude at position 0
* 100%
The video analyzer method takes the worst step from the first 4 steps. CCIR line 330 corresponds to FCC line 17 in NTSC/M standard. Video Modulation Depth No audio signal Video: 10 step grey scale This is measured using a HP8596E Spectrum Analyzer with a TV Trigger option, allowing demodulation and triggering on any specified TV Line. The analyzer is centered on the maximum peak of the Video signal and reduced to zero Hertz span in Linear mode to demodulate the Video carrier.
A ( 6-10mV) A(mV)
B(mV) B (0.6 - 3mV)
TV Line Demodulated by Spectrum Analyzer-BG standard
The Modulation Depth is calculated as (A-B)/A x 100 in%. Picture to Sound Ratio No video signal No audio signal Measure in dBc sound carrier in reference to picture carrier (RFOUT) ,
Picture carrier
Sound carrier
Fo
+4.5 MHz
MC44CC375AV 10 Digital Home Freescale Semiconductor
Table 9. Performance Measurement Test Set-Ups (continued) Device and Signals Set-Up Measurement Set-Up Audio Modulation Index -- FM Modulation Video: Black Sync Audio signal: 1.0 KHz, 205 mVrms. This is measured using a Demodulator and an Audio Analyzer at 1.0 KHz. The audio signal 205 mV at 1.0 KHz is supplied by the Audio Analyzer, and the FM demodulated signal deviation is indicated on the Demodulator in KHz peak. This value is then converted in% of FM deviation, based on specified standards. Audio Frequency Response Video: Black Sync Audio signal: 50 Hz to 15 KHz, 100 mVrms This is measured using a Demodulator and an Audio Analyzer. The audio signal 1.0 KHz 100 mVrms is supplied by the Audio Analyzer, demodulated by the Demodulator and the audio analyzer measures the AC amplitude of this demodulated audio signal: this value is taken as a reference (0 dB). The audio signal is then swept from 50 Hz to 15 KHz, and demodulated AC amplitude is measured in dB relative to the 1.0 KHz reference. Audio pre-emphasis and de-emphasis circuits are engaged, all audio analyzer filters are switched OFF. Audio Distortion FM Audio: 1.0 KHz, adjustable level Video: Black Sync This is measured using a Demodulator and an Audio Analyzer at 1.0 KHz. The output level of the Audio analyzer is varied to obtain a deviation of 25 KHz indicated on the Demodulator. The input rms detector of the Audio Analyzer converts the ac level of the combined signal + noise + distortion to dc. It then removes the fundamental signal (1.0 KHz) after having measured the frequency. The output rms detector converts the residual noise + distortion to dc. The dc voltmeter measures both dc signals and calculates the ratio in% of the two signals. ADist = ( Distorsion + Noise ) ( Distorsion + Noise + Signal ) Audio Signal to Noise Audio: 1.0 KHz, adjustable level Video: EBU Color Bars This is measured using a Demodulator and an Audio Analyzer at 1.0 KHz. The output level of the Audio analyzer is varied to obtain a Modulation Deviation of 25 KHz indicated on the AMFS Demodulator. The Audio Analyzer alternately turns ON and OFF its internal audio source to make a measure of the Audio signal plus noise and then another measure of only the noise. The measurement is made using the internal CCIR468-2 Filter of the Audio Analyzer together with the internal 30 2.0 KHz (60 dB/decade) Lowpass filters. The AMFS demodulator uses a quasi-parallel demodulation as is the case in a normal TV set. In this mode the Nyquist filter is bypassed and the video carrier is used without added delay to effectuate intercarrier conversion. In this mode the phase noise information fully cancels out and the true S/N can be measured. ASN ( dB ) = 20 x log ( Signal + Noise ) ( Noise )
MC44CC375AV Digital Home Freescale Semiconductor 11
PIN CIRCUIT SCHEMATICS
VDD
VCC VDD
Pin 8: VIDEO Pin 1: CHS
500 10K
10K
VDD
75 VDD1.8 VDD
75
Pin 11: RFOUT
Pin 3: SOC
VCC
Pin 4: XTAL
Pin 14: PLLFLT
VCC VCC
Pin 15: AUX Pin 5: PREEM
10k 11.8k
audio
VDD
VDD VCC
50k
Pin 16: PSAVE Pin 6: AUDIO
VCC
Pin 7: SPLFLT
Figure 3. Pin Schematics MC44CC375AV 12 Digital Home Freescale Semiconductor
5
4
3
2
1
MC44CC375xx Control Lines
6 5 4
SW1 3.3V H L C17 100nF U1 MC44CC375xx 1 CHS PSAVE Note 2 2 GND AUXIN C12 33nF R2 7K PLLFLT NC VCC RFOUT C27 R7 500K C6 2.2uF Note 7 for Stereo R1 L1 8.2uH_c_1008 / 0 ohm R13 220 / 0 ohm R3 75 R14 2.2K / DNI L1 and F1 are for 4.5MHz NTSC Audio Traps. Other Video standards will require use of a different trap network. Note 8 C9 100nF 5V J1 3 2 1 3 2 1 C25 10uF J7 J8 J9 J10 MT1 MTHOLE MT3 MTHOLE
4 3
All Resistors are 5% unless otherwise noted. All Capacitors are XR7/XR5 type unless noted, (10% type are COG/NPO)
J2
5V
Sound CH Power Osc SEL Save ------ ------------OFF 4 Normal ON 3 PowerSave AUX Aurial Input J6 16 15 14 Pin 13 Needs to be Quiet 3.3V 13 12 11 10 1nF L2 6.8nH C14 4.7pF Note 3 C23 100nF C22 1nF Resistor Divider for Psudo 3.3V supply 3.3V R11 ? 3.3V C24 10uF R12 ? C11 100nF 5V C15 6.2pF 9 C13 4.7nF R5 100K
1 2 3
D
PowerSave ChannelSelect SoundOscControl
Figure 4. MC44CC375AV Application Schematic
2
Digital Home Freescale Semiconductor
D
7 6 5 4 3 2 1
PowerSave ChannelSelect SoundOscControl
HEADER 7X1 Automated Test Equipment Interface C2 12pF Y1 4.000Mz C1 27pF Note 1 4 XTAL PREEMP AUDIO SPLFLT GND VCC VIDEO C3 1nF C8 100nF C18 1.5pF L3 6.8nH C16 4.7pF C19 1.5pF 5 6 Note 5 C10 100nF C7 1.6K 3.3V 68nF 8 R6 500K 7 R4 10K 3.3V Note 3a C4 750pF 5-10% Notes 4,6 3 SOC
Switch is oriented such that an "UP" switch applies a HI level to the pin. Down is closed. CHS, PS, and SOC have internal pull up resistors. C5 100nF
RF Output J5
C
Audio Input
C
J3
R19 25 R18 25 R17 100
Video Input
TP4 F1 tps4_5mb2 / DNI 3 1
J4
APPLICATION SCHEMATIC
B
B
A
MT2 MTHOLE MT4 Size A MTHOLE Date: Title MC44CC375xx CMOS Modulator Schematic Friday, September 12, 2008
2
A
NOTES 1. C1 and C2 values depends on the crystal characteristics Set C2 value such that crystal operates at 4.0MHz. C1 = 27pF, C2 = 12pF on the Freescale evaluation board with an ECS Inc. ECS-40-20-1 crystal. 2. RF PLL loop-filter components (C12, C13, R2) must be as close as possible to pin 14 and Ground. 3. Supply voltage decoupling capacitors (C3, C8, C22, C23) must be as close as possible to the device power pins (P9, and P12). Power should feed through the caps to the device. 3a. Pin 7 bias, connect to pin 9 Vcc. 4. C4 pre-emphasis cap value depends on video standard. PAL B,G,I has a 50S time constant, C4 = 470pF. NTSC M/N has a 75 S time constant, C4 = 750 pF. 5. The value of the audio input capacitor, C5, can be increased to 220nF to improve low frequency response. STEREO APPLICATIONS ONLY: 6. If the audio signal is encoded and pre-emphasis is applied in the baseband stereo encoder, it is not necessary to add pre-emphasis in the RF modulator and the pre-emphasis capacitor C4 should be removed. 7. Parts as listed are for Mono applications; For Stereo, C6 = 20uF, R1 = 0 ohm, C7 = DNI 8. Audio Trap is to keep wideband video out of the Audio Spectrum. NTSC Part Number = Murata TPSRA4M50B00-B0, PAL Part Number = Murata TPSRA5M50B00.
Rev 0.2 Sheet 1
1
of
1
5
MC44CC375AV
13
PACKAGE DIMENSIONS
Figure 5. SOIC16 Package Dimensions
MC44CC375AV 14 Digital Home Freescale Semiconductor
PACKAGE DIMENSIONS
Figure 6. SOIC16 Package Dimensions - part 2
MC44CC375AV Digital Home Freescale Semiconductor 15
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Document Number: MC44CC375AV Rev. 1 11/2008

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