Freescale Semiconductor, Inc. Technical Data MC44BC375/D Rev. 2.6 01/2003 MC44BC375/U/J/T MC44BC375/U/J/T PLL Tuned VHF Audio/ Video High Integration Modulator ICs Freescale Semiconductor, Inc... SO16 Package Ordering Information Device Temp. Range Package MC44BC375UD, R2 MC44BC375JD, R2 MC44BC375TD, R2 -20°C to +85°C SO16NB NOTE: For tape and reel, add R2 suffix. Contents List 1 2 3 4 5 6 Features . . . . . . . . . . . . . 2 Device Overview . . . . . . 3 Maximum Ratings . . . . . 4 Thermal Rating . . . . . . . 4 Electrostatic Discharge 4 Electrical Characteristics 5 7 Pin Selection . . . . . . . . . 6 8 High Frequency Characteristics (U Version) 6 9 Video Characteristics . . 7 10 Audio Characteristics . . 7 11 Characterization Measurement Conditions 7 12 Modulator Functionality 11 13 Pin Circuit Schematics 14 14 MC44BC375U Application Schematic 15 15 Markings and Case Diagrams 16 This modulator circuit is for use in VCRs, set top boxes and similar devices. The device differences are as follows: • MC44BC375U VHF [CH3 & CH4] (Americas) • MC44BC375J VHF [CH1 & CH2] (Japan) • MC44BC375T VHF [CH13] (Taiwan) SFS CHS 1 16 PSS 2 15 PLLFLT LOP 3 14 TVOVCC XTAL 4 13 TVOUT GND 5 12 GND PREEM 6 11 VCCA AUDIO 7 10 VIDEO SPLFLT 8 9 PSave/LO Figure 1. MC44BC375U/J/T Pin Connection Diagram This document contains information on a product under development. Freescale reserves the right to change or discontinue this product without notice. © Motorola, Inc., 2002. All rights reserved. For More Information On This Product, Go to: www.freescale.com Features Freescale Semiconductor, Inc. 1 Features Channels are selectable using pin Channel Selection (CHS) and tuned by a PLL. They do not require any external tank circuit components thus reducing the sensitivity of the PCB design and the need for external adjustments. The PLL obtains its reference from a 4MHz crystal oscillator. The sound subcarrier is also generated on-chip without external components. The 4.5MHz or 5.5MHz Sound frequency is selectable using pin Sound Frequency Selection (SFS). The Picture to Sound subcarrier ratio is also selectable by pin Picture to Sound selection (PSS) to either 14dB or 16dB. A Power Save function is selectable via pin Psave/LO which turns off all internal VCOs and mixers and simultaneously switches ON the Logic Output Port (LOP). No external Varicap Diodes/ Inductor nor other tuned components are needed. Freescale Semiconductor, Inc... The MC44BC375/U/J/T also has the following features: • Channel selected by CHS pin • Integrated On-Chip Oscillator - No external tank circuit • Extremely Low External Components Count • Adjustable Video Modulation Depth (85% w/o adjustment) • Peak White Clip • Programmable Picture/Sound Carrier Ratio (14dB & 16dB) selected by PSS pin • Integrated On-chip Programmable Sound Subcarrier Oscillator (4.5 & 5.5MHz selected by SFS pin) No external varicaps • Modulator Standby Mode selected by Psave/LO pin • Transient Output Inhibit During PLL Lock-up at Power-on • Logic Output Port selected by Psave/LO pin (Antenna Switch Driver) • Extremely Robust ESD protection, Minimum 4kV, typical 6kV. • Available in 80 dBuV RF output level (MC44BC375UA). MC44BC375/U/J/T Technical Data For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc. Device Overview 2 Device Overview Figure 2 shows a simplified block diagram of the MC44BC375U/J/Tdevice. The MC44BC375U/J/T device has two main sections: 1. A modulator section which accepts audio and video inputs and modulates the VHF carrier. 2. A PLL section to synthesize the UHF/VHF output channel frequency (from an integrated UHF oscillator, divided for VHF output) The high frequency BICMOS technology permits integration of tank circuit and certain filtering functions. VIDEO LOP 10 Freescale Semiconductor, Inc... 3 Peak White Clip TVOVCC Video Modulator 14 75Ω TVOUT 8 MODULATOR SECTION Clamp 31.25kHz Sound Oscillator and FM Modulator Sound PFD LPF Snd Freq Select - SFS Audio Ampli 7 AUDIO 6 PREEM 13 Prog. Divider Power save Psave/ LOP SPLLFLT LPF ALC LPF PSS 11 VCCA 5 GND 9 Sound Modulator SFS Test Mode Divider 16 Channel Select CHS 1 PS1/2 Select - PSS 2 VHF Divider UHF OSC. Prog. Divider Prescaler /8 VCO & PLL SECTION PLL Phase Comp. 31.25kHz Ref Divider /128 4Mhz XCO CHS 12 GND 15 PLLFLT Figure 2. MC44BC375/U/J/T Block Diagram MC44BC375/U/J/T Technical Data For More Information On This Product, Go to: www.freescale.com 4 XTAL Maximum Ratings Freescale Semiconductor, Inc. 3 Maximum Ratings Sym Vcc Parameter Value Unit Supply voltage 6 V o This device contains protection circuitry to guard against damage due to high static voltage or electric fields. However, precautions must be taken to avoid Tamin Minimum operating ambient temperature –20 Tamax Maximum operating ambient temperature 85 oC –65 oC operation, input and output voltages should be 150 o constrained to the ranges indicated in the 150 °C Tstgmin Minimum storage temperature Tstgmax Maximum storage temperature Tj Junction Temperature C C applications of any voltage higher than maximum rated voltages to this high impedance circuit. For proper Recommended Operating Conditions. Freescale Semiconductor, Inc... Maximum ratings are those values beyond which damage to the device may occur. For functional operation, values should be restricted to the Recommended Operating Condition. Meets Moisture Sensitivity Level 1, no dry pack required. 4 Thermal Rating Sym Rthja Parameter Value Unit 140 °C/W Min Typ Thermal resistance from Junction to Ambient 5 Electrostatic Discharge Electrostatic Discharge (ESD) tests are done on all pins. Sym Parameter Unit ESD MM (Machine Model) - MIL STD 883C method 3015-7 200 500 V ESD HBM (Human Body Model) - MIL STD 883C method 3015-7 4000 6000 V MC44BC375/U/J/T Technical Data For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc. Electrical Characteristics 6 Electrical Characteristics • A = 100% Tested • B = 100% Correlation tested • C = Characterized on samples • D = Design parameter 6.1 Specification Conditions Unless otherwise stated: Vcc = 5.0V, T amb. = 25°C.Video input 1Vp-p, 10 step greyscale. RF inputs / outputs into 75Ω load. SPECIFICATIONS ONLY VALID FOR ENVELOPE DEMODULATION Freescale Semiconductor, Inc... Power Supply Parameters Min Typ Max Operating Supply Voltage range 4.5 5.0 5.5 V Total Supply Current 40 47 55 mA All sections active A Total Standby Mode Supply Current 3 5 7 mA PSave/LO=LO A DC Parameter Unit Min Threshold voltage level on pins CHS, PSS, SFS, PSave/LO Notes Type B Typ Max Unit Type V C Sound Comparator Charge Pump Current: During locking When locked 7 2.1 10 12 µA A 0.7 1 1.5 µA A RF Comparator Charge Pump Current 60 100 150 µA A Crystal Oscillator Stability - negative resistance 1 - - KΩ D Logic Output Port: Saturation voltage @ I=15mA Leakage current - 210 - 300 1 mV uA A A MC44BC375/U/J/T Technical Data For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc. Pin Selection 7 Pin Selection Pin Nb Pin Name Device LO (grounded) CH4 CH2 CH13 HI (Open or +5V) 1 CHS MC44BC375U MC44BC375J MC44BC375T CH3 CH1 CH13 2 PSS MC44BC375U/J/T 14dB 16dB Normal Operation LOP pin HI (High impedance 4.5Mhz 9 PSave/LO MC44BC375U/J/T Power save Mode LOP pin LO (Low voltage) 16 SFS MC44BC375U/J/T 5.5Mhz By default (open condition), all pins are “HI”. Freescale Semiconductor, Inc... 7.1 Test Modes Pin DC level Description Vcc + 0.3V Vcc + 1.1V Low frequency testing (RF frequency divided by 4 for MC44BC375U/J, and divided by 8 for MC44BC375T) Base band test mode (DC drive applied to modulators) Vcc + 1Vbe Transient Output Inhibit Disabled CHS PSS SFS Vcc + 1Vbe Sound Oscillator OFF VIDEO Vcc + 0.3V Vcc + 1.1V Force UHF and Sound PLL Upper current source Force UHF and Sound PLL Lower current source NOTE: Test modes are intended for manufacturing test purpose only and not to be be used for normal application. 8 High Frequency Characteristics (U Version) For all the following specifications and unless otherwise stated: Vcc = 5.0V, T amb. = 25°C.Video input 1Vp-p, 10 step greyscale.RF inputs / outputs into 75Ω load.SPECIFICATIONS ONLY VALID FOR ENVELOPE DEMODULATION. Measured on U version on both channel 3 and 4. See Section 11, “Characterization Measurement Conditions” on page 7 for “C” type parameters. Parameter Test Conditions TV OUT output level Min Typ Max Unit Type 74 76 79 dBµV B Sound subcarrier Harmonics (fp+n*fs) Ref Picture carrier - -73 -65 dBc C Second Harmonic of chroma subcarrier. Using red EBU bar - -65 -55 dBc C Chroma/Sound intermodulation: fp + (fsnd-fchr) Using red EBU bar - -65 -60 dBc C 30 66 42 69 dBµV dBµV C C 27 dBµV C Fo (picture carrier) Harmonics (See Note1) 2nd harmonic 3rd harmonic Out Band (picture carrier) Spurious 1/2*Fo - 1/4*Fo - 3/2*Fo - 3/4*Fo In band spurious (Fo +/- 5 MHz range) No video or sound modulation -70 -62 dBc C 4 MHz Crystal Spurious (Fo +/- 4 MHz) No video or sound modulation -82 -75 dBc C Note: 1: Picture carrier harmonics are highly dependant on PCB layout and decoupling capacitors. MC44BC375/U/J/T Technical Data For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc. Video Characteristics 9 Video Characteristics Parameter Test Conditions Video bandwidth Reference 0dB at 100kHz, measured at 5MHz Video input level 75Ohm load Typ Max Unit Type -1.5 -0.5 — dB C — — 1.5 Vcvbs D — 0.2 1 µA A 500 — — KΩ A 49 56 52 60 — — dB dB C C +/-1 +/-5 deg C 1 5 % C 6.8/3.2 — 7.2/2.8 — B 80 85 90 % B 90.5 95 99.5 % B Video input current Video input impedance Video S/N Min Unweighted Weighted Differential Phase Freescale Semiconductor, Inc... Differential Gain Luma/Sync ratio Input ratio 7.0:3.0 Video modulation depth Video input level=1.0 Vcbvs Peak White Clip Video Modulation Depth for Video=1.4 Vcbvs 10 Audio Characteristics All audio measurement use specified pre-emphasis circuit. Parameter Test Conditions Min Typ Max Unit Type Picture to Sound ratio PSS (Pin2) = HI PSS (Pin2) =LO 14 12 16 14 18 16 dB dB B Picture to Sound ratio difference between PSS = HI and PSS = LO 1.5 2.0 2.5 dB B Using specific pre-emphasis circuit - Audio Input: 1Khz @ 205 mVrms Audio FM Modulation Depth Fs = 4.5 MHz (100% Modulation = +/- 25 kHz FM Deviation) 75 85 95 % B Fs = 5.5 MHz (100% Modulation = +/- 50 kHz FM Deviation) 75 85 95 % B 45 55 61 kΩ A -2.5 - +2 dB C - 0.3 1 % C 50 53 - dB C Audio input resistance Audio Frequency response 0dB ref @1kHz Measure from 50Hz to 15kHz Audio Distortion FM (THD only) At 1 kHz and 100% mod (+/- 50 kHz) - No Video Audio S/N with Sync Buzz FM 11 Characterization Measurement Conditions Device default configuration unless otherwise specified: • Sound subcarrier frequency = 5.5Mhz • Picture-to-sound carrier ratio = 12dB • CH3 & CH4 frequencies RF Inputs / Output into 75ohm Load using a 75 to 50 ohm transformation.Video Input 1V pk-pk.Audio pre-emphasis circuit engaged. MC44BC375/U/J/T Technical Data For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc. Characterization Measurement Conditions Device and Signals Set-up Measurement Set-up TVOUT Output Level Measured picture carrier in dBuV with the HP8596E Spectrum Analyzer using a 75 to 50 ohm transformation, all cables losses and transformation pads having been calibrated. Measurement used as a reference for other tests: TVout_Ref Video: 10 steps grey scale No audio Sound Subcarrier Harmonics Measure in dBc second and third sound harmonics levels in reference to picture carrier (TVout_Ref). Picture carrier Sound carrier Freescale Semiconductor, Inc... Video: 10 steps grey scale No Audio signal Sound 2nd harm Sound 3rd harm Fo +5.5Mhz +11Mhz +16.5Mhz Second Harmonics of Chroma subcarrier Measure in dBc, in reference to picture carrier (TVout_Ref), second harmonic of chroma at channel frequency plus 2 times chroma No audio Video: a 700mVpk-pk 100Khz sinusoidal frequency, resulting in the following spectrum. signal is inserted on the black level of Picture carrier active video area. Frequency Frequency 100kHz 100Khz Chroma carrier 700mVpkpk 700mV pk-pk Sound carrier Chroma 2nd Harmonic Fo +4.43Mhz +5.5Mhz +8.86Mhz Chroma/Sound intermodulation No audio signal Video: 700mVpk-pk 100Khz sinusoidal signal inserted on the black level of active video area.This is generated using a Rohde & Schwarz Video Generator SAF and inserting the required frequency from a RF Signal generator. Frequency Frequency 100kHz 4.43Mhz Measure in dBc, in reference to picture carrier (TVout_Ref), intermodulation product at channel frequency plus the sound carrier frequency (+5,5Mhz) minus the chroma frequency (-4,43Mhz), resulting in the following spectrum. Intermodulation product is at the channel frequency +1,07Mhz. Picture carrier Chroma carrier 700mVpkpk 700mV pk-pk Sound carrier Chroma/Sound Intermod. Fo +1.07Mhz +4.43Mhz +5.5Mhz Picture Carrier Harmonics MC44BC375/U/J/T Technical Data For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc. Characterization Measurement Conditions Device and Signals Set-up Measurement Set-up Measure in dBc, in reference to picture carrier (TVout_Ref), second and third harmonic of channel frequency, resulting in the following spectrum. Picture carrier No Video signal No Audio signal 3rd harmonic 2nd harmonic Fo 2Fo 3Fo Out of Band Spurious Freescale Semiconductor, Inc... Measure in dBuV spurious levels at 0.25, 0.5, 0.75 and 1.5 times channel frequency, resulting in the following spectrum Measure from 40Mhz to 1Ghz. Picture carrier No Video signal No Audio signal Spurious Fo/4 Fo/2 Fo*3/4 Fo Fo*3/2 In Band Spurious / 4Mhz Crystal Spurious Measure in dBc, in reference to picture carrier (TVout_Ref), spurious levels falling into video bandwidth Fo+/-5Mhz (15.125Khz & 31.25Khz from reference dividers and 4Mhz from crystal). No Video signal No Audio signal Video Bandwidth No audio Video: 600mVpk-pk sinusoidal signal inserted on the black level of active video area. The Video signal is demodulated on the spectrum analyzer, and the peak level of the 100Khz signal is measured as a reference. The frequency is then swept from 100Khz to 5Mhz, and then the difference in dBc from the 100Khz reference level is measured. Weighted Video Signal to Noise Video: 100% White video signal - 1Vpkpk. No Audio signal This is measured using a Rohde & Schwarz AMFS Demodulator in B/G (using a CCIR Rec. 567 weighting network, 100kHz to 5MHz band with sound trap and envelope detection, and a Rohde & Schwarz UAF Video Analyzer. The Video Analyzer measures the ratio between the amplitude of the active area of the video signal (700mV) and the noise level in Vrms on a video black level which is show 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. Video Differential Phase MC44BC375/U/J/T Technical Data For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc. Characterization Measurement Conditions Device and Signals Set-up Measurement Set-up Video: 5 step Grey Scale- 1Vpk-pk. No Audio signal This is measured using a Rohde & Schwarz AMFS Demodulator in B/G (using a CCIR Rec. 567 weighting network, 100kHz to 5MHz band with sound trap, and envelope detection, and a Rohde & Schwarz UAF 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 Freescale Semiconductor, Inc... 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. Video: 5 step Grey Scale- 1Vpk-pk. No Audio signal This is measured using a Rohde & Schwarz AMFS Demodulator in B/G (using a CCIR Rec. 567 weighting network, 100kHz to 5MHz band with sound trap and envelope detection, and a Rohde & Schwarz UAF Video Analyzer. 1 0 2 3 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 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 centred on the maximum peak of the Video signal and reduced to zero Hertz span in Linear mode to demodulate the Video carrier. A(mV) A ( 6-10mV) No Audio signal Video: 10 step grey scale 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 Measure in dBc sound carrier in reference to picture carrier (TVout_Ref) for “PS” bit=0 (PS=12dB typical) and for “PS” bit=1 (PS=16dB), Picture carrier No Video signal No Audio Signal “PS” bit set to 0 and 1 Sound carrier Fo +5.5Mhz Audio Modulation Depth - FM Modulation MC44BC375/U/J/T Technical Data For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc.Modulator Functionality Device and Signals Set-up Measurement Set-up Video Black Level Audio signal: 1Khz, 205mVrms. This is measured using a Rohde & Schwarz AMFS Demodulator in B/G and a HP8903A Audio Analyzer at 1kHz The audio signal 205mV at 1kHz 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 Freescale Semiconductor, Inc... The audio signal 1KHz 100mVrms is supplied by the Audio Analyzer, demodulated by the Demodulator and the audio analyzer measures the Video Black Level AC amplitude of this demodulated audio signal: this value is taken as a Audio signal: 50Hz to 15KHz, 100mVrms reference (0dB). This is measured using a Rohde & The audio signal is then swept from 50Hz to 15KHz, and demodulated Schwarz AMFS Demodulator in B/G and AC amplitude is measured in dB relative to the 1KHz reference. a HP8903A. Audio pre-emphasis and de-emphasis circuits are engaged, all audio analyzer filters are switched OFF. Audio Distortion FM 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 (1kHz) after having measured the frequency. The Audio: 1Khz, adjustable level output rms detector converts the residual noise + distortion to dc. The dc Video Black Level voltmeter measures both dc signals and calculates the ratio in% of the This is measured using a Rohde & Schwarz AMFS UHF Demodulator in B/G two signals. and a HP8903A Audio Analyzer at 1kHz. The output level of the Audio analyzer is ADist = ( Distorsion + Noise ) ⁄ ( Distorsion + Noise + Signal ) varied to obtain a deviation of 50kHz indicated on the Demodulator. Audio Signal to Noise The Audio Analyzer alternately turns ON and OFF it's internal audio source to make a measure of the Audio signal plus noise and then another measure of only the noise. Audio: 1Khz, adjustable level The measurement is made using the internal CCIR468-2 Filter of the Video: EBU Color Bars Audio Analyzer together with the internal 30+/-2kHz (60dB/decade) This is measured using a Rohde & Schwarz AMFS Demodulator in B/G and Lowpass filters. a HP8903A Audio Analyzer at 1kHz. The 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 output level of the Audio analyzer is the video carrier is used without added delay to effectuate intercarrier varied to obtain a Modulation Deviation conversion. In this mode the phase noise information fully cancels out of 25kHz indicated on the AMFS and the true S/N can be measured Demodulator. ASN ( dB ) = 20 × log ( Signal + Noise ) ⁄ ( Noise ) 12 Modulator Functionality 12.1 Power Supply The two device Vccs (pins 11 and 14) must be applied at the same time to ensure all internal blocks are correctly biased. All other pins must not be biased before Vcc is applied to device. MC44BC375/U/J/T Technical Data For More Information On This Product, Go to: www.freescale.com Modulator Functionality Freescale Semiconductor, Inc. 12.2 Test modes The MC44BC375U/J/T test modes are enabled by any voltage level higher than Vcc on pins CHS, PSS, SFS and VIDEO. Care must be taken in the application to not reach levels higher than Vcc on those pins. 12.3 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. Modulator is programmed in standby mode when pin 9 PSave/LO is set to “LO” level (See PIN SELECTION section). Freescale Semiconductor, Inc... 12.4 Logic Output Port The Logic Output Port is used to control an external switch (such as an antenna switch or an attenuator). This pin is an open collector transistor able to drive up to 15mA at low voltage. LOP level is switched between “HI” and “LO” level with pin 9 “Psave/LO” (See PIN SELECTION section). 12.5 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 from zero (i.e. Vcc is switched from 0V to 5V or device is switched from “Standby mode” to “Normal operation”). There is a time-out of 263ms until the output is enabled. This lets the UHF PLL settle to its programmed frequency. During the 263ms time-out, the sound PLL current source is set to 10µA typical to speed up the locking time; after the 263ms time-out, the current source is switched to 1 µA. Use care when selecting loop filter components, to ensure the loop transient does not exceed this delay. For test purposes, it is possible to disable the 263ms delay (see TEST MODES section). 12.6 Video section The modulator requires a composite video input with negative going sync pulses and a nominal level of 1Vp-p. This signal is AC coupled to the video input where the sync tip level is clamped. Video modulation depth typical value is given for 1VCBVS input level. It can be adjusted to any lower value 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 overmodulation of the carrier by the video is avoided. The clipping function is always engaged. 12.7 Sound section The multivibrator oscillator is fully integrated and does not require any external component. An internal low pass filter and matched structure give very low harmonics level. 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. MC44BC375/U/J/T Technical Data For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc.Modulator Functionality The audio pre-emphasis circuit is a high-pass filter with an external capacitor C1 and an internal resistor (100kOhms typical). The recommended capacitor value (750pF) is for M/N standards; time constant is 75µs. It is 470pF for B/G standards (50µs). Audio bandwidth specification is for 50Hz to 15Khz range, with pre-emphasis circuit engaged. Without this pre-emphasis circuit, it is possible to extend the audio bandwidth to the high frequencies as there is no internal frequency limitation (stereo application). 12.8 PLL Section — Dividers The reference divider is a fixed divide by 128 resulting in a reference frequency of 31.25Khz with a 4.0Mhz crystal. The 31.25Khz reference frequency is used for both UHF and Sound PLLs. Freescale Semiconductor, Inc... The prescaler is a fixed divide by 8 and is permanently engaged. The VHF divider is different for each of the 3 versions. The programmable divider’s division ratio is controlled by CHS pin voltage in order to get the following VHF frequencies: Device Channel VHF divider CH3 = 61.25Mhz MC44BC375U 8 CH4 = 67.25Mhz CH1 = 91.25Mhz MC44BC375J 6 CH2 = 97.25Mhz MC44BC375T CH13 = 211.25Mhz 12.9 Selectable Pins Pins CHS, PSS, SFS are internally pulled up to 5V. MC44BC375/U/J/T Technical Data For More Information On This Product, Go to: www.freescale.com 3 Freescale Semiconductor, Inc. Pin Circuit Schematics 13 Pin Circuit Schematics VCC 100K CHS PSS SFS Psave VCC VCC LOP 5K XTAL Freescale Semiconductor, Inc... 1.5K VCC VCC 50k PREM 10k 11.8k audio VCC AUDIO IN VCC TV OUT VCC 5K VCC SPLLFLT 75 TVOVCC VCC VCC VCC 100 PLLFLT 2K 500 10K 10K Figure 3. Pin Schematics MC44BC375/U/J/T Technical Data For More Information On This Product, Go to: www.freescale.com VIDEO Freescale Semiconductor, Inc. MC44BC375U Application Schematic 14 MC44BC375U Application Schematic This document contains information on a new product under development Motorola reserves the right to change or discontinue this product without notice CH 3/4 Select O PS1/2 Select O SFS Select O Loop Filter must be as close as 47nF LOP 2 15 3 14 Cx*** 4MHz Pre-em C1 330nF 100nF 4 13 5 12 6 11 7 10 8 9 10nF 2.2k Vcc O 16 1nF O TVOUT O 1 O 10nF Vcc 1nF 220nF 75* 10k Psave/LO O Audio O R2** R1** 22nF O Freescale Semiconductor, Inc... 22nF Video *: This 75Ω is to match with a 75Ω video signal applied thru coaxial cable. It can be removed in case of high impedance video generator. R1 and R2 are to reduce video modulation depth from typical value (for example R1=1KΩ and R2=10KΩ reduce VMD by about 8%) Cx is dependant on the crystal characteristics (Cx=27pF on Motorola application Board) C1 value depends on standard: 470pF is for 50µs pre-emphasis time constant (B/G standard) and 750pF is for 75µs (M/N standard). Figure 4. MC44BC375U Application Schematic MC44BC375/U/J/T Technical Data For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc. Markings and Case Diagrams 15 Markings and Case Diagrams 15.1 Pin Description Freescale Semiconductor, Inc... N° Symbol Pin description Functionality Channel 3 / Channel 4 selection for MC44BC375U Channel 1 / Channel 2 selection for MC44BC375J Don’t care for the MC44BC375T 1 CHS Channel Select 2 PSS Picture to Sound Select PS=14dB / PS=16dB selection 3 LOP Logic Output Port Logic Output Level (Low voltage / high impedance) selectable via Pin 9 4 XTAL Crystal Crystal Oscillator input 5 Gnd Ground 6 PREEM Pre-emphasis 7 AUDIO Audio Input 8 SPLFLT Sound PLL Filter 9 PSave/LO PowerSave & Logic Output control 10 VIDEO Video Input 11 VCCA Voltage supply 12 GND Ground 13 TVOUT TV Output 14 TVOVCC Voltage supply 15 PLLFLT PLL Filter UHF PLL Filter 16 SFS Sound Frequency Select Sound frequency 4.5Mhz / 5.5Mhz selection Audio Pre-emphasis capacitor Normal Mode / Power save mode selection In Power Save Mode, the LOP pin is automatically switched to low voltage Modulated signal Output MC44BC375/U/J/T Technical Data For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc. Markings and Case Diagrams 15.2 Packaging Instructions Tape and reel packaging per 12MRH00360A with the following conditions applicable for Dual In-Line SOP (SOIC) package. Freescale Semiconductor, Inc... Component Orientation: Arrange parts with the pin 1 side closest to the tape's round sprocket holes on the tape's trailing edge. 15.3 Marking Instructions In accordance with 12MRH00191A internal specification applied for Dual in-line SO package. Bar marked part way accross Pin 1 end of package. Bar width 10 to 20 mils, length to be at least four times Bar width. Bar placement may extend across chamfer and dimple areas. MC44BC375x Pin 1 Dot or Dimple • 1st line: MC44BC375U for MC44BC375UD device MC44BC375J for MC44BC375JD device MC44BC375T for MC44BC375TD device (Part number coded on 10 digits) • 2nd line: Assembly site code AW (2 digits) followed by the wafer lot code L (1 digit), year Y (1 digit) and work week WW (2 digits) MC44BC375/U/J/T Technical Data For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc. Freescale Semiconductor, Inc... Markings and Case Diagrams Millimeters Inches Dim Min Max Min Max A 1.35 1.75 0.054 0.068 A1 0.1 0.25 0.004 0.009 D 9.8 10 0.385 0.393 E 5.8 6.2 0.229 0.244 E1 3.8 4 0.150 0.157 b 0.35 0.49 0.014 0.019 c 0.19 0.25 0.008 0.009 e 1.27 BSC 0.050 BSC L 0.4 1.25 0.016 0.049 h 0.25 0.5 0.010 0.019 Q 0o 7o 0o 7o Note: 1. Dimensions and Tolerances per ASME Y14.5M, 1994. Note: 2. Controlling dimension: Millimeters. Note: 3. Dimension D and E1 do not include mold protrusion. Note: side. 4. Maximum mold protrusion 0.15 (0.006) per Note: 5. Dimension b does not include Dambar protrusion. Allowable Dambar protrusion shall be 0.127 (0.005) total in excess of the b dimension at maximum material condition. Figure 5. SO16NB Package MC44BC375/U/J/T Technical Data For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc... Freescale Semiconductor, Inc. Markings and Case Diagrams MC44BC375/U/J/T Technical Data For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc... Freescale Semiconductor, Inc. Home Page: www.freescale.com email: [email protected] USA/Europe or Locations Not Listed: Freescale Semiconductor Technical Information Center, CH370 1300 N. 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MC44BC375/D For More Information On This Product, Go to: www.freescale.com