MC44BC375T [MOTOROLA]

PLL Tuned VHF Audio/ Video High Integration Modulator ICs; PLL调谐VHF音频/视频高集成调制器芯片
MC44BC375T
型号: MC44BC375T
厂家: MOTOROLA    MOTOROLA
描述:

PLL Tuned VHF Audio/ Video High Integration Modulator ICs
PLL调谐VHF音频/视频高集成调制器芯片

文件: 总20页 (文件大小:532K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
Freescale Semiconductor, Inc.  
Technical Data  
MC44BC375/D  
Rev. 2.6 01/2003  
MC44BC375/U/J/T  
PLL Tuned VHF Audio/  
Video High Integration  
Modulator ICs  
MC44BC375/U/J/T  
SO16 Package  
Ordering Information  
Temp. Range  
Device  
Package  
MC44BC375UD, R2  
MC44BC375JD, R2  
MC44BC375TD, R2  
-20°C to +85°C  
SO16NB  
NOTE: For tape and reel, add R2 suffix.  
Contents List  
This modulator circuit is for use in VCRs, set top boxes and similar devices. The device  
differences are as follows:  
1
2
3
4
5
6
Features . . . . . . . . . . . . . 2  
Device Overview . . . . . . 3  
Maximum Ratings . . . . . 4  
Thermal Rating . . . . . . . 4  
Electrostatic Discharge 4  
Electrical  
MC44BC375U VHF [CH3 & CH4] (Americas)  
MC44BC375J VHF [CH1 & CH2] (Japan)  
MC44BC375T VHF [CH13] (Taiwan)  
Characteristics  
5
7
8
Pin Selection . . . . . . . . . 6  
High Frequency  
Characteristics  
(U Version)  
6
9
Video Characteristics . . 7  
10 Audio Characteristics . . 7  
11 Characterization  
Measurement  
Conditions  
12 Modulator  
Functionality  
13 Pin Circuit Schematics 14  
SFS  
CHS  
PSS  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
7
PLLFLT  
11  
TVOVCC  
LOP  
14 MC44BC375U Application  
Schematic  
XTAL  
TVOUT  
GND  
15  
16  
GND  
15 Markings and Case  
Diagrams  
VCCA  
PREEM  
AUDIO  
VIDEO  
PSave/LO  
SPLFLT  
Figure 1. MC44BC375U/J/T Pin Connection Diagram  
This document contains information on a product under development. Motorola 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  
Freescale Semiconductor, Inc.  
Features  
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.  
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).  
2
MC44BC375/U/J/T Technical Data  
For More Information On This Product,  
Go to: www.freescale.com  
MOTOROLA  
Freescale Semiconductor, Inc.  
2 Device Overview  
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  
SPLLFLT  
LOP  
10  
8
3
MODULATOR  
SECTION  
Peak  
White Clip  
Clamp  
AUDIO  
TVOVCC  
TVOUT  
Video  
7
6
14  
Modulator  
31.25kHz  
Sound  
Oscillator  
and FM  
Sound  
PFD  
Audio  
Ampli  
LPF  
PREEM  
75  
Modulator  
13  
Prog.  
Divider  
LPF  
ALC  
PSS  
LPF  
VCCA  
GND  
11  
5
Power  
save  
Psave/  
LOP  
9
Sound  
Modulator  
SFS  
Test Mode  
Divider  
Snd Freq  
Select  
- SFS  
16  
1
VHF  
Divider  
VCO & PLL  
SECTION  
Channel  
Select  
CHS  
-
UHF  
OSC.  
PLL  
PS1/2  
Select  
- PSS  
31.25kHz  
Prog.  
Divider  
Phase  
Comp.  
Prescaler  
/ 8  
4Mhz  
XCO  
Ref Divider  
/128  
2
CHS  
4
XTAL  
12  
GND  
15  
PLLFLT  
Figure 2. MC44BC375/U/J/T Block Diagram  
MOTOROLA  
MC44BC375/U/J/T Technical Data  
For More Information On This Product,  
Go to: www.freescale.com  
3
Freescale Semiconductor, Inc.  
3 Maximum Ratings  
Maximum Ratings  
Sym  
Parameter  
Value Unit  
This device contains protection circuitry to guard  
against damage due to high static voltage or electric  
fields. However, precautions must be taken to avoid  
applications of any voltage higher than maximum rated  
voltages to this high impedance circuit. For proper  
operation, input and output voltages should be  
constrained to the ranges indicated in the  
Vcc  
Supply voltage  
6
V
o
Tamin Minimum operating ambient temperature  
Tamax Maximum operating ambient temperature  
Tstgmin Minimum storage temperature  
–20  
85  
C
C
C
C
o
o
o
–65  
150  
150  
Tstgmax Maximum storage temperature  
Recommended Operating Conditions.  
Tj  
Junction Temperature  
°C  
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  
Parameter  
Value  
Unit  
R
Thermal resistance from Junction to Ambient  
140  
°C/W  
thja  
5 Electrostatic Discharge  
Electrostatic Discharge (ESD) tests are done on all pins.  
Sym  
Parameter  
Min  
Typ  
Unit  
ESD  
ESD  
MM (Machine Model) - MIL STD 883C method 3015-7  
200  
500  
V
V
HBM (Human Body Model) - MIL STD 883C method 3015-7  
4000  
6000  
4
MC44BC375/U/J/T Technical Data  
MOTOROLA  
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 75load. SPECIFICATIONS ONLY VALID FOR ENVELOPE DEMODULATION  
Power Supply Parameters  
Min Typ Max Unit  
Notes  
Type  
Operating Supply Voltage range  
Total Supply Current  
4.5  
40  
3
5.0  
47  
5
5.5  
55  
7
V
B
A
A
mA All sections active  
mA PSave/LO=LO  
Total Standby Mode Supply Current  
DC Parameter  
Min Typ Max Unit  
Type  
Threshold voltage level on pins CHS, PSS, SFS, PSave/LO  
2.1  
10  
1
V
C
A
A
A
D
7
0.7  
60  
1
12  
µA  
µA  
µA  
K  
Sound Comparator Charge Pump Current: During locking  
When locked  
1.5  
RF Comparator Charge Pump Current  
100 150  
Crystal Oscillator Stability - negative resistance  
-
-
Logic Output Port: Saturation voltage @ I=15mA  
Leakage current  
-
-
210 300  
mV  
uA  
A
A
-
1
MOTOROLA  
MC44BC375/U/J/T Technical Data  
5
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)  
HI (Open or +5V)  
MC44BC375U  
MC44BC375J  
MC44BC375T  
CH4  
CH2  
CH13  
CH3  
CH1  
CH13  
1
CHS  
2
PSS  
MC44BC375U/J/T  
MC44BC375U/J/T  
MC44BC375U/J/T  
14dB  
16dB  
Power save Mode  
LOP pin LO (Low voltage)  
Normal Operation  
LOP pin HI (High impedance  
9
PSave/LO  
SFS  
16  
5.5Mhz  
4.5Mhz  
By default (open condition), all pins are “HI”.  
7.1 Test Modes  
Pin  
DC level  
Vcc + 0.3V  
Description  
Low frequency testing (RF frequency divided by 4 for MC44BC375U/J, and  
divided by 8 for MC44BC375T)  
CHS  
Vcc + 1.1V  
Vcc + 1Vbe  
Vcc + 1Vbe  
Base band test mode (DC drive applied to modulators)  
PSS  
SFS  
Transient Output Inhibit Disabled  
Sound Oscillator OFF  
Vcc + 0.3V  
Vcc + 1.1V  
Force UHF and Sound PLL Upper current source  
Force UHF and Sound PLL Lower current source  
VIDEO  
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 75load.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  
TV OUT output level  
Test Conditions  
Min Typ Max Unit Type  
74  
-
76  
79 dBµV  
B
C
C
C
Sound subcarrier Harmonics (fp+n*fs)  
Second Harmonic of chroma subcarrier.  
Ref Picture carrier  
Using red EBU bar  
-73  
-65  
-65  
-65  
-55  
-60  
dBc  
dBc  
dBc  
-
Chroma/Sound intermodulation: fp + (fsnd-fchr) Using red EBU bar  
-
2nd harmonic  
Fo (picture carrier) Harmonics (See Note1)  
3rd harmonic  
30  
66  
42 dBµV  
69 dBµV  
C
C
Out Band (picture carrier) Spurious  
In band spurious (Fo +/- 5 MHz range)  
4 MHz Crystal Spurious (Fo +/- 4 MHz)  
1/2*Fo - 1/4*Fo - 3/2*Fo - 3/4*Fo  
27 dBµV  
C
C
C
No video or sound modulation  
No video or sound modulation  
-70  
-82  
-62  
-75  
dBc  
dBc  
Note: 1: Picture carrier harmonics are highly dependant on PCB layout and decoupling capacitors.  
6
MC44BC375/U/J/T Technical Data  
For More Information On This Product,  
Go to: www.freescale.com  
MOTOROLA  
Freescale Semiconductor, Inc.  
Video Characteristics  
9 Video Characteristics  
Parameter  
Test Conditions  
Min  
Typ  
Max  
Unit Type  
Reference 0dB at 100kHz, measured at  
5MHz  
Video bandwidth  
-1.5  
-0.5  
dB  
C
Video input level  
75Ohm load  
0.2  
1.5  
1
Vcvbs  
µA  
D
A
A
Video input current  
Video input impedance  
500  
KΩ  
Unweighted  
Weighted  
49  
56  
52  
60  
dB  
dB  
C
C
Video S/N  
Differential Phase  
Differential Gain  
Luma/Sync ratio  
+/-1  
1
+/-5  
5
deg  
%
C
C
B
B
B
Input ratio 7.0:3.0  
6.8/3.2  
80  
7.2/2.8  
90  
%
Video modulation depth Video input level=1.0 V  
85  
95  
cbvs  
Peak White Clip  
Video Modulation Depth for Video=1.4 V  
90.5  
99.5  
%
cbvs  
10 Audio Characteristics  
All audio measurement use specified pre-emphasis circuit.  
Parameter  
Test Conditions  
Min Typ Max Unit Type  
PSS (Pin2) = HI  
PSS (Pin2) =LO  
14  
12  
16  
14  
18  
16  
dB  
dB  
Picture to Sound ratio  
B
B
Picture to Sound ratio  
difference  
between PSS = HI and PSS = LO  
1.5  
2.0  
2.5  
dB  
Using specific pre-emphasis circuit - Audio Input: 1Khz @ 205 mVrms  
Fs = 4.5 MHz  
(100% Modulation = +/- 25 kHz FM Deviation)  
Audio FM Modulation Depth  
75  
85  
95  
%
B
Fs = 5.5 MHz  
(100% Modulation = +/- 50 kHz FM Deviation)  
75  
45  
85  
55  
-
95  
61  
+2  
%
k  
dB  
B
A
C
Audio input resistance  
0dB ref @1kHz  
Measure from 50Hz to 15kHz  
Audio Frequency response  
-2.5  
Audio Distortion FM (THD  
only)  
At 1 kHz and 100% mod (+/- 50 kHz) - No Video  
-
0.3  
53  
1
-
%
C
C
Audio S/N with Sync Buzz FM  
50  
dB  
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.  
MOTOROLA  
MC44BC375/U/J/T Technical Data  
For More Information On This Product,  
Go to: www.freescale.com  
7
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.  
Video: 10 steps grey scale  
No audio  
Measurement used as a reference for other tests: TVout_Ref  
Sound Subcarrier Harmonics  
Measure in dBc second and third sound harmonics levels in reference to  
picture carrier (TVout_Ref).  
Picture carrier  
Sound carrier  
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  
frequency, resulting in the following spectrum.  
Video: a 700mVpk-pk 100Khz sinusoidal  
signal is inserted on the black level of  
active video area.  
Picture carrier  
Sound  
Chroma  
carrier  
carrier  
Frequency  
100Khz  
700mVpkpk  
Chroma 2nd  
Harmonic  
Fo  
+4.43Mhz +5.5Mhz  
+8.86Mhz  
Chroma/Sound intermodulation  
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.  
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.  
Intermodulation product is at the channel frequency +1,07Mhz.  
Picture carrier  
Sound  
Chroma  
carrier  
carrier  
Frequency  
4.43Mhz  
700mVpkpk  
Chroma/Sound  
Intermod.  
+1.07Mhz  
+4.43Mhz +5.5Mhz  
Fo  
Picture Carrier Harmonics  
8
MC44BC375/U/J/T Technical Data  
MOTOROLA  
For More Information On This Product,  
Go to: www.freescale.com  
Freescale SemiconCdhuarcacttoerriz,atIinoncM.easurement 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  
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  
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  
Video: 600mVpk-pk sinusoidal signal  
inserted on the black level of active video then swept from 100Khz to 5Mhz, and then the difference in dBc from the  
area.  
100Khz reference level is measured.  
Weighted Video Signal to Noise  
Video: 100% White video signal - 1Vpk-  
pk.  
No Audio signal  
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.  
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.  
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  
MOTOROLA  
MC44BC375/U/J/T Technical Data  
For More Information On This Product,  
Go to: www.freescale.com  
9
Freescale Semiconductor, Inc.  
Characterization Measurement Conditions  
Device and Signals Set-up  
Measurement Set-up  
Video: 5 step Grey Scale- 1Vpk-pk.  
No Audio signal  
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  
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.  
DIFF PHASE =  
* 100%  
the phase at position 0  
The video analyzer method takes the worst step from the first 4 steps.  
Video Differential Gain  
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.  
3
5
1
0
2
4
5-step Greyscale with Chroma subcarrier superimposed  
(not to scale), line CCIR 330.  
the largest positive or negative difference  
DIFF GAIN  
=
* 100%  
the amplitude at position 0  
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(  
m
V
)
No Audio signal  
Video: 10 step grey scale  
B(mV)  
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  
10  
MC44BC375/U/J/T Technical Data  
For More Information On This Product,  
Go to: www.freescale.com  
MOTOROLA  
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 &  
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.  
Schwarz AMFS Demodulator in B/G and This value is then converted in% of FM deviation, based on specified  
a HP8903A Audio Analyzer at 1kHz  
standards.  
Audio Frequency response  
The audio signal 1KHz 100mV  
is supplied by the Audio Analyzer,  
rms  
demodulated by the Demodulator and the audio analyzer measures the  
AC amplitude of this demodulated audio signal: this value is taken as a  
reference (0dB).  
The audio signal is then swept from 50Hz to 15KHz, and demodulated  
AC amplitude is measured in dB relative to the 1KHz reference.  
Audio pre-emphasis and de-emphasis circuits are engaged, all audio  
analyzer filters are switched OFF.  
Video Black Level  
Audio signal: 50Hz to 15KHz, 100mV  
This is measured using a Rohde &  
Schwarz AMFS Demodulator in B/G and  
a HP8903A.  
rms  
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  
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.  
Audio: 1Khz, adjustable level  
Video Black Level  
This is measured using a Rohde &  
Schwarz AMFS UHF Demodulator in B/G  
and a HP8903A Audio Analyzer at 1kHz.  
The output level of the Audio analyzer is  
varied to obtain a deviation of 50kHz  
indicated on the Demodulator.  
ADist = (Distorsion + Noise) ⁄ (Distorsion + Noise + Signal)  
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  
Audio Analyzer together with the internal 30+/-2kHz (60dB/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  
Video: EBU Color Bars  
This is measured using a Rohde &  
Schwarz AMFS Demodulator in B/G and  
a HP8903A Audio Analyzer at 1kHz. The  
output level of the Audio analyzer is  
varied to obtain a Modulation Deviation  
of 25kHz indicated on the AMFS  
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.  
MOTOROLA  
MC44BC375/U/J/T Technical Data  
For More Information On This Product,  
Go to: www.freescale.com  
11  
Freescale Semiconductor, Inc.  
Modulator Functionality  
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).  
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 1µA. 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 1V  
input level. It can be adjusted to any lower  
CBVS  
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 over-  
modulation 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.  
12  
MC44BC375/U/J/T Technical Data  
For More Information On This Product,  
Go to: www.freescale.com  
MOTOROLA  
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.  
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  
CH4 = 67.25Mhz  
CH1 = 91.25Mhz  
CH2 = 97.25Mhz  
MC44BC375U  
8
MC44BC375J  
MC44BC375T  
6
3
CH13 = 211.25Mhz  
12.9 Selectable Pins  
Pins CHS, PSS, SFS are internally pulled up to 5V.  
MOTOROLA  
MC44BC375/U/J/T Technical Data  
13  
For More Information On This Product,  
Go to: www.freescale.com  
Freescale Semiconductor, Inc.  
Pin Circuit Schematics  
13 Pin Circuit Schematics  
VCC  
100K  
CHS  
PSS  
SFS  
Psave  
VCC  
VCC  
5K  
LOP  
XTAL  
1.5K  
VCC  
VCC  
50k  
PREM  
10k  
audio  
11.8k  
AUDIO IN  
VCC  
VCC  
TV OUT  
VCC  
5K  
VCC  
SPLLFLT  
75  
TVOVCC  
VCC  
VCC  
VCC  
100  
PLLFLT  
2K  
VIDEO  
500  
10K  
10K  
Figure 3. Pin Schematics  
14  
MC44BC375/U/J/T Technical Data  
MOTOROLA  
For More Information On This Product,  
Go to: www.freescale.com  
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  
Loop Filter must  
be as close as  
CH 3/4  
Select  
O
PS1/2  
Select  
SFS  
Select  
O
O
47nF  
22nF  
10nF  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
2.2k  
LOP  
Vcc  
Cx***  
O
TVOUT  
4MHz  
Pre-em  
100nF  
1nF  
C1  
Vcc  
10nF  
1nF 220nF  
330nF  
75*  
Audio  
O
O
Psave/LO  
10k  
R2**  
R1**  
22nF  
Video  
*: This 75is to match with a 75video 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=1Kand R2=10Kreduce 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  
MOTOROLA  
MC44BC375/U/J/T Technical Data  
For More Information On This Product,  
Go to: www.freescale.com  
15  
Freescale Semiconductor, Inc.  
Markings and Case Diagrams  
15 Markings and Case Diagrams  
15.1 Pin Description  
N°  
Symbol  
CHS  
Pin description  
Channel Select  
Functionality  
Channel 3 / Channel 4 selection for MC44BC375U  
Channel 1 / Channel 2 selection for MC44BC375J  
Dont care for the MC44BC375T  
1
2
3
PSS  
LOP  
Picture to Sound Select  
Logic Output Port  
PS=14dB / PS=16dB selection  
Logic Output Level (Low voltage / high impedance)  
selectable via Pin 9  
4
5
6
7
8
XTAL  
Crystal  
Crystal Oscillator input  
Gnd  
Ground  
PREEM  
AUDIO  
SPLFLT  
Pre-emphasis  
Audio Input  
Sound PLL Filter  
Audio Pre-emphasis capacitor  
Normal Mode / Power save mode selection  
In Power Save Mode, the LOP pin is automatically  
switched to low voltage  
9
PSave/LO  
PowerSave & Logic Output control  
10  
11  
12  
13  
14  
15  
16  
VIDEO  
VCCA  
GND  
Video Input  
Voltage supply  
Ground  
TVOUT  
TVOVCC  
PLLFLT  
SFS  
TV Output  
Modulated signal Output  
Voltage supply  
PLL Filter  
UHF PLL Filter  
Sound Frequency Select  
Sound frequency 4.5Mhz / 5.5Mhz selection  
16  
MC44BC375/U/J/T Technical Data  
MOTOROLA  
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.  
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  
MC44BC375x  
chamfer and dimple areas.  
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)  
MOTOROLA  
MC44BC375/U/J/T Technical Data  
For More Information On This Product,  
Go to: www.freescale.com  
17  
Freescale Semiconductor, Inc.  
Markings and Case Diagrams  
Millimeters  
Inches  
Note: 1. Dimensions and Tolerances per ASME  
Y14.5M, 1994.  
Dim  
Min  
Max  
Min  
Max  
Note: 2. Controlling dimension: Millimeters.  
A
A1  
D
E
1.35  
0.1  
1.75  
0.25  
10  
0.054  
0.004  
0.385  
0.229  
0.150  
0.014  
0.008  
0.068  
0.009  
0.393  
0.244  
0.157  
0.019  
0.009  
Note: 3. Dimension D and E1 do not include mold  
protrusion.  
9.8  
Note: 4. Maximum mold protrusion 0.15 (0.006) per  
side.  
5.8  
6.2  
E1  
b
3.8  
4
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.  
0.35  
0.19  
0.49  
0.25  
c
e
1.27 BSC  
0.050 BSC  
L
0.4  
1.25  
0.5  
0.016  
0.010  
0.049  
0.019  
h
0.25  
o
o
o
o
Q
0
7
0
7
Figure 5. SO16NB Package  
18  
MC44BC375/U/J/T Technical Data  
For More Information On This Product,  
Go to: www.freescale.com  
MOTOROLA  
Freescale Semiconductor, Inc.  
Markings and Case Diagrams  
MOTOROLA  
MC44BC375/U/J/T Technical Data  
For More Information On This Product,  
Go to: www.freescale.com  
19  
Freescale Semiconductor, Inc.  
HOW TO REACH US:  
Information in this document is provided solely to enable system and software implementers to  
use Motorola products. There are no express or implied copyright licenses granted hereunder to  
design or fabricate any integrated circuits or integrated circuits based on the information in this  
document.  
USA/EUROPE/LOCATIONS NOT LISTED:  
Motorola Literature Distribution;  
P.O. Box 5405, Denver, Colorado 80217  
1-303-675-2140 or 1-800-441-2447  
Motorola reserves the right to make changes without further notice to any products herein.  
Motorola makes no warranty, representation or guarantee regarding the suitability of its products  
for any particular purpose, nor does Motorola assume any liability arising out of the application or  
use of any product or circuit, and specifically disclaims any and all liability, including without  
limitation consequential or incidental damages. Typicalparameters which may be provided in  
Motorola data sheets and/or specifications can and do vary in different applications and actual  
performance may vary over time. All operating parameters, including Typicalsmust be validated  
for each customer application by customers technical experts. Motorola does not convey any  
license under its patent rights nor the rights of others. Motorola products are not designed,  
intended, or authorized for use as components in systems intended for surgical implant into the  
body, or other applications intended to support or sustain life, or for any other application in which  
the failure of the Motorola product could create a situation where personal injury or death may  
occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized  
application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries,  
affiliates, and distributors harmless against all claims, costs, damages, and expenses, and  
reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death  
associated with such unintended or unauthorized use, even if such claim alleges that Motorola  
was negligent regarding the design or manufacture of the part.  
JAPAN:  
Motorola Japan Ltd.; SPS, Technical Information Center,  
3-20-1, Minami-Azabu Minato-ku, Tokyo 106-8573 Japan  
81-3-3440-3569  
ASIA/PACIFIC:  
Motorola Semiconductors H.K. Ltd.; Silicon Harbour  
Centre, 2 Dai King Street, Tai Po Industrial Estate,  
Tai Po, N.T., Hong Kong  
852-26668334  
TECHNICAL INFORMATION CENTER:  
1-800-521-6274  
HOME PAGE:  
http://www.motorola.com/semiconductors  
Motorola and the Stylized M Logo are registered in the U.S. Patent and Trademark Office. All other  
product or service names are the property of their respective owners. Motorola, Inc. is an Equal  
Opportunity/Affirmative Action Employer.  
© Motorola, Inc. 2002  
MC44BC375/D  
For More Information On This Product,  
Go to: www.freescale.com  

相关型号:

MC44BC375TD

PLL Tuned VHF Audio/ Video High Integration Modulator ICs
MOTOROLA

MC44BC375TD

PLL Tuned VHF Audio/Video High Integration Modulator ICs
FREESCALE

MC44BC375TD

IC,TV/VIDEO CIRCUIT,VIDEO ENCODER,BICMOS,SOP,16PIN,PLASTIC
NXP

MC44BC375TDR2

IC,TV/VIDEO CIRCUIT,VIDEO ENCODER,BICMOS,SOP,16PIN,PLASTIC
NXP

MC44BC375U

PLL Tuned VHF Audio/ Video High Integration Modulator ICs
MOTOROLA

MC44BC375U

PLL Tuned VHF Audio/Video High Integration Modulator ICs
FREESCALE

MC44BC375UA

PLL Tuned VHF Audio/Video High Integration IC
FREESCALE

MC44BC375UAD

PLL Tuned VHF Audio/Video High Integration IC
FREESCALE

MC44BC375UAD

SPECIALTY CONSUMER CIRCUIT, PDSO16, SO-16
MOTOROLA

MC44BC375UADR2

SPECIALTY CONSUMER CIRCUIT, PDSO16, SO-16
MOTOROLA

MC44BC375UADR2

SPECIALTY CONSUMER CIRCUIT, PDSO16, 1.27 MM PITCH, MS-012AC, SOIC-16
NXP

MC44BC375UAEF

SPECIALTY CONSUMER CIRCUIT, PDSO16, 1.27 MM PITCH, ROHS COMPLIANT, MS-012AC, SOIC-16
NXP