MC44BC374T1D [MOTOROLA]

PLL Tuned PAL/NTSC UHF and VHF Audio/ Video High Integration Modulator IC; PLL调谐PAL / NTSC超高频和甚高频音频/视频高集成调制器IC
MC44BC374T1D
型号: MC44BC374T1D
厂家: MOTOROLA    MOTOROLA
描述:

PLL Tuned PAL/NTSC UHF and VHF Audio/ Video High Integration Modulator IC
PLL调谐PAL / NTSC超高频和甚高频音频/视频高集成调制器IC

消费电路 商用集成电路
文件: 总27页 (文件大小:311K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
Technical Data  
MC44BC374T1/D  
Rev. 1.2 07/2002  
MC44BC374T1  
MC44BC374T1  
PLL Tuned PAL/NTSC  
UHF and VHF Audio/  
Video High Integration  
Modulator IC  
SO16NB Package  
Ordering Information  
Device  
Temp Range  
Package  
MC44BC374T1D, 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.  
Figure 1 shows the pin connections.  
1
2
3
4
5
6
Features . . . . . . . . . . . . . 1  
Device Overview . . . . . . 3  
Maximum Ratings . . . . . 4  
Thermal Rating . . . . . . . 4  
Electrostatic Discharge 4  
Electrical Characteristics  
5
7
8
9
I2C Bit Mapping . . . . . . . 5  
I2C Programming . . . . . 6  
Modulator High  
Frequency  
Characteristics  
GNDD  
SCL  
SDA  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
8
VCCD  
10 Video Characteristics . . 9  
11 Audio Characteristics . 10  
12 Characterization  
Measurement  
PLLFLT  
STBY  
XTAL  
TVOVCC  
TVOUT  
GND  
GND  
Conditions  
11  
13 Modulator Operation . 16  
14 High Speed I2C  
PREEM  
AUDIO  
VCCA  
Compatible Bus  
19  
VIDEO  
15 Pin Circuit  
Schematics  
SPLFLT  
22  
16 Application and Case  
Diagrams . . . . . . . . . . . 23  
Figure 1. 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.  
 
Features  
1 Features  
2
The channel is set by an on-chip high-speed I C compatible bus receiver. A Phase-Locked Loop (PLL)  
tunes the modulator over the full UHF range. The modulator incorporates a sound subcarrier oscillator  
and uses a second PLL to derive 4.5, 5.5, 6.0, and 6.5MHz subcarrier frequencies. These frequencies are  
selectable using the bus.  
The modulation standard is set to System B/G.  
The picture-to-sound ratio is adjusted using the bus. In addition, an on-chip video test pattern generator can  
be turned ON with a 1KHz audio test signal.  
Compared with the MC44BC374C, this modulator has one IIC programming difference, a hardware  
standby mode in addition to the software standby mode, and no logic output port.  
Compared with the MC44BC374T, this modulator has a different start-up channel.  
The MC44BC374T1 also has the following features:  
No external varicaps diodes/inductor or tuned components  
Channel 21-69 UHF operation  
VHF range possible by internal dividers (30MHz–450MHz)  
Integrated on-chip programmable UHF oscillator  
Extremely low external components count  
2
High speed I C-bus compatible (800kHz)  
Fixed video modulation depth (80%)  
Peak White Clip disabled via the bus  
Programmable picture/sound carrier ratio (12dB and 16dB)  
Integrated on-chip programmable sound subcarrier oscillator  
(4.5MHz to 6.5MHz)—No external varicaps  
On-chip video test pattern generator with sound test signal (1kHz)  
2
Low-power modulator standby mode programmable by I C bus or  
switchable by STBY pin voltage  
Transient output inhibit during PLL Lock-up at power-ON  
Start-up on channel ‘71’ (871.25 MHz)  
Extremely robust ESD protection, minimum 4kV, typical 6kV  
2
MC44BC374T1 Technical Data  
MOTOROLA  
Device Overview  
2 Device Overview  
Figure 2 shows a simplified block diagram of the MC44BC374T1device.  
The MC44BC374T1 device has three main sections:  
2
1. A high speed I C-compatible bus section  
2. A PLL section to synthesize the UHF/VHF output channel frequency (from an integrated  
UHF oscillator, divided for VHF output)  
3. A modulator section, which accepts audio and video inputs, then uses them to modulates  
the UHF/VHF carrier  
An on-chip video test pattern generator with an audio test signal is included. The MC44BC374T1 is  
designed to operate as a B/G standard modulator. High frequency BiCMOS technology allows integration  
of the UHF tank circuit and certain filtering functions.  
STBY  
3
VIDEO  
9
SPLLFLT  
8
MODULATOR  
SECTION  
Peak  
White  
Clip  
2
Clamp  
I C BUS  
31.25  
kHz  
Video  
Modulator  
AUDIO  
7
Sound  
Oscillator  
and FM  
Audio  
Amplifier  
Sound  
PFD  
6
PREEM  
TVOVCC  
13  
LPF  
75  
Modulator  
12  
Prog  
Divider  
LPF  
ALC  
TVOUT  
LPF  
10 VCCA  
FM  
11  
5
GND  
GND  
Sound  
Modulator  
BUS SECTION  
VCO and PLL SECTION  
VHF Dividers  
UHF OSC  
PLL  
High Speed  
SCL  
SDA  
1
2
2
I C Bus  
Prescaler/8  
Receiver  
Prog  
Divider  
4MHz  
XCO  
Phase  
Comp  
Ref Divider  
/128  
2
I C BUS  
31.25KHz  
4
14  
15  
16  
VCCD GNDD  
PLLFLT  
XTAL  
Figure 2. MC44BC374T1 Simplified Block Diagram  
MOTOROLA  
MC44BC374T1 Technical Data  
3
 
Maximum Ratings  
3 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
MC44BC374T1 Technical Data  
MOTOROLA  
Electrical Characteristics  
6 Electrical Characteristics  
A = 100% Tested  
B = 100% Correlation tested  
C = Characterized on samples  
D = Design parameter  
6.1 Specification Conditions  
o
Unless otherwise stated: V =5.0V, Ambient Temperture=25 C, Video Input 1V , 10-step grayscale.  
cc  
p-p  
RF output into 75Ohm load. SPECIFICATIONS ONLY VALID FOR ENVELOPE DEMODULATION.  
Parameter  
Min Typ Max Unit  
Notes  
Type  
Operating supply voltage range  
Total supply current  
4.5  
44  
3
5.0  
52  
6
5.5  
60  
9
V
B
A
A
B
mA  
mA  
µS  
All sections active  
Bus Section active  
Total standby mode supply current  
Test pattern sync pulse width  
3
4.7  
6.5  
Sound comparator charge pump current  
During locking  
7
0.7  
10  
1
12  
1.5  
µA  
µA  
A
A
When locked  
RF comparator charge pump current  
60  
1
100  
150  
µA  
A
D
Crystal oscillator stability—negative resistance  
KΩ  
STBY pin DC current  
Force 5V to STBY pin  
Force 0V to STBY pin  
1
-10  
µA  
µA  
A
A
2
7 I C Bit Mapping  
WRITE MODE  
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
ACK  
CA—CHIP ADDRESS  
C1—High Order Bits  
C0—Low Order Bits  
FM—High Order Bits  
FL—Low Order Bits  
1
1
1
0
0
0
0
1
0
1
0
ACK  
ACK  
ACK  
ACK  
ACK  
SO  
ATT  
N11  
N3  
PS  
X3  
0
X2  
X5  
N7  
X1  
0
PWC  
0
OSC  
TPEN  
N4  
SFD1 SFD0  
X4  
N6  
X0  
N10  
N2  
N9  
N1  
N8  
N0  
N5  
Bit Name  
Description  
PWC  
OSC  
ATT  
Peak White Clip enable/disable  
UHF oscillator ON/OFF  
Modulator output attenuated—sound and video modulators ON/OFF  
Sound subcarrier frequency control bits  
Sound Oscillator ON/OFF  
SFD0, 1  
SO  
PS  
Picture-to-sound carrier ratio  
TPEN  
Test pattern enable—picture and sound  
Test mode bits—All bits are 0 for normal operation (see Test Mode tables, page 6 & page 7)  
except “OSC” bit (normal mode is “1”)  
X5…X0  
N0…N11  
UHF frequency programming bits, in steps of 250kHz  
MOTOROLA  
MC44BC374T1 Technical Data  
5
I2C Programming  
2
8 I C Programming  
Sound  
UHF  
SFD1 SFD0  
Sound Subcarrier Freq (MHz)  
0
0
1
1
0
1
0
1
4.5  
5.5  
6.0  
6.5  
OSC  
UHF Oscillator  
Normal operation  
1
0
UHF oscillator disabled (oscillator and PLL  
sections bias turned OFF)  
ATT  
Modular Output Attenuation  
PS  
Picture-to-Sound Ratio (dB)  
0
12  
0
Normal operation  
1
16  
Modulator output attenuation (sound and  
video modulators sections bias turned OFF.  
1
SO  
Sound Oscillator  
0
Sound oscillator ON (Normal mode)  
Video  
1
Sound oscillation disabled (oscillator and PLL  
PWC  
0
Peak White Clip  
Peak White Clip ON  
Standby Mode  
1
Peak White Clip OFF  
OSC SO ATT  
Combination of 3-bits  
TPEN  
0
Test Pattern Signal  
Test pattern signal OFF (normal operation)  
0
1
1
Modulator standby mode.  
1
Test pattern signal ON (picture and sound)  
WRITE MODE: Test Mode 1 and VHF Range  
X2  
X1  
X0  
State  
Description  
0
0
0
0
1
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
1.a  
1.b  
1.c  
1.d  
1.e  
1.f  
Normal operation  
RF frequency divided for low frequency testing or VHF range: RF/2  
RF/4  
RF/8  
RF/16  
DC drive applied to modulators: Non-inverted video at TVOUT  
DC drive applied to modulators: Inverted video at TVOUT  
1.g  
Transient output inhibit disabled  
1
1
1
1.h  
During this speed-up test mode, ATT=0 forces sound current source to 1µA, and  
ATT=1 forces it to 10µA.  
6
MC44BC374T1 Technical Data  
MOTOROLA  
I2C Programming  
WRITE MODE: Test Mode 2  
X5  
X4  
X3  
State  
Description  
0
0
0
0
0
1
2.a  
2.b  
Normal operation  
Test pattern generator DC verification (Test pattern DC test mode available)  
Programmable divider test  
(UHF prog. div. on PLLFILT and sound prog. div. on SPLLFIL pin)  
0
0
1
1
0
1
2.c  
2.d  
Reference divider test (UHF reference divider on PLLFILT pin)  
UHF phase comparator, upper source on PLLFILT pin  
Sound phase comparator 10µA upper source on SPLLFIL  
(Only valid during transient output inhibit)  
1
1
0
0
0
1
2.e  
2.f  
UHF phase comparator, lower source on PLLFILT pin  
Sound phase comparator 10µA lower source on SPLLFIL  
(Only valid during transient output inhibit)  
Sound phase comparator 1µA upper source on SPLLFIL  
1
1
1
1
0
1
2.g  
2.h  
(Not valid during transient output inhibit)  
Sound phase comparator 1µA lower source on SPLLFIL  
(Not valid during transient output inhibit)  
NOTE:  
Test modes 1 and 2 are intended for manufacturing test purpose only and  
cannot be used for normal application, except for VHF range (states 1.b to  
1.e)  
MOTOROLA  
MC44BC374T1 Technical Data  
7
Modulator High Frequency Characteristics  
9 Modulator High Frequency Characteristics  
o
Unless otherwise stated: V =5.0V, Ambient Temperture=25 C, Video Input 1V , 10-step grayscale.  
cc  
p-p  
RF inputs/outputs into 75Ohm load. SPECIFICATIONS ONLY VALID FOR ENVELOPE  
DEMODULATION.  
Parameter  
TVOUT output level  
Test Conditions  
Min Typ Max Unit Type  
Output signal from modulator section  
See Figure 3. See Note 2  
73  
74.5  
77 dBµV  
B
UHF oscillator frequency  
VHF range  
460  
45  
880 MHz  
460 MHz  
A
B
From UHF oscillator internally divided  
During transient output inhibit, or when  
ATT bit is set to 1. See Figure 3.  
See Note 2  
TVOUT output attenuation  
50  
60  
dBc  
B
Sound subcarrier harmonics (Fp+nFs) Reference picture carrier. See Note 2  
63  
58  
65  
dBc  
dBc  
C
C
Second harmonic of chroma subcarrier Using red EBU bar. See Note 2  
Chroma/Sound intermodulation:  
Using red EBU bar.See Note 2  
Fp+ (Fsnd – Fchr)  
65  
dBc  
C
2nd harmonic: CH21  
3rd harmonic: CH21  
Other channels: See Figure 3.  
35  
26  
30  
22  
Fo (picture carrier) harmonics  
dBc  
C
See NOTE 1. See Note 2  
1/2Fo–1/4Fo–3/2Fo–3/4Fo  
Out band (picture carrier) spurious  
0
10 dBµV  
60 dBc  
C
C
From 40MHz to 1GHz. See Note 2  
In band spurious (Fo 5MHz)  
No video sound modulation.See Note 2  
Note: 1: Picture carrier harmonics are highly dependant on PCB layout and decoupling capacitors.  
Note: 2: See “Characterization Measurement Conditions” on page 11.  
2Fo Harm onics  
3Fo Harm onics  
45  
40  
35  
30  
25  
20  
15  
40  
35  
30  
25  
20  
15  
Typical  
Typical  
Minimum specification  
Minimum specification  
471 521 571 621 671 721 771 821 871  
471 521 571 621 671 721 771 821 871  
Frequency (M hz)  
Frequency (M hz)  
TV Output Level  
TV Outpu t Atte n uatio n  
78  
75  
70  
65  
60  
55  
50  
45  
77  
76  
75  
74  
73  
72  
Maximum specification  
Typical  
Typical  
Minimum specification  
Minimum specification  
471 521 571 621 671 721 771 821 871  
471 521 571 621 671 721 771 821 871  
Fre qu e ncy (M hz )  
Frequency (Mhz)  
Figure 3. Typical Performance  
MC44BC374T1 Technical Data  
8
MOTOROLA  
 
Video Characteristics  
10 Video Characteristics  
o
Unless otherwise stated: V =5.0V, Ambient Temperture=25 C, Video Input 1V , 10-step grayscale. RF  
cc  
p-p  
inputs/outputs into 75Ohm load. SPECIFICATIONS ONLY VALID FOR ENVELOPE  
DEMODULATION.  
Parameter  
Video bandwidth  
Test Conditions  
Min  
Typ  
Max  
Unit Type  
Reference 0dB at 100kHz,  
measured at 5MHz. See Note 2  
–1.5  
–0.8  
dB  
C
Video input level  
75Ohm load  
0.2  
1.5  
1
Vcvbs  
µA  
KΩ  
D
A
A
Video input current  
Video input impedance  
500  
PWC bit set to 1, see PWC section.  
See Note 2  
Peak White Clip  
110  
114  
118  
%
A
No sound modulation,100% white video  
Using CCIR Rec.567 weighting filter  
See Figure 4. See Note 2  
Video S/N  
50  
45  
–5  
53  
5
dB  
C
C
C
Unweighted. See Note 2  
CCIR Test Line 330, worst case from the  
first 4 steps out of 5. See Note 2  
Differential Phase  
Differential Gain  
deg  
%
CCIR Test Line 310, worst case from the  
first 4 steps out of 5. See Note 2  
–5  
5
C
6.8/  
3.2  
7.2/  
2.8  
Luma/Sync ratio  
Input ratio 7.0:3.0  
%
B
B
Video modulation depth  
See Figure 4.See Note 2  
75  
81  
88  
PAL Video M odulation Depth  
Video Signal to Noise  
90  
88  
86  
84  
82  
80  
78  
76  
74  
58  
56  
54  
52  
50  
48  
Maximum specification  
Typical  
Typical  
Minimum specification  
Minimum specification  
471 521 571 621 671 721 771 821 871  
471 521 571 621 671 721 771 821 871  
Frequency (Mhz)  
Frequency (M hz)  
Figure 4. Typical performances  
MOTOROLA  
MC44BC374T1 Technical Data  
9
 
Audio Characteristics  
11 Audio Characteristics  
o
Unless otherwise stated: V =5.0V, Ambient Temperture=25 C, Video Input 1V , 10-step grayscale.  
cc  
p-p  
RF output into 75Ohm load. SPECIFICATIONS ONLY VALID FOR ENVELOPE DEMODULATION.  
Parameter  
Test Conditions  
PS bit set to 0  
Min  
Typ  
Max  
Unit Type  
13  
9
16  
12  
19  
15  
Picture-to-Sound ratio  
dB  
%
B
PS bit set to 1  
Using specific pre-emphasis circuit,  
audio input level=205mVrms–audio frequency=1kHz  
FM modulation: Fs=5.5, 6 or 6.5MHz  
100% modulation= 50kHz FM deviation  
Audio modulation depth  
80  
B
FM modulation: NTSC Fs=4.5MHz  
100% modulation= 25kHz FM deviation  
80  
53  
%
B
A
Audio input resistance  
45  
61  
KΩ  
Reference 0dB at 1kHz,  
Audio Frequency response  
using specified pre-emphasis circuit,  
measure from 50Hz to 15kHz  
2.5  
+2  
dB  
C
at 1kHz, 100% modulation ( 50kHz)  
No video  
Audio Distortion FM (THD only)  
Audio S/N with Sync Buzz FM  
0.4  
53  
2
%
C
C
See Figure 4  
48  
dB  
Audio Signal to Noise  
58  
56  
Typical  
54  
52  
50  
48  
Minimum specification  
46  
471 521 571 621 671 721 771 821 871  
Frequency (Mhz)  
Figure 5. Typical performances  
10  
MC44BC374T1 Technical Data  
MOTOROLA  
Characterization Measurement Conditions  
12 Characterization Measurement Conditions  
Device default configuration unless otherwise specified:  
Peak White Clip enable  
UHF oscillator ON  
Sound and video modulators ON  
Sound subcarrier frequency = 5.5Mhz  
Sound Oscillator ON  
Picture-to-sound carrier ratio = 12dB  
Test pattern disabled  
All test mode bits are ‘0’  
Frequency from channel 21 to 69  
RF Inputs / Output into 75ohm Load using a 75 to 50 ohm transformation. Video Input 1V pk-pk. Audio  
pre-emphasis circuit engaged.  
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  
TVOUT output attenuation  
“ATT” bit = 1  
No Video signal  
No Audio signal  
Measure in dBc picture carrier at “ATT”=”1” with reference to picture  
carrier at “ATT”=”0”.  
Sound Subcarrier Harmonics  
Measure in dBc second and third sound harmonics levels in reference to  
picture carrier (TVout_Ref).  
Picture carrier  
Sound carrier  
Sound  
2nd harm  
Video: 10 steps grey scale  
No Audio signal  
Sound  
3rd harm  
Fo  
+5.5Mhz +11Mhz +16.5Mhz  
MOTOROLA  
MC44BC374T1 Technical Data  
11  
Characterization Measurement Conditions  
Device and Signals Set-up  
Measurement Set-up  
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  
frequency, resulting in the following spectrum  
No audio  
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  
Chroma 2nd  
Harmonic  
700mVpkpk  
Fo  
+4.43Mhz +5.5Mhz  
+8.86Mhz  
Chroma/Sound intermodulation  
No audio signal  
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.  
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  
Measure in dBc, in reference to picture carrier (TVout_Ref), second and  
third harmonic of channel frequency, resulting in the following spectrum.  
Picture carrier  
3rd harmonic  
2nd harmonic  
No Video signal  
No Audio signal  
Fo  
2Fo  
3Fo  
12  
MC44BC374T1 Technical Data  
MOTOROLA  
Characterization Measurement Conditions  
Measurement Set-up  
Device and Signals Set-up  
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  
No Video signal  
No Audio signal  
Measure in dBc, in reference to picture carrier (TVout_Ref), spurious  
levels falling into video bandwidth Fo+/-5Mhz.  
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.  
Peak White Clip  
The video modulation depth is measured for 1.0VCVBS input level,  
giving modulation depth MDA. Then the same measurement is carried  
out for an input level of 1.4VCVBC, giving modulation depth MDB.  
The Peak White Clip is defined as 100*MDB/MDA.  
No Audio signal.  
Video: 10 step grey scale  
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 UHF 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  
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.  
Video: 5 step Grey Scale- 1Vpk-pk.  
No Audio signal  
This is measured using a Rohde &  
Schwarz AMFS UHF 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 largest positive or negative difference  
DIFF PHASE =  
* 100%  
the phaseat position 0  
The video analyzer method takes the worst step from the first 4 steps.  
MOTOROLA  
MC44BC374T1 Technical Data  
13  
Characterization Measurement Conditions  
Device and Signals Set-up  
Measurement Set-up  
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 UHF 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.  
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  
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.  
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  
14  
MC44BC374T1 Technical Data  
MOTOROLA  
Characterization Measurement Conditions  
Measurement Set-up  
Device and Signals Set-up  
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)  
MOTOROLA  
MC44BC374T1 Technical Data  
15  
Modulator Operation  
13 Modulator Operation  
13.1 Power ON Settings  
At power-ON, the MC44BC374T1 configuration is as follows:  
WRITE MODE  
C1High Order Bits  
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
ACK  
1
0
0
1
0
0
0
0
0
1
0
0
0
0
0
0
ACK  
ACK  
ACK  
ACK  
C0Low Order Bits  
FMHigh Order Bits  
FLLow Order Bits  
0
0
N11  
N3  
N10  
N2  
N9  
N1  
N8  
N0  
N7  
0
N6  
0
N5  
N4  
Note: N0 to N11 are set to have UHF oscillator on channel 71 (871.25MHz).  
Note: Peak White Clip is ON.  
Note: Sound frequency is 5.5MHz.  
Note: Picture to sound ratio is 12dB.  
NOTE:  
This power-ON configuration is not available when modulator is switched  
ON from STBY pin.  
13.2 Power Supply  
The three device Vccs (pins 10, 13, 15) 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 (except STBY pin  
during hardware standby mode).  
13.3 Standby modes  
During standby mode, the modulator is switched to low power consumption: the sound oscillator, UHF  
oscillator, video and sound modulator sections bias are internally turned OFF.  
The IIC bus section remains active.  
Modulator can be switched in standby mode in 2 cases:  
Software standby mode: combination of 3 bits of IIC message:OSC=0, SO=1 and ATT=1  
Hardware standby mode: STBY pin is set to LO state  
Hardware / Software standby modes  
There is an internal logical “OR” function between the hardware and software standby modes:  
Hardware standby mode  
Software standby mode  
Modulator Mode  
Normal  
Normal  
Normal  
Normal  
Standby  
Standby  
Standby  
Normal  
Standby  
Standby  
Standby  
Standby  
NOTE:  
When switching from STBY=LO to STBY=HI, the modulator  
configuration is not guaranteed. An IIC message has to be sent to program  
the modulator.  
16  
MC44BC374T1 Technical Data  
MOTOROLA  
Modulator Operation  
13.3.1 STBY Pin Levels  
Modulator Mode  
STBY pin state  
Normal  
Standby  
HI  
LO  
+5V or  
high impedance  
STBY pin level  
0V  
A pull down resistor may be used on STBY pin in order to force an “high impedance” condition into a LO  
state (i.e. standby mode condition).  
13.4 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 for each of the following three cases:  
Power-ON from zero (i.e., all Vcc is switched from 0V to 5V).  
UHF oscillator power-ON from OFF state (i.e., OSC bit is switched from 0 to 1)  
STBY pin switched from LO state to HI state  
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 using Test Mode1–State1.h.  
13.5 Video Section — Peak White Clip  
The modulator requires:  
A composite video input with negative going sync pulses  
A nominal level of 1Vp-p  
This signal is AC-coupled to the video input where the sync tip level is clamped.  
The video signal is then passed to a Peak White Clip circuit. The PWC circuit function is to soft-clip the  
top of the video waveform if the “sync tip amplitude” to “peak white clip” goes too high. This method  
avoids carrier over-modulation by the video.  
Clipping can be disabled by software.  
13.6 Sound Section  
The multivibrator oscillator is fully integrated and does not require any external components. An internal  
low-pass filter and matched structure give a 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 both types of modulator.  
The audio pre-emphasis circuit is a high-pass filter with an external capacitor and an internal resistor  
(100kOhms). The recommended capacitor value (470pF) is for BG standard; time constant is 50µs.  
MOTOROLA  
MC44BC374T1 Technical Data  
17  
Modulator Operation  
13.7 Test Pattern Generator  
The IC generates a simple test pattern, which can be switched under bus control to permit a TV receiver to  
easily tune to the modulator output. The pattern consists of two white vertical bars on a black background  
and a 976Hz audio test signal.  
TE2  
7/10  
3/10  
TE1  
10  
20 24 2830  
40 44  
50  
60 64  
0
TIME IN µS.  
13.8 PLL Section  
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 programmable divider division-ratio is controlled by the state of control bits N0 to N11.  
The divider-ratio N for a desired frequency F (in MHz) is given by:  
F
8
128  
4
--- --------  
N =  
×
with:  
N = 2048 × N11 + 1024 × N10 + …… + 4 × N2 + 2 × N1 + N0  
13.9 UHF Oscillator — VHF range  
The UHF oscillator is fully integrated and does not require any external components.  
For low frequency testing or VHF range operation (test mode 1, states 1.b to 1.c), the UHF oscillator can  
be internally divided by: 2, 4, 8, or 16.  
13.10 Differences From MC44BC374C device  
“OSC” bit programming is inverted  
Start up channel is ‘71’ instead od ‘36’  
Hardware standby mode is added  
Logic Output Port is not available  
“TB1” bit is not available (limited software compatibility with the MC44355 device)  
Read Mode is not available  
18  
MC44BC374T1 Technical Data  
MOTOROLA  
High Speed I2C Compatible Bus  
2
14 High Speed I C Compatible Bus  
14.1 Specification Conditions  
o
Unless otherwise specified, Vcc1=5.0V, TA=25 C.  
Electrical Characteristics  
Min Typ  
Max  
Unit Type  
SDA / SCL output current at 0V  
SDA / SCL low input level  
3.0  
5  
0
0,3  
10  
1.5  
µA  
V
A
B
B
C
D
C
A
C
SDA / SCL high input level  
V
SDA/SCL input current for input level from 0.4V to 0.3Vcc  
SDA/SCL input level  
5
µA  
V
Vcc+0,3  
10  
SDA/SCL capacitance  
pF  
V
ACK low output level (sinking 3mA)  
ACK low output level (sinking 15mA)  
1
1.5  
V
Timing Characteristics  
Min Typ  
Max  
Unit Type  
Bus clock frequency  
0
800  
kHz  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
C
C
C
C
C
C
C
C
C
C
C
Bus free time between stop and start  
Setup time for start condition  
Hold time for start condition  
Data setup time  
200  
500  
500  
0
Data hold time  
0
Setup time for stop condition  
Hold time for stop condition  
Acknowledge propagation delay  
SDA fall time at 3ma sink I and 130pF load  
SDA fall time at 3ma sink I and 400pF load  
500  
500  
300  
50  
80  
SDA rise time  
SCL fall/rise time  
300  
300  
ns  
ns  
C
C
Pulse width of spikes suppressed by the input filter  
50  
ns  
C
14.2 Timings Definition  
Tbuf  
Stop  
Start  
ACK  
Stop  
SDA  
SCL  
Start  
Chip Address  
SSDA  
SSCL  
...  
...  
SDA  
SCL  
Tsu;sto Thd;sta  
Tsu;dat Thd;dat  
Tack:low  
Tsu;sta  
Thd;sto  
14.3 Levels Definition  
Vcc  
Vih  
dead band  
SDA  
...  
Vil  
0V  
MOTOROLA  
MC44BC374T1 Technical Data  
19  
High Speed I2C Compatible Bus  
2
14.4 High Speed I C Compatible Bus Format  
SCL  
1
2
3
4
5
6
7
8
9
10 11 12 13 14  
16 17  
18 19  
15  
44 45  
Stop  
STA  
Chip Address ($CA)  
First Data Byte (C1 or FM)  
Data  
ACK  
ACK  
ACK  
SDA  
2
14.5 I C Write Mode Format and Bus Receiver  
2
2
The bus receiver operates the I C compatible data format. The chip address (I C bus) is:  
1 1 0 0 1 0 1 0 (ACK) = $CA (hex) in write mode  
In write mode, each ninth data bit (bits 9, 18, 27, 36, and 45) is an acknowledge bit (ACK) during which  
the MCU sends a logic 1 and the Modulator circuit answers on the data line by pulling it low. Besides the  
chip address, the circuit needs two (2) or four (4) data bytes for operation. The following sequences of data  
bytes are the permitted incoming information:  
Example 1  
Example 2  
Example 3  
Example 4  
STA  
STA  
STA  
STA  
CA  
CA  
CA  
CA  
C1  
FM  
C1  
FM  
C0  
FL  
C0  
FL  
STO  
STO  
FM  
FL  
C0  
STO  
STO  
C1  
With:  
STA = Start condition  
CA = Chip Address  
FM = Frequency information, high order bits  
C1 = Control information, high order bits  
STO = Stop condition  
FL = Frequency information, low order bits  
CO = Control information, low order bits  
After the chip address, two or four data bytes may be received.  
If three data bytes are received, the third one is ignored.  
If five or more data bytes are received, the fifth and following ones are ignored, and the last ACK  
pulse is sent at the end of the fourth data byte.  
The first and third data bytes contain a function bit, which lets the IC distinguish between frequency  
information and control information. If the function bit is a logic 1, the two following bytes contain control  
information. The first data byte after the chip address, may be byte CO or byte FM. The two bytes of  
frequency information are preceded by a logic 0.  
20  
MC44BC374T1 Technical Data  
MOTOROLA  
Pin Circuit Schematics  
15 Pin Circuit Schematics  
VCCD  
VCC  
VCCD  
VCC  
50  
25K  
SDA  
25K  
1/2 VCCD  
SCL  
1/2 VCCD  
ACK  
VCC  
VCC  
5K  
STBY  
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 6. Pin Schematics  
MOTOROLA  
MC44BC374T1 Technical Data  
21  
Application and Case Diagrams  
16 Application and Case Diagrams  
16.1 Proposed BiCMOS Modulator Application  
This document contains information on a new product under development. Motorola reserves the right to change  
or discontinue this product without notice.  
Vcc  
SDA SCL  
O
O
O
2.2k  
Note 2  
22nF  
16  
Note 3  
220K  
1
SCL  
GNDD  
15  
2
SDA  
VCCD  
3
14  
Hi/Lo  
STBY  
PLLFLT  
47nF  
O TVOUT  
Cx  
Note 1  
4
13  
4MHz  
XTAL  
TVOVCC  
10nF  
5
12  
GND  
TVOUT  
1nF  
Pre-em  
6
11  
PREEM  
GND  
470pF  
7
10  
AUDIO  
VCCA  
8
9
10nF  
SPLLFLT  
VIDEO  
220nF  
10nF  
100nF  
15K  
22nF  
100nF  
75  
O
O
Vcc  
O
Video  
Audio  
Note 1: Cx value depends on crystal characteristics; Cx = 27pF on Motorola application board.  
Note 2: Loop Filter components must be as close as possible to pins 14 and 15  
Note 3: The 220K pull down resistor set the STBY pin opencondition to standby mode.  
If not connected, the opencondition is normal mode”  
Figure 7. Proposed MC44BC374T1 Application Schematic  
22  
MC44BC374T1 Technical Data  
MOTOROLA  
Application and Case Diagrams  
16.2 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.  
16.3 Marking Instructions  
:
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  
M44BC374T1  
chamfer and dimple areas.  
Pin 1 Dot or Dimple  
1st line:  
44BC374T1 for MC44BC374T1 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  
MC44BC374T1 Technical Data  
23  
Application and Case Diagrams  
Note: 1. Dimensions and Tolerances per ASME Y14.5M,  
1994.  
Millimeters  
Dim  
Inches  
Min  
Max  
Min  
Max  
Note: 2. Controlling dimension: Millimeters.  
Note: 3. Dimension D and E1 do not include mold  
protrusion.  
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: 4. Maximum mold protrusion 0.15 (0.006) per side.  
9.8  
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.  
5.8  
6.2  
E1  
b
3.8  
4
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 8. SO16NB Package  
24  
MC44BC374T1 Technical Data  
MOTOROLA  
Application and Case Diagrams  
MOTOROLA  
MC44BC374T1 Technical Data  
25  
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  
MC44BC374T1/D  
This datasheet has been download from:  
www.datasheetcatalog.com  
Datasheets for electronics components.  

相关型号:

MC44BC374T1DR2

SPECIALTY CONSUMER CIRCUIT, PDSO16, SO-16
MOTOROLA

MC44BC375

PLL Tuned VHF Audio/ Video High Integration Modulator ICs
MOTOROLA

MC44BC375

PLL Tuned VHF Audio/Video High Integration Modulator ICs
FREESCALE

MC44BC375J

PLL Tuned VHF Audio/ Video High Integration Modulator ICs
MOTOROLA

MC44BC375J

PLL Tuned VHF Audio/Video High Integration Modulator ICs
FREESCALE

MC44BC375JD

PLL Tuned VHF Audio/ Video High Integration Modulator ICs
MOTOROLA

MC44BC375JD

PLL Tuned VHF Audio/Video High Integration Modulator ICs
FREESCALE

MC44BC375JD

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

MC44BC375JDR2

SPECIALTY CONSUMER CIRCUIT, PDSO16, SO-16
MOTOROLA

MC44BC375T

PLL Tuned VHF Audio/ Video High Integration Modulator ICs
MOTOROLA

MC44BC375T

PLL Tuned VHF Audio/Video High Integration Modulator ICs
FREESCALE

MC44BC375TD

PLL Tuned VHF Audio/ Video High Integration Modulator ICs
MOTOROLA