MC44BC374 MOTOROLA [Motorola, Inc], MC44BC374 Datasheet
MC44BC374
Available stocks
Related parts for MC44BC374
MC44BC374 Summary of contents
Page 1
... 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. MC44BC374T1 SO16NB Package Ordering Information Device MC44BC374T1D, R2 NOTE: For tape and reel, add R2 suffix. SCL GNDD 1 16 ...
Page 2
... 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. ...
Page 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. ...
Page 4
... For proper o –65 C operation, input and output voltages should be o constrained to the ranges indicated in the 150 C Recommended Operating Conditions. 150 °C Parameter Parameter MC44BC374T1 Technical Data Value Unit 140 °C/W Min Typ Unit 200 500 V 4000 6000 V ...
Page 5
... Bit 4 Bit PWC OSC ATT SFD1 SFD0 0 TPEN N11 N10 Description MC44BC374T1 Technical Data Electrical Characteristics , 10-step grayscale. p-p Unit Notes Type All sections active A mA Bus Section active A µS B µA A µA A µA A KΩ ...
Page 6
... OFF. Video PWC 0 Peak White Clip ON 1 Peak White Clip OFF TPEN 0 Test pattern signal OFF (normal operation) 1 Test pattern signal ON (picture and sound) Description MC44BC374T1 Technical Data UHF Oscillator Modular Output Attenuation Peak White Clip Test Pattern Signal MOTOROLA ...
Page 7
... Sound phase comparator 1µA lower source on SPLLFIL 2.h (Not valid during transient output inhibit) 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 Description NOTE: MC44BC374T1 Technical Data I2C Programming ) 7 ...
Page 8
... Typical Figure 3. Typical Performance MC44BC374T1 Technical Data , 10-step grayscale. p-p Min Typ Max Unit Type 73 74.5 77 dBµ ...
Page 9
... Test Conditions PAL V ide o M odulation De pth Typical 471 521 571 621 671 721 771 821 871 Figure 4. Typical performances MC44BC374T1 Technical Data Video Characteristics , 10-step grayscale. RF p-p Min Typ Max Unit Type –1.5 –0.8 — — ...
Page 10
... C, Video Input 1V Test Conditions Audio Signal to Noise Typical Minimum specification 471 521 571 621 671 721 771 821 871 Frequency (Mhz) Figure 5. Typical performances MC44BC374T1 Technical Data , 10-step grayscale. p-p Min Typ Max Unit Type — ...
Page 11
... 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 Fo +5.5Mhz MC44BC374T1 Technical Data Sound 3rd harm +11Mhz +16.5Mhz 11 ...
Page 12
... Intermod. +1.07Mhz 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 2nd harmonic Fo 2Fo MC44BC374T1 Technical Data Sound carrier Chroma 2nd Harmonic +8.86Mhz Sound Chroma carrier carrier +4.43Mhz +5.5Mhz ...
Page 13
... The largest positive or negative difference indicates the distortion. the largest positive or negative difference DIFF PHASE = the phaseat position 0 The video analyzer method takes the worst step from the first 4 steps. MC44BC374T1 Technical Data Fo Fo*3 100% 13 ...
Page 14
... Picture carrier Fo +5.5Mhz 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 deviation, based on specified standards. MC44BC374T1 Technical Data 100% ...
Page 15
... TV set. In this mode the Nyquist filter is bypassed and the video carrier is used without added delay to effectuate intercarrier conversion. In this mode the phase noise information fully cancels out and the true S/N can be measured ( ) × ASN log MC44BC374T1 Technical Data is supplied by the Audio Analyzer, ) ⁄ Distorsion + Noise + Signal ...
Page 16
... Modulator Operation 13 Modulator Operation 13.1 Power ON Settings At power-ON, the MC44BC374T1 configuration is as follows: WRITE MODE C1—High Order Bits C0—Low Order Bits FM—High Order Bits FL—Low Order Bits Note N11 are set to have UHF oscillator on channel 71 (871.25MHz). Note: Peak White Clip is ON. ...
Page 17
... 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 50 MOTOROLA Normal Standby high impedance MC44BC374T1 Technical Data Modulator Operation µA typical to speed up the µA . Use care when selecting µ ...
Page 18
... 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 16. 13.10 Differences From MC44BC374C device • “OSC” bit programming is inverted • ...
Page 19
... SSCL Tsu;sto Thd;sta Tsu;dat 14.3 Levels Definition SDA MOTOROLA o C. ACK ... SDA SCL ... Thd;dat Tack:low Vcc Vih ... dead band Vil 0V MC44BC374T1 Technical Data High Speed I2C Compatible Bus Min Typ Max Unit Type µA — — — — 1 3.0 — — µ ...
Page 20
... First Data Byte (C1 or FM) ACK STO STO Chip Address FL = Frequency information, low order bits CO = Control information, low order bits MC44BC374T1 Technical Data Stop Data ACK ACK 2 C bus) is: FL STO C0 STO MOTOROLA ...
Page 21
... VCC PREM 11.8k VCC VCC 5K SPLLFLT VCC VCC 100 PLLFLT 2K MOTOROLA VCC 1/2 VCCD SCL 10k audio Figure 6. Pin Schematics MC44BC374T1 Technical Data Pin Circuit Schematics VCCD 25K 1/2 VCCD VCC STBY VCC 50k AUDIO IN VCC TV OUT VCC 75 TVOVCC VCC VIDEO 10K 500 10K ...
Page 22
... 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 “open” condition to “standby mode”. If not connected, the “open” condition is “normal mode” Figure 7. Proposed MC44BC374T1 Application Schematic 22 Vcc ...
Page 23
... Bar width mils, length least four times Bar width. Bar placement may extend across chamfer and dimple areas. • 1st line: 44BC374T1 for MC44BC374T1 device (Part number coded on 10 digits) • 2nd line: Assembly site code AW (2 digits) followed by the ...
Page 24
... Maximum mold protrusion 0.15 (0.006) per side. 0.393 Note: 5. Dimension b does not include Dambar 0.244 protrusion. 0.157 Allowable Dambar protrusion shall be 0.127 (0.005) 0.019 total in excess of the b dimension at maximum material condition. 0.009 0.050 BSC 0.049 0.019 Figure 8. SO16NB Package MC44BC374T1 Technical Data MOTOROLA ...
Page 25
... MOTOROLA MC44BC374T1 Technical Data Application and Case Diagrams 25 ...
Page 26
... 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 Equal Opportunity/Affirmative Action Employer. © Motorola, Inc. 2002 MC44BC374T1/D ...
Page 27
... This datasheet has been download from: www.datasheetcatalog.com Datasheets for electronics components. ...