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MOTOROLA MC44BC373 374 Rev. 3.5, User's Manual, Technical Specifications

Summary

This sophisticated Multi-Standard Modulator IC and Antenna Booster/Splitter is engineered for advanced video transmission applications in set-top boxes, VCRs, and game systems. The device features high-speed I²C bus compatibility and ultra-low component counts, optimizing challenging broadcast designs. This technical guide provides comprehensive data on the IC's operation, electrical specifications, pin mapping, and modulation features, making it an essential resource for electronics engineers building reliable, adaptable RF broadcast hardware.

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查询MC44BC373供应商 Freescale Semiconductor, Inc.

Technical Data

MC44BC373/374 Rev. 3.5, 7/2003

MC44BC373/374 MC44BC373/374 Multi-Standard or PAL/ NTSC Modulator with integrated antenna booster/splitter ICs

TSSOP 24 Package

Ordering Information Device Temp Range Package

MC44BC373DTB,R2

–10o C to +80o C TSSOP24

MC44BC374DTB,R2

NOTE: For tape and reel, add R2 suffix.

Contents These modulator ICs are for use in VCRs, games, set-top boxes, and similar devices. Features . . . . . . . . . . . . . 2

Figure 1 shows the pin connections.

Device Overview . . . . . . 3 Maximum Ratings . . . . . 5 Electrostatic Discharge 5

SCL GNDD

Electrical Characteristics 5 SDA VCCD I2C Bit Mapping . . . . . . . 6 PLLFLT

I2C Programming . . . . . 7

XTAL TVOVCC

Modulator High

GND TVOUT

Frequency Characteristics 9

ANT1 GND

Video Characteristics . 10

ANT2 GND

Audio Characteristics . 11

GND VCRTU

Antenna Booster/Splitter Characteristics 12 PREEM VCRVCC Modulator Operation . 14

AUDIO VCCA

High-Speed I2C

SPLFLT VIDEO14

Compatible Bus 18

Application and AUXIN VCCI

Case Diagrams 21

Figure 1. MC44BC373/374 Pin Connections

This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice. © Motorola, Inc., 2003. All rights reserved.

For More Information On This Product, Go to: www.freescale.com

Page Summary Contents For MOTOROLA MC44BC373 374 Rev. 3.5, User's Manual, Technical Specifications

Page 1 re sc le ic to r, 查询MC44BC373供应商 Freescale Semiconductor, Inc. Technical Data MC44BC373/374 Rev. 3.5, 7/2003 MC44BC373/374 MC44BC373/374 Multi-Standard or PAL/ NTSC Modulator with integrated antenna b...
Page 2 re sc le ic to r, Freescale Semiconductor, Inc. Features 1 Features MC44BC373: Multi-Standard PAL/SECAM/NTSC with integrated booster splitter MC44BC374: PAL/NTSC with integrated booster splitter The c...
Page 3 re sc le ic to r, Freescale Semiconductor, Inc. Device Overview 2 Device Overview Figure 2 shows a simplified block diagram of the MC44BC373/4 device. The MC44BC373/374 device contains four main secti...
Page 4 re sc le ic to r, Freescale Semiconductor, Inc. Device Overview LO ID LL LT IO ea IO hi te /B .2 id eo k H IO od ul at or ou nd ou nd sc ill at or ud io an pl ifi er od ul at or LP LC iv id er L/BG ou...
Page 5 re sc le ic to r, Freescale Semiconductor, Inc. Maximum Ratings 3 Maximum Ratings Sym Parameter Value Unit This device contains protection circuitry to Vcc1 Supply Voltage guard against damage due to ...
Page 6 re sc le ic to r, Freescale Semiconductor, Inc. I2C Bit Mapping 6 I2C Bit Mapping WRITE MODE Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 ACK CA-CHIP ADDRESS ACK C1-High Order Bits AUX SO LOP PS X3...
Page 7 re sc le ic to r, Freescale Semiconductor, Inc. I2C Programming 7 I2C Programming Sound UHF SFD1 SFD0 Sound Subcarrier Freq (MHz) OSC UHF Oscillator 4.5 Normal operation. 5.5 UHF oscillator disabled (...
Page 8 re sc le ic to r, Freescale Semiconductor, Inc. I2C Programming WRITE MODE: Test Mode 2 X5 X4 X3 State Description 2.a Normal operation. 2.b Test pattern generator DC verification (Test pattern DC tes...
Page 9 re sc le ic to r, Freescale Semiconductor, Inc. Modulator High Frequency Characteristics 8 Modulator High Frequency Characteristics Unless otherwise stated: Vcc=5.0V, Ambient Temperature=25o C, Video ...
Page 10 re sc le ic to r, Freescale Semiconductor, Inc. Video Characteristics 9 Video Characteristics Unless otherwise stated: Vcc=5.0V, Ambient Temperature=25o C, Video Input 1Vp-p, 10-step grayscale. RF inp...
Page 11 re sc le ic to r, Freescale Semiconductor, Inc. Audio Characteristics 10 Audio Characteristics Unless otherwise stated: Vcc=5.0V, Ambient Temperature=25o C, Video Input 1Vp-p, 10-step grayscale. RF in...
Page 12 re sc le ic to r, Freescale Semiconductor, Inc. Antenna Booster/Splitter Characteristics 11 Antenna Booster /Splitter Characteristics o C, RF inputs Unless otherwise stated: Vcc=5.0V, Ambient Temperat...
Page 13 re sc le ic to r, Freescale Semiconductor, Inc. Antenna Booster/Splitter Characteristics 11.2 Typical Performance—Noise Figure Noise Figure @ Modulator OFF Noise Figure @ Modulator ON Maximum specific...
Page 14 re sc le ic to r, Freescale Semiconductor, Inc. Modulator Operation 12 Modulator Operation 12.1 Power-ON Settings At power-ON, the MC44BC373 and MC44BC374 configuration is as follows: WRITE MODE Bit 7...
Page 15 re sc le ic to r, Freescale Semiconductor, Inc. Modulator Operation 12.4 Test Bit TB1 This test bit allows an initial evaluation of MC44BC373 and MC44BC374 using software developed for MC443535: TB1= ...
Page 16 re sc le ic to r, Freescale Semiconductor, Inc. Modulator Operation There is a time-out of 263ms until the output is enabled. This allows the UHF PLL settle to its programmed frequency. During the 263...
Page 17 re sc le ic to r, Freescale Semiconductor, Inc. Modulator Operation The auxiliary audio input adds a sound subcarrier to the main carrier. The input can be a modulated NICAM carrier or a second sound ...
Page 18 re sc le ic to r, Freescale Semiconductor, Inc. High-Speed I2C Compatible Bus 13 High-Speed I2C Compatible Bus 13.1 Specification Conditions Unless otherwise specified, the Vcc1=5.0V and the ambient t...
Page 19 re sc le ic to r, Freescale Semiconductor, Inc. High-Speed I2C Compatible Bus 13.3 Levels Definition Vcc Vih SDA dead band Vil 0V Figure 12. SDA Levels 13.4 High-Speed I2C Compatible Bus Format SCL ST...
Page 20 re sc le ic to r, Freescale Semiconductor, Inc. High-Speed I2C Compatible Bus The first and third data bytes contain a function bit which lets the IC distinguish between frequency information and cont...
Page 21 re sc le ic to r, Freescale Semiconductor, Inc. Application and Case Diagrams 14 Application and Case Diagrams Proposed Bi CMOS Modulator and Booster/Splitter Application This document contains inform...
Page 22 re sc le ic to r, Freescale Semiconductor, Inc. Application and Case Diagrams CASE 940H-02 ISSUE Millimeters Inches Note: 1. Dimensioning and Tolerancing per ANSI Min Max Min Max Note: 2. Controlling ...
Page 23 re sc le ic to r, Freescale Semiconductor, Inc. NOTES MOTOROLA MC44BC373/374 Technical Data For More Information On This Product, Go to: www.freescale.com
Page 24 re sc le ic to r, 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 expre...

Manual Details

Brand Motorola
Pages 24
File Size 492.37 KB
Published July 22, 2026
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Frequently Asked Questions

What is the UHF operational frequency range?

It supports Channel 21–69 in UHF, with VHF operation possible using internal dividers ranging from 30MHz to 450MHz.

Does this modulator require external tuning components?

No, the device requires no external varicap diodes or tuned components.

How can I test the video signal output?

An on-chip video test pattern generator can be switched ON using a 1kHz audio test signal.

What systems is the MC44BC373/374 compatible with?

It supports multiple standards including B/G, I, D/K, H, L, and M/N systems while maintaining pin-to-pin and software compatibility.

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