Technical Data
MC44C401/D
Rev. 1.0 08/2003
MC44C401
MTS Stereo Encoder
MC44C401
Ordering Information
Device
MC44C401FA
Temp. Range
0°C to 70°C
Package
32TQFP
Contents
1 Features . . . . . . . . . . . . . 1
2 Reference
Documentation
2
3 Block Diagrams . . . . . . . 3
4 I/O Description . . . . . . . 5
5 Electrical Specifications 6
6 Package Data . . . . . . . . 8
7 Functional Description 10
8 Calibration . . . . . . . . . . 11
The MC44C401 Multi-Channel Television Sound (MTS) Stereo Encoder is the
industry’s first, single-chip, CMOS implementation of a Broadcast Television Sys-
tems Committee (BTSC)-compatible stereo encoder.
The MC44C401 MTS Stereo Encoder is designed for use in set-top boxes, VCRs,
DVD players/recorders, game stations, and other applications that are required to
output high-quality stereo sound through a single RF coaxial cable.
The digital audio processing used in the MC44C401 preserves the full fidelity of sur-
round sound and other audio coding schemes while ensuring overall system perfor-
mance is not impacted by copy protection technologies.
The MC44C401 is engineered to process right and left analog audio signals and base-
band composite video to generate a stereophonic composite signal in accordance
with BTSC system standards. The MC44C401 is designed to output this signal to a
Motorola RF modulator, which in turn produces a stereo encoded RF channel for use
with any BTSC stereo television receiver.
1 Features
•
•
•
•
Integrated A/D input and D/A output circuitry
CEX
™
digital audio processing encodes and transports stereo signals
Surround sound and Macrovision™ compatible
Extended low frequency response (The MC44C401 frequency response extends
below 25 Hz)
This document contains information on a product under development. Motorola reserves the right to change or
discontinue this product without notice. © Motorola, Inc., 2002, 2003. All rights reserved.
Reference Documentation
•
•
•
•
•
Simple passive interface to Motorola’s MC44BC374 (UHF/VHF) and MC44BC375 (VHF)
modulators
Preservation of original surround sound fidelity
System performance not impacted by copy protection technologies
Enables lower system component count, smaller board size, and significantly lower overall system
cost
Eliminates manual alignment of filters, phase controls, and composite signal amplitude
2 Reference Documentation
“Multichannel Television Sound Transmission and Audio Processing Requirements for the BTSC
System”, FCC OET Bulletin No. 60, February 1986.
2
MC44C401 Technical Data
MOTOROLA
I/O Description
4 I/O Description
4.1 Signal List
The Stereo Modulator I/O signals are described in Table 1.
Table 1. MC44C401 Signal Descriptions
Signal
Analog
VINLP
VINLM
VREFP
VAGO
VREFM
VINRP
VINRM
CVBS
Digital
DOLPRP
DOLPRM
DOLMRP
DOLMRM
VID_PRES
NC
Clocks
XTALIN
XTALOUT
CLK4MHZ
Power Supply
APLLVDD
APLLVSS
SSVDD
30
29
31
APLL analog supply voltage, 1.8 V
APLL analog ground
Sync Separator analog supply voltage, 3.3 V
28
27
22
Crystal input
Crystal output
4 MHz clock for Audio/Video modulator IC
15
14
13
12
17
23
Left+Right channel output voltage plus
Left+Right channel output voltage minus
Left-Right channel output voltage plus
Left-Right channel output voltage minus
Video present flag, 0 = no video, hi-z = video
present
No Connection
2
3
4
6
5
9
10
1
Left channel input voltage plus
Left channel input voltage minus
Left & Right ADC ref. input voltage plus
Left & Right ADC analog virtual ground
Left Right ADC ref. input voltage minus
Right channel input voltage plus
Right channel input voltage minus
Composite video input
Pin #
Description
MOTOROLA
MC44C401 Technical Data
5
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