MC44C402
Rev 1, 06/2005
Freescale Semiconductor
Technical Data
Freescale Semiconductor, Inc., 2005. All rights reserved.
This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
MTS Stereo Encoder
The MC44C402 Multi-Channel Television Sound (MTS) Stereo Encoder is
based on the industry's first, single-chip, CMOS implementation of a Broadcast
Television Systems Committee (BTSC)-compatible stereo encoder, the
MC44C400.
The MC44C402 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 MC44C402 preserves the full fidelity
of surround sound and other audio coding schemes while ensuring overall
system performance is not impacted by copy protection technologies.
The MC44C402 is engineered to process right and left analog audio signals
and baseband composite video to generate a stereophonic composite signal in
accordance with BTSC system standards. The MC44C402 is designed to output
this signal to a Freescale RF modulator, which in turn produces a stereo encoded
RF channel for use with any BTSC stereo television receiver.
Features
Integrated A/D converter input and D/A converter output circuitry
CEXTM digital audio processing encodes and transports stereo signals
Surround sound and MacrovisionTM compatible
Extended low frequency response (The MC44C402 frequency response
extends below 25 Hz)
Simple passive interface to Freescale's MC44BS373/4 (UHF/VHF) and
MC44BC375 (VHF) modulators
Preservation of original surround sound fidelity
System performance not impacted by copy protection technologies
Low system component count, small board size, and significantly low overall
system cost
No manual alignment of filters or phase controls
Reference Documentation
"Multichannel Television Sound Transmission and Audio Processing Requirements for the BTSC System", FCC OET Bulletin
No. 60, February 1986.
MC44C402
MTS STEREO ENCODER
AC SUFFIX
32-LEAD LQFP PACKAGE
CASE 873A-04
ORDERING INFORMATION
Device
Temp.
Range
Package RoHS
MC44C402AC
40
C
to +85
C
32LQFP
yes
MC44C402ACR2
Tape & Reel
yes
DAC
DIGITAL
AUDIO
PROCESSOR
SYNC
SEPARATOR
CLOCK
GENERATOR
COMPOSITE
VIDEO
LEFT
CHANNEL
RIGHT
CHANNEL
XTAL
COMPOSITE
BTSC
CLOCK
OUT
ADC
ADC
MC44C402
PIN 1
ORIENTATION
MARK
9
25
17
Freescale
MC44C402
CVBS
ADCVDD
VREFM
ADCVSS
VINR
VAGO
VREFP
VAGO
XT
AL
I
N
XT
AL
OUT
SSV
SS
NC
NC
OVDD
DVSS
SSVDD
VID_PRES
CLK4MHZ
DVSS
DVSS
DVSS
DVDD
DVSS
PILOT
CA
NC
NC
NC
OV
DD
OVS
S
VI
NL
V
AGO
Functional Block Diagram
MC44C402 32LQFP Package
2
Freescale Semiconductor
MC44C402
Figure 1. MC44C402 Block Diagram
VINLP
VINRP
XTALIN
VAGO
VAGO
CA
Sync
Separator
SD DAC
XTALOUT
VREFP
VREFM
VAGO
CLK4MHZ
Osc
DVSS
DVSS
OVDD
4 MHz
OVDD
OVSS
ADCVSS
Sync
Separator
Ref
Clock
Generator
Audio Processor
SSVDD
SSVSS
28
27
9
10
4
6
5
7
8
2
3
1
31
32
22
15
11
16
DVSS
DVDD
DVSS
DVSS
26
25
24
21
20
19
18
VID_PRES
17
V-REF
MC44C402
23
ADCVDD
CVBS
15
PILOT
SD
ADC
SD
ADC
CEXTM
Freescale Semiconductor
3
MC44C402
PIN DESCRIPTION
Figure 2. MC44C402 32LQFP Package
Table 1. Pin Descriptions (Listed by Function)
Signal Name
Pin #
Description
Analog
VINL
9
Left channel input
VREFP
4
ADC Voltage Ref. Bypass plus
VAGO
3, 6, 10
Analog virtual ground
VREFM
5
ADC Voltage Ref. Bypass minus
VINR
2
Right channel input
CVBS
1
Composite video input to sync separator
Digital
CA
15
Composite Audio output
VID_PRES
17
Video present flag, 0 = no video, hi-z = video present
PILOT
23
15.734 KHz square wave output phased locked to incoming video
NC
12, 13, 14, 29, 30
No Connection
Clocks
XTALIN
28
Crystal oscillator input
XTALOUT
27
Crystal oscillator output
CLK4MHZ
22
4 MHz clock output for Audio/Video modulator IC
Power Supply
SSV
DD
31
Sync Separator analog supply voltage, 3.3 V
SSV
SS
32
Sync Separator analog ground
ADCV
DD
7
ADC analog supply voltage, 3.3 V
ADCV
SS
8
ADC analog ground
DV
DD
21
Digital Logic supply voltage, 1.8 V
DV
SS
16, 18, 19, 20, 24, 26
Digital Logic and I/O grounds
OV
DD
11, 25
I/O supply voltage, 3.3 V
PIN 1
ORIENTATION
MARK
9
25
17
Freescale
MC44C402
CVBS
ADCVDD
VREFM
ADCVSS
VINR
VAGO
VREFP
VAGO
XT
AL
I
N
XT
AL
OUT
SS
V
S
S
NC
NC
OVDD
DVS
S
SSVD
D
VID_PRES
CLK4MHZ
DVSS
DVSS
DVSS
DVDD
DVSS
PILOT
CA
NC
NC
NC
OVDD
OV
S
S
VI
NL
V
AGO
4
Freescale Semiconductor
MC44C402
ELECTRICAL SPECIFICATIONS
Table 2. Absolute Maximum Ratings
Absolute maximum continuos ratings are those maximum values beyond which damage to the device may occur. Exposure to
these conditions or conditions beyond those indicated may adversely affect device reliability. Functional operation at absolute-
maximum-rated conditions is not implied.
Characteristic
Symbol
Min
Max
Units
Digital Logic Supply Voltage
DV
DD
0.3
+2.0
V
Digital Output Supply Voltage
OV
DD
0.3
+4.0
V
ADC Supply Voltage
ADCV
DD
0.3
+4.0
V
Sync. Separator Supply Voltage
SSV
DD
0.3
+4.0
V
Input Voltage
V
in
0.3
xxV
DD
+ 0.3
V
Storage Temperature Range
T
stg
55
+150
C
Table 3.
General Specifications
Characteristic
Symbol
Min
Typ
max
Units
ESD Protection (Machine Model)
MM
200
V
ESD Protection (Human Body Model)
HBM
2000
V
Latch-Up Immunity
LU
200
mA
Table 4.
Recommended Operating Conditions
Characteristic
Symbol
Min
Typ
Max
Units
Digital Logic Supply Voltage
DV
DD
+1.62
+1.8
+1.98
V
Digital Output Supply Voltage
OV
DD
+2.97
+3.3
+3.63
V
ADC Supply Voltage
ADCV
DD
+2.97
+3.3
+3.63
V
Sync. Separator Supply Voltage
SSV
DD
+2.97
+3.3
+3.63
V
Left/Right Channel Input Level
VINL, VINR
1.8
V
pp
Composite Video Input Level (See
Figure 8
)
CVBS
0.5
1.0
2.0
V
pp
Ambient Temperature
T
A
40
+85
C
Table 5. DC Characteristics
Characteristic
(1)
Symbol
Min
Typ
Max
Units
Digital Logic Supply Current
IDV
DD
7.5
8.5
mA
Digital Output Supply Current
IOV
DD
2.0
8.0
mA
ADC Supply Current
IADCV
DD
7.0
9.0
mA
Sync. Separator Supply Current
ISSV
DD
2.0
mA
CLK4MHZ, Clock Output @ I = 0.6 mA
V
ol
2.97
V
ADC Voltage Ref. Bypass plus
VREFP
+2.0
V
ADC Voltage Ref. Bypass minus
VREFM
+1.0
V
ADC Voltage Ref. Ground
VAGO
+1.5
V
CLK4MHZ, Clock Output @ I = 0.6 mA
V
oh
3.63
V
1. Unless other wise noted; DV
DD
= 1.8 + 0.18 Vdc, OV
DD
= ADCV
DD
= SSV
DD
= 3.3 + 0.33 Vdc, GND = 0 Vdc, -40 < T
A
< 85
C.
Freescale Semiconductor
5
MC44C402
Figure 3. Stereo Separation
Figure 4. Amplitude Response
Table 6. AC Characteristics
Characteristic
(1)
Symbol
Min
Typ
Max
Units
Input Impedance (Left/Right Input)
R
in
75
k
Composite Audio Output Level
(2)
CA
1.0
V
pp
Composite Output Level
CA
2.2
V
pp
Signal to Noise Ratio
(2),(3)
SNR
72
75
dB
Total Harmonic Distortion
(2),(3)
THD
0.1
0.3
%
-1 dB Bandwidth
BW
20
14500
Hz
Stereo Separation 500 Hz - 5 KHz
(4)
35
dB
Stereo Separation 100 Hz - 10 KHz
(4)
30
35
dB
1. Unless other wise noted; DV
DD
= 1.8 + 0.18 Vdc, OV
DD
= ADCV
DD
= SSV
DD
= 3.3 + 0.33 Vdc, GND = 0 Vdc, -40 < T
A
< 85
C.
2. Test conditions, mono, 1 kHz @ 1.5 V
pp
3. Measured in 20 Hz to 13.5 kHz bandwidth
4. Measured -10 dB input level
-55
-5
-50
-45
-40
-35
-30
-25
-20
-15
-10
d
B
V
60
10k
100
200
500
1k
2k
5k
Hz
-50
+5
-45
-40
-35
-30
-25
-20
-15
-10
-5
+0
d
B
r
A
20
10k
50
100
200
500
1k
2k
5k
Hz
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