Freescale MC44BC375, MC44BC375U, MC44BC375J, MC44BC375T Technical Data
Technical Data
MC44BC375/D
Rev. 2.6 01/2003
Freescale Semiconductor, Inc.
MC44BC375/U/J/T
PLL Tuned VHF Audio/
Video High Integration
Modulator ICs
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Contents List
1 Features ............. 2
2 DeviceOverview ......3
3 MaximumRatings .....4
4 ThermalRating .......4
5 Electrostatic Discharge 4
6Electrical
Characteristics 5
7 PinSelection ......... 6
8 High Frequency
Characteristics
(U Version) 6
9 Video Characteristics . . 7
10 Audio Characteristics . . 7
11 Characterization
Measurement
Conditions 7
12 Modulator
Freescale Semiconductor, I
Functionality 11
13 Pin Circuit Schematics 14
14 MC44BC375U Application
Schematic 15
15 Markings and Case
Diagrams 16
MC44BC375/U/J/T
SO16 Package
Ordering Information
Device Temp. Range Package
MC44BC375UD, R2
MC44BC375JD, R2
MC44BC375TD, R2
NOTE: For tape and reel, add R2 suffix.
This modulator circuit is for use in VCRs, set top boxes and similar devices. The device
differences are as follows:
• MC44BC375U VHF [CH3 & CH4] (Americas)
• MC44BC375J VHF [CH1 & CH2] (Japan)
• MC44BC375T VHF [CH13] (Taiwan)
CHS
PSS
LOP
XTAL
GND
PREEM
AUDIO
SPLFLT
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
SFS
PLLFLT
TVOVCC
TVOUT
GND
VCCA
VIDEO
PSave/LO
-20°C to +85°C SO16NB
Figure 1. MC44BC375U/J/T Pin Connection Diagram
This document contains information on a product under development. Freescale reserves the right to change or
discontinue this product without notice. © Motorola, Inc., 2002. All rights reserved.
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Features
Freescale Semiconductor, Inc.
1 Features
Channels are selectable using pin Channel Selection (CHS) and tuned by a PLL. They do not require any
external tank circuit components thus reducing the sensitivity of the PCB design and the need for external
adjustments. The PLL obtains its reference from a 4MHz crystal oscillator.
The sound subcarrier is also generated on-chip without external components. The 4.5MHz or 5.5MHz
Sound frequency is selectable usingpin SoundFrequency Selection (SFS). The Picture to Sound subcarrier
ratio is also selectable by pin Picture to Sound selection (PSS) to either 14dB or 16dB. A Power Save
function is selectable via pin Psave/LO which turns off all internal VCOs and mixers and simultaneously
switches ON the Logic Output Port (LOP). No external Varicap Diodes/ Inductor nor other tuned
components are needed.
The MC44BC375/U/J/T also has the following features:
• Channel selected by CHS pin
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• Integrated On-Chip Oscillator - No external tank circuit
• Extremely Low External Components Count
• Adjustable Video Modulation Depth (85% w/o adjustment)
•PeakWhiteClip
• Programmable Picture/Sound Carrier Ratio (14dB & 16dB) selected by PSS pin
•IntegratedOnNo external varicaps
• Modulator Standby Mode selected by Psave/LO pin
• Transient Output Inhibit During PLL Lock-up at Power-on
• Logic Output Port selected by Psave/LO pin (Antenna Switch Driver)
• Extremely Robust ESD protection, Minimum 4kV, typical 6kV.
• Available in 80 dBuV RF output level (MC44BC375UA).
chipProgrammableSound Subcarrier Oscillator (4.5 & 5.5MHzselectedby SFS pin)
Freescale Semiconductor, I
MC44BC375/U/J/T Technical Data
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M
O
Freescale Semiconductor, Inc.
Device Overview
2 Device Overview
Figure 2 shows a simplified block diagram of the M C44BC375U/J/Tdevice.
The MC44BC375U/J/T device has two main sections:
1. A modulator section which accepts audio and video inputs and modulates the VHF carrier.
2. A PLL section to synthesize the UHF/VHF output channel frequency (from an integrated
UHF oscillator, divided for VHF output)
The high frequency BICMOS technology permits integration of tank circuit and certain filtering functions.
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Freescale Semiconductor, I
VOVCC
VOUT
ower
ave
save/
OP
Snd Freq
Select
-SFS
Channel
Select CHS
PS1/2
Select
-PSS
14
16
13
9
1
2
75
LOP
3
Ω
Video
Modulator
LPF
LPF
Sound
Modulator
Prescaler
/8
CHS
Peak
White Clip
31.25kHz
Test Mode
Divider
VHF
Divider
UHF
OSC.
Prog.
Divider
Divider
SFS
VIDEO
10
Clamp
Sound
PFD
Prog.
PLL
Phase
Comp.
SPLLFLT
8
Sound
Oscillator
and FM
Modulator
LPF ALC
VCO & PLL
31.25kHz
MODULATOR
SECTION
Audio
Ampli
PSS
SECTION
Ref Divider
/128
4Mhz
XCO
7
6
11
5
AUDI
PREE
VCCA
GND
12
GND
15
PLLFLT
Figure 2. MC44BC375/U/J/T Block Diagram
MC44BC375/U/J/T Technical Data
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4
XTAL
Maximum Ratings
Freescale Semiconductor, Inc.
3 Maximum Ratings
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Sym Parameter Value Unit
Vcc Supply voltage 6 V
Tamin Minimum operating ambient temperature –20
Tamax Maximum operating ambient temperature 85
Tstgmin Minimum storage temperature –65
Tstgmax Maximum storage temperature 150
Tj Junction Temperature 150 °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.
o
o
o
o
This device contains protection circuitry to guard
against damage due to high static voltage or electric
fields. However, precautions must be taken to avoid
C
applications of any voltage higher than maximum rated
C
voltages to this high impedance circuit. For proper
operation, input and output voltages should be
C
constrained to the ranges indicated in the
C
Recommended Operating Conditions.
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
MM (Machine Model) - MIL STD 883C method 3015-7 200 500 V
ESD
HBM (Human Body Model) - MIL STD 883C method 3015-7 4000 6000 V
Freescale Semiconductor, I
MC44BC375/U/J/T Technical Data
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Electrical Characteristics
6 Electrical Characteristics
• A = 100% Tested
• B = 100% Correlation tested
• C = Characterized on samples
• D = Design parameter
6.1 Specification Conditions
Unless otherwise stated: Vcc = 5.0V, T amb. = 25°C.Video input 1Vp-p, 10 step greyscale. RF inputs /
outputs into 75Ω load. SPECIFICATIONS ONLY VALID FOR ENVELOPE DEMODULATION
Power Supply Parameters Min Typ Max Unit Notes Type
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Operating Supply Voltage range 4.5 5.0 5.5 V B
Total Supply Current 40 47 55 mA All sections active A
Total Standby Mode Supply Current 3 5 7 mA PSave/LO=LO A
DC Parameter Min Typ Max Unit Type
Threshold voltage level on pins CHS, PSS, SFS, PSave/LO 2.1 V C
Sound Comparator Charge Pump Current: During locking
When locked
RF Comparator Charge Pump Current 60 100 150 µA A
Crystal Oscillator Stability - negative resistance 1 - - KΩ D
Logic Output Port: Saturation voltage @ I=15mA
Leakage current
71012µA A
0.7 1 1.5 µA A
--210-3001mV
uA
A
A
Freescale Semiconductor, I
MC44BC375/U/J/T Technical Data
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Pin Selection
Freescale Semiconductor, Inc.
7 Pin Selection
Pin Nb Pin Name Device LO (grounded) HI (Open or +5V)
MC44BC375U
1 CHS
2 PSS MC44BC375U/J/T 14dB 16dB
9 PSave/LO MC44BC375U/J/T
16 SFS MC44BC375U/J/T 5.5Mhz 4.5Mhz
MC44BC375J
MC44BC375T
By default (open condition), all pins are “HI”.
7.1 Test Modes
CH4
CH2
CH13
Power save Mode
LOP pin LO (Low voltage)
CH3
CH1
CH13
Normal Operation
LOP pin HI (High impedance
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Freescale Semiconductor, I
Pin DC level Description
Vcc + 0.3V
CHS
Vcc + 1.1V
PSS Vcc + 1Vbe Transient Output Inhibit Disabled
SFS Vcc + 1Vbe Sound Oscillator OFF
VIDEO
Vcc + 0.3V
Vcc + 1.1V
Low frequency testing (RF frequency divided by 4 for MC44BC375U/J, and
divided by 8 for MC44BC375T)
Base band test mode (DC drive applied to modulators)
Force UHF and Sound PLL Upper current source
Force UHF and Sound PLL Lower current source
NOTE:
Test modes are intended for manufacturingtest purpose only and not to be
be used for normal application.
8 High Frequency Characteristics (U Version)
For all the following specifications and unless otherwise stated: Vcc = 5.0V, T amb. = 25°C.Video input
1Vp-p, 10 step greyscale.RF inputs / outputs into 75
ENVELOPE DEMODULATION. Measured on U version on both channel 3 and 4. See Section 11,
“Characterization Measurement Conditions” on page 7 for “C” type parameters.
Parameter Test Conditions Min Typ Max Unit Type
TV OUT output level 74 76 79 dBµV B
Sound subcarrier Harmonics (fp+n*fs) Ref Picture carrier - -73 -65 dBc C
Second Harmonic of chroma subcarrier. Using red EBU bar - -65 -55 dBc C
Chroma/Sound intermodulation: fp + (fsnd-fchr) Using red EBU bar - -65 -60 dBc C
Fo (picture carrier) Harmonics (See Note1)
Out Band (picture carrier) Spurious 1/2*Fo - 1/4*Fo - 3/2*Fo - 3/4*Fo 27 dBµV C
In band spurious (Fo +/- 5 MHz range) No video or sound modulation -70 -62 dBc C
4 MHz Crystal Spurious (Fo +/- 4 MHz) No video or sound modulation -82 -75 dBc C
Note: 1: Picture carrier harmonics are highly dependant on PCB layout and decoupling capacitors.
2nd harmonic
3rd harmonic
Ω load.SPECIFICATIONS ONLY VALID FOR
30664269dBµV
dBµVCC
MC44BC375/U/J/T Technical Data
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