MOTOROLA MC44BC375, MC44BC375U, MC44BC375J, MC44BC375T Technical data

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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

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(U Version) 6 9 Video Characteristics . . 7 10 Audio Characteristics . . 7 11 Characterization

Measurement

Conditions 7 12 Modulator

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

SFS

PLLFLT

TVOVCC

TVOUT

GND

VCCA

VIDEO

PSave/LO

-20°C to +85°C SO16NB

Figure 1. MC44BC375U/J/T Pin Connection Diagram

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Features

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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 using pin Sound Frequency Selection (SFS). The Pictureto 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

• Integrated On-Chip Oscillator - No external tank circuit

• Extremely Low External Components Count

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• 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)

2 MC44BC375/U/J/T Technical Data MOTOROLA

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Device Overview

2 Device Overview

Figure 2 shows a simplified block diagram of the MC44BC375U/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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VOVCC

VOUT

ower

ave

save/

Snd Freq Select

-SFS

Channel Select CHS

PS1/2 Select

-PSS

LOP

Ω

Video

Modulator

LPF

Sound

Modulator

Prescaler

CHS

Peak

White Clip

31.25kHz

Test Mode

Divider

VHF

Divider

UHF

OSC.

Prog.

Divider

SFS

VIDEO

Clamp

Sound

PFD

Prog.

PLL

Phase Comp.

SPLLFLT

Sound

Oscillator

and FM

Modulator

LPF ALC

VCO & PLL

31.25kHz

MODULATOR

SECTION

Audio Ampli

PSS

SECTION

Ref Divider

/128

4Mhz

XCO

AUDI

PREE

VCCA

GND

Figure 2. MC44BC375/U/J/T Block Diagram

MOTOROLA MC44BC375/U/J/T Technical Data 3

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PLLFLT

XTAL

Maximum Ratings

Freescale Semiconductor, Inc.

3 Maximum Ratings

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.

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4 Thermal Rating

Sym Parameter Value Unit

Thermal resistance from Junction to Ambient 140 °C/W

thja

This device contains protection circuitry to guard

against damage due to high static voltage or electric

fields. However, precautions must be taken to avoid

applications of any voltage higher than maximum rated

voltages to this high impedance circuit. For proper

operation, input and output voltages should be

constrained to the ranges indicated in the

Recommended Operating Conditions.

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

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4 MC44BC375/U/J/T Technical Data MOTOROLA

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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

Operating Supply Voltage range 4.5 5.0 5.5 V B

Total Supply Current 40 47 55 mA All sections active A

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Total Standby Mode Supply Current 3 5 7 mA PSave/LO=LO A

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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

MOTOROLA MC44BC375/U/J/T Technical Data 5

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Pin Selection

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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

Pin DC level Description

Vcc + 0.3V

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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

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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NOTE:

Test modes are intended for m anufacturing test 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

6 MC44BC375/U/J/T Technical Data MOTOROLA

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