MC44BC375UAD FREESCALE [Freescale Semiconductor, Inc], MC44BC375UAD Datasheet

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MC44BC375UAD

Manufacturer Part Number
MC44BC375UAD
Description
PLL Tuned VHF (Channel 3 / 4)Audio / Video Modulator
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
Freescale Semiconductor
Data Sheet
© Freescale Semiconductor, Inc., 2006. All rights reserved.
PLL Tuned VHF (Channel 3 / 4)
Audio / Video Modulator
use in VCRs, set-top boxes, and similar devices. They are designed for applica-
tions requiring National Television System Committee, NTSC, channel 3 or chan-
nel 4, RF outputs. The difference between the two modulators is the RF output
power level. The nominal RF
and the RF
sired channel 3 or 4 frequency isselected using the external package pin, Chan-
nel Selection (CHS). No external tank circuit components are required, reducing
the sensitivity of the PCB design and the need for external adjustments. The PLL
obtains its reference from a 4.0 MHz crystal oscillator.
programmable PLL to derive subcarrier frequencies. The 4.5 MHz or 5.5 MHz
sound carrier frequency is selectable via the package pin, Sound Frequency Se-
lection (SFS). The Picture to Sound subcarrier ratio is also selectable by the pin,
Picture to Sound Selection (PSS), to choose either a 14 dB or 16 dB ratio.
all internal VCOs and mixers and simultaneously switches ON an output pin,
Logic Output Port (LOP), which may be used as an antenna switch driver.
Features
The MC44BC375U and MC44BC375UA are audio/video RF modulators for
The modulators incorporate a sound subcarrier oscillator and use a second
A low-power standby mode is selectable via the pin, Psave/LO, which turns off
Video In
Audio In
A programmable Phase-Locked Loop (PLL) tunes the modulator, and the de-
Two RF output power levels offered:
U.S. broadcast frequency for Channel 3 or 4 operation is selected by CHS pin
Programmable VHF oscillator and sound subcarrier oscillator. No external varicaps,
diodes/inductors, or tuned components required.
Programmable Picture/Sound Carrier Ratio (14 dB or 16 dB) is selected by PSS pin
Programmable Sound Subcarrier Oscillator (4.5 or 5.5 MHz) is selected by SFS pin)
Peak White Clip
Low-power standby mode is selected by the Psave/LO pin
Logic Output Port is selected by Psave/LO pin (Antenna Switch Driver)
Transient output inhibit during PLL Lock-up at power-ON
Available in Pb-free, RoHS compliant, narrow body SOIC 16 package
Also available, for a limited time, in the standard Pb package with the D suffix
Crystal
MC44BC375U has typical RF
MC44BC375UA has typical RF
OUT
level for the MC44BC375UA is 80 dBµV (typical).
AM/FM
Clamp
Audio
Clip
MC44BC375U/UA
Channel 3/4
OUT
Control
VCO
level for the MC44BC375U is 76 dBµV (typical)
OUT
OUT
power of 76 dBµV
Mixer
Mixer
power of 80 dBµV
Σ
TVOUT
Note: For tape and reel, add the R2 suffix.
MC44BC375UAEF, R2
MC44BC375UAD, R2
MC44BC375UEF, R2
MC44BC375UD, R2
Device
ORDERING INFORMATION
Document Number: MC44BC375U
AUDIO / VIDEO MODULATOR
MC44BC375UA
MC44BC375U
-20°C to +85°C
-20°C to +85°C
-20°C to +85°C
-20°C to +85°C
Temp. Range
SOIC 16 PACKAGE
PLL TUNED VHF
(CHANNEL 3 / 4)
D or EF SUFFIX
CASE 751B-05
Rev 3, 8/2006
RoHS
Yes
Yes
No
No

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MC44BC375UAD Summary of contents

Page 1

... OUT Mixer Σ TVOUT MC44BC375UEF, R2 MC44BC375UAEF, R2 MC44BC375UD, R2 Mixer MC44BC375UAD, R2 Note: For tape and reel, add the R2 suffix. Document Number: MC44BC375U Rev 3, 8/2006 MC44BC375U MC44BC375UA PLL TUNED VHF (CHANNEL AUDIO / VIDEO MODULATOR SUFFIX SOIC 16 PACKAGE ...

Page 2

Table 1. Package Pin Descriptions Pin Pin Name number 1 CHS 2 PSS 3 LOP 4 XTAL 5 GND 6 PREEMP 7 AUDIO 8 SPLFLT 9 PSAVE/LO 10 VIDEO GND RFOV 15 PLLFLT 16 ...

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Figure 2 shows a simplified block diagram of the MC44BS375U and MC33BS375UA devices. There are two main sections PLL section to synthesize the VHF output channel frequency for channel 3 or channel 4. RFOV 14 CC 75Ω Modulator ...

Page 4

TRANSIENT OUTPUT INHIBIT To minimize the risk of interference to other channels while the UHF PLL is acquiring a lock on the desired frequency, the Sound and Video modulators are turned OFF at power-ON (i.e switched from 0 ...

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Table 3. Absolute Maximum Ratings Absolute maximum continuous 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 ...

Page 6

PERFORMANCE CHARACTERISTICS Unless otherwise stated, all performance characteristics are for: • Power Supply 5 • Ambient Temperature • Video Input 1 10-step grayscale. p-p RF inputs/outputs into 75 ...

Page 7

Table 8. Audio Performance Characteristics Parameter Picture-to-Sound ratio PSS pin = High PSS pin = Low Picture to Sound ratio difference between PSS = HI and PSS = LO Audio modulation depth Using specific pre-emphasis circuit, Audio input = 1.0 ...

Page 8

CHARACTERIZATION MEASUREMENT CONDITIONS Device default configuration unless otherwise specified: • Sound subcarrier frequency = 5.5 MHz • Picture-to-sound carrier ratio = 14 dB • CH3 and CH4 frequencies Table 9. Performance Measurement Test Set-Ups Device and Signals Set-Up Video: 10 ...

Page 9

Table 9. Performance Measurement Test Set-Ups (continued) Device and Signals Set-Up No audio signal Video: 700 mV 100 kHz sinusoidal signal (pp) inserted on the black level of active video area.This is generated using a Video Generator and inserting the ...

Page 10

Table 9. Performance Measurement Test Set-Ups (continued) Device and Signals Set-Up Video: 100% White video signal — 1 Vpk-pk. No audio signal This is measured using a Demodulator in B/G using a CCIR Rec. 567 weighting network, 100 KHz to ...

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Table 9. Performance Measurement Test Set-Ups (continued) Device and Signals Set-Up No audio signal Video: 10 step grey scale No video signal No audio Signal “PSS” pin set Low and High Video Black Level Audio signal: 1.0 KHz, 205 mVrms. ...

Page 12

Table 9. Performance Measurement Test Set-Ups (continued) Device and Signals Set-Up Audio: 1.0 KHz, adjustable level Video: EBU Color Bars This is measured using a Demodulator in B/G and an Audio Analyzer at 1.0 KHz. The output level of the ...

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Figure 4. Application Specific Products Freescale Semiconductor APPLICATION SCHEMATIC MC44BC375U/UA Application Schematic MC44BC375U 13 ...

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MC44BC375U 14 PACKAGE DIMENSIONS Figure 5. SOIC16 Package Dimensions Application Specific Products Freescale Semiconductor ...

Page 15

Application Specific Products Freescale Semiconductor Figure 6. SOIC16 Package Dimensions - part 2 MC44BC375U 15 ...

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How to Reach Us: Home Page: www.freescale.com E-mail: support@freescale.com USA/Europe or Locations Not Listed: Freescale Semiconductor Technical Information Center, CH370 1300 N. Alma School Road Chandler, Arizona 85224 +1-800-521-6274 or +1-480-768-2130 support@freescale.com Europe, Middle East, and Africa: Freescale Halbleiter Deutschland ...

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