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參數(shù)資料
| 型號： | MC44BC374C |
| 廠商： | Motorola, Inc. |
| 英文描述： | PLL Tuned UHF and VHF Audio/Video High Integration Modulator |
| 中文描述： | 鎖相環(huán)調(diào)諧UHF和VHF音頻/視頻高集成調(diào)制器 |
| 文件頁數(shù)： | 2/30頁 |
| 文件大?。?/td> | 915K |
| 代理商： | MC44BC374C |
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MC44BC373C/374C Technical Data
For More Information On This Product,
Go to: www.freescale.com
MOTOROLA
Features
1
Features
MC44BC373C: Multi-Standard PAL/SECAM/NTSC Modulator
MC44BC374C: PAL/NTSC only Modulator
The channel is set by an on-chip high-speed I
2
C compatible bus receiver. A Phase-Locked Loop (PLL)
tunes the modulator over the full UHF range.
The modulator incorporates a sound subcarrier oscillator and uses a second PLL to derive 4.5, 5.5, 6.0,
and 6.5MHz subcarrier frequencies. These frequencies are selectable using the bus.
The modulation standard can be chosen using a control bit that selects between System L or System B/G
(MC44BC373C only).
The picture-to-sound ratio may be adjusted using the bus. In addition, an on-chip video test pattern
generator can be switched ON with a 1KHz audio test signal.
The MC44BC373C/4C also has the following features:
No external varicaps diodes/inductor or tuned components
Channel 21-69 UHF operation
VHF range possible by internal dividers (30MHz–450MHz)
Integrated on-chip programmable UHF oscillator
Extremely low external components count
High speed read and write I
2
C-bus compatible (800kHz)
Fixed video modulation depth (80% in PAL and 90% in SECAM)
Peak White Clip disabled via the bus
Programmable picture/sound carrier ratio (12dB and 16dB)
Integrated on-chip programmable sound subcarrier oscillator
(4.5MHz to 6.5MHz)—No external varicaps
On-chip video test pattern generator with sound test signal (1kHz)
Low-power programmable modulator standby mode
Transient output inhibit during PLL Lock-up at power-ON
Logical Output Port controlled by bus
Custom masked versions with unique start-up settings possible
(no I
2
C bus programming required)
Extremely robust ESD protection, minimum 4kV, typical 6kV
F
Freescale Semiconductor, Inc.
n
.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC44BC374CD | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:PLL Tuned UHF and VHF Audio/Video High Integration Modulator |
| MC44BC374CDR2 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:PLL Tuned UHF and VHF Audio/Video High Integration Modulator |
| MC44BC374CDTB | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC44BC374CDTBR2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC44BC374CED | 制造商:Motorola Inc 功能描述: |
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