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آی سی مدولاتور
MC44BC374CD
PLL Tuned UHF and VHF Audio/Video High Integration Modulator
کیفیت: ORIGINAL(distributor) پکیج:
قیمت تک فروشی 639,791 ریال
قیمت عمده 395,874 ریال (10 به بالا)
قیمت ویژه 388,557 ریال (100 به بالا)
قیمت فوق العاده384,898 ریال (1000 به بالا)
 قیمت تک فروشی 0.908 تتر با تخفیف
4.852.912.852.82
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توضیحات
Description
The channel is set by an on-chip high-speed I2C 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 I2
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 I2
C bus programming required)
• Extremely robust ESD protection, minimum 4kV, typical 6kV
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