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MC44BC374C

Features: • No external varicaps diodes/inductor or tuned components• Channel 21-69 UHF operation• VHF range possible by internal dividers (30MHz450MHz)• Integrated on-chip programmable UHF oscillator• Extremely low external components count• High speed read and...

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SeekIC No. : 004416017 Detail

MC44BC374C: Features: • No external varicaps diodes/inductor or tuned components• Channel 21-69 UHF operation• VHF range possible by internal dividers (30MHz450MHz)• Integrated on-chip p...

MC44BC374C Data Sheet

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Part Number:
MC44BC374C
Supply Ability:
5000

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

• No external varicaps diodes/inductor or tuned components
• Channel 21-69 UHF operation
• VHF range possible by internal dividers (30MHz450MHz)
• Integrated on-chip programmable UHF oscillator
• Extremely low external components count
• High speed read and write I2C-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 I2C bus programming required)
• Extremely robust ESD protection, minimum 4kV, typical 6kV


Pinout

Connection Diagram


Specifications

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
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

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
thanmaximum 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.


Description

The channel MC44BC374C 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 MC44BC374C 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 MC44BC374C standard can be chosen using a control bit that selects between System L or System B/ (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.




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