MC44BS374T1AEF Freescale Semiconductor, MC44BS374T1AEF Datasheet - Page 2

• Manufacturer Part Number: MC44BS374T1AEF
• Description: IC AUDIO/VIDEO MODULATOR 16-SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MC44BS374T1AEF

• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Features
1 Features
The MC44BS374T1/374T1A is a PAL/NTSC Modulator with integrated VCO.
The channel is set by an on-chip high-speed I
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 6.5 MHz subcarrier frequencies. These frequencies are selectable by bus.
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 1 KHz audio test signal.
The MC44BS374T1/374T1A have the following features:
2 Comparing the MC44BS374T1 and MC44BS374T1A to the
Compared to the MC44BC374T1 devices, the MC44BS374T1/374T1A has the following improvements:
• Integrated on-chip programmable UHF oscillator
• No external varicaps diodes / inductor or tuned components
• Extremely low external components count
• Channel 21-69 UHF operation
• VHF range possible by internal dividers (30MHz-450MHz)
• Boosted TV output level (82 dBuV typical) for the MC44BS374T1A
• TV output level of 75 dBuV typical for the MC44BS374T1
• High speed read and write I
• I
• Fixed video modulation depth (82% typical)
• Peak White Clip disabled by bus
• Programmable picture/sound carrier ratio (12 dB and 16 dB)
• Integrated on-chip programmable sound subcarrier oscillator (4.5, 5.5, 6.0 and 6.5 MHz) - No
• 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
• Start-up on channel ‘71’ (871.25 MHz)
• ESD protection, minimum 4 kV
• Higher output level for the MC44BS374T1A (82 dBuV versus 74.5 dBuV)
• Higher Video signal to noise (+ 3 dB) for the MC44BS374T1A
• I
• Lower power consumption in normal and standby modes (-2 mA)
external varicaps
2
2
C-bus 5V and 3.3V compatible
C-bus 3.3V compatible
MC44BC374T1
Freescale Semiconductor, Inc.
MC44BS374T1/374T1A Advance Information
For More Information On This Product,
2
C-bus compatible (800kHz)
Go to: www.freescale.com
2
C compatible bus receiver. A Phase-Locked Loop ( PLL )