MC44BS374T1EF Freescale Semiconductor, MC44BS374T1EF Datasheet - Page 3

• Manufacturer Part Number: MC44BS374T1EF
• Description: IC AUDIO/VIDEO MODULATOR 16-SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MC44BS374T1EF

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

3 Pin Descriptions
• The device can be powered down without holding the I
• Switch between the two integrated VCO’s controlled directly by the frequency divider (@ 700
• The external standby pin is no more required as the I
• The standby pin is replaced by the LOP Logic Ouput Port pin (pin 3)
• Lower RF second harmonic spurious but higher third harmonic spurious. In the application it is
MHz)
not powered up.
easier to filter UHF third harmonics spurious than second harmonics as these frequencies are always
out of the UHF band. Unfortunately the second harmonic can fall back into the same UHF band (for
instance channel 21 second harmonic). For this reason it is almost impossible to have a good
rejection of low UHF second harmonic with an external low pass filter. This is the reason why the
design has been optimized for a maximum second harmonic rejection in spite of an increase of the
third harmonic.
Pin number
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
Freescale Semiconductor, Inc.
MC44BS374T1/374T1A Advance Information
For More Information On This Product,
Table 1. SO16 Package Pin Descriptions
Pin Name
PREEMP
TVOVCC
SPLFLT
PLLFLT
TVOUT
AUDIO
VIDEO
VCCD
GNDD
VCCA
XTAL
GND
GND
SDA
LOP
SCL
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I2C clock
I2C data
Logical output port controlled by I2C bus
Crystal
Ground
Pre-emphasis capacitor
Audio input
Sound PLL loop filter
Video input
Main analog supply voltage
Analog ground
TV output signal
TV output stage supply voltage
RF PLL loop filter
Digital supply voltage
Digital ground
2
C lines are not hold down when the device is
2
Description
C lines down
Pin Descriptions