MC44BC374EJB Freescale Semiconductor, MC44BC374EJB Datasheet - Page 9

• Manufacturer Part Number: MC44BC374EJB
• Description: IC MODULATOR ANT BOOSTER 24TSSOP
• Manufacturer: Freescale Semiconductor
• Type: Modulatorr

Specifications of MC44BC374EJB

• Applications: Set-Top Boxes
• Mounting Type: Surface Mount
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8 Modulator High Frequency Characteristics
Unless otherwise stated: V
RF inputs/outputs into 75Ohm load. SPECIFICATIONS VALID ONLY FOR ENVELOPE
DEMODULATION.
TVOUT output level
UHF oscillator frequency
VHF range
TVOUT output attenuation
Sound subcarrier harmonics (Fp+n∗Fs) Reference picture carrier.
Second harmonic of chroma subcarrier
Chroma/Sound intermodulation:
Fp + (Fsnd – Fchr)
Fo (picture carrier) harmonics
Out band (picture carrier) spurious
In band spurious (Fo 5MHz)
NOTE 1: Picture carrier harmonics are highly dependant on printed circuit board layout and decoupling capacitors.
78
77
76
75
74
73
72
40
35
30
25
20
15
471 521 571 621 671 721 771 821 871
471 521 571 621 671 721 771 821 871
Parameter
Maximum specification
Figure 3. Typical Performance—Modulator High Frequency
TV Output Le ve l
2Fo Har m onics
Fre que ncy (M hz)
Fre que ncy (M hz )
Minimum specification
cc
Minimum specification
Freescale Semiconductor, Inc.
=5.0 V, Ambient Temperature =25
For More Information On This Product,
MC44BC373/374 Technical Data
Output signal from modulator section.
See Figure 3.
—
From UHF oscillator internally divided.
During transient output inhibit, or
when ATT bit is set to 1. See Figure 3.
Using red EBU bar.
Using red EBU bar.
2nd harmonic: CH21
3rd harmonic: CH21
Other channels: See Figure 3.
See NOTE 1.
1/2∗Fo–1/4∗Fo–3/2∗Fo–3/4∗Fo
From 40MHz to 1GHz.
No video sound modulation.
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Typical
Typical
Test Conditions
45
40
35
30
25
20
15
7 5
7 0
6 5
6 0
5 5
5 0
4 5
Modulator High Frequency Characteristics
471 521 571 621 671 721 771 821 871
47 1 52 1 5 71 62 1 67 1 7 21 7 71 8 2 1 8 71
o
C, Video Input 1V
Minimum specification
T V O u t p u t A t t e n u at io n
3Fo Har m onics
Fr e q u e n c y ( M h z )
Fre que ncy (M hz )
Minimum specification
Typical
Min
460
–65
–65
73
45
50
30
20
—
—
—
74.5
Typ
–63
60
35
26
—
—
—
—
—
0
p-p
, 10-step grayscale.
Typical
Max
880
460
–58
77
10
60
—
—
—
—
—
dBµV
dBµV
MHz
MHz
Unit
dBc
dBc
dBc
dBc
dBc
dBc
Type
B
A
B
B
C
C
C
C
C
C