MC44BC374EJB Freescale Semiconductor, MC44BC374EJB Datasheet - Page 11

• 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

10 Audio Characteristics
Unless otherwise stated: V
grayscale. RF inputs/outputs into 75Ohm load. SPECIFICATIONS VALID ONLY FOR ENVELOPE
DEMODULATION.
Picture-to-Sound ratio
Audio modulation depth
Audio input resistance
Audio Frequency response
Audio Distortion FM (THD only)
Audio Distortion AM (THD only)
Audio S/N with Sync Buzz FM
Audio S/N with Sync Buzz AM
Parameter
cc
Freescale Semiconductor, Inc.
= 5.0 V, Ambient Temperature = 25
For More Information On This Product,
PS bit set to 0.
PS bit set to 1.
Using specific pre-emphasis circuit,
audio input level=205mVrms–audio frequency=1kHz
AM modulation: SECAM Fs=6.5MHz
FM modulation: Fs=5.5, 6 or 6.5MHz
100% modulation=±50kHz FM deviation
FM modulation: NTSC Fs=4.5MHz
100% modulation=±25kHz FM deviation
—
Reference 0dB at 1kHz,
using specified pre-emphasis circuit,
measure from 50Hz to 15kHz.
At 1kHz, 100% modulation (±50kHz).
No video.
At 1kHz, 100% modulation.
No video.
Video input EBU color bar 75%.
Weighting filter CCIR 468-2.
Reference 1kHz, 85% modulation.
Video input EBU color bar 75%.
Audio BW from 40Hz to 15kHz.
Weighting filter CCIR 468-2.
Figure 5. Typical performance—Audio
58
56
54
52
50
48
46
471 521 571 621 671 721 771 821 871
MC44BC373/374 Technical Data
Go to: www.freescale.com
Typical
Test Conditions
Audio Signal to Noise
Frequency (Mhz)
Minimum specification
o
C, Video Input 1V
–2.5
Min
13
65
65
65
45
48
45
—
—
9
Typ
0.4
1.5
16
12
80
80
80
53
53
50
—
Audio Characteristics
p-p
Max
2.5
+2
19
15
95
95
95
61
—
—
2
, 10-step
Unit
KΩ
dB
dB
dB
dB
%
%
%
%
%
Type
B
B
B
B
A
C
C
D
C
D