mc44bc375u Freescale Semiconductor, Inc, mc44bc375u Datasheet - Page 7

• Manufacturer Part Number: mc44bc375u
• Description: Pll Tuned Vhf Channel 3 / 4 Audio / Video Modulator
• Manufacturer: Freescale Semiconductor, Inc

Application Specific Products
Freescale Semiconductor
Table 8. Audio Performance Characteristics
Picture-to-Sound ratio
Picture to Sound ratio difference
Audio modulation depth
Audio input resistance
Audio Frequency response
Audio Distortion FM (THD only)
Audio S/N with Sync Buzz FM
1. See Performance Measurement Test Set-ups,
Parameter
PSS pin = High
PSS pin = Low
between PSS = HI and PSS = LO
Using specific pre-emphasis circuit, Audio input = 1.0 KHz @ 205 mVrms
Fs = 4.5 MHz
(100% modulation = ±25 KHz FM deviation)
Fs = 5.5 MHz
(100% modulation = ±50 KHz FM deviation)
Reference 0 dB at 1.0 KHz,
Measure from 50 Hz to 15 KHz
Depends on loop filter components
At 1.0 KHz, 100% modulation (±50 KHz) No video
Table
Test Conditions
9.
(1)
Min
-2.5
1.5
14
12
75
75
45
—
50
Typ
2.0
0.3
16
14
85
85
55
53
—
Max
+2.0
2.5
1.0
18
14
95
95
61
—
Unit
KΩ
dB
dB
dB
dB
%
%
%
MC44BC375U
Type
B
B
B
B
A
C
C
C
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