MAX4397 MAXIM [Maxim Integrated Products], MAX4397 Datasheet - Page 15

• Manufacturer Part Number: MAX4397
• Description: Audio/Video Switch For Dual SCART Connectors
• Manufacturer: MAXIM [Maxim Integrated Products]

To implement the zero-crossing function when switch-
ing audio signals, set the ZCD bit by loading register
00h through the I
is not already set). Then set the mute bit low by loading
register 00h. Next, wait for a sufficient period of time for
Figure 4. MAX4397S Audio Section Features Singled-Ended Encoder Input
Audio/Video Switch for Dual SCART Connectors
ENC_INL
VCR_INL
ENC_INR
VCR_INR
TV_INR
TV_INL
MUTE IS AN INTERNAL SIGNAL
AUDIO INPUTS
2
C-compatible interface (if the ZCD bit
______________________________________________________________________________________
MUTE
MUTE
MUTE
MUTE
-6dB, 0dB, OR +6dB
-6dB, 0dB, OR +6dB
VOLUME CONTROL BYPASS
VOLUME CONTROL BYPASS
VOLUME CONTROL
VOLUME CONTROL
the audio signal to cross zero. This period is a function
of the audio signal path’s low-frequency 3dB corner
(f
a zero-crossing detect is
+6dB TO -56dB
+6dB TO -56dB
L3dB
). Thus, if f
Σ/2
ZCD
9.54dB
9.54dB
L3dB
I
2
C
= 1kHz, the time period to wait for
MUTE
MUTE
MUTE
VCR_OUTL
VCR_OUTR
1
/
2
kHz or 0.5ms.
9.54dB
12.54dB
9.54dB
AUDIO OUTPUTS
GNDAUD
TV_OUTL
RF_MONO_OUT
TV_OUTR
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