MAX4397DCTM+T Maxim Integrated Products, MAX4397DCTM+T Datasheet - Page 15

• Manufacturer Part Number: MAX4397DCTM+T
• Description: IC SW A/V SCART CON 48-TQFN
• Manufacturer: Maxim Integrated Products
• Type: Switchr

Specifications of MAX4397DCTM+T

• Applications: DVD, Set-Top Boxes, TV
• Mounting Type: Surface Mount
• Package / Case: 48-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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
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
Figure 5. MAX4397SA Audio Section Features Singled-Ended Encoder Input
Audio/Video Switch for Dual SCART Connectors
L3dB
ENC_INL
VCR_INL
ENC_INR
VCR_INR
TV_INR
TV_INL
). Thus, if f
MUTE IS AN INTERNAL SIGNAL
AUDIO INPUTS
L3dB
2
C-compatible interface (if the ZCD bit
______________________________________________________________________________________
= 1kHz, the time period to wait for
1
/
2
kHz or 0.5ms.
MUTE
MUTE
MUTE
MUTE
-6dB, 0dB, OR +6dB
-6dB, 0dB, OR +6dB
VOLUME CONTROL BYPASS
VOLUME CONTROL BYPASS
Next, set the appropriate TV switches using register
01h. Finally, clear the mute bit (while leaving the ZCD bit
high) using register 00h. The MAX4397DA/SA switch the
signal out of mute at the next zero crossing.
To implement the zero-cross function for TV volume
changes, or for TV and phono volume bypass switch-
ing, simply ensure the ZCD bit in register 00h is set.
VOLUME CONTROL
VOLUME CONTROL
+6dB TO -56dB
+6dB TO -56dB
Σ/2
ZCD
9.54dB
9.54dB
I
2
C
MUTE
MUTE
MUTE
VCR_OUTL
VCR_OUTR
9.54dB
12.54dB
9.54dB
AUDIO OUTPUTS
GNDAUD
TV_OUTL
RF_MONO_OUT
TV_OUTR
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