MAX4397DCTM+T Maxim Integrated Products, MAX4397DCTM+T Datasheet - Page 10

• 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

Audio/Video Switch for Dual SCART Connectors
The MAX4397DA/SA are switch matrices that route
audio and video signals between different ports using
the I
decoder output, and two SCART connectors for the TV
and VCR. Per EN50049 and IEC 933, the encoder can
only input a signal to the SCART connector, while TV
and VCR SCART connectors are bidirectional.
The MAX4397DA/SA circuitry consists of four major
sections: the video section, the audio section, the slow-
and fast-switching section, and the digital interface.
The video section consists of clamp and bias circuitry,
input buffers, reconstruction filters, a switch matrix, a Y/C
mixer, and output buffers. All video inputs are AC-cou-
pled through a 0.1µF capacitor to set an acceptable DC
10
MAX4397DA MAX4397SA
______________________________________________________________________________________
2
EP
29
30
31
32
33
34
35
37
38
39
40
41
42
43
44
45
46
47
48
C interface. The ports consist of the MPEG
PIN
29
30
31
32
33
34
35
37
38
39
40
41
42
43
44
45
46
47
48
EP
Detailed Description
VCR_Y/CVBS_OUT
TV_Y/CVBS_OUT
VCR_Y/CVBS_IN
ENC_Y/CVBS_IN
RF_CVBS_OUT
VCR_R/C_OUT
TV_Y/CVBS_IN
TV_R/C_OUT
VCR_R/C_IN
ENC_R/C_IN
TV_G_OUT
TV_B_OUT
TV_R/C_IN
VCR_G_IN
ENC_G_IN
ENC_C_IN
VCR_B_IN
ENC_B_IN
ENC_Y_IN
GNDAUD
NAME
RF Modulator Composite Video Output. Internally biased at 1V.
TV SCART Luma/Composite Video Output. Internally biased at 1V.
TV SCART Red/Chroma Video Output. Internally biased at 1V for Red video
signal and 2.2V for Chroma video signal.
TV SCART Green Video Output. Internally biased at 1V.
TV SCART Blue Video Output. Internally biased at 1V.
VCR SCART Luma/Composite Video Output. Internally biased at 1V.
VCR SCART Red/Chroma Video Output. Internally biased at 1V for Red video
signals and 2.2V for Chroma video signal.
TV SCART Red/Chroma Video Input. Internally biased at 1.2V for Red video
signals, or 1.9V for Chroma video signals.
TV SCART Luma/Composite Video Input. Internally biased at 1.2V.
VCR SCART Luma/Composite Video Input. Internally biased at 1.2V.
VCR SCART Red/Chroma Video Input. Internally biased at 1.2V for Red video
signals and 1.9V for Chroma video signals.
VCR SCART Green Video Input. Internally biased at 1.2V.
VCR SCART Blue Video Input. Internally biased at 1.2V.
Digital Encoder Luma/Composite Video Input. Internally biased at 1.2V.
Digital Encoder Red/Chroma Video Input. Internally biased at 1.2V for Red
video signals, or 1.9V for Chroma video signals.
Digital Encoder Green Video Input. Internally biased at 1.2V.
Digital Encoder Blue Video Input. Internally biased at 1.2V.
Digital Encoder Luma Video Input. Internally biased at 1.2V.
Digital Encoder Chroma Video Input. Internally biased at 1.9V.
Exposed Paddle. Solder to the circuit board ground (GNDAUD) for proper
thermal and electrical performance.
level using clamp or bias networks. The bidirectional
Red/Chroma outputs can be connected to ground using
I
is an input (see the Video Inputs section).
The audio section features an input buffer, a switching
matrix, volume- or gain-control circuitry, and output dri-
vers. The audio inputs are AC-coupled through a 0.1µF
capacitor. Only the audio encoder inputs of the
MAX4397DA are different from the MAX4397SA. The
MAX4397SA has a single-ended audio encoder input
while the audio encoder input for the MAX4397DA is dif-
ferential. The TV output audio path has volume control
from -56dB to +6dB in 2dB steps, while the VCR output
audio path has volume control from -6dB to +6dB in 6dB
steps. The MAX4397DA/SA can be configured to switch
inputs during a zero-crossing function to reduce clicks.
2
C control to make them terminations when Red/Chroma
Pin Description (continued)
FUNCTION