MAX9670CTL+T Maxim Integrated Products, MAX9670CTL+T Datasheet - Page 14

• Manufacturer Part Number: MAX9670CTL+T
• Description: IC AUDIO/VIDEO SWIT DUAL 40TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX9670CTL+T

• Function: Audio/Video Switch
• Circuit: 2 x SCART
• Voltage Supply Source: Single Supply
• Voltage - Supply, Single/dual (±): 3.3 V ~ 12 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 40-WFQFN Exposed Pad
• For Use With: MAX9670EVKIT+ - EVALUATION KIT FOR MAX9670
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Low-Power Audio/Video Switch with Audio
Volume Control for Dual SCART Connectors
The MAX9670 audio circuit is essentially a stereo,
2-by-2, nonblocking, audio crosspoint with output dri-
vers. The encoder (stereo audio DAC) and the VCR are
the two input sources, and the two outputs go to the TV
SCART connector and the VCR SCART connector. See
Figure 1. The MAX9671 audio circuit is similar to that of
the MAX9670 except that it is a stereo, 3-by-2,
Figure 1. MAX9670/MAX9671 Audio Section Functional Diagram
14
______________________________________________________________________________________
DEV_ADDR
ENC_INR
VCR_INR
ENC_INL
VCR_INL
*TV_INR
*TV_INL
CPVSS
V
SDA
C1N
SCL
C1P
AUD
EP
(0.5V
RMS
*MAX9671 ONLY.
Audio Section
FULL-SCALE INPUT)
MUTE
MUTE
MUTE
MUTE
nonblocking audio crosspoint with TV as the third input
source.
The integrated charge pump inverts the +3.3V supply
to create a -3.3V supply. The audio circuit operates
from bipolar supplies so the audio signal is always
biased to ground.
0dB TO -62dB
0dB TO -62dB
CONTROL
CONTROL
REGISTER
CONTROL
VOLUME
VOLUME
CHARGE
ZCD
PUMP
MUTE
MUTE
MAX9670/MAX9671
(2V
(2V
RMS
RMS
FULL-SCALE OUTPUT)
FULL-SCALE OUTPUT)
x4
x4
x4
x4
TV_OUTL
TV_OUTR
VCR_OUTL
VCR_OUTR