Audio/Video Switches. MAX9670 Datasheet

MAX9670 Switches. Datasheet pdf. Equivalent

Part MAX9670
Description (MAX9670 / MAX9671) Low-Power Audio/Video Switches
Feature 19-4653; Rev 0; 7/09 KIT ATION www.DataSheet4U.com EVALU E L B AVAILA Low-Power Audio/Video Switch.
Manufacture Maxim Integrated Products
Datasheet
Download MAX9670 Datasheet




MAX9670
19-4653; Rev 2; 12/10
EVAALVUAAILTAIOBNLEKIT
Low-Power Audio/Video Switch with Audio
Volume Control for Dual SCART Connectors
General Description
The MAX9670/MAX9671 dual SCART matrices route
audio and video signals between a set-top box
decoder chip and two external SCART connectors
under I2C control. Operating from a 3.3V supply and a
12V supply, the MAX9670/MAX9671 consume 66mW
during quiescent operation and 300mW during average
operation when driving typical signals into typical
loads. Video input detection, video load detection, and
a 2.8mW standby mode facilitate the design of intelli-
gent, low-power set-top boxes.
The MAX9670/MAX9671 audio section contains a
buffered crosspoint to route audio inputs to audio out-
puts and programmable volume control from -62dB to
0dB in 2dB steps. The DirectDrive® output amplifiers
create a 2VRMS full-scale audio signal biased around
ground, eliminating the need for bulky output capaci-
tors and reducing click-and-pop noise. The zero-cross
detection circuitry also further reduces clicks and pops
by enabling audio sources to switch only during a zero-
crossing. The MAX9671 offers TV left and right audio
inputs.
The MAX9670/MAX9671 video section contains a
buffered crosspoint to route video inputs to video out-
puts. The standard-definition video signals from the set-
top box decoder chip are lowpass filtered to remove
out-of-band artifacts.
The MAX9670/MAX9671 also support slow-switching
and fast-switching signals. An interrupt signal from the
MAX9670/MAX9671 informs the microcontroller when
the system status has changed.
Applications
Set-Top Boxes
TVs
DVD Players
Typical Application Circuit appears at end of data sheet.
DirectDrive is a registered trademark of Maxim Integrated
Products, Inc.
Features
o 66mW Quiescent Power Consumption
o 2.8mW Standby Mode Consumption
o Programmable Audio Gain Control of -62dB to
0dB (TV Audio Outputs)
o Clickless, Popless, DirectDrive Audio
o Video Input and Video Load Detection
o Video Reconstruction Filter with 10MHz Passband
and 52dB Attenuation at 27MHz
o 3.3V and 12V Supply Voltages
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
TV R+L
AUDIO
INPUTS
MAX9670CTL+ 0°C to +70°C 40 TQFN-EP*
MAX9671CTH+ 0°C to +70°C 44 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
No
Yes
System Block Diagram
V12
12V
VVID VAUD
3.3V 3.3V
STB CHIP
µC
I2C
INTERRUPT
OUTPUT
MAX9670/MAX9671
I2C INTERFACE
REGISTERS AND
ACTIVITY
MONITOR
VIDEO
RGB, Y/C, CVBS
ENCODER
VIDEO FILTERS AND
CROSSPOINT
RGB, Y/C, CVBS
CVBS
L/R AUDIO
(MAX9671 ONLY)
L/R AUDIO
(MAX9670 ONLY)
SLOW SWITCHING
FAST SWITCHING
TV
SCART
STEREO
AUDIO
DAC
SINGLE-ENDED R/L
STEREO AUDIO
AUDIO CROSSPOINT
WITH DIRECTDRIVE
OUTPUTS, VOLUME
CONTROL
SLOW SWITCHING
FAST SWITCHING
Y/C, CVBS
RGB, Y/C, CVBS
L/R AUDIO
SLOW SWITCHING
FAST SWITCHING
VCR
SCART
CHARGE PUMP
EP GNDVID
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.



MAX9670
Low-Power Audio/Video Switch with Audio
Volume Control for Dual SCART Connectors
ABSOLUTE MAXIMUM RATINGS
VVID to GNDVID........................................................-0.3V to +4V
V12 to EP.................................................................-0.3V to +14V
VAUD to EP ...............................................................-0.3V to +4V
EP to GNDVID .......................................................-0.1V to +0.1V
All Video Inputs, VCRIN_FS to GNDVID...................-0.3V to +4V
All Audio Inputs to EP .......................................-1V to (VEP + 1V)
SDA, SCL, DEV_ADDR, INT to GNDVID ..................-0.3V to +4V
TV_SS, VCR_SS to EP .................................-0.3V to (V12 + 0.3V)
Current
All Video/Audio Inputs ...................................................±20mA
C1P, C1N, CPVSS .........................................................±50mA
Output Short-Circuit Current Duration
Video and Fast-Switching Outputs to VVID,
GNDVID.................................................................Continuous
Audio Outputs to VAUD, EP .....................................Continuous
TV_SS, VCR_SS to V12, EP......................................Continuous
Continuous Power Dissipation (TA = +70°C)
40-Pin TQFN-EP (derate 26.3mW/°C above +70°C) ...2105.3mW
44-Pin TQFN-EP (derate 26.3mW/°C above +70°C)...2222.2mW
Junction-to-Case Thermal Resistance (θJC) (Note 1)
40/44-pin TQFN-EP .........................................................1°C/W
Junction-to-Ambient Thermal Resistance (θJA) (Note 1)
40/44-pin TQFN-EP .......................................................27°C/W
Operating Temperature Range...............................0°C to +70°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
Note 1: Package thermal resistance were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V12 = 12V, VVID = VAUD = 3.3V, VGNDVID = VEP = 0V, no load, TA = 0°C to +70°C, unless otherwise noted. Typical values are at
TA = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Video Supply Voltage Range
VVID
Inferred from video PSRR test at 3V and
3.6V
3 3.3 3.6 V
Audio Supply Voltage Range
V12 Supply Voltage Range
VVID Quiescent Supply Current
VAUD Quiescent Supply Current
V12 Quiescent Supply Current
VIDEO CHARACTERISTICS
DC-COUPLED INPUT
Input Voltage Range
Input Current
Input Resistance
VAUD
Inferred from audio PSRR test at 3V and
3.6V
3 3.3 3.6
V12 Inferred from slow-switching levels
11.4 12 12.6
IVID_Q
Normal operation; all video output
amplifiers are enabled and muted (Note 3)
Standby mode, slow switch inputs low
16 30
1500
Shutdown
35
IAUD_Q
Normal operation (Note 3)
Shutdown
3.2 6
35
I12_Q
Normal operation
(Note 3)
Slow-switching output
set to low-level
Slow-switching output
set to medium-level
0.3 100
475
Shutdown, TA = +25°C
10
V
V
mA
µA
mA
µA
µA
µA
RL = 75to
VVID = 3V
VIN
GNDVID or 150
to VVID/2; inferred
VVID = 3.135V
from gain test
VVID = 3.3V
IIN VIN = 0.3V, TA = +25°C
RIN
1.15
1.3
1
300
1.15
2
VP-P
µA
k
2 _______________________________________________________________________________________







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