參數(shù)資料
型號(hào)： MAX9671CTH+T
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 5/44頁(yè)
文件大?。?/td> 0K
描述： IC AUDIO/VIDEO SWIT DUAL 44TQFN
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 2,500
功能： 音頻/視頻切換
電路： 2 x SCART
電壓電源： 單電源
電壓 - 電源，單路/雙路(±)： 3.3 V ~ 12 V
工作溫度： 0°C ~ 70°C
安裝類型： 表面貼裝
封裝/外殼： 44-WFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 44-TQFN-EP（7x7）
包裝： 帶卷 (TR)
配用： MAX9671EVKIT+-ND - EVALUATION KIT FOR MAX9671
MAX9670/MAX9671
Low-Power Audio/Video Switch with Audio
Volume Control for Dual SCART Connectors
______________________________________________________________________________________
13
Detailed Description
The MAX9670/MAX9671 represents Maxim’s third gen-
eration of SCART audio/video (A/V) switches. Under I2C
control, these devices route audio, video, and control
information between the set-top box decoder chip and
two SCART connectors. The audio signals are left audio
and right audio. The video signals are composite video
with blanking and sync (CVBS) and component video
(red, green, blue). S-video (Y/C) can be transported
across the SCART interface if CVBS is reassigned to
luma (Y) and red is reassigned to chroma (C). Support
for S-video is optional. The slow-switch signal and the
fast-switch signal carry control information. The slow-
switch signal is a 12V, three-level signal that indicates
whether the picture aspect ratio is 4:3 or 16:9 or causes
the television to use an internal A/V source such as an
antenna. The fast-switch signal indicates whether the
television should display CVBS or RGB signals.
CVBS, left audio, and right audio are full duplex. All the
other signals are half duplex. Therefore, one device on
the link must be designated as the transmitter, and the
other device must be designated as the receiver.
The low power consumption and the advanced monitor-
ing functions of the MAX9670/MAX9671 enable the cre-
ation of lower power set-top boxes, televisions, and
DVD players. Unlike competing SCART ICs, the audio
and video circuits of the MAX9670/MAX9671 operate
entirely from 3.3V rather than from 5V and 12V. Only the
slow-switch circuit of the MAX9670/MAX9671 requires a
12V supply. The MAX9670/MAX9671 also have circuits
that detect activity on the CVBS inputs, loads on the
CVBS outputs, and the level of the slow-switch signals.
The INT signal informs the microcontroller if there are
any changes so that the microcontroller can intelli-
gently decide whether to power up or power down
the equipment.
In addition, the MAX9670/MAX9671 have DirectDrive
audio circuitry to eliminate click-and-pop noise. With
DirectDrive, the DC bias of the audio line outputs is
always at ground, no matter whether the MAX9670/
MAX9671 are being powered up or powered down.
Conventional audio line output drivers that operate from a
single supply require series AC-coupling capacitors.
During power-up, the DC bias on the AC-coupling capac-
itor moves from ground to a positive voltage, and during
power-down, the opposite occurs. The changing DC bias
usually causes an audible transient.
Pin Description (continued)
PIN
MAX9670
MAX9671
NAME
FUNCTION
28
31
GNDVID
Video Ground
29
32
VCR_R/C_IN
VCR SCART Red/Chroma Video Input
30
33
VVID
Video and Digital Supply. Connect to a 3.3V supply. Bypass with parallel 1F and
0.1F ceramic capacitors to GNDVID. VVID also serves as a digital supply for the
I2C interface.
31
34
ENC_C_IN
Encoder Chroma Video Input
32
35
ENC_R/C_IN
Encoder Red/Chroma Video Input
33
36
TV_R/C_OUT
TV SCART Red/Chroma Video Output
34
37
VCR_R/C_OUT
VCR SCART Red/Chroma Video Output
35
38
VCR_Y/CVBS_OUT VCR SCART Luma/Composite Video Output
36
39
TV_Y/CVBS_OUT
TV SCART Luma/Composite Video Output
37
40
VCR_Y/CVBS_IN
VCR SCART Luma/Composite Video Input
38
41
TV_Y/CVBS_IN
TV SCART Luma/Composite Video Input
39
42
ENC_Y_IN
Encoder Luma Video Input
40
43
ENC_Y/CVBS_IN
Encoder Luma/Composite Video Input
——
EP
Exposed Pad. The exposed pad is the internal ground for the audio amplifiers and
charge pump. A low-impedance connection between ground and EP is required
for proper isolation.
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參數(shù)描述
MAX9671EVKIT+ 功能描述:交換機(jī) IC 開發(fā)工具 Low-Power A/V Switch w/Audio Volume Cntrl RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:USB Power Switches 工具用于評(píng)估:MAX4984E 工作電源電壓:2.8 V to 5.5 V
MAX9672ETI+ 功能描述:LCD Gamma緩沖器 10-Bit Prog Gamma Reference System RoHS:否 制造商:Maxim Integrated 輸入補(bǔ)償電壓: 轉(zhuǎn)換速度: 電源電壓-最大:20 V 電源電壓-最小:9 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-38 封裝:Tube
MAX9672ETI+T 功能描述:LCD Gamma緩沖器 10-Bit Prog Gamma Reference System RoHS:否 制造商:Maxim Integrated 輸入補(bǔ)償電壓: 轉(zhuǎn)換速度: 電源電壓-最大:20 V 電源電壓-最小:9 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-38 封裝:Tube
MAX9672EVKIT+ 功能描述:LCD Gamma緩沖器 Integrated Circuits (ICs) Video Processing - KIT EVALUATION FOR MAX9672 RoHS:否 制造商:Maxim Integrated 輸入補(bǔ)償電壓: 轉(zhuǎn)換速度: 電源電壓-最大:20 V 電源電壓-最小:9 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-38 封裝:Tube
MAX9673ETI+ 功能描述:LCD Gamma緩沖器 10-Bit Prog Gamma Reference System RoHS:否 制造商:Maxim Integrated 輸入補(bǔ)償電壓: 轉(zhuǎn)換速度: 電源電壓-最大:20 V 電源電壓-最小:9 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-38 封裝:Tube
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