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參數資料
| 型號： | TMDS341APFCR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 多路復用及模擬開關 |
| 英文描述： | 3-CHANNEL, AUDIO/VIDEO SWITCH, PQFP80 |
| 封裝： | GREEN, PLASTIC, TQFP-80 |
| 文件頁數： | 15/27頁 |
| 文件大小： | 1599K |
| 代理商： | TMDS341APFCR |
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SDAn
Switch Box
TMDS341A
SDA_Sink
VDDsink
Rupsink
Csink
Ccable2
CO
CI
Ccable1
Csource
VDDsource
Rupsource
Source
Sink
Csource
Sink
TMDS341A
SDA_Sink
SDAn
Source
Ccable
Csink
DVI/HDMI RX
VDDsource
Rupsource
VDDsink
Rupsink
SLLS702B – MAY 2006 – REVISED MARCH 2007
APPLICATION INFORMATION (continued)
Figure 40. DDC Link from Source to Sink With External Switch Box
Rupsource = 1.5-k pull-up to 5 V
Rupsink = 47-k pull-up to 5 V
Rtotal = Rupsource // Rupsink = 1.45 k
Ctotal = Csource // Ccable1 // Ci // Co // Ccable2 // Csink
For standard mode I2C, the frequency is at 100 kHz, and the transition time must be less than 1 s. The total
allowable capacitance, C
total, is then 814-pF. Csource and Csink are limited by the HDMI specification to 50 pF.
C
i/o for the TMDS341A is 10 pF max. The total capacitance from DVI or HDMI cables, Ccable1 and Ccable2,
should then be less than 704 pF.
Typical capacitance is 200 pF for a 28-AWG 5-m HDMI cable and 300 pF for a 28-AWG 5-m DVI cable. The
recommended total cable length is the length of cable 1, Lcable1, plus the length of cable 2, Lcable2. For a
28-AWG DVI cable, the total cable length is 11 m; and for a 28-AWG HDMI cable, the total cable length is 17
m.
This calculation is applicable to VIH ≤ Vpass.
Maximum Bus Lengths for DTV Applications
Figure 41 shows the TMDS341A being used as a switch in a DTV and being placed on the same PCB board as
the DVI/HDMI receiver. Unlike Figure 40, the output connector of the TMDS341A stand-alone switch and the
input connector of the sink are removed, which results in a lower capacitance in the DDC link and eliminates the
impedance discontinuity. However, the capacitance of the removed connectors is relatively small, relative to the
total allowable capacitance. The results from the previous section Maximum Bus Lengths for Switch Applications
can be reused if the pull-up resistors and capacitances have the same values. The recommended total cable
length is the length from source to sink.
Figure 41. DDC Link From Source to Sink Without External Switch Box
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TMDS341APFCRG4 | 功能描述:視頻開關 IC 3-TO-1 DVI/HDMI Sw RoHS:否 制造商:Texas Instruments 開關數量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時間: 開啟時間（最大值）: 關閉時間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
| TMDS341PFC | 功能描述:多路器開關 IC 3-TO1 DVI/HDMI SWITCH RoHS:否 制造商:Texas Instruments 通道數量:1 開關數量:4 開啟電阻（最大值）:7 Ohms 開啟時間（最大值）: 關閉時間（最大值）: 傳播延遲時間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UQFN-16 |
| TMDS341PFCG4 | 功能描述:視頻開關 IC 3-TO1 DVI/HDMI SWITCH RoHS:否 制造商:Texas Instruments 開關數量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時間: 開啟時間（最大值）: 關閉時間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
| TMDS341PFCR | 功能描述:視頻開關 IC 3-TO1 DVI/HDMI SWITCH RoHS:否 制造商:Texas Instruments 開關數量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時間: 開啟時間（最大值）: 關閉時間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
| TMDS341PFCRG4 | 功能描述:視頻開關 IC 3-TO1 DVI/HDMI SWITCH RoHS:否 制造商:Texas Instruments 開關數量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時間: 開啟時間（最大值）: 關閉時間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
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