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參數(shù)資料
型號(hào): TMDS341APFCR
廠商: TEXAS INSTRUMENTS INC
元件分類(lèi): 多路復(fù)用及模擬開(kāi)關(guān)
英文描述: 3-CHANNEL, AUDIO/VIDEO SWITCH, PQFP80
封裝: GREEN, PLASTIC, TQFP-80
文件頁(yè)數(shù): 14/27頁(yè)
文件大小: 1599K
代理商: TMDS341APFCR
www.ti.com
DDC Signal Path
SLLS702B – MAY 2006 – REVISED MARCH 2007
APPLICATION INFORMATION (continued)
Figure 38. Eye Diagram at Output 10-m 28-AWG Cable
Figure 39. Eye Diagram Recovered by TMDS341A vs TP2
vs TP2 Eye Mask
Eye Mask
Observed I2C bus voltage is dependent on bus resistance, capacitance, and time. The transient bus voltage,
when charging from a low state to a high state, can be calculated using equation (1).
V(t) = VDD(1 – e
–t/RC)
(1)
Where:
t is the time since the charging started
VDD is the pull-up termination voltage
R is the total resistance on the I2C link
C is the total capacitance on the I2C link
In the I2C bus specification, version 2.1, the high-level threshold voltage is VIH = 0.7 VDD, and the low-level
threshold voltage is VIL = 0.3 VDD.
From equation (1), the times to charge from a bus voltage of 0 V to the VIH and VIL levels are:
tIH = 1.204 × RC
tIL = 0.357 × RC
The bus rise time (from 0.3 VDD to 0.7 VDD) is then given by equation (2):
tr(30-70) = tIH– tIL = 0.847 × RC
(2)
The TMDS341A can be easily applied in stand-alone switch boxes and digital displays. The following sections
show the bus lengths that can be supported in each case.
Maximum Bus Lengths for Switch Applications
Figure 40 shows the TMDS341A being used as a stand-alone switch. Both pull-up resistors are decided by the
source and sink equipment. A 1.5-k
resistor at the source and a 47-k resistor at the sink are recommended.
21
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TMDS341APFCRG4 功能描述:視頻開(kāi)關(guān) IC 3-TO-1 DVI/HDMI Sw RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)數(shù)量:4 開(kāi)啟電阻(最大值):12 Ohms 傳播延遲時(shí)間: 開(kāi)啟時(shí)間(最大值): 關(guān)閉時(shí)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(kāi)關(guān) IC 3-TO1 DVI/HDMI SWITCH RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 開(kāi)關(guān)數(shù)量:4 開(kāi)啟電阻(最大值):7 Ohms 開(kāi)啟時(shí)間(最大值): 關(guān)閉時(shí)間(最大值): 傳播延遲時(shí)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(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16
TMDS341PFCG4 功能描述:視頻開(kāi)關(guān) IC 3-TO1 DVI/HDMI SWITCH RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)數(shù)量:4 開(kāi)啟電阻(最大值):12 Ohms 傳播延遲時(shí)間: 開(kāi)啟時(shí)間(最大值): 關(guān)閉時(shí)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(kāi)關(guān) IC 3-TO1 DVI/HDMI SWITCH RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)數(shù)量:4 開(kāi)啟電阻(最大值):12 Ohms 傳播延遲時(shí)間: 開(kāi)啟時(shí)間(最大值): 關(guān)閉時(shí)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(kāi)關(guān) IC 3-TO1 DVI/HDMI SWITCH RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)數(shù)量:4 開(kāi)啟電阻(最大值):12 Ohms 傳播延遲時(shí)間: 開(kāi)啟時(shí)間(最大值): 關(guān)閉時(shí)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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