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參數(shù)資料
| 型號： | TMDS442PNPG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP128 |
| 封裝： | GREEN, PLASTIC, TQFP-128 |
| 文件頁數(shù)： | 28/45頁 |
| 文件大?。?/td> | 1977K |
| 代理商： | TMDS442PNPG4 |
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I
2C Behavior
Master
Slave
DriverR
Driver T
V
Rdd
R
Rup
C
CABLE
C
SOURCE
C
I
C
O
C
slave
V
Tdd
R
Tup
C
medium
SLLS757A – AUGUST 2006 – REVISED MARCH 2007
When GE sets high, or GE sets low and 5V_EN sets high, the EN signal is the AND result of the 5V_PWR and
the I2CEN. When GE sets low and 5V_EN sets low, the EN signals follows the status of I2CEN. See Table 5.
Table 5. Truth Table for the EN Signal of the I2C Driver
GE
5V_EN(1)
5V_PWR
I2CEN
EN
1
X
1
X
1
0
1
X
0
1
0
1
X
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
(1)
X is 1 or 0
The I2CEN pin is active-high with an internal pull-up to VCC. It can be used to isolate a badly behaved slave
during powering up. It should never change state during an I2C operation because disabling during a bus
operation may hang the bus and enabling part way through a bus cycle could confuse the I2C parts being
enabled.
The typical application of the TMDS442 is as a repeater in a TV connecting the HDMI input connector and an
internal HDMI Rx through flat cables. The I2C repeater is 5-V tolerant, and no additional circuitry is required to
translate between 3.3-V to 5-V bus voltages. In the following example, the system master is running on an R-side
I2C-bus while the slave is connected to a T-side bus. Both buses run at 100 kHz supporting standard-mode I2C
operation. Master devices can be placed on either bus.
Figure 36. Typical Application
Figure 37 illustrates the waveforms seen on the R-side I2C-bus when the master writes to the slave through the
I2C repeater circuit of the TMDS442. This looks like a normal I2C transmission, and the turn on and turn off of the
acknowledge signals are slightly delayed.
34
Copyright 2006–2007, Texas Instruments Incorporated
Product Folder Link(s): TMDS442
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TMDS442PNPR | 功能描述:視頻開關(guān) IC 4-to-2 DVI/HDMI Sw Pwr I/O Exp RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)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(guān)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 |
| TMDS442PNPRG4 | 功能描述:視頻開關(guān) IC 4-to-2 DVI/HDMI Sw Pwr I/O Exp RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)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(guān)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 |
| TMDS461 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:1080p a?? Deep Color 4-to-1 HDMI/DVI Switch with Adaptive Equalization |
| TMDS461PZT | 功能描述:視頻開關(guān) IC 4 to 1 HDMI Switch RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)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(guān)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 |
| TMDS461PZTR | 功能描述:視頻開關(guān) IC 4 to 1 HDMI Switch RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)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(guān)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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