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參數(shù)資料
| 型號： | ISL54105ACRZ |
| 廠商： | Intersil |
| 文件頁數(shù)： | 3/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TMDS REGENERATOR 72-QFN |
| 標準包裝： | 1,680 |
| 應(yīng)用： | 多媒體顯示器，測試設(shè)備 |
| 接口： | I²C |
| 電源電壓： | 3 V ~ 3.6 V |
| 封裝/外殼： | 72-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 72-QFN（10x10） |
| 包裝： | 托盤 |
| 安裝類型： | 表面貼裝 |
11
FN6716.0
June 4, 2008
drawing current from the external TMDS receiver it is
attached to.
This is non-ideal and can cause the ISL54105A to fail HDMI
Compliance Test 7-3 (“VOFF”). VOFF is the voltage across
each 50
Ω Rx
N resistor when the power is removed from the
device containing the ISL54105A.
To prevent this leakage current, insert a Schottky diode
between the VD power net and the VD_ESD pins as shown
in Figure 9. With the addition of this diode the system will
pass compliance test 7-3.
Inter-Pair (Channel-to-Channel) Skew
The read pointers for Channel 0, 1, and 2 of the FIFO that
follows the CDR all have the same clock, so all 3 channels
transition within a few picoseconds of each other - there is
essentially no skew between the transitions of the three
channels.
However the FIFO read pointers may be positioned up to 2
bits apart relative to each other, introducing a random, fixed
channel-to-channel skew of skew of 1 or (much less
frequently) 2 bits. The random skew is introduced whenever
there is a discontinuity in the input signal (typically a video
mode change or a new mux channel selection). After the
CDRs and PLL lock, the skew is fixed until the next
discontinuity. This adds up to 2 bits of skew in addition to any
incoming skew, as shown in the following examples.
Figure 10 shows an input (the top three signals) with
essentially no skew. After the ISL54105A locks on to the
signal, there may be 1 bit of skew on the output, as shown in
When there is pre-existing skew on the input, the ISL54105A
can add up to 2 bits to the channel-to-channel skew. In the
example in Figure 11, the incoming red channel has 2.3 bits
of skew relative to the incoming green and blue. The FIFO’s
quantization (worst case) increases the total skew to 4.0 bits.
While increasing skew is not desirable, DVI and HDMI
receivers are required to have a minimum of 6 bits of inter-
pair skew tolerance, so the addition of 2 bits of skew is only a
problem with the most pathological cables and transmitters.
It does, however, limit the number of ISL54105As that can
be put in series (although statistically it is unlikely that all the
skews would line up in a worst-case configuration).
FIGURE 8. ISL54105A ESD PROTECTION DIODES
ISL54105A
VD
VD_ESD
(41, 53)
3.3VTX
TxN
Tx
3.3VRX
50
RxN
FIGURE 9. SCHOTTKY DIODE MODIFICATION
ISL54105A
VD
VD_ESD
(41, 53)
3.3VTX
TxN
Tx
3.3VRX
50
RxN
D1
C1
0.1
μF
FIGURE 10. MAXIMUM ADDITIONAL INTERCHANNEL SKEW
FOR INPUTS WITH NO OR LITTLE SKEW
Bit 4
Bit 5
Bit 6
Bit 7
Bit 0
Bit 1
Bit 2
Bit 3
B
Bit 8
Bit 9
Bit 4
Bit 5
Bit 6
Bit 7
Bit 0
Bit 1
Bit 2
Bit 3
B
Bit 8
Bit 9
Bit 4
Bit 5
Bit 6
Bit 7
Bit 0
Bit 1
Bit 2
Bit 3
B
Bit 8
Bit 9
Bit 4
Bit 5
Bit 6
Bit 0
Bit 1
Bit 2
Bit 3
B
Bit 7
Bit 8
Bit 9
Bit 4
Bit 5
Bit 6
Bit 7
Bit 0
Bit 1
Bit 2
Bit 3
B
Bit 8
Bit 9
Bit 4
Bit 5
Bit 6
Bit 7
Bit 0
Bit 1
Bit 2
Bit 3
B
Bit 8
Bit 9
INPUT SKEW
(none, in this
example)
OUTPUT SKEW
(1 bit – 615ps at
162.5Mpixels/s)
FIGURE 11. MAXIMUM ADDITIONAL INTERCHANNEL SKEW
FOR INPUTS WITH MODERATE TO LARGE
SKEW
Bit 4
Bit 5
Bit 0
Bit 1
Bit 2
Bit 3
Bit 7
Bit 8
Bit 9
Bit 4
Bit 5
Bit 6
Bit 7
Bit 0
Bit 1
Bit 2
Bit 3
Bit 7
Bit 8
Bit 9
Bit 4
Bit 5
Bit 6
Bit 7
Bit 0
Bit 1
Bit 2
Bit 3
Bit 7
Bit 8
Bit 9
Bit 4
Bit 0
Bit 1
Bit 2
Bit 3
Bit 6
Bit 7
Bit 8
Bit 9
Bit 4
Bit 5
Bit 6
Bit 7
Bit 0
Bit 1
Bit 2
Bit 3
Bit 7
Bit 8
Bit 9
Bit 4
Bit 5
Bit 6
Bit 7
Bit 0
Bit 1
Bit 2
Bit 3
Bit 8
Bit 9
INPUT SKEW
(2.3 bits/1.4ns
in this example)
OUTPUT SKEW
(4 bits/2.5ns at
162.5Mpixels/s)
Bit 5
Bit 6
Bit 4
Bit 5
Bit 8
ISL54105A
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL54105ACRZ-EVALZ | 功能描述:EVAL BOARD FOR ISL54105ACRZ RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估演示板和套件 系列:* 標準包裝:1 系列:PCI Express® (PCIe) 主要目的:接口，收發(fā)器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要屬性:- 次要屬性:- 已供物品:板 |
| ISL54105CRZ | 功能描述:IC TMDS REGENERATOR 72-QFN RoHS:是 類別:集成電路 (IC) >> 接口 - 專用 系列:- 標準包裝:3,000 系列:- 應(yīng)用:PDA，便攜式音頻/視頻，智能電話 接口:I²C，2 線串口 電源電壓:1.65 V ~ 3.6 V 封裝/外殼:24-WQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) 安裝類型:表面貼裝 產(chǎn)品目錄頁面:1015 (CN2011-ZH PDF) 其它名稱:296-25223-2 |
| ISL54105CRZ-EVALZ | 制造商:Intersil Corporation 功能描述:ISL54105CRZ EVALUATION BOARD, ROHS - Bulk |
| ISL54106ACRZ | 功能描述:IC TMDS REGENERATOR MUX RoHS:是 類別:集成電路 (IC) >> 接口 - 專用 系列:- 標準包裝:3,000 系列:- 應(yīng)用:PDA，便攜式音頻/視頻，智能電話 接口:I²C，2 線串口 電源電壓:1.65 V ~ 3.6 V 封裝/外殼:24-WQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) 安裝類型:表面貼裝 產(chǎn)品目錄頁面:1015 (CN2011-ZH PDF) 其它名稱:296-25223-2 |
| ISL54106CRZ | 功能描述:IC TMDS REGENERATOR MUX RoHS:是 類別:集成電路 (IC) >> 接口 - 專用 系列:- 標準包裝:3,000 系列:- 應(yīng)用:PDA，便攜式音頻/視頻，智能電話 接口:I²C，2 線串口 電源電壓:1.65 V ~ 3.6 V 封裝/外殼:24-WQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) 安裝類型:表面貼裝 產(chǎn)品目錄頁面:1015 (CN2011-ZH PDF) 其它名稱:296-25223-2 |
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