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| 型號(hào)： | ISL59450IQZ |
| 廠商： | Intersil |
| 文件頁數(shù)： | 14/37頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC SWITCH VID CRSSPNT 128-MQFP |
| 標(biāo)準(zhǔn)包裝： | 66 |
| 系列： | * |
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21
FN7510.0
February 14, 2008
Functional Description
Signal Muxes
The ISL59450 accepts 6 composite, 4 S-video and 4
component video sources. Each signal type is routed into a
crosspoint mux with two outputs. The 6 composite signals
are routed into a 6:2 mux, the S-video inputs are routed into
a double 4:2 mux and the component video signals are
routed into a triple 4:2 mux. Each mux is controlled through
the I2C interface.
Each signal type has two dedicated outputs, A and B. Signal
types cannot be routed to different signal type outputs. For
example, an S-video signal (Y, C) cannot be routed to the
composite outputs.
For the luma (Y and CVBS) channels, the DC-restore
function is either a standard sync-tip clamp (Master Mode) or
slaved to a clamp signal generated from the sync separator
(Slave Mode).
For the chroma (C and Pr/Pb) channels, the DC-restore
function is a keyed clamp timed to the luma channel (Master
Mode) or timed to a clamp signal generated from the sync
separator (Slave Mode).
The clamping circuit restores the AC-coupled video signal to
a fixed DC level (VTIP, or VLUMA). The clamping circuit
provides line-by-line restoration of the video sync level to a
the selected DC reference voltage during the sync tip.
Clamp Modes
The ISL59450 has two clamp modes: master and slave. Each
output group can operate in either mode. In master mode, sync
timing is derived directly from the video signal and video levels
are clamped using this internal sync signal. In slave mode,
video sync is derived from the input groups corresponding sync
separator (A or B) or an external source connected to the
corresponding sync separator. In the slave mode, the sync
timing can come from HSYNCIN and VSYNCIN or it can be
derived from the sync timing on the active video on the
composite, S-video, or component channels (see “Sync
Separator Block Diagram” on page 9). In the slave mode,
clamping occurs during the sync tip of the selected video signal
or the HSYNC signal (external HSYNC input).
Filters
The ISL59450 has integrated anti-aliasing/smoothing filters
for SD and HD video signals. For the Composite Video
signals, the user can use a 7MHz low pass filter or bypass it
(40MHz bandwidth). S-video signals have an 10MHz filter
with bypass (43MHz). Component Video signals have a
user-selectable 36MHz, 20MHz, or 10MHz filter, or bypass
(275MHz). All filters selections are made via the I2C host
interface.
Clamps
The clamps for all the luma and composite channels can be
sync tip clamps (master mode) or timed keyed clamps (slave
mode) driven off the sync separator. The clamps for the
chroma channels (C/Pr/Pb) are keyed clamps timed to either
the luma (master mode) or the sync separator (slave mode).
Clamp Disable
The clamp can be disabled for each channel by setting the
appropriate bit high in the Miscellaneous 2 register (0x16).
For the S-video and component channels, additional action
needs to be taken in order to completely disable the clamps.
For S-video, setting the bit in the Miscellaneous 2 register
disables the pull-down 1A pull-down current for both the
luma and chroma channel along with the clamp pull-up
current for the luma channel. However, it does not disable
the clamp pull-up current for the chroma channel unless the
sync separator for that channel is set to 0x25.
For component, setting the bit in the Miscellaneous 2
register disables the pull-down 1A pull-down current for all
three channels, along with the clamp pull-up current for the
luma channel. However, it does not disable the clamp pull-up
current for the Pr and Pb channels unless the sync separator
for that channel is set to 0x24.
Low Offset Mode
Setting bit 6 in the Composite and S-Video Channel registers
increases the maximum amount of pull-up clamp current
available from 130A to 270A, which slightly reduces the
offset between the reference and the output when the clamp
is enabled.
For the component channels, this setting can be enabled by
setting Bit 7 in the Miscellaneous 2 register for Channel A and
Bit 3 for Channel B. This mode increases the maximum amount
of pull-up clamp current available from 270A to 500A.
References
Table 1 shows the references used for clamping depending
on the mode and video input being used. VSLICE should
usually be set to 70mV to 100mV above the selected
reference level for luma.
TABLE 1. CHANNEL REFERENCE LEVELS
VIDEO
OUTPUT
MASTER MODE
SLAVE MODE
GAIN 1
GAIN 2
GAIN 1
GAIN 2
Composite
VTIP
VLUMAx1
VLUMAx2
S-Video
Luma
VTIP
VLUMAx1
VLUMAx2
S-Video
Chroma
VCHROMAx1 VCHROMAx2 VCHROMAx1 VCHROMAx2
Component:
Luma/Green
(YPrPb Mode)
VTIP
VLUMAx1
VLUMAx2
Component:
Luma/Green
(RGB Mode)
VTIP
VLUMAx1
VLUMAx2
ISL59450
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| ISL59450IQZ-EVAL | 制造商:Intersil Corporation 功能描述:ISL59450IQZ-EVAL EVALUATION BOARD - Bulk |
| ISL59451 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Triple 4:1 DC Restored Single Supply Video Multiplexing Amplifier |
| ISL59451IRZ | 功能描述:IC AMP TRIPLE MUX 250MHZ 32-QFN RoHS:是 類別:集成電路 (IC) >> 線性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 應(yīng)用:TFT-LCD 面板：VCOM 驅(qū)動(dòng)器 輸出類型:滿擺幅 電路數(shù):1 -3db帶寬:35MHz 轉(zhuǎn)換速率:40 V/µs 電流 - 電源:3.7mA 電流 - 輸出 / 通道:1.3A 電壓 - 電源，單路/雙路(±):9 V ~ 20 V，±4.5 V ~ 10 V 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬）裸露焊盤 供應(yīng)商設(shè)備封裝:8-uMax-EP 包裝:管件 |
| ISL59451IRZ-T7 | 功能描述:IC AMP MUX TRIPLE 4:1 DC 32-QFN RoHS:是 類別:集成電路 (IC) >> 線性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 應(yīng)用:TFT-LCD 面板：VCOM 驅(qū)動(dòng)器 輸出類型:滿擺幅 電路數(shù):1 -3db帶寬:35MHz 轉(zhuǎn)換速率:40 V/µs 電流 - 電源:3.7mA 電流 - 輸出 / 通道:1.3A 電壓 - 電源，單路/雙路(±):9 V ~ 20 V，±4.5 V ~ 10 V 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬）裸露焊盤 供應(yīng)商設(shè)備封裝:8-uMax-EP 包裝:管件 |
| ISL59452 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Triple 4:1 Single Supply Video Multiplexing Amplifier |
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