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| 型號(hào)： | ISL54208IRZ |
| 廠商： | Intersil |
| 文件頁(yè)數(shù)： | 2/15頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC SWITCH USB/CVBS/AUDIO 10-TDFN |
| 標(biāo)準(zhǔn)包裝： | 100 |
| 功能： | 開(kāi)關(guān) |
| 電路： | 2 x SPDT |
| 導(dǎo)通狀態(tài)電阻： | 5 歐姆 |
| 電壓電源： | 單電源 |
| 電壓 - 電源，單路/雙路(±)： | 1.8 V ~ 5.5 V |
| 電流 - 電源： | 6µA |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 10-VFDFN 裸露焊盤(pán) |
| 供應(yīng)商設(shè)備封裝： | 10-TDFN/MLP（3x3） |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁(yè)面： | 1247 (CN2011-ZH PDF) |
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10
FN6410.0
December 18, 2006
ISL54208 Operation
The discussion that follows will discuss using the ISL54208 in
the typical application shown in the block diagrams on
VDD SUPPLY
The dc power supply connected at VDD (pin 1) provides the
required bias voltage for proper switch operation. The part
can operate with a supply voltage in the range of 1.8V to
5.5V.
In a typical USB/Audio/Video application for portable battery
powered devices the VDD voltage will come from a battery or
an LDO and be in the range of 2.7V to 3.6V. For best
possible USB full-speed operation (12Mbps) it is
recommended that the VDD voltage be
≥3.3V in order to get
a USB data signal level above 2.5V.
LOGIC CONTROL
The state of the ISL54208 device is determined by the
voltage at the IN pin (pin 2) and the CTRL pin (pin 10). Refer
to truth-table on page 2 of data sheet. These logic pins are
1.8V compatible with VDD in the range of 2.7V to 3.6V and
can be controlled by a standard
μprocessor.
The CTRL pin is internally pulled low through a 4MΩ
resistors to ground and can be left floating or tri-stated by the
μprocessor. The CTRL control pin is only active when IN is
logic “0”.
The IN pin does not have an internal pull-down resistor and
must not be allowed to float. It must be driven High or Low.
The voltage at the IN pin can exceed the VDD voltage by as
much as 2.55V. This allows the VBUS voltage from a
computer or USB hub (4.4V to 5.25V) to drive the IN pin
while the VDD voltage is in the range of 2.7V to 3.6V. An
external pull-down resistor is required from the IN pin to
ground when directly driving the IN pin with the computer
VBUS voltage. See the section titled “USING THE
COMPUTER VBUS VOLTAGE TO DRIVE THE “IN’ PIN”.
Logic control voltage levels:
IN = Logic “0” (Low) when ≤0.5V
IN = Logic “1” (High) when IN ≥1.4V
CTRL = Logic “0” (Low) when ≤0.5V or floating.
CTRL = Logic “1” (High) when ≥1.4V
Audio/Video Mode
If the IN pin = Logic “0” and CTRL pin = Logic “1,” the part
will be in the Audio/Video mode. In Audio/Video mode the
NC1 and NC2 3
Ω audio/video switches are ON and the NO1
and NO2 5
Ω USB switches are OFF (high impedance).
When nothing is plugged into the common connector or a
audio/video jack is plugged into the common connector, the
μprocessor will sense that there is no voltage at the VBUS
pin of the connector and will drive and hold the IN control pin
of the ISL54208 low. As long as the CTRL = Logic “1,” the
ISL54208 part will be in the audio/video mode and the media
player audio and video drivers can drive the speaker and
video display.
USB Mode
If the IN pin = Logic “1” and CTRL pin = Logic “0” or Logic “1”
the part will go into USB mode. In USB mode, the NO1 and
NO2 5
Ω switches are ON and the NC1 and NC2 3Ω
audio/video switches are OFF (high impedance).
When a USB cable from a computer or USB hub is
connected at the common connector, the μprocessor will
sense the present of the 5V VBUS and drive the IN pin
voltage high. The ISL54208 part will go into the USB mode.
In USB mode, the computer or USB hub transceiver and the
media player USB transceiver are connected and digital data
will be able to be transmitted back and forth.
When the USB cable is disconnected, the μprocessor will
sense that the 5V VBUS voltage is no longer connected and
will drive the IN pin low and put the part back into the
Audio/Video or Low Power Mode.
Low Power Mode
If the IN pin = Logic “0” and CTRL pin = Logic “0,” the part
will be in the Low Power mode. In the Low Power mode, the
NCx switches and the NOx switches are OFF (high
impedance). In this state, the device draws typically 1nA of
current.
USING THE COMPUTER VBUS VOLTAGE TO DRIVE THE
“IN” PIN
External IN Pull-Down Resistor
Rather than using a micro-processor to control the IN logic
pin you can directly drive the IN pin using the VBUS voltage
from the computer or USB hub. In order to do this you must
connected an external pull-down resistor from the IN pin to
ground.
When an audio/video jack or nothing is connected at the
common connector the external pull-down resistor will pull
the IN pin low putting the ISL54208 in the Audio/Video Mode
or Low Power Mode depending on the condition of the CTRL
pin.
When a USB cable is connected at the common connector
the voltage at the IN pin will be driven to 5V and the part will
automatically go into the USB mode.
When the USB cable is disconnected from the common
connector the voltage at the IN pin will be pulled low by the
pull-down resistor and return to the Audio/Video Mode or
Low Power Mode depending on the condition of the CTRL
pin.
Note: The voltage at the IN pin can exceed the VDD voltage
by as much as 2.55V. This allows the VBUS voltage from a
computer or USB hub (4.4V to 5.25V) to drive the IN pin
while the VDD voltage is in the range of 2.7V to 3.6V.
ISL54208
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相關(guān)代理商/技術(shù)參數(shù) |
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| ISL54208IRZ-T | 功能描述:IC SWITCH USB/CVBS/AUDIO 10-TDFN RoHS:是 類(lèi)別:集成電路 (IC) >> 接口 - 模擬開(kāi)關(guān)，多路復(fù)用器，多路分解器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:36 系列:- 功能:多路復(fù)用器 電路:2 x 4:1 導(dǎo)通狀態(tài)電阻:75 歐姆 電壓電源:單/雙電源 電壓 - 電源，單路/雙路(±):2 V ~ 12 V，±2 V ~ 6 V 電流 - 電源:- 工作溫度:0°C ~ 70°C 安裝類(lèi)型:表面貼裝 封裝/外殼:20-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:20-SOIC W 包裝:管件 |
| ISL54209 | 制造商:INTERSIL 制造商全稱(chēng):Intersil Corporation 功能描述:MP3/USB 2.0 High Speed Switch with Negative Signal Handling and Low Power Shutdown |
| ISL54209EVAL1Z | 功能描述:EVALUATION BOARD FOR ISL54209 RoHS:是 類(lèi)別:編程器，開(kāi)發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:- 標(biāo)準(zhǔn)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 |
| ISL54209IRTZ | 功能描述:IC USB SWITCH DUAL SPDT 10TDFN RoHS:是 類(lèi)別:集成電路 (IC) >> 接口 - 模擬開(kāi)關(guān)，多路復(fù)用器，多路分解器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:36 系列:- 功能:多路復(fù)用器 電路:2 x 4:1 導(dǎo)通狀態(tài)電阻:75 歐姆 電壓電源:單/雙電源 電壓 - 電源，單路/雙路(±):2 V ~ 12 V，±2 V ~ 6 V 電流 - 電源:- 工作溫度:0°C ~ 70°C 安裝類(lèi)型:表面貼裝 封裝/外殼:20-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:20-SOIC W 包裝:管件 |
| ISL54209IRTZ-T | 功能描述:IC USB SWITCH DUAL SPDT 10TDFN RoHS:是 類(lèi)別:集成電路 (IC) >> 接口 - 模擬開(kāi)關(guān)，多路復(fù)用器，多路分解器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:36 系列:- 功能:多路復(fù)用器 電路:2 x 4:1 導(dǎo)通狀態(tài)電阻:75 歐姆 電壓電源:單/雙電源 電壓 - 電源，單路/雙路(±):2 V ~ 12 V，±2 V ~ 6 V 電流 - 電源:- 工作溫度:0°C ~ 70°C 安裝類(lèi)型:表面貼裝 封裝/外殼:20-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:20-SOIC W 包裝:管件 |
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