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參數(shù)資料
| 型號： | ISL54215IRUZ-T |
| 廠商： | Intersil |
| 文件頁數(shù)： | 2/15頁 |
| 文件大小： | 0K |
| 描述： | IC USB SWITCH DUAL SPDT 10UTQFN |
| 標準包裝： | 3,000 |
| 功能： | USB 開關 |
| 電路： | 2 x SPDT |
| 導通狀態(tài)電阻： | 20 歐姆 |
| 電壓電源： | 單電源 |
| 電壓 - 電源，單路/雙路(±)： | 2.5 V ~ 5 V |
| 電流 - 電源： | 7µA |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 10-UFQFN |
| 供應商設備封裝： | 10-UTQFN（2.1x1.6） |
| 包裝： | 帶卷 (TR) |
10
November 25, 2008
When nothing is plugged into the common connector or a
headphone is plugged into the common connector, the
microprocessor 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 ISL54215 low. As long as CTRL = Logic
“1,” the ISL54215 part will be in the audio mode and the
audio drivers of the media player can drive the headphones
and play music.
USB Mode
If the IN pin = Logic “1” and the CTRL pin = Logic “0” or
Logic “1”, the part will go into USB mode. In USB mode, the
D- and D+ 5
Ω switches are ON and the L and R 2.5Ω audio
switches are OFF (high impedance).
When a USB cable from a computer or USB hub is
connected at the common connector, the processor will
sense the presence of the 5V VBUS and drive the IN pin
voltage high. The ISL54215 part will go into the USB mode.
In USB mode, the computer or USB hub transceiver and the
MP3 player or cell phone USB transceiver are connected
and digital data will be able to be transmitted back and forth.
When the USB cable is disconnected, the processor 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
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
audio switches and the USB switches are OFF (high
impedance). In this state, the device draws typically 1nA of
current.
In Low Power mode, the OFF-isolation and crosstalk
between switch cells is minimal for negative swinging
signals. Care should be taken to avoid negative swinging
signals in this mode of operation. In typical applications, the
Low Power state will be applied to the ISL54215 part when
the portable media player is in its sleep or hibernate mode to
conserve battery power. In the sleep mode, no audio or USB
signals are applied to the part.
USING THE COMPUTER VBUS VOLTAGE TO DRIVE THE
“IN” PIN
Rather than using a microprocessor to control the IN logic
pin, one can directly drive the IN pin using the 5V VBUS
voltage from the computer or USB hub. See the Application
Block Diagram, Figure 9.
When a headphone or nothing is connected at the common
connector, the internal 4M
Ω pull-down will pull the IN pin low,
putting the ISL54215 in the Audio 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 or Low Power
mode, depending on the condition of the CTRL pin.
Note: The ISL54215 contains an internal diode between the
IN pin and VDD pin. Whenever the IN voltage is greater than
the VDD voltage by more than 0.7V, current will flow through
this diode into the VDD power supply bus. An external series
resistor in the range of 100k
Ω to 500kΩ is required at the IN
logic pin to limit the current when driving it with the VBUS
voltage. 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 2.5V to 3.6V. A 500k
Ω resistor will
limit the current to 2.76A and still allow the IN logic voltage
to go to around 3.67V, which is will above the required VINH
level of 1.4V. A smaller series resistor can be used but more
current will flow.
ISL54215
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| ISL54216IRUZ-T | IC USB SWITCH SP3T DUAL 12TQFN |
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相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL54216 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:USB 2.0 High-Speed/UART Dual SP3T (Dual 3 to 1 Multiplexer) |
| ISL54216EVAL1Z | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:USB 2.0 High-Speed/UART Dual SP3T (Dual 3 to 1 Multiplexer) |
| ISL54216IRTZ | 功能描述:IC USB SWITCH SP3T DUAL 12TQFN RoHS:是 類別:集成電路 (IC) >> 接口 - 模擬開關，多路復用器，多路分解器 系列:- 其它有關文件:STG4159 View All Specifications 標準包裝:5,000 系列:- 功能:開關 電路:1 x SPDT 導通狀態(tài)電阻:300 毫歐 電壓電源:雙電源 電壓 - 電源，單路/雙路(±):±1.65 V ~ 4.8 V 電流 - 電源:50nA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:7-WFBGA，F(xiàn)CBGA 供應商設備封裝:7-覆晶 包裝:帶卷 (TR) |
| ISL54216IRTZ-T | 功能描述:IC USB SWITCH SP3T DUAL 12TQFN RoHS:是 類別:集成電路 (IC) >> 接口 - 模擬開關，多路復用器，多路分解器 系列:- 其它有關文件:STG4159 View All Specifications 標準包裝:5,000 系列:- 功能:開關 電路:1 x SPDT 導通狀態(tài)電阻:300 毫歐 電壓電源:雙電源 電壓 - 電源，單路/雙路(±):±1.65 V ~ 4.8 V 電流 - 電源:50nA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:7-WFBGA，F(xiàn)CBGA 供應商設備封裝:7-覆晶 包裝:帶卷 (TR) |
| ISL54216IRUZ-T | 功能描述:IC USB SWITCH SP3T DUAL 12TQFN RoHS:是 類別:集成電路 (IC) >> 接口 - 模擬開關，多路復用器，多路分解器 系列:- 其它有關文件:STG4159 View All Specifications 標準包裝:5,000 系列:- 功能:開關 電路:1 x SPDT 導通狀態(tài)電阻:300 毫歐 電壓電源:雙電源 電壓 - 電源，單路/雙路(±):±1.65 V ~ 4.8 V 電流 - 電源:50nA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:7-WFBGA，F(xiàn)CBGA 供應商設備封裝:7-覆晶 包裝:帶卷 (TR) |
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