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參數(shù)資料
| 型號： | ISL54221IRUZ-T |
| 廠商： | Intersil |
| 文件頁數(shù)： | 11/13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： | 8 歐姆 |
| 電壓電源： | 單電源 |
| 電壓 - 電源，單路/雙路(±)： | 2.7 V ~ 5.5 V |
| 電流 - 電源： | 9nA |
| 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) |
7
FN6820.0
December 16, 2008
Application Block Diagram
Detailed Description
The ISL54221 device is a dual single pole/double throw
(SPDT) analog switch configured as a DPDT that operates
from a single DC power supply in the range of 2.7V to 5.5V.
It was designed to function as a dual 2-to-1 multiplexer to
select between two USB high-speed differential data signals
in portable battery powered products. It is offered in a small
TQFN package for use in MP3 players, cameras, PDAs,
cellphones, and other personal media players. The device
has an enable pin to open all switches.
The part consists of four 6
Ω high-speed (HSx) switches.
These switches have high bandwidth and low capacitance to
pass USB high-speed (480Mbps) differential data signals
with minimal edge and phase distortion. They can also swing
from 0V to VDD to pass USB full-speed (12Mbps) differential
data signals with minimal distortion.
The ISL54221 was designed for MP3 players, cameras,
cellphones, and other personal media player applications
that have multiple high-speed or full-speed transceivers
sections and need to multiplex between these USB sources
to a single USB host (computer). A typical application block
diagram of this functionality is shown on page 7.
A detailed description of the HS switches is provided in the
following section.
High-Speed (HSx) Switches
The HSx switches (HSD1-, HSD1+, HSD2-, HSD2+) are
bi-directional switches that can pass rail-to-rail signals.
When powered with a 3.3V supply, these switches have a
nominal rON of 6Ω over the signal range of 0V to 400mV with
a rON flatness of 0.94Ω. The rON matching between the
HSD1 and HSD2 switches over this signal range is only
0.12
Ω, ensuring minimal impact by the switches to USB
high-speed signal transitions. As the signal level increases,
the rON switch resistance increases. At signal level of 3.3V,
the switch resistance is nominally 129
The HSx switches were specifically designed to pass USB
2.0 high-speed (480Mbps) differential signals in the range of
0V to 400mV. They have low capacitance and high
bandwidth to pass the USB high-speed signals with
minimum edge and phase distortion to meet USB 2.0
high-speed signal quality specifications. See Figure 11 in the
“Typical Performance Curves” on page 10 for USB
High-speed Eye Pattern taken with switch in the signal path.
The HSx switches can also pass USB full-speed signals
(12Mbps) with minimal distortion and meet all the USB
requirements for USB 2.0 full-speed signaling. See Figure 12
in the “Typical Performance Curves” on page 11 for the USB
Full-speed Eye Pattern taken with switch in the signal path.
The maximum normal operating signal range for the HSx
switches is from 0V to VDD. The signal voltage should not be
allow to exceed the VDD voltage rail or go below ground by
more than 0.3V for normal operation.
However in the event that the USB 5.25V VBUS voltage gets
shorted to one or both of the D-/D+ pins, the ISL54221 has
special fault protection circuitry to prevent damage to the
ISL54221 part. The fault circuitry allows the signal pins (D-,
D+, HS1D-, HS1D+, HS2D-, HS2D+) to be driven up to 5.5V
while the VDD supply voltage is in the range of 0V to 5.5V. In
this condition the part draws < 500A of current and causes
no stress to the IC. In addition when VDD is at 0V (ground)
PORTABLE MEDIA DEVICE
ISL54221
USB
TRANSCEIVER
HIGH-SPEED
US
B
CONNE
C
T
OR
D-
D+
SEL
GND
HSD1-
HSD1+
HSD2-
HSD2+
VDD
OE
LOGIC CIRCUITRY
CONTROLLER
USB
TRANSCEIVER
FULL-SPEED
VBUS
D-
D+
GND
OR
FULL-SPEED
HIGH_SPEED
OR
ISL54221
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ISL54222 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:High-Speed USB 2.0 (480Mbps) Multiplexer |
| ISL54222_09 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:High-Speed USB 2.0 (480Mbps) Multiplexer |
| ISL54222A | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:High-Speed USB 2.0 (480Mbps) Multiplexer |
| ISL54222A_10 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:High-Speed USB 2.0 (480Mbps) Multiplexer |
| ISL54222AIRTZ | 功能描述:IC MULTIPLEXER DUAL 2X1 10TDFN 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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