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参数资料
| 型号： | ISL54205BIRTZ |
| 厂商： | Intersil |
| 文件页数： | 16/16页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH AUDIO/USB 10-TDFN |
| 标准包装： | 100 |
| 功能： | USB 开关 |
| 电路： | 2 x SPDT |
| 导通状态电阻： | 30 欧姆 |
| 电压电源： | 单电源 |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 3.6 V |
| 电流 - 电源： | 6µA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-VFDFN 裸露焊盘 |
| 供应商设备封装： | 10-TDFN/MLP（3x3） |
| 包装： | 管件 |
| 产品目录页面： | 1247 (CN2011-ZH PDF) |
9
FN6557.0
September 25, 2007
Application Block Diagram
Detailed Description
The ISL54205B device is a dual single pole/double throw
(SPDT) analog switch device that operates from a single DC
power supply in the range of 2.7V to 3.6V. It was designed to
function as a dual 2 to 1 multiplexer to select between USB
differential data signals and audio L and R stereo signals. It
comes in tiny TQFN and TDFN packages for use in MP3
players, PDAs, cell phones, and other personal media
players.
The part consists of two 3
Ω audio switches and two 5Ω USB
switches. The audio switches can accept signals that swing
below ground. They were designed to pass audio left and
right stereo signals, that are ground referenced, with minimal
distortion. The USB switches were designed to pass
high-speed USB differential data signals with minimal edge
and phase distortion.
The ISL54205B was specifically designed for MP3 players,
cell phones and other personal media player applications
that need to combine the audio headphone jack and the
USB data connector into a single shared connector, thereby
saving space and component cost. See “Application Block
The ISL54205B incorporates circuitry for the detection of the
USB VBUS voltage, which is used to switch between the
audio CODEC drivers and USB transceiver of the MP3
player or cell phone. The ISL54205B contains a logic control
pin (CTRL) that when driven low while VBUS is low, opens all
switches and puts the part into a low power state, drawing
typically 1nA of IDD current.
A detailed description of the two types of switches is
provided in the following sections. The USB transmission
and audio playback are intended to be mutually exclusive
operations.
Audio Switches
The two audio switches (L, R) are 3
Ω switches that can pass
signals that swing below ground. Crosstalk between the
audio switches over the audio band is <-110dB.
Over a signal range of ±1V (0.707VRMS) with VDD >2.7V,
these switches have an extremely low rON resistance
variation. They can pass ground referenced audio signals
with very low distortion (<0.06% THD+N) when delivering
15.6mW into a 32
Ω headphone speaker load. See Figures 8,
These switches are uni-directional switches. The audio
drivers should be connected at the L and R side of the switch
(pins 7 and 8) and the speaker loads should be connected at
the COM side of the switch (pins 3 and 4).
The audio switches are active (turned ON) whenever the
VBUS voltage is ≤ to VDD + 0.2V or floating and the CTRL
voltage ≥ to 1.4V.
Note: Whenever the audio switches are ON the USB
transceivers need to be in the high impedance state.
USB Switches
The two USB switches (D+, D-) are bidirectional switches
that can pass rail-to-rail signals. When powered with a 3.6V
supply these switches have a nominal r(ON) of 4.6Ω over the
signal range of 0V to 400mV with a r(ON) flatness of 0.4Ω.
The r(ON) matching between the D+ and D- switches over
this signal range is only 0.06
Ω ensuring minimal impact by
the switches to USB high speed signal transitions. As the
signal level increases the r(ON) resistance increases. At
signal level of 3.3V the switch resistance is nominally 23
Ω.
The USB switches were specifically designed to pass USB
2.0 high-speed (480Mbps) differential signals typically in the
range of 0V to 400mV. They have low capacitance and high
bandwidth to pass the USB high-speed signals with
ISL54205B
USB
TRANSCEIVER
HIGH-SPEED
CODEC
COM -
COM +
VBUS
GND
D-
D+
L
R
VDD
CTRL
LOGIC CIRCUITRY
CONTROLLER
22k
Ω
4M
Ω
4M
Ω
50k
Ω
50k
Ω
US
B/HEADPHONE
JACK
ISL54205B
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL54205BIRTZ-T | 功能描述:IC USB SWITCH DUAL SPDT 10TDFN RoHS:是 类别:集成电路 (IC) >> 接口 - 模拟开关，多路复用器，多路分解器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:36 系列:- 功能:多路复用器 电路:2 x 4:1 导通状态电阻:75 欧姆 电压电源:单/双电源 电压 - 电源，单路/双路(±):2 V ~ 12 V，±2 V ~ 6 V 电流 - 电源:- 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:20-SOIC（0.295"，7.50mm 宽） 供应商设备封装:20-SOIC W 包装:管件 |
| ISL54205BIRUZ-T | 功能描述:IC USB SWITCH DUAL SPDT 10UTQFN RoHS:是 类别:集成电路 (IC) >> 接口 - 模拟开关，多路复用器，多路分解器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:36 系列:- 功能:多路复用器 电路:2 x 4:1 导通状态电阻:75 欧姆 电压电源:单/双电源 电压 - 电源，单路/双路(±):2 V ~ 12 V，±2 V ~ 6 V 电流 - 电源:- 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:20-SOIC（0.295"，7.50mm 宽） 供应商设备封装:20-SOIC W 包装:管件 |
| ISL54205EVAL1Z | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:MP3/USB 2.0 High Speed Switch with Negative Signal Handling |
| ISL54205IRUZ-T | 制造商:Intersil Corporation 功能描述:AUDIO/USB SWITCH, 10LD 2.1X1.6X.5MM UTQFN IND, T&R - Tape and Reel 制造商:Intersil 功能描述:AUD/USB SWITCH 10LD 2 1X1 6X 5MM IND |
| ISL54206 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:MP3/USB 2.0 High Speed Switch with Negative Signal Handling |
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