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参数资料
| 型号： | ISL54207IRUZ-T |
| 厂商： | INTERSIL CORP |
| 元件分类： | 运动控制电子 |
| 英文描述： | Low Voltage, Dual SPDT, USB/CVBS/ Audio Switches, with Negative Signal Capability |
| 中文描述： | DUAL 1-CHANNEL, SGL POLE DOUBLE THROW SWITCH, PQCC10 |
| 封装： | 2.10 X 1.60 MM, ROHS COMPLIANT, PLASTIC, MO-255UABD, UTQFN-10 |
| 文件页数： | 8/14页 |
| 文件大小： | 462K |
| 代理商： | ISL54207IRUZ-T |
8
FN6403.0
December 5, 2006
Application Block Diagram
Detailed Description
The ISL54207 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 mono audio/composite video
baseband signals (CVBS). It comes in tiny
μ
TQFN and
TDFN packages for use in cameras, camcorders, video MP3
players, PDAs, cell phones, and other personal media
players.
The part consists of two 3
Ω
audio/video switches and two
5
Ω
USB switches. The audio/video switches can accept
signals that swing below ground. They were designed to
pass ground reference audio or dc restored with synch
composite video signals with minimal distortion. The USB
switches were designed to pass high-speed USB differential
data signals with minimal edge and phase distortion.
The ISL54207 was specifically designed for digital cameras,
camcorders, MP3 players, cell phones and other personal
media player applications that need to combine the
audio/video jacks and the USB data connector into a single
shared connector, thereby saving space and component
cost. A typical application block diagram of this functionality
is shown above.
The ISL54207 incorporates circuitry for the detection of the
USB V
BUS
voltage, which is used to switch between the
audio/video drivers and USB transceiver of the media player.
The ISL54207 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 I
DD
current.
A detailed description of the two types of switches is
provided in the following sections. The USB transmission
and audio/video playback are intended to be mutually
exclusive operations.
NC1 and NC2 Audio/Video Switches
The two NC (normally closed) audio/video switches (NC1,
NC2) are 3
Ω
switches that can pass signals that swing
below ground by as much as 1.5V. They were designed to
pass ground reference audio signals and DC restored
composite base-band signals (CVBS), including negative
synchronizing pulse with minimal insertion loss and very low
distortion and degradation.
The -3dB bandwidth into 75
Ω
is 338MHz (Figure 17).
Crosstalk between NC1 and NC2 @ 4MHz is -78dB
(Figure 16), which allows composite video to be routed
through one switch and mono-audio through the other switch
with little interference.
The recommended maximum signal range is from -1.5V to
1.5V. You can apply positive signals greater than 1.5V but
the r
ON
resistance of the switch increases rapidly above
1.5V. The signal should not be allowed to exceed the V
DD
rail or swing more negative than -1.5V.
Over a signal range of ±1V (0.707Vrms) with V
DD
> 2.7V,
these switches have an extremely low r
ON
resistance
variation. They can pass a ground referenced audio signal
with very low distortion (<0.06% THD+N) when delivering
15.6mW into a 32
Ω
headphone speaker load. See
Figures 10, 11, 12, and 13 THD+N performance curves.
Figure 8 and 9 shows the vector scope plots of a standard
NTSC color bar signal at both the input (Figure 8) and output
(Figure 9) of the ISL54207. The plots show that except for a
little attenuation due to switch r
ON
and test fixture cabling,
there is virtually no degradation of the video waveform
through the switch.
ISL54207
USB
TRANSCEIVER
HIGH-SPEED
AUDIO
U
COM1
COM2
VBUS
GND
NO1
NO2
NC1
NC2
VDD
CTRL
LOGIC CIRCUITRY
mCONTROLLER
22k
Ω
4M
Ω
4M
Ω
50k
Ω
50k
Ω
NTSC or PAL
VIDEO
D+
D-
ISL54207
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| ISL54207IRZ | Low Voltage, Dual SPDT, USB/CVBS/ Audio Switches, with Negative Signal Capability |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL54207IRZ | 功能描述:IC SWITCH USB/CVBS/AUDIO 10-TDFN 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 |
| ISL54207IRZ-T | 功能描述:IC SWITCH USB/CVBS/AUDIO 10-TDFN 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 |
| ISL54208 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Low Voltage, Dual SPDT, USB/CVBS/ Audio Switches, with Negative Signal Capability |
| ISL54208EVAL1Z | 功能描述:EVALUATION BOARD FOR ISL54208 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:PCI Express® (PCIe) 主要目的:接口，收发器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要属性:- 次要属性:- 已供物品:板 |
| ISL54208IRUZ-T | 功能描述:IC SWITCH USB/CVBS/AUDIO 10-TQFN 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 |
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