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| 型号： | ADG3242BRJZ-REEL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 5/16页 |
| 文件大小： | 0K |
| 描述： | IC SW BUS CTRL 2.5/3.3V SOT23-8 |
| 标准包装： | 1 |
| 类型： | 总线开关 |
| 电路： | 2 x 1:1 |
| 独立电路： | 1 |
| 电压电源： | 单电源 |
| 电源电压： | 2.5V, 3.3V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-8 |
| 供应商设备封装： | SOT-23-8 |
| 包装： | 标准包装 |
| 其它名称： | ADG3242BRJZ-REEL7DKR |
ADG3242
Rev. A | Page 13 of 16
BUS ISOLATION
A common requirement of bus architectures is low capacitance
loading of the bus. Such systems require bus bridge devices that
extend the number of loads on the bus without exceeding the spec-
ifications. Because the ADG3242 is designed specifically for
applications that do not need drive, yet require simple logic func-
tions, it solves this requirement. The device isolates access to
the bus, thus minimizing capacitance loading.
BUS/
BACKPLANE
LOAD A
LOAD C
LOAD B
LOAD D
BUS SWITCH
LOCATION
043
09
-0
34
Figure 35. Location of Bus Switched in a Bus Isolation Application
HOT PLUG AND HOT SWAP ISOLATION
The ADG3242 is suitable for hot swap and hot plug applications.
The output signal of the ADG3242 is limited to a voltage that
Figure 34. Thus, the switch acts like a buffer to take the impact
from the hot insertion, protecting vital and expensive chipsets
from damage.
In hot plug applications, the system cannot be shut down when
new hardware is being added. To overcome this, a bus switch can
be positioned on the backplane between the bus devices and the
hot plug connectors. The bus switch is turned off during hot plug.
Figure 36 shows a typical example of this type of application.
PLUG-IN
CARD (1)
CARD I/O
RAM
BUS
CPU
PLUG-IN
CARD (2)
A
D
G3242
A
D
G32
4
2
0
430
9-
03
5
Figure 36. ADG3242 in a Hot Plug Application
There are many systems, such as docking stations, PCI boards for
servers, and line cards for telecommunications switches, that
require the ability to handle hot swapping. If the bus can be isolated
prior to insertion or removal, there is more control over the hot
swap event. This isolation can be achieved using bus switches. The
bus switches are positioned on the hot swap card between the con-
nector and the devices. During hot swap, the ground pin of the
hot swap card must connect to the ground pin of the backplane
before connecting to any other signal or power pins.
ANALOG SWITCHING
Bus switches are used in many analog switching applications,
for example, video graphics. Bus switches can have lower on
resistance, smaller on and off channel capacitance, and better
frequency performance than their analog counterparts. The
bus switch channel itself, consisting solely of an NMOS switch,
limits the operating voltage (see Figure 4 for a typical plot), but
in many cases, this does not present an issue.
HIGH IMPEDANCE DURING POWER-UP/POWER-
DOWN
To ensure the high impedance state during power-up or power-
down, BE must be tied to VCC through a pull-up resistor. The
minimum value of the resistor is determined by the current sink-
ing capability of the driver.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADG3243 | 制造商:AD 制造商全称:Analog Devices 功能描述:2.5 V/3.3 V, 2-Bit, Individual Control Level Translator Bus Switch |
| ADG3243BRJ-R | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| ADG3243BRJ-R2 | 功能描述:IC SW BUS CTRL 2.5/3.3V SOT23-8 RoHS:否 类别:集成电路 (IC) >> 逻辑 - 信号开关，多路复用器，解码器 系列:- 标准包装:48 系列:74VHC 类型:多路复用器 电路:4 x 2:1 独立电路:1 输出电流高，低:8mA，8mA 电压电源:单电源 电源电压:2 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:管件 |
| ADG3243BRJ-REEL | 功能描述:IC SW BUS CTRL 2.5/3.3V SOT23-8 RoHS:否 类别:集成电路 (IC) >> 逻辑 - 信号开关，多路复用器，解码器 系列:- 标准包装:48 系列:74VHC 类型:多路复用器 电路:4 x 2:1 独立电路:1 输出电流高，低:8mA，8mA 电压电源:单电源 电源电压:2 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:管件 |
| ADG3243BRJ-REEL7 | 功能描述:IC SW BUS CTRL 2.5/3.3V SOT23-8 RoHS:否 类别:集成电路 (IC) >> 逻辑 - 信号开关，多路复用器，解码器 系列:- 标准包装:48 系列:74VHC 类型:多路复用器 电路:4 x 2:1 独立电路:1 输出电流高，低:8mA，8mA 电压电源:单电源 电源电压:2 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:管件 |
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