P82B96TD/NXP
双重双向总线缓冲
2009年11月启08年- 10年

The P82B96 is a bipolar IC that creates a non-latching, bidirectional, logic interface
between the normal I2C-bus and a range of other bus configurations. It can interface
I2C-bus logic signals to similar buses having different voltage and current levels.
For example, it can interface to the 350 µA SMBus, to 3.3 V logic devices, and to 15 V
levels and/or low-impedance lines to improve noise immunity on longer bus lengths.
It achieves this interface without any restrictions on the normal I2C-bus protocols or clock
speed. The IC adds minimal loading to the I2C-bus node, and loadings of the new bus or
remote I2C-bus nodes are not transmitted or transformed to the local node. Restrictions
on the number of I2C-bus devices in a system, or the physical separation between them,
are virtually eliminated. Transmitting SDA and SCL signals via balanced transmission
lines (twisted pairs) or with galvanic isolation (opto-coupling) is simple because separate
directional Tx and Rx signals are provided. The Tx and Rx signals may be directly
connected, without causing latching, to provide an alternative bidirectional signal line with
I2C-bus properties.


P82B96是双极集成电路,创建一个non-latching双向、逻辑接口
正常的i2c总线和一系列其他总线之间的配置。它可以接口
i2c总线逻辑信号相似的公共汽车有不同的电压和电流的水平。
例如,它可以接口350µA SMBus,3.3 V逻辑器件,15 V
水平和/或低阻抗的行改善噪音免疫力总线长度更长。
它实现了这个接口没有任何限制正常的i2c总线协议或时钟
速度。集成电路增加了最小加载到i2c总线节点,和新公共汽车或载荷
远程i2c总线节点传输或转换为本地节点。限制
i2c总线设备的数量在一个系统,或它们之间的物理分离,
几乎消除。通过平衡传输传输SDA和sci信号
行(双绞线)或电隔离(opto-coupling)是分开的
定向Tx和Rx信号。Tx和Rx可能直接信号
连接,没有造成闭锁,提供另一种双向信号符合
i2c总线属性。