ISL3300x系列（ISL33001, ISL33002, ISL33003）是Intersil 公司的2路I2C总线双相缓冲器，可以扩展总线的电容超过400pF,工作电压2.3V到5.5V,工作温度-40℃ 到+85℃。，工作频率大于400kHz,具有热插拔功能，主要用在I2C总线扩展器和电容缓冲器，通信，数据通信的服务机架和计算机服务器，台式计算机，板卡热拔和总线隔离。本文介绍ISL3300x系列主要特性， 电路方框图， 典型应用电路框图和ISL3300x评估板主要特性，电路图和元件清单（BOM）。

    The ISL33001, ISL33002, ISL33003 2-Channel Bus Buffers provide the necessary buffering for extending the bus capacitance beyond the 400pF maximum specified by the I2C specification. In addition, the ISL33001, ISL33002, ISL33003 feature rise time accelerator circuitry to reduce power consumption from passive bus pull-up resistors and improve data-rate performance. All devices also include hot swap circuitry to prevent corruption of the data and clock lines when I2C devices are plugged into a live backplane and level translation for mixed supply voltage applications.

    The ISL33001, ISL33002, ISL33003 operates at supply voltages from +2.3V to +5.5V at a temperature range of -40℃ to +85℃。

    ISL3300x系列主要特性：

    o 2 Channel I2C Compatible Bi-Directional Buffer

    o +2.3VDC to +5.5VDC Supply Range

    o >400kHz Operation

    o Bus Capacitance Buffering

    o Rise Time Accelerators

    o Hot-Swapping Capability

    o ±6kV Class 3 HBM ESD Protection On All Pins

    o ±12kV HBM ESD Protection on SDA/SCL Pins

    o Enable Pin （ISL33001 and ISL33003）

    o Logic Level Translation （ISL33002 and ISL33003）

    o READY Logic Pin （ISL33001）

    o Accelerator Disable Pin （ISL33002）

    o Pb-Free （RoHS Compliant） 8 Ld TDFN （3mmx3mm） and 8 Ld MSOP packages

    o Low Quiescent Current . . . . . . . . . . . . . 2.2mA typ

    o Low Shutdown Current . . . . . . . . . . . . .  0.5μA typ

    ISL3300x 系列应用：

    o I2C Bus Extender and Capacitance Buffering

    o Server Racks for Telecom, Datacom, and Computer Servers

    o Desktop Computers

    o Hot-Swap Board Insertion and Bus Isolation

    图1.ISL3300x电路方框图