基于ISL3300x設(shè)計的I2C總線擴展方案

作者：時間：2010-05-11 來源：網(wǎng)絡(luò)

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ISL3300x系列(ISL33001, ISL33002, ISL33003)是2路I2C總線雙相緩沖器,可以擴展總線的電容超過400pF,工作電壓2.3V到5.5V,工作溫度-40℃ 到+85℃.,工作頻率大于400kHz,具有熱插拔功能,主要用在I2C總線擴展器和電容緩沖器,通信,數(shù)據(jù)通信的服務(wù)機架和計算機服務(wù)器,臺式計算機,板卡熱拔和總線隔離.本文介紹ISL3300x系列主要特性, 電路方框圖, 典型應(yīng)用電路框圖和ISL3300x評估板主要特性,電路圖和元件清單(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:

2 Channel I2C Compatible Bi-Directional Buffer

+2.3VDC to +5.5VDC Supply Range

>400kHz Operation

Bus Capacitance Buffering

Rise Time Accelerators

Hot-Swapping Capability

±6kV Class 3 HBM ESD Protection On All Pins

±12kV HBM ESD Protection on SDA/SCL Pins

Enable Pin (ISL33001 and ISL33003)

Logic Level Translation (ISL33002 and ISL33003)

READY Logic Pin (ISL33001)

Accelerator Disable Pin (ISL33002)

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

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

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

ISL3300x 系列應(yīng)用:

I2C Bus Extender and Capacitance Buffering

Server Racks for Telecom, Datacom, and Computer Servers

Desktop Computers

Hot-Swap Board Insertion and Bus Isolation