基于ISL3300x設(shè)計(jì)的I2C總線擴(kuò)展方案
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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
圖1.ISL3300x電路方框圖
圖2.ISL3300x典型應(yīng)用電路框圖
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