LTC4310CDD-2#PBF

LTC4310CDD-2#PBF is a hot-swappable I²C isolator that provides bidirectional I²C communications between two I²C buses whose grounds are isolated from one another. It encodes I²C bus logic states into signals that are transmitted across an isolation barrier to another LTC4310. The receiving LTC4310 decodes the transmission and drives its l²C bus to the appropriate logic state. The isolation barrier can be bridged by an inexpensive Ethernet, or other transformer, to achieve communications across voltage differences reaching thousands of volts, or it can be bridged by capacitors for lower voltage isolation. The LTC4310-2 is intended for 400KHz I²C systems. Rise time accelerators provide strong pull-up currents on SCL and SDA rising edges to meet rise time specifications for heavily loaded systems. Application includes isolated I²C, SMBus and PMBus interfaces, isolated power supplies, positive-to-negative Rail communications, power-over-ethernet.

• Bidirectional I²C communication between two isolated buses
• Full isolation with inexpensive ethernet transformers or capacitors
• Low voltage level shifting, shutdown input supply current is 0.1µA typ at (EN = 0V, VCC = 5.5V)
• I²C specification compliant VOL, VIL, ±5kV human body model ESD protection
• Rise time accelerators, SDA, SCL hot-swapping
• Very low shutdown current, stuck bus disconnect and recovery, thermal shutdown
• Input supply range from 3 to 5.5V, SCL, SDA input capacitance is 10pF max at (SCL, SDA=VCC, TA=25°C)
• Input supply current is 7mA typ (EN = VCC = 5.5V, SDA = SCL = VSDA,SCL(OL))
• Start-up filter time is 900µs typ, bus idle time is 115µs typ at (TA = 25°C)
• 10 lead plastic DFN package, temperature range from 0°C to 70°C

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