ANALOG DEVICES LTC4310CMS-1#PBF Digital Isolator, 3 V, 5.5 V, MSOP, 10 Pins

LTC4310CMS-1#PBF is a hot-swappable I²C isolator. It provides bidirectional I²C communications between two I²C buses whose grounds are isolated from one another. The LTC4310 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 I²C 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. It is intended for use in 100KHz 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. It is used in applications such as isolated I²C, SMBus and PMBus interfaces, isolated power supplies, positive-to-negative rail communications, power-over-ethernet.

• Bidirectional I²C communication between two isolated buses
• I²C specification compliant VOL, VIL, ±5KV human body model ESD protection
• Rise time accelerators, SDA, SCL hot-swapping, thermal shutdown
• Very low shutdown current, stuck bus disconnect and recovery
• Input supply voltage range from 3V to 5.5V
• Input supply current is 6.5mA typical at (EN = VCC = 5.5V, SDA = SCL = VSDA,SCL(OL))
• Shutdown input supply current is 0.1µA typical at (EN = 0V, VCC = 5.5V)
• Maximum SCL clock frequency is 100KHz minimum at (TA = 25°C, VCC = 3.3V)
• SCL, SDA input capacitance is 10pF maximum at (SCL, SDA = VCC, TA = 25°C)
• Operating temperature range from 0°C to 70°C, 10-lead plastic MSOP package

Notes

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