LTC4300A-3 applicaTions inForMaTion BACKPLANE BACKPLANE CONNECTOR I/O PERIPHERAL CARD 1 VCC2 C1 R1 R2 R7 R8 0.01µF 10k 10k 10k 10k V V V CC CC CC2 SDAOUT CARD_SDA SDA SDAIN LTC4300A-3 SCLOUT CARD_SCL SCL SCLIN C2 GND ENABLE AGGERED CONNECTOR 0.01µF R3 ENA1 ST 10k I/O PERIPHERAL CARD 2 C3 0.01µF R4 R5 10k 10k V V CC CC2 SDAOUT CARD2_SDA SDAIN LTC4300A-3 SCLOUT CARD2_SCL SCLIN C4 GND ENABLE AGGERED CONNECTOR R6 ENA2 0.01µF ST 10k 4300A-3 F04 Figure 4. The LTC4300A-3 in a Custom Application. Making ENABLE the Shortest Pin Ensures thatVCC and VCC2 Connect Before ENABLE Is Allowed to Go High, Connecting the Card to the Backplane5V to 3.3V Level Translator and Power Supply This application also provides power supply redundancy. Redundancy If the VCC2 voltage falls below its UVLO threshold, the Systems requiring different supply voltages for the back- LTC4300A-3 disconnects the backplane from the card, plane side and the card side can use the LTC4300A-3, as so that the backplane can continue to function. If the shown in Figure 5. The pull-up resistors on the card side V CC voltage falls below its UVLO threshold and the V CC2 connect from SDAOUT to SCLOUT to V voltage remains active, hold ENABLE at ground to ensure CC2, and those on the backplane side connect from SDAIN and SCLIN to V proper operation. CC. The LTC4300A-3 functions for voltages ranging from 2.7V to 5.5V on both VCC and VCC2. There is no constraint on the voltage magnitudes of VCC and VCC2 with respect to each other. 4300a3fa 10 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Related Parts Typical Application
