SP0502BAJTG LITTELFUSE | Alldatasheet
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Technical content
©2009 Littelfuse, Inc 5 Application Guide USB1.1 Considerations:
- Each port operates at either 1.5Mbps or 12Mbps (low and full speed respectively) → Slower speeds can tolerate higher capacitance devices
- Requires 2 channels of data line protection per port (i.e. D+/D-) → A 4 channel device can be useful if protecting a USB stack of 2 ports to make the ESD footprint as small as possible → V BUS can be protected separately with a single channel device (0402 shown) Application Schematic: Recommended SPA Devices: Ordering Number ESD Level (Contact) I/O Capacitance # of Channels VRWM Packaging SP0502BAJTG ±20kV 30pF 2 5.5V SC70-3 SP1001-02XTG ±8kV 12pF 2 5.5V SOT553 SP1001-04XTG ±8kV 12pF 4 5.5V SOT553 SP1003-01DTG ±25kV 30pF 1 5.0V SOD723 Signal GND Case GND USB Controller USB Port SP05Outside World Case GND SP1003 VBUS IC