DESCRIPTION

The S39421 is a fully integrated hot swap controller intended for use on add-in cards that may be inserted into or removed from powered-on host platforms. The S39421 performs a variety of tasks starting with the validation of proper card insertion and the presence of “in-spec” voltages at the host platform interface.

FEATURES

• Full Voltage Control for Hot Swap Applications

– Card Insertion Detection

– Platform Voltage Detection

– Card Voltage Sequencing

– 5 Volt, 12 Volt and 3.3 Volt

• 12 Volt FET Enable Outputs

– Allows use of Low On-resistance N-Channel FETS

• Card Reset Generation Based on Out of Spec Voltages

– Host Reset

• Programmable Slew Rate Control [250V/Sec Default Rate]

• Supports 5 Volt, 3.3 Volt and Mixed Voltage Cards

• Integrated 1K Bit E2PROM Memory

• Data Download™ Mode [Simplifies

Downloading of Configuration Memory into Interface ASIC or MCU]