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S393-X, S39421, S39421-09

Table of contents:
Info of S393-X
Info of S39421
Info of S39421-09

S393-X, S39421, S39421-09 Selling Leads, Datasheet

MFG:N/A Package Cooled:SOP-8 D/C:04+

S393-X, S39421, S39421-09 Datasheet download

Five Points

Part Number: S393-X

MFG: N/A

Package Cooled: SOP-8

D/C: 04+

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S39421 General 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.

Once power is switched on, the S39421 continues to monitor the back-end power to the add-in card and the
host power supply. If either the 5V or 3.3V supplies drop below Vtrip the S39421 will immediately assert the RESET
outputs and power-down the add-in card.

In addition to the power control for the add-in card, the S39421 provides status signals that can be employed by
the host and for the control of bus interface components.

The on board E²PROM can be used as configuration memory for the individual card or as general purpose memory. The proprietary DataDownload mode provides a more direct interface to the E²PROM for simplified access by the add-in card's controller or ASIC.

S39421 Maximum Ratings

Temperature Under Bias                     -55 to +125
Storage Temperature                       -65 to +150
Voltage on :
                      DRVREN              VCC12                    15V
                                                  VCC3                      7V
                                            CARD_5V                    7V
                                            CARD_3V                    7V
      SGNL_VLD, CARD_V_VLD & RESET                  12V
                                                 RESET           VCC +.7V
                                           All Others          VCC +.7V
Output Short Circuit Current                             100mA
Lead Solder Temperature (10 secs)                   300

S39421 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]

S39421 Connection Diagram

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