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SMH4042ASALM Datasheet(PDF) 2 Page - Summit Microelectronics, Inc. |
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SMH4042ASALM Datasheet(HTML) 2 Page - Summit Microelectronics, Inc. |
2 / 28 page 2 SMH4042A 2070 9.1 5/27/03 SUMMIT MICROELECTRONICS, Inc. PIN CONFIGURATION The SMH4042A is a fully integrated hot swap controller that provides complete power control for add-in cards ranging in use for basic hot swap systems to high availability CompactPCI systems. It detects proper insertion of the card and senses valid supply voltage levels at the backplane. Utilizing external low on-resistance N-channel MOSFETs, card power is ramped by two high-side driver outputs that are slew-rate limited at 250V/s. The SMH4042A continuously monitors the host supplies, the add-in card supplies and the add-in card current. If the SMH4042A detects the current is higher than the programmed value it will shut down the MOSFETs and issue a fault status back to the host. DESCRIPTION The internal 512 ×8E2PROMcanbeusedasconfiguration memory for the individual card or as general purpose memory. The proprietary Data Download mode provides a more direct interface to the E2PROM, simplifying access by the add-in card’s controller or ASIC. Programming of configuration, control and calibration values by the user can be simplified with the interface adapter and Windows GUI software obtainable from Summit Microelectronics. CBI_5 DRVREN# ISLEW FAULT# 1VREF VSEL PWR_EN A0 LOCAL_PCI_RST# A1 A2 BD_SEL2# BD_SEL1# GND VCC VGATE5 nc CARD_5V_MON CBI_3 HST_3V_MON VGATE3 CARD_3V_MON LOCAL_PCI_RST SCL SDA PCI_RST# SGNL_VLD# HEALTHY# 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 2070 PCon |
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