This Product is Not Recommended for New Design and has been replaced by Part# SMH4042A Comments: The device has the SAME FUNCTIONALITY and PINOUT as the compared device but is NOT an exact equivalent. The SMH4042A has better characteristics.

Download the entire SMH4042 data sheet in PDF format. Download Summit dongle information (PDF)

RELATIVE APPLICATIONS NOTES: Applications Note 09: - Using the S39421 as the Primary Control Circuit on VME Live Insertion Card Applications Note 15: - CompactPCI® Hot Swap Design Solutions Download a partial listing of suitable MOSFETs for use with the SUMMIT SMH4042 Hot Swap Controller   Application Aids Helpful hints and pointers in PDF format. AA06 SMH4042 with Supply Over-Voltage Shutdown AA11 Sequencing 3.3V and 1.5V with the SMH4042

OVERVIEW The SMH4042 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 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 SMH4042 continuously monitors the host supplies, the add-in card supplies, & the add-in card current. If the SMH4042 detects the current is higher than the programmed value it will shut down the MOSFETs and issue a fault status back to the host. The on board E2PROM can be used as configuration memory for the card or as general purpose memory. The proprietary DataDownload mode provides a more direct interface to the E2PROM, simplifying access by the add-in card's controller or ASIC.   BLOCK DIAGRAM   ORDERING INFORMATION return to top home Copyright©1999-2003 by Summit Microelectronics, Inc.