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SMH4042S-BLN Datasheet(PDF) 1 Page - Summit Microelectronics, Inc. |
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SMH4042S-BLN Datasheet(HTML) 1 Page - Summit Microelectronics, Inc. |
1 / 28 page SUMMIT MICROELECTRONICS, Inc. • 300 Orchard City Drive, Suite 131 • Campbell, CA 95008 • Telephone 408-378-6461 • Fax 408-378-6586 • www.summitmicro.com 1 Characteristics subject to change without notice © SUMMIT MICROELECTRONICS, Inc. 1999 2037 8.0 8/8/00 SUMMIT MICROELECTRONICS, Inc. SMH4042 FEATURES • Full Voltage Control for Hot Swap Applications CompactPCI High Availability Compatible - On-board 15V High Side Driver Generation Allows use of Low On-resistance N-Channel FETS - Undervoltage Lockout - Electronic Circuit Breakers - Card Insertion Detection - Host VCC Detection - Card Voltage Sequencing • Flexible Reset Control - Low Voltage Resets - Host Reset Filtering - Soft Reset • Adjustable Power-on Slew Rate • Supports Mixed Voltage Cards • Integrated 4K Bit 2-Wire E2PROM Memory - Data Download™ Mode [Simplifies Downloading of Configuration Memory into Interface ASIC or MCU] APPLICATIONS • CompactPCI Hot Swap Control • VME Live Insertion Control Hot Swap™ Controller DESCRIPTION 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 and the add-in card current. If the SMH4042 detects the current is higher than the pro- grammed 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 individual 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. FUNCTIONAL BLOCK DIAGRAM ASSOCIATE MEMBER VGATE3 VGATE5 BD_SEL1# SGNL_VLD# HEALTHY# VCC5 HST_3V_MON PCI_RST# CARD_3V_MON CARD_5V_MON + - LOCAL_PCI_RST# LOCAL_PCI_RST DRVREN# + - + - EEPROM Memory Array A2 SCL SDA A1 A0 BD_SEL2# + - - - PWR_EN FAULT# 1Vref 1.25V Slew Rate Control Charge Pump Ref Voltage Control Circuitry 50mV 50mV CBI_3 CBI_5 2037 ILL2.2 |
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