PDF SMH4042S-BKM Data sheet ( Hoja de datos )

Número de pieza	SMH4042S-BKM
Descripción	Hot Swap Controller
Fabricantes	ETC
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No Preview Available ! SUMMIT MICROELECTRONICS, Inc. Hot Swap™ Controller 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 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 VCC5 BD_SEL1# BD_SEL2# CBI_3 CBI_5 HST_3V_MON FAULT# PCI_RST# PWR_EN SGNL_VLD# HEALTHY# - 50mV + - + 50mV + - + - Charge Pump Ref Voltage Slew Rate Control Control Circuitry EEPROM Memory Array A0 A1 A2 SDA SCL 1Vref VGATE3 VGATE5 DRVREN# ASSOCIATE MEMBER LOCAL_PCI_RST# + - + - 1.25V LOCAL_PCI_RST CARD_5V_MON CARD_3V_MON 2037 ILL2.2 SUMMIT MICROELECTRONICS, Inc. • 300 Orchard City Drive, Suite 131 • Campbell, CA 95008 • Telephone 408-378-6461 • Fax 408-378-6586 • www.summitmicro.com © SUMMIT MICROELECTRONICS, Inc. 1999 2037 8.0 8/8/00 Characteristics subject to change without notice 1 1 page VCC or HST_3V_MON SGNL_VLD# & DRVREN# VGATE5 & VGATE3 CARD_5V_MON or CARD_3V_MON LOCAL_PCI_RST# & HEALTHY# tVTPD VTRIP VTRIP tVTR Loss of Voltage Timing Sequence SMH4042 2037 ILL4.0 PCI_RST# LOCAL_PCI_RST# RESET tPRLPR tPURST tPURST Host Initiated Reset Timing Diagram CBI_5 or CBI_3 FAULT# VGATE5 & VGATE3 PCI_RST# tCBTC Circuit Breaker Timing Diagram 5 2037 ILL5.0 2037 ILL6.0 2037 8.0 8/8/00 5 Page SMH4042 VCC ≥ 1V ASSERT RESET OUTPUTS SHUT OFF VGATE5 VGATE3 DRVREN# HEALTHY# SGNL-VLD# BD_SEL1# & BD_SEL2# YES NO VSEL HI ? YES NO NO HOST YES 3VOLT OK? HOST 5V & 3V OK? YES TURN-ON VGATE5 VGATE3 DRVREN NO CARD_5V_MON CARD_3V_MON YES NO START TIMER tPURST TURN ON HEALTHY# tPURST TIMEOUT? YES NO PCI_RST# RELEASED? YES NO RELEASE RESETS Figure 1. Sequence Flow Diagram 11 TURN ON SGNL_VLD 2037 ILL14.2 2037 8.0 8/8/00 11 Page

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