SMH4042A Datasheet, PDF (2/28 Pages) Summit Microelectronics, Inc. – Distributed Power Hot-Swap Controller for CompactPCI

SMH4042A
DESCRIPTION
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.
The internal 512 × 8 E²PROM can be used as configuration
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.
PIN CONFIGURATION
CBI_5 1
DRVREN# 2
ISLEW 3
FAULT# 4
1VREF 5
VSEL 6
PWR_EN 7
A0 8
LOCAL_PCI_RST# 9
A1 10
A2 11
BD_SEL2# 12
BD_SEL1# 13
GND 14
28 VCC
27 VGATE5
26 nc
25 CARD_5V_MON
24 CBI_3
23 HST_3V_MON
22 VGATE3
21 CARD_3V_MON
20 LOCAL_PCI_RST
19 SCL
18 SDA
17 PCI_RST#
16 SGNL_VLD#
15 HEALTHY#
2070 PCon
2
2070 9.1 5/27/03
SUMMIT MICROELECTRONICS, Inc.