SMH4042A
DESCRIPTION
TheSMH4042Aisafullyintegratedhotswapcontrollerthat Theinternal512×8E2PROMcanbeusedasconfiguration
providescompletepowercontrolforadd-incardsrangingin memory for the individual card or as general purpose
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. Utilizingexternallowon-resistanceN-channel
MOSFETs, card power is ramped by two high-side driver
outputs that are slew-rate limited at 250V/s.
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.
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.
PIN CONFIGURATION
1
2
3
4
5
6
7
8
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VCC
VGATE5
nc
CARD_5V_MON
CBI_3
HST_3V_MON
VGATE3
CARD_3V_MON
LOCAL_PCI_RST
SCL
CBI_5
DRVREN#
ISLEW
FAULT#
1VREF
VSEL
PWR_EN
A0
9
LOCAL_PCI_RST#
A1
10
11
12
13
14
SDA
A2
PCI_RST#
SGNL_VLD#
HEALTHY#
BD_SEL2#
BD_SEL1#
GND
2070 PCon
2070 9.1 5/27/03
SUMMIT MICROELECTRONICS, Inc.
2
SUMMIT [ SUMMIT MICROELECTRONICS, INC. ]
