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Summit Microelectronics

SMH4042 Datasheet Preview

SMH4042 Datasheet

Hot Swap Controller

No Preview Available !

SUMMIT
MICROELECTRONICS, Inc.
Hot SwapController
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 DownloadMode [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 cards 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




Summit Microelectronics

SMH4042 Datasheet Preview

SMH4042 Datasheet

Hot Swap Controller

No Preview Available !

SMH4042
Symbol
CBI_5
DRVREN#
ISLEW
FAULT#
1Vref
VSEL
PWR_EN
A0
Pin
1
2
3
4
5
6
7
8
LOCAL_PCI_RST# 9
A1
A2
BD_SEL2#
BD_SEL1#
GND
HEALTHY#
SGNL_VLD#
PCI_RST#
SDA
SCL
LOCAL_PCI_RST
10
11
12
13
14
15
16
17
18
19
20
CARD_3V_MON 21
VGATE3
HST_3V_MON
CBI_3
CARD_5V_MON
22
23
24
25
NC
VGATE5
VCC
26
27
28
Description
Circuit Breaker Input (5V)
High Side Driver Enable
Slew Rate Control
Fault Output Active Low
1Volt Reference Output
Voltage Select Input
Power On Enable Input
Memory Address 0
(NC or Gnd)
Back End Reset Output
(Active Low)
Memory Address 1
Memory Address 2
Board Select 2
Board Select 1
Ground
Backend Power On
Signals Valid Output
Host reset input
Serial Data I/O
Serial Clock Input
Back End Reset
Output (Active High)
Card-side 3 Volt
Monitor Input
High Side Drive Output
Host 3V Monitor Input
Circuit Breaker Input (3V)
Card-side 5 Volt
Monitor Input
No Connect
High Side Drive Output
Supply Voltage
2037 PGM T1.2
PIN CONFIGURATIONS SOIC and SSOP
CBI_5 1
DRVREN# 2
ISLEW 3
FAULT#
1Vref
4
5
VSEL
PWR_EN
A0
LOCAL_PCI_RST#
6
7
8
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#
2037 ILL1.2
RECOMMENDED OPERATING CONDITIONS
Condition
Temperature
VCC
Min
-40°C
2.7V
2037 8.0 8/8/00
2
Max
+85°C
5.5V
2037 PGM T2.0


Part Number SMH4042
Description Hot Swap Controller
Maker Summit Microelectronics
Total Page 28 Pages
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