參數(shù)資料
型號(hào)： SMS47GR07
廠商： Summit Microelectronics, Inc.
英文描述： Quad Programmable Precision Cascade Sequencer and Supervisory Controller
中文描述： 四可編程精密級(jí)聯(lián)序列和監(jiān)督控制器
文件頁(yè)數(shù)： 1/19頁(yè)
文件大?。?/td> 923K
代理商： SMS47GR07
1
Characteristics subject to change without notice
2087 1.1 04/11/05
SMS47
SUMMIT
MICROELECTRONICS, Inc.
SUMMIT MICROELECTRONICS, Inc., 2005 1717 Fox Dr. San Jose, CA 95131 Phone 408-436-9890 FAX 408-436-9897
www.summitmicro.com
PRELIMINARY INFORMATION
1
(SEE LAST PAGE)
z
Operational from any of four Voltage Monitoring
Inputs
z
Programmable Power-up Cascade Sequencing
z
Programmability allows monitoring any voltage
between 0.6V and 5.6V with no external
components
z
Programmable 5mV steps in the low range
z
Programmable Watchdog Timer
z
Programmable Reset Pulse Width
z
Programmable Nonvolatile Combinatorial Logic
for generation of Reset
z
Fault Status Register
APPLICATIONS
z
Desktop/Notebook/Tablet Computers
z
Multi-voltage Systems
z
Telecom/Network Servers
z
Portable Battery-powered Equipment
z
Set-top Boxes
z
Data-storage Equipment
Quad Programmable Precision Cascade Sequencer and Supervisory
Controller
FEATURES
INTRODUCTION
The SMS47 is a nonvolatile user-programmable voltage
supply cascade sequencer and supervisory circuit de-
signed specifically for advanced systems that need to
monitor multiple voltages. The SMS47 can monitor four
separate voltages without the need of any external voltage
divider circuitry unlike other devices that need factory-
trimmed threshold voltages and external components to
accommodate different supply voltages and tolerances.
The SMS47 can also be used to enable DC/DC converters
or LDOs to provide a closed loop cascading of the supplies
during power-up.
The SMS47 watchdog timer has a user programmable
time-out period and it can be placed in an idle mode for
system initialization or system debug. All of the functions
are user accessible through an industry standard I
2
C 2-wire
serial interface.
Programming of configuration, control and calibration
values by the user is simplified with the SMX3200 program-
ming adapter and Windows GUI software obtainable from
Summit Microelectronics.
SIMPLIFIED APPLICATION DRAWING
Applications Schematic using the SMS47 Controller to provide closed loop power-up cascade sequenc-
ing and supervisory functions.
NOTE: THIS IS AN APPLICATIONS EXAMPLE ONLY. SOME PINS, COMPONENTS AND VALUES ARE NOT SHOWN.
2047 SAD 2.0
V0
V1
V2
V3
RESET#
PUP#1
VDD_CAP
PUP#2
PUP#3
I
2
C
5V
3.3V
2.5V
1.8V
DC/DC
DC/DC
LDO
SMS47
A2
A1 SDA SCL
7
6
9
10
1
16
2
3
14
MR#
Reset#
15
WLDI
GND
8
11
12
4
13
5
0.1μF
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