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SP705 Datasheet Preview

SP705 Datasheet

Low Power Microprocessor Supervisory Circuits

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June 2011
SP705-SP708-SP813L
Low Power Microprocessor Supervisory Circuits
Rev. 2.1.0
GENERAL DESCRIPTION
The SP705-708/813L series is a family of
microprocessor (µP) supervisory circuits that
integrate myriad components involved in
discrete solutions which monitor power-supply
and battery in mP and digital systems.
The SP705-708/813L series will significantly
improve system reliability and operational
efficiency when compared to solutions
obtained with discrete components. The
features of the SP705-708/813L series include
a watchdog timer, a µP reset, a Power Fail
Comparator, and a manual-reset input.
The SP705-708/813L series is ideal for
applications in automotive systems,
computers, controllers, and intelligent
instruments. The SP705-708/813L series is an
ideal solution for systems in which critical
monitoring of the power supply to the µP and
related digital components is demanded.
APPLICATIONS
Processors & DSPs Based Systems
Industrial & Medical Instruments
FEATURES
Precision Voltage Monitor
SP705/SP707/SP813L: 4.65V
SP706/SP708: 4.40V
200ms RESET Pulse Width
Independent Watchdog Timer
1.6s Timeout (SP705/SP706/SP813L)
60µA Maximum Supply Current
Debounced TTL/CMOS Manual Reset
Input
RESET Asserted Down to VCC=1.1V
Voltage Monitor for Power Failure or
Low Battery Warning
8-Pin PDIP, NSOIC and MSOP Packages
Pin Compatible with Industry
Standards 705-708-813L Series
Functionally Compatible to Industry
Standard 1232 Series
Part Number
SP705
SP706
SP707
SP708
SP813L
RESET Threshold
4.65V
4.40V
4.65V
4.40V
4.65V
RESET Active
Low
Low
Low and High
Low and High
High
Manual RESET
Yes
Yes
Yes
Yes
Yes
Watchdog
Yes
Yes
No
No
Yes
PFI Accuracy
4%
4%
4%
4%
4%
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. +1 510 668-7000 – Fax. +1 510 668-7001




Exar

SP705 Datasheet Preview

SP705 Datasheet

Low Power Microprocessor Supervisory Circuits

No Preview Available !

SP705-SP708-SP813L
Low Power Microprocessor Supervisory Circuits
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of
the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may affect
reliability.
VCC .......................................................... -0.3V to 6.0V
All Other Inputs (Note 1) ...................-0.3V to (VCC+0.3V)
Input Current
VCC .................................................................20mA
GND ................................................................20mA
Output Current (All outputs) ...............................20mA
ESD Rating (HBM - Human Body Model) .................... 4kV
Continuous Power Dissipation
Plastic DIP (derate 9.09mW/°C above +70°C) ....727mW
SO (derate 5.88mW/°C above +70°C)...............471mW
Mini SO (derate 4.10mW/°C above +70°C) ........330mW
Storage Temperature ..............................-65°C to 160°C
Lead Temperature (Soldering, 10 sec) ....................300°C
ELECTRICAL SPECIFICATIONS
Unless otherwise indicated, VCC = 4.75V to 5.5V (SP705-SP707-SP813L), VCC = 4.50V to 5.5V (SP706-SP708), TA= TMIN to
TMAX, typical at 25°C.
Parameter
Operating Voltage Range VCC
Supply Current ISUPPLY
Reset Threshold
Reset Threshold Hysteresis
Reset Pulse Width tRS
RESET Output Voltage
Watchdog Timeout Period tWD
WDI Pulse Width tWP
WDI Input Threshold Low
WDI Input Threshold High
WDI Input Current
WDO Output Voltage
MR Pull-up Current
MR Pulse Width tMR
MR Input Threshold Low
MR Input Threshold High
MR to Reset Out Delay tMD
PFI Input Threshold
PFI Input Current
PFO Output Voltage
Min.
1.1
4.50
4.25
140
VCC-1.5
0.8
Typ.
40
4.65
4.40
40
200
1.00
100
1.60
3.5
-75
VCC-1.5
100
150
30
-20
250
2.0
1.20
-25.00
VCC-1.5
1.25
0.01
Max.
5.5
60
4.75
4.50
280
Units
V
µA
V
mV
ms
0.4
0.3
2.25
0.8
75
0.4
600
0.8
250
1.30
25.00
0.4
V
s
ns
V
V
µA
µA
V
µA
ns
V
ns
V
nA
V
Conditions
MR=VCC or floating, WDI floating
SP705, SP707, SP813L
SP706, SP708 (Note 2)
Note 2
Note 2
ISOURCE=800µA, Note 2
ISOURCE=4µA, VCC=1.1V, Note 2
ISINK=3.2mA, Note 2
ISINK=100µA, VCC=1.2V, Note 2
SP705, SP707, SP813L
VIL=0.4V, VIH=0.8xVCC
SP705, SP707, SP813L
VCC=5V
SP705, SP707, SP813L, WDI=VCC
SP705, SP707, SP813L, WDI=0V
ISOURCE=800µA
ISINK=3.2mA
MR = 0V
Note 2
VCC=5V
ISOURCE=800µA
ISINK=3.2mA
Note 1: The input voltage limits on PFI and MR can be exceeded if the input current is less than 10mA.
Note 2: Applies to both RESET in the SP705-SP708 and RESET in the SP707/708/813L/813M.
© 2011 Exar Corporation
2/17
Rev. 2.1.0


Part Number SP705
Description Low Power Microprocessor Supervisory Circuits
Maker Exar
Total Page 17 Pages
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