SP705-SP708-SP813L
Low Power Microprocessor Supervisory Circuits
June 2010
Rev. 2.0.0
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 V
CC
=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
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.
V
CC
.......................................................... -0.3V to 6.0V
All Other Inputs (Note 1) ................... -0.3V to (V
CC
+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, V
CC
= 4.75V to 5.5V (SP705-SP707-SP813L), V
CC
= 4.50V to 5.5V (SP706-SP708), T
A
= T
MIN
to
T
MAX
, typical at 25°C.
Parameter
Operating Voltage Range V
CC
Supply Current I
SUPPLY
Reset Threshold
Reset Threshold Hysteresis
Reset Pulse Width t
RS
140
V
CC
-1.5
RESET Output Voltage
0.8
0.4
0.3
Watchdog Timeout Period t
WD
WDI Pulse Width t
WP
WDI Input Threshold Low
WDI Input Threshold High
WDI Input Current
WDO
Output Voltage
MR
Pull-up Current
MR
Pulse Width t
MR
MR
Input Threshold Low
MR
Input Threshold High
MR
to Reset Out Delay t
MD
PFI Input Threshold
PFI Input Current
PFO
Output Voltage
1.20
-25.00
V
CC
-1.5
0.4
1.25
0.01
2.0
250
1.30
25.00
3.5
30
-75
V
CC
-1.5
0.4
100
150
0.8
250
600
-20
75
1.00
1
0.8
1.60
2.25
s
µs
V
V
µA
µA
V
µA
ns
V
ns
V
nA
V
I
SOURCE
=800µA
I
SINK
=3.2mA
Note 2
V
CC
=5V
V
4.50
4.25
Min.
1.1
40
4.65
4.40
40
200
280
Typ.
Max.
5.5
60
4.75
4.50
Units
V
µA
V
mV
ms
MR=V
CC
or floating, WDI floating
SP705, SP707, SP813L
SP706, SP708 (Note 2)
Note 2
Note 2
I
SOURCE
=800µA, Note 2
I
SOURCE
=4µA, V
CC
=1.1V, Note 2
I
SINK
=3.2mA, Note 2
I
SINK
=100µA, V
CC
=1.2V, Note 2
SP705, SP707, SP813L
V
IL
=0.4V, V
IH
=0.8xV
CC
SP705, SP707, SP813L
V
CC
=5V
SP705, SP707, SP813L, WDI=V
CC
SP705, SP707, SP813L, WDI=0V
I
SOURCE
=800µA
I
SINK
=3.2mA
MR
= 0V
Conditions
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.
© 2010 Exar Corporation
2/17
Rev. 2.0.0
SP705-SP708-SP813L
Low Power Microprocessor Supervisory Circuits
BLOCK DIAGRAM
Fig. 1: SP705-SP706-SP813L Block Diagram
Fig. 2: SP707-SP708 Block Diagram
© 2010 Exar Corporation
3/17
Rev. 2.0.0
SP705-SP708-SP813L
Low Power Microprocessor Supervisory Circuits
PIN ASSIGNMENT
Fig. 3: Pin Assignment
PIN DESCRIPTION
Pin Number
Name
SP705-SP706
SOIC
MSOP
SP707-SP708
SOIC
MSOP
SP813L
DIP
SOIC
Description
Manual Reset
This input triggers a reset pulse when pulled below 0.8V. This
active LOW input has an internal 250µA pull-up current. It
can be driven from a TTL or CMOS logic line or shorted to
ground with a switch.
+5V power supply
Ground reference for all signals
Power-Fail Input
When this voltage monitor input is less than 1.25V,
PFO
goes
LOW. Connect PFI to ground or V
CC
when not in use.
Power-Fail Output
This output is LOW until PFI is less then 1.25V
Watchdog Input
If this input remains HIGH or LOW for 1.6s, the internal
watchdog timer times out and
WDO
goes LOW. Floating WDI
or connecting WDI to a high-impedance tri-state buffer
disables the watchdog feature. The internal watchdog timer
clears whenever
RESET
is asserted, WDI is tri-stated, or
whenever WDI sees a rising or falling edge.
No Connect
Active-LOW
RESET
Output
This output pulses LOW for 200ms when triggered and stays
LOW whenever V
CC
is below the reset threshold (4.65V for the
SP705/707/813L and 4.40V for the SP706/708). It remains
LOW for 200ms after V
cc
rises above the reset threshold or
MR
goes from LOW to HIGH. A watchdog timeout will not
trigger
RESET
unless
WDO
is connected to
MR.
MR
1
3
1
3
1
V
CC
GND
PFI
PFO
2
3
4
5
4
5
6
-
2
3
4
5
4
5
6
7
2
3
4
5
WDI
6
8
-
-
6
N.C.
-
-
6
8
-
RESET
7
1
7
1
-
© 2010 Exar Corporation
4/17
Rev. 2.0.0
SP705-SP708-SP813L
Low Power Microprocessor Supervisory Circuits
Pin Number
Name
SP705-SP706
SOIC
MSOP
SP707-SP708
SOIC
MSOP
SP813L
DIP
SOIC
Description
Watchdog Output
This output pulls LOW when the internal watchdog timer
finishes its 1.6s count and does not go HIGH again until the
watchdog is cleared.
WDO
also goes LOW during low-line
conditions. Whenever V
CC
is below the reset threshold, WDO
stays LOW. However, unlike
RESET, WDO
does not have a
minimum pulse width. As soon as V
CC
is above the reset
threshold,
WDO
goes HIGH with no delay.
Active-HIGH RESET Output
This output is the complement of
RESET.
Whenever RESET is
HIGH,
RESET
is LOW and vice-versa. Note that the SP813L
has a reset output only.
WDO
8
2
-
-
8
RESET
-
-
8
2
7
ORDERING INFORMATION
Part Number
SP705CN-L
SP705CN-L/TR
SP705EN-L
SP705EN-L/TR
SP705CU-L
SP705CU-L/TR
SP706CN-L
SP706CN-L/TR
SP706EN-L
SP706EN-L/TR
SP706CU-L
SP706CU-L/TR
SP707CN-L
SP707CN-L/TR
SP707EN-L
SP707EN-L/TR
SP707CU-L
SP707CU-L/TR
SP708CN-L
SP708CN-L/TR
SP708EN-L
SP708EN-L/TR
SP813LCN-L
SP813LCN-L/TR
SP813LEN-L
SP813LEN-L/TR
SP813LCP-L
SP813LEP-L
Temperature
Range
0°C≤T
A
≤+70°C
0°C≤T
A
≤+70°C
-40°C≤T
A
≤+85°C
-40°C≤T
A
≤+85°C
0°C≤T
A
≤+70°C
0°C≤T
A
≤+70°C
0°C≤T
A
≤+70°C
0°C≤T
A
≤+70°C
-40°C≤T
A
≤+85°C
-40°C≤T
A
≤+85°C
0°C≤T
A
≤+70°C
0°C≤T
A
≤+70°C
0°C≤T
A
≤+70°C
0°C≤T
A
≤+70°C
-40°C≤T
A
≤+85°C
-40°C≤T
A
≤+85°C
0°C≤T
A
≤+70°C
0°C≤T
A
≤+70°C
0°C≤T
A
≤+70°C
0°C≤T
A
≤+70°C
-40°C≤T
A
≤+85°C
-40°C≤T
A
≤+85°C
0°C≤T
A
≤+70°C
0°C≤T
A
≤+70°C
-40°C≤T
A
≤+85°C
-40°C≤T
A
≤+85°C
0°C≤T
A
≤+70°C
-40°C≤T
A
≤+85°C
Marking
SP705C
YYWWL
#
SP705E
YYWWL
#
705C
#
YWW
SP706C
YYWWL
#
SP706E
YYWWL
#
706C
#
YWW
SP707C
YYWWL
#
SP707E
YYWWL
#
707C
#
YWW
SP708C
YYWWL
#
SP708E
YYWWL
#
SP813LC
YYWWL
#
SP813LE
YYWWL
#
SP813LC
YWWL#
SP813LE
YWWL#
Package
8-pin NSOIC
Packing
Quantity
Bulk
Note 1
Lead Free
Note 2
8-pin NSOIC 2.5K/Tape & Reel Lead Free
Bulk
8-pin NSOIC
Lead Free
8-pin NSOIC 2.5K/Tape & Reel Lead Free
Bulk
8-pin MSOP
Lead Free
8-pin MSOP 2.5K/Tape & Reel Lead Free
8-pin NSOIC
Bulk
Lead Free
8-pin NSOIC 2.5K/Tape & Reel Lead Free
Bulk
8-pin NSOIC
Lead Free
8-pin NSOIC 2.5K/Tape & Reel Lead Free
8-pin MSOP
Bulk
Lead Free
8-pin MSOP 2.5K/Tape & Reel Lead Free
8-pin NSOIC
Bulk
Lead Free
8-pin NSOIC 2.5K/Tape & Reel Lead Free
Bulk
8-pin NSOIC
Lead Free
8-pin NSOIC 2.5K/Tape & Reel Lead Free
Bulk
8-pin MSOP
Lead Free
8-pin MSOP 2.5K/Tape & Reel Lead Free
8-pin NSOIC
Bulk
Lead Free
8-pin NSOIC 2.5K/Tape & Reel Lead Free
Bulk
8-pin NSOIC
Lead Free
8-pin NSOIC 2.5K/Tape & Reel Lead Free
8-pin NSOIC
Bulk
Lead Free
8-pin NSOIC 2.5K/Tape & Reel Lead Free
Bulk
8-pin NSOIC
Lead Free
2.5K/Tape & Reel Lead Free
8-pin NSOIC
8-pin PDIP
8-pin PDIP
Bulk
Bulk
Lead Free
Lead Free
“YY” = Year – “WW” = Work Week – “#” = Lot Number
© 2010 Exar Corporation
5/17
Rev. 2.0.0
