SP706SEN-L/TR Exar Corporation, SP706SEN-L/TR Datasheet

Low Power Microprocessor Supervisory Circuits

SP706SEN-L/TR

Manufacturer Part Number
SP706SEN-L/TR
Description
Low Power Microprocessor Supervisory Circuits
Manufacturer
Exar Corporation
Type
Simple Reset/Power-On Resetr
Datasheets

Specifications of SP706SEN-L/TR

Number Of Voltages Monitored
1
Reset
Active Low
Reset Timeout
140 ms Minimum
Voltage - Threshold
2.93V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Monitored Voltage
2.93 V
Undervoltage Threshold
0.6 V
Overvoltage Threshold
3.85 V
Output Type
Active Low
Manual Reset
Resettable
Watchdog
Watchdog
Battery Backup Switching
No Backup
Power-up Reset Delay (typ)
200 ms
Supply Voltage (max)
5.5 V
Supply Voltage (min)
1 V
Supply Current (typ)
25 uA
Maximum Power Dissipation
727 mW
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Power Fail Detection
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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June 2010
GENERAL DESCRIPTION
The SP706R/S/T and SP708R/S/T series is a
family of microprocessor (µP) supervisory
circuits that integrate myriad components
involved in discrete solutions which monitor
power-supply and battery in µP and digital
systems.
The SP706R/S/T and SP708R/S/T series will
significantly improve system reliability and
operational
solutions obtained with discrete components.
The
SP708R/S/T series include a watchdog timer, a
µP reset, a Power Fail Comparator, and a
manual-reset input.
The SP706R/S/T and SP708R/S/T series is
ideal
automotive systems, computers, controllers,
and intelligent instruments. The SP706R/S/T
and SP708R/S/T series is an ideal solution for
systems in which critical monitoring of the
power supply to the µP and related digital
components is demanded.
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
Part Number
SP706R
SP706S
SP708R
SP708S
SP706T
SP708T
features
for
3.0V
efficiency
RESET Threshold
of
or
2.63V
2.93V
3.08V
2.63V
2.93V
3.08V
the
3.3V
when
SP706R/S/T
applications
3
3
compared
.
.
0
0
RESET Active
Low and High
Low and High
Low and High
V
V
/
/
3
3
Low
Low
Low
.
.
3
3
and
V
V
to
in
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APPLICATIONS
FEATURES
P
• Processors & DSPs Based Systems
• Industrial & Medical Instruments
• Precision Low Voltage Monitor
• 200ms RESET Pulse Width
• Independent Watchdog Timer
• 40µA Maximum Supply Current
• Debounced TTL/CMOS Manual Reset
• RESET Asserted Down to V
• V
• Voltage Monitor for Power Failure or
• 8-Pin NSOIC and MSOP Packages
• Pin Compatible with Industry
P
Manual RESET
o
o
− SP706R/SP708R: +2.63V
− SP706S/SP708S: +2.93V
− SP706T/SP708T: +3.08V
− SP706R/S/T: Active Low
− SP708R/S/T: Active High and Active Low
− 1.6s Timeout (SP706R/S/T)
− Enable/Disable Function
Input
Low Battery Warning
Standards 706R/S/T and 708R/S/T
w
w
S
CC
Tel. +1 510 668-7000 – Fax. +1 510 668-7001
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PFI Accuracy
www.exar.com
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Related parts for SP706SEN-L/TR

SP706SEN-L/TR Summary of contents

Page 1

... SP708R/S/T series is an ideal solution for systems in which critical monitoring of the power supply to the µP and related digital components is demanded. Part Number RESET Threshold SP706R 2.63V SP706S 2.93V SP706T 3.08V SP708R 2.63V SP708S 2.93V SP708T 3.08V Exar Corporation 48720 Kato Road, Fremont CA 94538, USA ...

Page 2

... Watchdog Timeout Period t WD WDI Pulse Width t (note 1) WP WDI Input Threshold V IL 0.7xV WDI Input Current WDO Output Voltage 0.8xV Pull-up Current © 2010 Exar Corporation ESD Rating (HBM - Human Body Model) .................... 2kV Continuous Power Dissipation SO (derate 5.88mW/°C above +70°C) ...............471mW Mini SO (derate 4.10mW/° ...

Page 3

... Parameter MR Pulse Width Input Threshold V IL 0.7xV Reset Out Delay t MD PFI Input Threshold PFI Input Current PFO Output Voltage 0.8xV Note 1:WDI minimum rise /fall time is 1µs. BLOCK DIAGRAM © 2010 Exar Corporation Min. Typ. Max. Units 500 ns 150 ...

Page 4

... PIN ASSIGNMENT © 2010 Exar Corporation Fig. 2: SP708R/S/T Block Diagram Fig. 3: Pin Assignment 4/ Rev. 2.0 ...

Page 5

... A SP706REN-L/TR -40°C≤T ≤+85°C A SP706REU-L -40°C≤T ≤+85°C A SP706REU-L/TR -40°C≤T ≤+85°C A SP706SCN-L 0°C≤T ≤+70°C A SP706SCN-L/TR 0°C≤T ≤+70°C A SP706SCU-L 0°C≤T ≤+70°C A SP706SCU-L/TR 0°C≤T ≤+70°C A © 2010 Exar Corporation ...

Page 6

... Temperature Part Number Range SP706SEN-L -40°C≤T ≤+85°C A SP706SEN-L/TR -40°C≤T ≤+85°C A SP706SEU-L -40°C≤T ≤+85°C A SP706SEU-L/TR -40°C≤T ≤+85°C A SP706TCN-L 0°C≤T ≤+70°C A SP706TCN-L/TR 0°C≤T ≤+70°C A SP706TCU-L 0°C≤T ≤+70°C A SP706TCU-L/TR 0°C≤T ≤ ...

Page 7

... TYPICAL PERFORMANCE CHARACTERISTICS All data taken 2.7V to 5.5V (SP70xR unless otherwise indicated. Fig. 4: Power-Fail Comparator De-Assertion Response Time Fig. 6: Power-Fail Comparator Assertion Response Time Fig. 8: SP706 RESET Output Voltage vs. Supply Voltage © 2010 Exar Corporation 3.15V to 5.5V (SP70xS De-Assertion Response Time Circuit Fig ...

Page 8

... Fig. 10: SP706 RESET Response Time Fig. 12: SP708 RESET and RESET Assertion Fig. 14: SP708 RESET and RESET Assertion and De-Assertion Circuit © 2010 Exar Corporation Fig. 11: SP706 RESET Response Time Circuit Fig. 13: SP708 RESET and RESET De-Assertion 8/ Rev. 2.0 ...

Page 9

... Fig. 15: SP708 RESET Output Voltage vs. Supply Voltage Fig. 17: SP708 RESET Output Voltage vs. Supply Voltage © 2010 Exar Corporation Fig. 16: SP708 RESET Response Time and SP813L RESET Response Time Circuit 9/ Rev. 2.0 ...

Page 10

... On power-up, once V reaches 1V, RESET guaranteed logic LOW of 0.4V or less rises, RESET stays LOW. When V the reset threshold, an internal timer releases RESET after 200ms. RESET whenever V dips below the reset threshold, CC such brownout condition. When a © 2010 Exar Corporation ...

Page 11

... PFI pin to a voltage divider as shown in Figure 20. Choose the voltage divider ratio so that the voltage at PFI falls below 1.25V just before the +5V regulator drops out. Use PFO to interrupt the µ can prepare for an orderly power-down. Fig. 20: Typical Operating Circuit © 2010 Exar Corporation ...

Page 12

... SP706R/S/T-SP708R/S/T series will keep RESET asserted (where RESET = LOW and RESET = HIGH). Note that this circuit's accuracy depends on the tolerance, the V line, and the resistors. CC Fig. 21: Monitoring +3.3V/+3.0V and +12V Power Supplies Fig. 22: Monitoring a Negative Voltage Supply © 2010 Exar Corporation ...

Page 13

... Fig. 24: Maximum Transient Duration without Causing a Reset Pulse vs. Reset Comparator Overdrive APPLICATIONS The SP706P/R/S/T-SP708R/S/T series offers unmatched performance and the lowest power consumption for these industry devices. Refer to Figures 25 and 26 for supply current performance characteristics against temperature and supply voltages. © 2010 Exar Corporation ...

Page 14

... PACKAGE SPECIFICATION 8-P NSOIC IN © 2010 Exar Corporation 14/ Rev. 2.0 ...

Page 15

... MSOP IN © 2010 Exar Corporation 15/ Rev. 2.0 ...

Page 16

... While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized ...

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