MCP809, MCP810
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SNVS165A – JUNE 2001 – REVISED MAY 2013
MCP809/MCP810 3-Pin Microprocessor Reset Circuits
Check for Samples: MCP809, MCP810
FEATURES
DESCRIPTION
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The MCP809/810 microprocessor supervisory circuits
can be used to monitor the power supplies in
microprocessor and digital systems. They provide a
reset to the microprocessor during power-up, powerdown and brown-out conditions.
1
2
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Precise Monitoring of 3V, 3.3V, and 5V Supply
Voltages
Fully specified over temperature
140ms min. Power-On Reset Pulse Width,
240ms Typical
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Active-low RESET Output (MCP809)
–
Active-high RESET Output (MCP810)
Specified RESET Output Valid for VCC≥1V
Low Supply Current, 15µA typical
Power supply transient immunity
APPLICATIONS
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Microprocessor Systems
Computers
Controllers
Intelligent Instruments
Portable/Battery-Powered Equipment
Automotive
The function of the MCP809/810 is to monitor the VCC
supply voltage, and assert a reset signal whenever
this voltage declines below the factory-programmed
reset threshold. The reset signal remains asserted for
240ms after VCC rises above the threshold. The
MCP809 has an active-low RESET output, while the
MCP810 has an active-high RESET output.
Seven standard reset voltage options are available,
suitable for monitoring 5V, 3.3V, and 3V supply
voltages.
With a low supply current of only 15µA, the
MCP809/810 are ideal for use in portable equipment.
The MCP809/MCP810 are available in the 3-pin
SOT23 package.
Typical Application Circuit
Figure 1. Typical Application Circuit
Connection Diagram
Figure 2. ( ) are for MCP810
1
2
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2001–2013, Texas Instruments Incorporated
MCP809, MCP810
SNVS165A – JUNE 2001 – REVISED MAY 2013
www.ti.com
Pin Description
PIN
NAME
3
GND
FUNCTION
Ground reference
RESET (MCP809)
Active-low output. RESET remains low while VCC is below the reset threshold, and for 240ms after
VCC rises above the reset threshold.
RESET (MCP810)
Active-high output. RESET remains high while VCC is below the reset threshold, and for 240ms after
VCC rises above the reset threshold.
1
2
VCC
Supply Voltage (+5V, +3.3V, or +3.0V)
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings
(1)
−0.3V to 6.0V
VCC
−0.3V to (VCC+ 0.3V)
RESET, RESET
Input Current, VCC Pin
20mA
Output Current, RESET, RESET Pin
20mA
Rate of Rise, VCC
ESD Rating
100V/µs
(2)
2kV
Continuous Power Dissipation (TA = +70°C)
SOT-23
(3)
320mW
−40°C to +105°C
Ambient Temperature Range
Maximum Junction Temperature
125°C
−65°C to +160°C
Storage Temperature Range
Lead Temperature (soldering, 10sec)
(1)
(2)
(3)
2
+300°C
Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which the
device operates correctly. Operating ratings do not imply specified performance limits. For specified performance limits and associated
test conditions, see the Electrical Characteristics.
The human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin.
Production testing done at TA = +25°C, over temperature limits specified by design only.
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Copyright © 2001–2013, Texas Instruments Incorporated
Product Folder Links: MCP809 MCP810
MCP809, MCP810
www.ti.com
SNVS165A – JUNE 2001 – REVISED MAY 2013
Electrical Characteristics
VCC = full range, TA = −40°C to +105°C, unless otherwise noted. Typical values are at TA = +25°C, VCC = 5V for
4.63/4.38/4.00 versions, VCC = 3.3V for 3.08/2.93 versions, and VCC = 3V for 2.63 version. (1)
Symbol
Parameter
VCC Range
Conditions
Supply Current
TA = −40°C to +105°C
1.2
5.5
TA = +85°C to
+105°C
MCP8_ _ -4.38
MCP8_ _ -4.00
Reset Threshold
(2)
MCP8_ _ -3.08
MCP8_ _ -2.93
MCP8_ _ -2.63
VCC
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