Datasheet Microchip MIC1815

Manufacturer	Microchip
Series	MIC1815

The MIC1815 is an inexpensive microprocessor supervisory circuit that monitors power supplies in microprocessor based systems

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MIC1815 Micrel MIC1815
Microprocessor Reset Circuit General Description Features The MIC1815 is an inexpensive microprocessor supervisory
circuit that monitors power supplies in microprocessor based
systems.
The function of these devices is to assert a reset if the power
supply drops below a designated reset threshold level. Several
different reset threshold levels are available to accommodate
10% or 20% drop in 3.3V powered systems.
The MIC1815 has an active low /RESET output. The reset
output is guaranteed to remain asserted for a minimum of
100ms after VCChas risen above the designated reset threshold level. The MIC1815 comes in a 3-pin SOT-23 package. Precision voltage monitor for 10% or 20% drop in 3.3V
power supplies /RESET remains valid with VCC as low as 1V 5ВµA supply current 100ms minimum reset pulse width No external components required Available in 3-pin SOT-23 package Ordering Information Applications Portable equipment
Intelligent instruments
Critical microprocessor power monitoring
Printers/computers
Embedded controllers Part Number Marking Threshold
Voltage Operating Temp. Range Package Pb-Free MIC1815-10U ND 2.88V вЂ“40В°C to +85В°C SOT-23 No MIC1815-20U NE 2.55V вЂ“40В°C to +85В°C SOT-23 No MIC1815-10UY ND 2.88V вЂ“40В°C to +85В°C SOT-23 Yes MIC1815-20UY NE 2.55V вЂ“40В°C to +85В°C SOT-23 Yes Typical Application
VCC VCC VCC MIC1815 ВµP RESET RESET Micrel, Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 474-1000 fax + 1 (408) 944-0970 http://www.micrel.com July 2005 1 MIC1815 MIC1815 Micrel Pin Conп¬Ѓguration RESET 1 MIC1815 3 GND VCC 2 3-Lead SOT23 Pin Description
Pin Number Pin Name 1 /RESET MIC1815 Pin Function
/RESET goes low if VCC falls below the reset threshold and remains asserted for one reset timeout period (100ms min) after VCC exceeds the reset
threshold. 2 VCC Power supply input. 3 GND IC ground pin 2 July 2005 MIC1815 Micrel Absolute Maximum Ratings(Note 1) Operating Ratings(Note 2) Terminal Voltage (VCC) .вЂ“0.3V to +6V
Input Current (VCC). 20mA
Output Current (/RESET) . 20mA …

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Status

	MIC1815-10UY-TR	MIC1815-20UY-TR
Lifecycle Status	Production (Appropriate for new designs but newer alternatives may exist)	Production (Appropriate for new designs but newer alternatives may exist)

Packaging

	MIC1815-10UY-TR	MIC1815-20UY-TR
N	1	2
Package	SOT-23	SOT-23
Pins	3	3

Parametrics

Parameters / Models	MIC1815-10UY-TR	MIC1815-20UY-TR
Manual Reset	No	No
Nominal Reset Voltage, V	2.55, 2.88	2.55, 2.88
Operating Temp. Range, °C	-40 to 85	-40 to 85
Operating Temperature Range, °C	-40 to +85	-40 to +85
Output	Push-Pull	Push-Pull
Power Fail	No	No
Product Type	Supervisor	Supervisor
Reset Type	Active Low	Active Low
Typical Reset Pulse Width, ms	100	100
Typical Supply Current, µA	5	5
VCC Range, V	1.5 - 5.5	1.5 - 5.5
Watchdog Timer	No	No

Eco Plan

	MIC1815-10UY-TR	MIC1815-20UY-TR
RoHS	Compliant	Compliant

Model Line

Series: MIC1815 (2)

MIC1815-10UY-TR MIC1815-20UY-TR

Manufacturer's Classification

Power Management > Voltage Detectors