MIC6315 Datasheet, PDF (1/6 Pages) Micrel Semiconductor – Open-Drain UP Reset Circuit

MIC6315
MIC6315
Open-Drain µP Reset Circuit
Micrel
General Description
The MIC6315 is an inexpensive reset generator circuit that
monitors power supplies in microprocessor based systems.
The function of this device is to assert a reset if either the
power supply drops below a designated reset threshold level
or /MR is forced low. Several different reset threshold levels
are available to accommodate 3V, 3.3V or 5V powered
systems.
The MIC6315 has an active low, open-drain /RESET output.
The reset output is guaranteed to remain asserted for a
minimum of either 20ms, 140ms, or 1100ms after V_CC has
risen above the designed reset threshold level. The MIC6315
comes in a 4-pin SOT-143 package.
Features
• Precision voltage monitor for 3V, 3.3V or 5V power
supplies
• /RESET remains valid with V_CC as low as 1.4V
• <15µA supply current
• 20ms, 40ms, or 1100ms minimum reset pulse widths
available
• Manual reset input
• 4-pin SOT-143 package
Applications
• Portable equipment
• Intelligent instruments
• Critical microprocessor power monitoring
• Printers/computers
• Embedded controllers
Typical Application
VCC
VCC
10k
MIC6315
RESET
MR
VCC
µP
RESET
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com
July, 2004
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M9999-071504