MIC6315
Micrel
MIC6315
Open-Drain µP Reset Circuit
General Description
The MIC6315 is an inexpensive reset generator circuit that
monitors power supplies in microprocessor based sys-
tems.
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 sup-
plies
• /RESET remains valid with V
CC
as low as 1V
• 5µA supply current
• 20ms, 140ms, 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
VCC
10k
MIC6315
MR
RESET
µP
RESET
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
September 2008
1
M9999-091608
MICREL [ MICREL SEMICONDUCTOR ]
