MIC6315

Open-Drain µP Reset Circuit

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

has risen above the designed reset threshold level. The

MIC6315 is available in a 4-pin SOT-143 package.

Datasheets and support documentation are available on

Micrel’s web site at: www.micrel.com.

Features

• Precision voltage monitor for 3V, 3.3V, or 5V power

supplies

• /RESET remains valid with V

•

5μA supply current

• 20ms, 140ms, or 1100ms minimum reset pulse widths

available

• Manual reset input

• Available in 4-pin SOT-143 package

Applications

• Portable equipment

• Intelligent instruments

• Critical microprocessor power monitoring

• Printers/computers

• Embedded controllers

Typical Application

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

October 17, 2014

Revision 2.0