July, 2004

1

M9999-071504

MIC6315

Micrel

MIC6315

Open-Drain

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

risen above the designed reset threshold level. The MIC6315

comes in a 4-pin SOT-143 package.

Typical Application

VCC

RESET

µP

RESET

VCC

MIC6315

VCC

MR

10k

Features

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

supplies

• /RESET remains valid with V

• <15

µA 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

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com