19-0496; Rev 3; 1/99
5-Pin µP Supervisory Circuits with
Watchdog and Manual Reset
________________General Description
The MAX6316–MAX6322 family of microprocessor (µP)
supervisory circuits monitors power supplies and
microprocessor activity in digital systems. It offers sev-
eral combinations of push/pull, open-drain, and bidirec-
tional (such as Motorola 68HC11) reset outputs, along
with watchdog and manual-reset features. The
Selector
Guide
below lists the specific functions available from
each device. These devices are specifically designed
to ignore fast negative transients on V
CC
. Resets are
guaranteed valid for V
CC
down to 1V.
These devices are available in 26 factory-trimmed reset
threshold voltages (from 2.5V to 5V, in 100mV incre-
ments), featuring four minimum power-on reset timeout
periods (from 1ms to 1.12sec), and four watchdog time-
out periods (from 6.3ms to 25.6sec). Nine standard ver-
sions are available with an order increment requirement
of 2500 pieces (see
Standard Versions
table); contact
the factory for availability of other versions, which have
an order increment requirement of 10,000 pieces.
The MAX6316–MAX6322 are offered in a miniature
5-pin SOT23 package.
____________________________Features
o
Small 5-Pin SOT23 Package
o
Available in 26 Reset Threshold Voltages
2.5V to 5V, in 100mV Increments
o
Four Reset Timeout Periods
1ms, 20ms, 140ms, or 1.12sec (min)
o
Four Watchdog Timeout Periods
6.3ms, 102ms, 1.6sec, or 25.6sec (typ)
o
Four Reset Output Stages
Active-High, Push/Pull
Active-Low, Push/Pull
Active-Low, Open-Drain
Active-Low, Bidirectional
o
Guaranteed Reset Valid to V
CC
= 1V
o
Immune to Short Negative V
CC
Transients
o
Low Cost
o
No External Components
MAX6316–MAX6322
_______________Ordering Information
PART
MAX6316LUK____-T
MAX6316MUK____-T
MAX6317HUK____-T
MAX6318HUK____-T
MAX6318MHUK____-T
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
________________________Applications
Portable Computers
Computers
Controllers
Intelligent Instruments
Portable/Battery-Powered Equipment
Embedded Control Systems
Ordering Information continued at end of data sheet.
Typical Operating Circuit and Pin Configurations appear at
end of data sheet.
___________________________________________________________________Selector Guide
PART
MAX6316L
MAX6316M
MAX6317H
MAX6318LH
MAX6318MH**
MAX6319LH
MAX6319MH**
MAX6320P
MAX6321HP
MAX6322HP
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
WATCHDOG
INPUT
MANUAL
RESET
INPUT
RESET OUTPUTS*
ACTIVE-LOW
PUSH/PULL
ACTIVE-HIGH
PUSH/PULL
—
—
—
—
ACTIVE-LOW
BIDIRECTIONAL
—
ACTIVE-LOW
OPEN-DRAIN
—
—
—
—
—
—
—
*
The MAX6318/MAX6319/MAX6321/MAX6322 feature two types of reset output on each device.
**Future
product—contact factory for availability.
________________________________________________________________
Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
