19-0496; Rev 4; 11/99
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 1.12s), and four watchdog timeout
periods (from 6.3ms to 25.6s). Thirteen 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 1.12s (min)
o
Four Watchdog Timeout Periods
6.3ms, 102ms, 1.6s, or 25.6s (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.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
