19-1078; Rev 4; 9/10
+5V, Low-Power µP Supervisory Circuits
with Adjustable Reset/Watchdog
_______________General Description
The MAX6301–MAX6304* low-power microprocessor
(µP) supervisory circuits provide maximum adjustability
for reset and watchdog functions. The reset threshold
can be adjusted to any voltage above 1.22V, using
external resistors. In addition, the reset and watchdog
timeout periods are adjustable using external capaci-
tors. A watchdog select pin extends the watchdog time-
out period to 500x. The reset function features immunity
to power-supply transients.
These four devices differ only in the structure of their reset
outputs (see the
Selector Guide).
The MAX6301–MAX6304
are available in the space-saving 8-pin µMAX
®
package,
as well as 8-pin PDIP and SO packages.
____________________________Features
Adjustable Reset Threshold
Adjustable Reset Timeout
Adjustable Watchdog Timeout
500x Watchdog Timeout Multiplier
4µA Supply Current
RESET or
RESET
Output Options
Push-Pull or Open-Drain Output Options
Guaranteed
RESET
Asserted At or Above
V
CC
= 1V (MAX6301/MAX6303)
o
Power-Supply Transient Immunity
o
Watchdog Function can be Disabled
o
PDIP/SO/µMAX Packages Available
o
o
o
o
o
o
o
o
MAX6301–MAX6304
Applications
Medical Equipment
Intelligent Instruments
Portable Equipment
Battery-Powered
Computers/Controllers
FEATURE
Active-Low
Reset
Active-High
Reset
Open-Drain
Reset Output
Push-Pull
Reset Output
Pin-Package
MAX6301
√
—
√
—
Embedded Controllers
Critical µP Monitoring
Set-Top Boxes
Computers
Ordering Information
PART
MAX6301CPA
MAX6301CSA
MAX6301CUA
MAX6301EPA
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
PIN-PACKAGE
8 PDIP
8 SO
8 µMAX
8 PDIP
Selector Guide
MAX6302
—
√
√
—
MAX6303
√
—
—
√
MAX6304
—
√
—
√
MAX6301ESA
-40°C to +85°C
8 SO
Devices are available in both leaded and lead(Pb)-free/RoHS-
compliant packaging. Specify lead-free by adding the “+”
symbol at the end of the part number when ordering.
Ordering Information continued at end of data sheet.
Typical Operating Circuit
V
IN
MAX6301
ONLY
R1
1
RESET IN
V
CC
8
R
L
0.1µF
8-PDIP/SO/ 8-PDIP/SO/ 8-PDIP/SO/ 8-PDIP/SO/
µMAX
µMAX
µMAX
µMAX
Pin Configuration
TOP VIEW
RESET IN
1
GND
2
SRT
3
SWT
4
8
V
CC
RESET (RESET)
WDI
WDS
R2
2 GND
RESET 7
(RESET)
R
L
MAX6302
ONLY
I/O
RESET
µP
MAX6301
MAX6302
MAX6303
MAX6304
7
6
5
MAX6301
MAX6302
3
WDI 6
SRT
MAX6303
4
5
SWT
MAX6304
WDS
C
SRT
C
SWT
( ) ARE FOR MAX6302/MAX6304.
DIP/SO/µMAX
( ) ARE FOR MAX6302/MAX6304.
WDS = 0 FOR NORMAL MODE
WDS = 1 FOR EXTENDED MODE
µMAX is a registered trademark of Maxim Integrated Products, Inc.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
