19-1078; Rev 4; 9/10
+5V, Low-Power µP Supervisory Circuits
with Adjustable Reset/Watchdog
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 capacitors. A watchdog select pin extends the watchdog timeout 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.
Applications
Medical Equipment
Intelligent Instruments
Portable Equipment
Battery-Powered
Computers/Controllers
Embedded Controllers
Critical µP Monitoring
Set-Top Boxes
Computers
Selector Guide
FEATURE
MAX6301
MAX6302
MAX6303
MAX6304
Active-Low
Reset
√
—
√
—
Active-High
Reset
—
√
—
√
Open-Drain
Reset Output
√
√
—
—
—
√
o
o
o
o
o
o
o
o
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
VCC = 1V (MAX6301/MAX6303)
o Power-Supply Transient Immunity
o Watchdog Function can be Disabled
o PDIP/SO/µMAX Packages Available
Ordering Information
PART
MAX6301CPA
TEMP RANGE
0°C to +70°C
MAX6301CSA
0°C to +70°C
MAX6301CUA
0°C to +70°C
8 µMAX
MAX6301EPA
-40°C to +85°C
8 PDIP
√
PIN-PACKAGE
8 PDIP
8 SO
—
Push-Pull
Reset Output
____________________________Features
Pin-Package
MAX6301ESA
-40°C to +85°C
8 SO
Devices are available in both leaded and lead(Pb)-free/RoHScompliant 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.
8-PDIP/SO/ 8-PDIP/SO/ 8-PDIP/SO/ 8-PDIP/SO/
µMAX
µMAX
µMAX
µMAX
Pin Configuration
Typical Operating Circuit
VIN
MAX6301
ONLY
R1
1
TOP VIEW
8
RESET IN 1
GND 2
MAX6301
MAX6302
MAX6303
MAX6304
SRT 3
SWT 4
VCC
7
WDI
5
VCC 8
RL
0.1µF
R2
RESET (RESET)
6
RESET IN
WDS
2 GND
RESET 7
(RESET)
MAX6301
MAX6302
3
WDI 6
SRT MAX6303
4
5
SWT MAX6304 WDS
RESET
µP
RL MAX6302
ONLY
I/O
DIP/SO/µMAX
( ) ARE FOR MAX6302/MAX6304.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
CSRT
CSWT
( ) ARE FOR MAX6302/MAX6304.
WDS = 0 FOR NORMAL MODE
WDS = 1 FOR EXTENDED MODE
________________________________________________________________ Maxim Integrated Products
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.
1
MAX6301–MAX6304
_______________General Description
