MAX6301_10 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – +5V, Low-Power μP Supervisory Circuits with Adjustable Reset/Watchdog

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.
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
√
√
—
—
Push-Pull
—
—
Reset Output
√
√
Pin-Package
8-PDIP/SO/ 8-PDIP/SO/ 8-PDIP/SO/ 8-PDIP/SO/
µMAX
µMAX
µMAX
µMAX
TOP VIEW
RESET IN 1
GND 2
SRT 3
SWT 4
Pin Configuration
MAX6301
MAX6302
MAX6303
MAX6304
8 ^VCC
7 ^{RESET (RESET)}
6 WDI
5 WDS
DIP/SO/µMAX
( ) ARE FOR MAX6302/MAX6304.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
____________________________Features
o Adjustable Reset Threshold
o Adjustable Reset Timeout
o Adjustable Watchdog Timeout
o 500x Watchdog Timeout Multiplier
o 4µA Supply Current
o RESET or RESET Output Options
o Push-Pull or Open-Drain Output Options
o 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
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX6301CPA
0°C to +70°C
8 PDIP
MAX6301CSA
0°C to +70°C
8 SO
MAX6301CUA
0°C to +70°C
8 µMAX
MAX6301EPA
-40°C to +85°C
8 PDIP
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}
R2
2 _GND
V_CC ⁸
0.1µF
RESET ₇
(RESET)
R_L
RESET
MAX6301
3
SRT
MAX6302
MAX6303
WDI
6
4 _SWT MAX6304 _WDS 5
R_L MAX6302
ONLY
µP
I/O
C_SRT C_SWT
( ) ARE FOR MAX6302/MAX6304.
WDS = 0 FOR NORMAL MODE
WDS = 1 FOR EXTENDED MODE
________________________________________________________________ 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.