MAX6301 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – +5V, Low-Power uP Supervisory Circuits with Adjustable Reset/Watchdog

19-1078; Rev 0; 6/96
+5V, Low-Power µP Supervisory Circuits
with Adjustable Reset/Watchdog
_______________General Description
The MAX6301/MAX6302/MAX6303/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 Selector Guide). The MAX6301–MAX6304
are available in the space-saving 8-pin µMAX package,
as well as 8-pin DIP/SO.
________________________Applications
Medical Equipment
Embedded Controllers
Intelligent Instruments Critical µP Monitoring
Portable Equipment Set-Top Boxes
Battery-Powered
Computers
Computers/Controllers
_____________________Selector Guide
FEATURE
Active-Low
Reset
Active-High
Reset
Open-Drain
Reset Output
Push/Pull
Reset Output
Pins-Package
MAX6301 MAX6302 MAX6303 MAX6304

—

—
—

—



—
—
—
—


8-DIP/SO/ 8-DIP/SO/ 8-DIP/SO/ 8-DIP/SO/
µMAX µMAX µMAX µMAX
__________________Pin Configuration
____________________________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 DIP/SO/µMAX Packages Available
______________Ordering Information
PART
TEMP. RANGE PIN-PACKAGE
MAX6301CPA
0°C to +70°C
8 Plastic DIP
MAX6301CSA
0°C to +70°C
8 SO
MAX6301CUA
0°C to +70°C
8 µMAX
MAX6301EPA
-40°C to +85°C
8 Plastic DIP
MAX6301ESA
-40°C to +85°C
8 SO
Ordering Information continued at end of data sheet.
__________Typical Operating Circuit
V_IN
R1
1 _{RESET IN}
R2
MAX6301
ONLY
V_CC ⁸
R_L
0.1µF
TOP VIEW
2 _GND
RESET ₇
(RESET)
RESET
RESET IN 1
GND 2
SRT 3
SWT 4
MAX6301
MAX6302
MAX6303
MAX6304
8 ^VCC
7 ^{RESET (RESET)}
6 WDI
5 WDS
DIP/SO/µMAX
( ) ARE FOR MAX6302/MAX6304.
* Patents pending
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
WDI = 1 FOR EXTENDED MODE
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone]