19-2336; Rev 0; 1/02
Low-Power, Single/Dual-Voltage µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
General Description
Features
The MAX6412–MAX6420 low-power microprocessor
supervisor circuits monitor system voltages from 1.6V to
5V. These devices are designed to assert a reset signal
o Monitor System Voltages from 1.6V to 5V
o Capacitor-Adjustable Reset Timeout Period
whenever the V supply voltage or RESET IN falls below
CC
o Manual Reset Input (MAX6412/MAX6413/MAX6414)
its reset threshold or the manual reset input is asserted.
The reset output remains asserted for the reset timeout
o Adjustable Reset Input Option
(MAX6415–MAX6420)
period after V
and RESET IN rise above the reset
CC
threshold and the manual reset input is deasserted. The
reset timeout is externally set by a capacitor to provide
more flexibility.
o Dual-Voltage Monitoring
(MAX6418/MAX6419/MAX6420)
o Low Quiescent Current (1.7µA typ)
The MAX6412/MAX6413/MAX6414 feature fixed thresholds
from 1.575V to 5V in approximately 100mV increments and
a manual reset input. The MAX6415/MAX6416/MAX6417
are offered with an adjustable reset input that can monitor
voltages down to 1.26V and the MAX6418/MAX6419/
MAX6420 are offered with one fixed input and one
adjustable input to monitor dual-voltage systems.
o 3 RESET Output Options
Push-Pull RESET
Push-Pull RESET
Open-Drain RESET
o Guaranteed Reset Valid to V
= 1V
CC
The MAX6412/MAX6415/MAX6418 have an active-low,
push-pull reset output. The MAX6413/MAX6416/
MAX6419 have an active-high, push-pull reset output
and the MAX6414/MAX6417/MAX6420 have an active-
low, open-drain reset output. All of these devices are
offered in a SOT23-5 package and are fully specified
from -40°C to +125°C.
o Power-Supply Transient Immunity
o Small SOT23-5 Packages
Ordering Information
PART
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
PIN-PACKAGE
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
MAX6412UK_ _-T
MAX6413UK_ _-T
MAX6414UK_ _-T
MAX6415UK-T
MAX6416UK-T
MAX6417UK-T
MAX6418UK_ _-T
MAX6419UK_ _-T
MAX6420UK_ _-T
Applications
Automotive
Medical Equipment
Intelligent Instruments
Portable Equipment
Battery-Powered Computers/Controllers
Embedded Controllers
Critical µP Monitoring
Set-Top Boxes
Note: The MAX6412/MAX6413/MAX6414 and MAX6418/
MAX6419/MAX6420 are available with factory-set V reset
CC
Computers
thresholds from 1.575V to 5.0V in approximately 0.1V incre-
ments. Insert the desired nominal reset threshold suffix (from
Table 1) into the blanks following the letters UK. There are 33
standard versions with a required order increment of 2500
pieces. Sample stock is generally held on standard versions
only (see Standard Versions Table). Required order increment is
10,000 pieces for nonstandard versions. Contact factory for
availability. All devices are available in tape-and-reel only.
Pin Configuration
TOP VIEW
RESET/RESET
GND
1
2
3
5
V
CC
MAX6412–
MAX6420
Typical Operating Circuit appears at end of data sheet.
Selector Guide appears at end of data sheet.
RESET IN (MR)
4
SRT
SOT23-5
( ) FOR THE MAX6412/MAX6413/MAX6414
________________________________________________________________ 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.