MAX6332/MAX6333/
MAX6334
3-Pin, Ultra-Low-Voltage, Low-Power
μP Reset Circuits
General Description
Benefits and Features
● Ultra-Low 0.7V Operating Supply Voltage
The MAX6332/MAX6333/MAX6334 microprocessor (μP)
supervisory circuits monitor the power supplies in 1.8V to
3.3V μP and digital systems. They increase circuit reliability
and reduce cost by eliminating external components and
adjustments.
● Low 3.3μA Supply Current
● Precision Monitoring of 1.8V and 2.5V Power- Supply
Voltages
● Reset Thresholds Available from 1.6V to 2.5V,
in Approximately 100mV Increments
These devices perform a single function: they assert a
reset signal whenever the V
supply voltage declines
CC
● Fully Specified Over Temperature
below a preset threshold, keeping it asserted for a preset
timeout period after V has risen above the reset
CC
● Three Power-On Reset Pulse Widths Available
(1ms min, 20ms min, 100ms min)
threshold. The only difference among the three devices
is their output. The MAX6333 (push/pull) and MAX6334
(open-drain) have an active-low RESET output, while the
MAX6332 (push/pull) has an active-high RESET output.
The MAX6332/MAX6333 are guaranteed to be in the correct
● Low Cost
● Three Available Output Structures: Push/Pull
RESET, Push/Pull RESET, Open-Drain RESET
state for V
down to 0.7V. The MAX6334 is guaranteed
CC
● Guaranteed RESET/RESET Valid to V
= 0.7V
CC
to be in the correct state for V
down to 1.0V.
CC
(MAX6332/MAX6333)
The reset comparator in these ICs is designed to ignore
● Power-Supply Transient Immunity
● No External Components
● 3-Pin SOT23 Package
fast transients on V . Reset thresholds are factory-trimmable
CC
between 1.6V and 2.5V, in approximately 100mV increments.
There are 15 standard versions available (2,500 piece
minimum-order quantity); contact the factory for availability
of nonstandard versions (10,000 piece minimum-order
quantity). For space-critical applications, the MAX6332/
MAX6333/MAX6334 come packaged in a 3-pin SOT23.
● Pin-Compatible with MAX809/MAX810 and
MAX6326/MAX6327/MAX6328
Selector Guide (Standard Versions*) appears at end of data sheet.
Applications
®
● Pentium II Computers
Typical Operating Circuit
● Computers
● Controllers
V
CC
● Intelligent Instruments
● Critical μP/μC Power Monitoring
● Portable/Battery-Powered Equipment
V
CC
V
CC
µP
MAX6332
MAX6333
RESET
INPUT
RESET
(RESET)
GND
GND
( ) ARE FOR MAX6332
Pentium is a registered trademark of Intel Corp.
19-1411; Rev 4; 2/16