MAX6332 and MAX6333
Vishay Semiconductor
3 Pin, Low-Power, µP Reset Circuits
Pin Configuration
SOT-23 (Top View)
Description
• The MAX6333 and 6332 are system supervisor
circuits designed to monitor V in digital systems
CC
1
GND
and provide a reset signal to the host processor
when necessary. No external components are
required.
V
3
cc
• When the processor power supply voltage drops
below the reset threshold, the reset output is driven
Reset/
Reset
2
active, in less than 40µs (T ). Reset is main-
D1
tained active for a time period (T ), after the V
D2
cc
rises above the threshold voltage.
• To prevent jitter, the reset threshold voltage has a
built-in hysteresis of 0.4% of V
Fig. 1 – Typical Application Diagram
.
TH
• The MAX6333 has an active-low reset output,
while the MAX6332 has an active-high reset
output. Both devices have push/pull output drives.
V
CC
V
V
CC
CC
• The reset signal is guaranteed valid, down to
MAX6332
MAX6333
V
cc
= 1.0V.
µP
• Low supply current of 3µA makes these devices
well suited for battery powered applications. They
are designed to reject fast transients from causing
false resets.
RESET
INPUT
RESET
(RESET)
GND
GND
• Both devices are available in a space-saving
SOT-23 package.
Features
Applications
• Tight reset voltage tolerances ± 1.8%
• Computers
• Low supply current: <3µA
• Critical µP/µC power monitoring
• Battery powered equipment
• Automotive electronics
• Precision monitoring of 1.8V and 2.5V
powersupply voltages
• Other threshold voltage options available from
1.5V to 2.5V in approximately 100mV increments
• Three reset active time-out period options:
typical 1.5mS, 30mS, 150mS
• Reset output guaranteed down to 1.0V
• V transient immunity
cc
• No external components
Document Number #####
27-Nov-01
www.vishay.com
1