MAX809, MAX810
3-Pin Microprocessor
Reset Monitors
The MAX809 and MAX810 are cost–effective system supervisor
circuits designed to monitor V
CC
in digital systems and provide a reset
signal to the host processor when necessary. No external components
are required.
The reset output is driven active within 20
µsec
of V
CC
falling
through the reset voltage threshold. Reset is maintained active for a
minimum of 140msec after V
CC
rises above the reset threshold. The
MAX810 has an active–high RESET output while the MAX809 has
an active–low RESET output. The output of the MAX809 is
guaranteed valid down to V
CC
= 1V. Both devices are available in a
SOT–23 package.
The MAX809/810 are optimized to reject fast transient glitches on
the V
CC
line. Low supply current of 17µA (V
CC
= 3.3V) makes these
devices suitable for battery powered applications.
Features
•
Precision V
CC
Monitor for 3.0V, 3.3V, and 5.0V Supplies
•
140msec Guaranteed Minimum RESET, RESET
Output Duration
•
RESET Output Guaranteed to V
CC
= 1.0V (MAX809)
•
Low 17µA Supply Current
•
V
CC
Transient Immunity
•
Small SOT–23 Package
•
No External Components
•
Wide Operating Temperature: –40°C to 85°C
Typical Applications
•
Computers
•
Embedded Systems
•
Battery Powered Equipment
•
Critical
µP
Power Supply Monitoring
TYPICAL APPLICATION DIAGRAM
VCC
VCC
MAX809
RESET
VCC
PROCESSOR
RESET
INPUT
GND
SOT–23
(TO–236)
CASE 318
PIN CONFIGURATION
(Top View)
GND
1
3
RESET
(RESET)**
VCC
2
SOT–23*
NOTE: *SOT–23 is equivalent to JEDEC (TO–236)
** RESET is for MAX809
** RESET is for MAX810
ORDERING INFORMATION
Device
MAX809xTR
MAX810xTR
Package
SOT–23
SOT–23
Shipping
3000 Tape/Reel
3000 Tape/Reel
NOTE: The ”x” denotes a suffix for VCC threshold –
see table below
Suffix
L
M
J*
T
S
R
Reset VCC Threshold (V)
4.63
4.38
4.00
3.08
2.93
2.63
GND
NOTE: *J version is available for MAX809 only
1
ESTEK [ Estek Electronics Co. Ltd ]
