MAX809 Datasheet, PDF (1/7 Pages) ON Semiconductor – 3-Pin Microprocessor Reset Monitors

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
GND
SOT–23
(TO–236)
CASE 318
PIN CONFIGURATION
(Top View)
GND 1
3 ^VCC
RESET
2
(RESET)**
SOT–23*
NOTE: *SOT–23 is equivalent to JEDEC (TO–236)
** RESET is for MAX809
** RESET is for MAX810
ORDERING INFORMATION
Device
Package
Shipping
MAX809xTR
SOT–23 3000 Tape/Reel
MAX810xTR
SOT–23 3000 Tape/Reel
NOTE: The ”x” denotes a suffix for VCC threshold –
see table below
Suffix
Reset VCC Threshold (V)
L
4.63
M
4.38
J*
4.00
T
3.08
S
2.93
R
2.63
NOTE: *J version is available for MAX809 only
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