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© Semiconductor Components Industries, LLC, 2009
February, 2009 − Rev. 6
1 Publication Order Number:
MAX803/D
MAX803 Series,
NCP803 Series
Very Low Supply Current
3-Pin Microprocessor
Reset Monitor
The MAX803/NCP803 is a cost−effective system supervisor circuit
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 10 msec of V
CC
falling
through the reset voltage threshold. Reset is maintained active for a
timeout period which is trimmed by the factory after V
CC
rises above
the reset threshold. The MAX803/NCP803 has an open drain
active−low RESET
output. Both devices are available in SOT−23 and
SC−70 packages.
The MAX803/NCP803 is optimized to reject fast transient glitches
on the V
CC
line. Low supply current of 0.5 mA (V
CC
= 3.2 V) make
these devices suitable for battery powered applications.
Features
• Precision V
CC
Monitor for 1.5 V, 2.5 V, 3.0 V, 3.3 V, and 5.0 V
Supplies
• Precision Monitoring Voltages from 1.2 V to 4.9 V Available
in 100 mV Steps
• Four Guaranteed Minimum Power−On Reset Pulse Width Available
(1 ms, 20 ms, 100 ms, and 140 ms)
• RESET Output Guaranteed to V
CC
= 1.0 V
• Low Supply Current
• V
CC
Transient Immunity
• No External Components
• Wide Operating Temperature: −40°C to 105°C
• Pb−Free Packages are Available
Typical Applications
• Computers
• Embedded Systems
• Battery Powered Equipment
• Critical Microprocessor Power Supply Monitoring
V
CC
V
CC
V
CC
RESET RESET
MAX803
NCP803
GND GND
Figure 1. Typical Application Diagram
mP
00
R
pull−up
C = 100 nF
SOT−23
(TO−236)
CASE 318
PIN CONFIGURATION
3
1
2
V
CC
GND
RESET
SOT−23/SC−70
(Top View)
MARKING
DIAGRAM
3
2
12
1
3
http://onsemi.com
xxx MG
G
xxx = Specific Device Code
M = Date Code
G = Pb−Free Package
xx MG
G
1
SC−70
(SOT−323)
CASE 419
See general marking information in the device marking
section on page 7 of this data sheet.
DEVICE MARKING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
ORDERING INFORMATION
(Note: Microdot may be in either location)
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