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NCP803 Datasheet(PDF) 1 Page - ON Semiconductor

Part No. NCP803
Description  Very Low Supply Current 3-Pin Microprocessor Reset Monitor
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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NCP803 Datasheet(HTML) 1 Page - ON Semiconductor

   
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© Semiconductor Components Industries, LLC, 2003
May, 2003 - Rev. 4
1
Publication Order Number:
NCP803/D
NCP803
Very Low Supply Current
3−Pin Microprocessor
Reset Monitor
The NCP803 is a cost-effective system supervisor circuit designed
to monitor VCC 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
µsec of V
CC falling
through the reset voltage threshold. Reset is maintained active for a
minimum of 140 msec after VCC rises above the reset threshold. The
NCP803 has an open drain active-low RESET output. The output of
the NCP803 is guaranteed valid down to VCC = 1.0 V and is available
in a SOT-23 package.
The NCP803 is optimized to reject fast transient glitches on the VCC
line. Low supply current of 1.0
µA (V
CC = 3.2 V) make this device
suitable for battery powered applications.
Features
Precision V
CC Monitor for 2.5 V, 3.0 V, 3.3 V, and 5.0 V Supplies
Precision Monitoring Voltages from 1.6 V to 4.9 V Available
in 100 mV Steps
140 msec Guaranteed Minimum RESET Output Duration
RESET Output Guaranteed to V
CC = 1.0 V
Low 1.0 µA Supply Current
V
CC Transient Immunity
Small SOT-23 Package
No External Components
Wide Operating Temperature: -40°C to 105°C
Typical Applications
Computers
Embedded Systems
Battery Powered Equipment
Critical µP Power Supply Monitoring
VCC
VCC
VCC
RESET
RESET
NCP803
GND
GND
Figure 1. Typical Application Diagram
µP
0
0
Rpull- up
C = 100 nF
SOT-23
(TO-236)
CASE 318
Device
Package
Shipping
ORDERING INFORMATION
NCP803SNxxxT1
SOT-23
3000/Tape & Reel
PIN CONFIGURATION
3
1
2
VCC
GND
RESET
SOT-23*
NOTE: *SOT-23 is equivalent to JEDEC (TO-236)
(Top View)
See general marking information in the device marking
section on page 6 of this data sheet.
DEVICE MARKING INFORMATION
xxx = Specific Device Code
M
= Monthly Date Code
MARKING
DIAGRAM
3
2
1
xxxM
2
1
3
NOTE: The “xxx” denotes a suffix for Vcc voltage threshold
options - see page 6 for more details.
http://onsemi.com


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