NCP803 Datasheet, PDF (1/8 Pages) ON Semiconductor – Very Low Supply Current 3-Pin Microprocessor Reset Monitor

NCP803
Very Low Supply Current
3−Pin Microprocessor
Reset Monitor
The 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 µsec of V_CC falling
through the reset voltage threshold. Reset is maintained active for a
minimum of 140 msec after V_CC 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 V_CC = 1.0 V and is available
in a SOT-23 package.
The NCP803 is optimized to reject fast transient glitches on the V_CC
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
V_CC
C = 100 nF
V_CC
NCP803
RESET
R_{pull- up}
V_CC
µP
RESET
GND
GND
0
0
Figure 1. Typical Application Diagram
http://onsemi.com
MARKING
DIAGRAM
3
SOT-23
3
(TO-236)
xxxM
1
2
CASE 318
1
2
xxx = Specific Device Code
M = Monthly Date Code
PIN CONFIGURATION
GND 1
3 V_CC
RESET 2
SOT-23*
(Top View)
NOTE: *SOT-23 is equivalent to JEDEC (TO-236)
ORDERING INFORMATION
Device
Package
Shipping
NCP803SNxxxT1 SOT-23 3000/Tape & Reel
NOTE: The “xxx” denotes a suffix for V_cc voltage threshold
options - see page 6 for more details.
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 6 of this data sheet.
© Semiconductor Components Industries, LLC, 2003
1
May, 2003 - Rev. 4
Publication Order Number:
NCP803/D