APX809/810
3-PIN MICROPROCESSOR RESET CIRCUITS
General Description
Features
The APX809/810 are used for microprocessor (µP) supervisory
circuits to monitor the power supplies in µP and digital systems.
They provide excellent circuit reliability and low cost by
eliminating external components and adjustments when used
with +5V, +3.3V, +3.0V powered circuits.
•
Precision Monitoring of +2.5V, +3V, +3.3V, and +5V
Power-Supply Voltages
Fully Specified Over Temperature
Available in three Output Configurations
•
•
•
Push-Pull RESET Active Low (APX809)
These circuits perform a single function: they assert a reset
signal whenever the VCC supply voltage declines below a preset
threshold, keeping it asserted for at least 240ms after VCC has
risen above the reset threshold. Reset thresholds suitable for
operation with a variety of supply voltages are available. The
APX809/810 have push pull outputs. The APX809 have an active
•
•
•
•
•
•
Push-Pull RESET Active High (APX810)
200ms Typ Power-On Reset Pulse Width
30µA Supply Current (Typ.)
Guaranteed Reset Valid to V = +1V
CC
No External Components
SOT23 and SOT23R: Available in “Green” Molding
Compound (No Br, Sb)
Lead Free Finish/RoHS Compliant (Note 1)
low RESET output, while the APX810 has an active high
RESET output. The reset comparator is designed to ignore fast
transients on VCC, and the outputs are guaranteed to be in the
correct logic state for VCC down to 1V. Low supply current makes
the APX809/810 ideal for use in portable equipment. The
•
APX809/810 is available in
packages.
a 3-pin SOT23 and SOT23R
Applications
•
•
•
•
•
•
Computers
Controllers
Intelligent Instruments
Critical µP and µC Power Monitoring
Portable/Battery Powered Equipment
Automotive
Ordering Information
APX 8 XX - XX XX G - 7
Green
Enable
Voltage
Packing
Package
09 : Active-Low
10 : Active-High
46 : 4.63
44 : 4.38
40 : 4.00
31 : 3.08
29 : 2.93
26 : 2.63
23 : 2.25
G : Green
7 : Tape & Reel
SA : SOT23
SR : SOT23R
7” Tape and Reel
Package
Code
Packaging
(Note 2)
Device
Quantity
Part Number Suffix
APX809-XXSAG-7
APX810-XXSAG-7
APX809-XXSRG-7
APX810-XXSRG-7
SA
SA
SR
SR
SOT23
SOT23
SOT23R
SOT23R
3000/Tape & Reel
3000/Tape & Reel
3000/Tape & Reel
3000/Tape & Reel
-7
-7
-7
-7
Notes:
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
APX809/810 Rev. 4
1 of 9
FEBRUARY 2009
www.diodes.com
© Diodes Incorporated