APX809 Datasheet, PDF (1/9 Pages) Diodes Incorporated – 3-PIN MICROPROCESSOR RESET CIRCUITS

APX809/810
3-PIN MICROPROCESSOR RESET CIRCUITS
Features
• 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)
• Push-Pull RESET Active High (APX810)
• 200ms Typ Power-On Reset Pulse Width
• 30µA Supply Current (Typ.)
• Guaranteed Reset Valid to V_CC = +1V
• No External Components
• SOT23 and SOT23R: Available in “Green” Molding
Compound (No Br, Sb)
• Lead Free Finish/RoHS Compliant (Note 1)
General Description
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.
These circuits perform a single function: they assert a reset
signal whenever the V_CC supply voltage declines below a preset
threshold, keeping it asserted for at least 240ms after V_CC 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
low RESET output, while the APX810 has an active high
RESET output. The reset comparator is designed to ignore fast
transients on V_CC, and the outputs are guaranteed to be in the
correct logic state for V_CC down to 1V. Low supply current makes
the APX809/810 ideal for use in portable equipment. The
APX809/810 is available in a 3-pin SOT23 and SOT23R
package.
Applications
• Computers
• Controllers
• Intelligent Instruments
• Critical µP and µC Power Monitoring
• Portable/Battery Powered Equipment
• Automotive
Ordering Information
APX8 XX - XX XX X X
Enable
09 : Active-Low
10 : Active-High
Voltage
46 : 4.63
44 : 4.38
40 : 4.00
31 : 3.08
29 : 2.93
26 : 2.63
23 : 2.25
Package
SA : SOT23
SR : SOT23R
Lead Free
G : Green
Packing
-7 : Taping
Device
APX809-XXSA
APX810-XXSA
APX809-XXSR
APX810-XXSR
Package
Code
SA
SA
SR
SR
Packaging
(Note 2)
SOT23
SOT23
SOT23R
SOT23R
7” Tape and Reel
Quantity
Part Number Suffix
3000/Tape & Reel
-7
3000/Tape & Reel
-7
3000/Tape & Reel
-7
3000/Tape & Reel
-7
Notes:
1. RoHS revision 13.2.2003. Glass and high temperature solder exemptions applied, see EU Directive Annex Notes 5 and 7.
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. 3
1 of 9
www.diodes.com
MARCH 2008
© Diodes Incorporated