APX811/812
4-Pin Microprocessor Supervisor With Manual Reset
Features
• Precision Monitor of(2.5V/3.0V/3.3V/5.0V) power
supply voltage
• Full specified over temperature
• Manual reset input
• Available in four output configuration
• Push-pull
• Push-pull RESET Acti ve high(APX812)
• Power-on reset generator with fixed delay time 200ms
• SOT143: Available in “Green” Molding Compound
(No Br, Sb)
• Lead Free Finish/RoHS Compliant (Note 1)
Active low(APX811)
RESET
Applications
• Computers
• Controllers
• Intelligent Instruments
• Critical uP and UC power Monitoring
• Portable/Battery powered Equipment
• Automotive
Typical Application Circuit
General Description
The APX811/812 are used for microprocessor supervisory circuit
to monitor the power supplies in These circuit 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 APX811/812 have push-pull outputs.
The APX811 has an active low
APX812 has an active high RESET output.
The APX811/812 devices incorporate a manual reset input,
A low level at
The APX811/2 are t argeted at 2.5V, 3V, 3.3V a nd 5V powered
systems and are available with different threshold voltages to
meet the exact needs of the system. They ar e available in the
space saving SOT143 package and operate over the whole
industrial temperature range, -40 to 85°C.
causes RESET to become active.
MR
output, while the
RESET
MR
.
Vcc
(Manual Reset)
Push Botton
Vcc
APX811/APX812
MR
GND
RESET
(RESET)
Vcc
MCU
RESET Input
GND
APX811/812 Rev. 2 1 of 10 OCTOBER 2009
DS31960 www.diodes.com © Diodes Incorporated
Ordering Information
APX811/812
4-Pin Microprocessor Supervisor With Manual Reset
APX 8 XX - XX U G - 7
Enable
11 : Active-Low
12 : 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
U : SOT143
Green
G : Green
Packing
7 : Tape & Reel
Device
APX811-XXUG-7 U SOT143 3000/Tape & Reel -7
APX812-XXUG-7 U SOT143 3000/Tape & Reel -7
Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Pl ease visit our website at
http://www.diodes.com/datasheets/ap02001.pdf
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
Package
Code
Packaging
(Note 2)
.
.
Quantity Part Number Suffix
7” Tape and Reel
Pin Assignments
( Top View )
4
GND
1
Vcc
MR
3
RESET
(RESET)
2
SOT143
Pin Descriptions
Pin Name Description
GND Ground
RESET
(RESET)
VCC Operating Voltage Input
MR
APX811/812 Rev. 2 2 of 10 OCTOBER 2009
DS31960 www.diodes.com © Diodes Incorporated
Reset output Pin
L: for APX811
H: for APX812
Manual reset (Active Low)
Block Diagram
APX811/812
4-Pin Microprocessor Supervisor With Manual Reset
Vcc
Delay Circuit
Driver
RESET
Vref
MR
Absolute Maximum Ratings
Symbol Parameter Rating Unit
ESD HBM Human Body Model ESD protection 3 kV
ESD MM Machine Model ESD Protection 500 V
VCC Supply voltage -0.3~7 V
V
RESET -0.3 to (Vcc+0.3) V
RESET
ICC Input Current, Vcc 20 mA
IO Output current 20 mA
PD Power dissipation 320 mW
Recommended Operating Conditions
Symbol Parameter Min Max Unit
VCC Supply Voltage 1.1 5.5 V
VIN Input Voltage 0 (VCC+0.3) V
TA Operating Ambient Temperature -40 85
APX811/812 Rev. 2 3 of 10 OCTOBER 2009
DS31960 www.diodes.com © Diodes Incorporated
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