APX809S/810S
3-PIN MICRO POWER VOLTAGE DETECTOR
Description
The APX809S/810S 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 and
+2.5V 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 APX809S/810S have push pull
outputs. The APX809S has an active low
RESET
output, while the
APX810S 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 APX809S/810S ideal for use in portable
equipment. The APX809S/810S is available in a 3-pin SOT23
package.
Pin Assignments
(Top View)
(Top View)
2
RESET/
RESET
2
GND
V
CC
3
1
V
CC
3
GND
1
RESET/
RESET
SOT23 (SA)
SOT23 (SR)
Applications
Computers
Controllers
Intelligent Instruments
Critical µP and µC Power Monitoring
Portable/Battery Powered Equipment
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 (APX809S)
Push-Pull RESET Active High (APX810S)
200ms Typ Power-On Reset Pulse Width
7µA Supply Current (Typ.)
Guaranteed Reset Valid to V
CC
= +1V
No External Components
SOT23 Available in “Green” Molding Compound (No Br, Sb)
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and
Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Typical Applications Circuit
V
CC
C
IN
100nF
V
CC
V
CC
APX809S/810S
RESET/
RESET
Microprocessor
RESET
INPUT
GND
GND
APX809S/810S
Document number: DS39140 Rev. 2 - 2
1 of 10
www.diodes.com
February 2019
© Diodes Incorporated
APX809S/810S
Absolute Maximum Ratings
(@T
A
= +25° unless otherwise specified.) (Note 4)
C,
Symbol
V
CC
V
RESET
I
CC
I
O
θ
JA
θ
JC
ESD
MM (Machine Model)
T
J
T
STG
Note:
Parameter
Supply Voltage
Rating
-0.3 to 6.0
-0.3 to 6.0
20
20
SOT23
SOT23
232
Unit
V
V
mA
mA
°
C/W
RESET
/RESET Voltage
Input Current
Output Current
Thermal Resistance Junction-to-Ambient
Thermal Resistance Junction-to-Case
HBM (Human Body Model)
87
6,000
V
600
-40 to +150
-65 to +150
°
C
C
Junction Temperature Range
Storage Temperature Range
4. Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied.
Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability.
Recommended Operating Conditions
(@T
A
= +25° unless otherwise specified.)
C,
Symbol
T
A
V
CC
V
RESET
Parameter
Operating Ambient Temperature Range
Supply Voltage
RESET
/RESET
Output Voltage
Min
-40
1.0
0
Max
+125
5.5
5.5
Unit
°
C
V
V
APX809S/810S
Document number: DS39140 Rev. 2 - 2
3 of 10
www.diodes.com
February 2019
© Diodes Incorporated
APX809S/810S
Performance Characteristics
RESET Threshold Voltage vs. Temperature
RESET Active Timeout Period vs. Temperature
3.10
3.05
3.00
2.95
2.90
2.85
2.80
2.75
2.70
-40
500
Reset Active Timeout Period (ms)
APX809S-29SA-7
APX809S-29SA-7
400
Threshold Voltage (V)
300
200
100
-25
-10
5
20
35
50
65
o
80
95
110
125
0
-40
-25
-10
5
20
35
50
65
o
80
95
110
125
Ambient Temperature ( C)
Ambient Temperature ( C)
Supply Current vs. Temperature
16
Output Voltage vs. Input Voltage
8
APX809S-29SA-7
12
7
6
APX809S-29SA-7
Supply Current (
A)
Output Voltage (V)
5
4
3
2
1
8
4
0
-40
-25
-10
5
20
35
50
65
o
80
95
110
125
0
0
1
2
3
4
5
6
Ambient Temperature ( C)
Supply Voltage (V)
Output Sink Current vs. Input Voltage
12
Output Sink Current vs. Input Voltage
6.4
10
APX809S-29SA-7
V
RESET
=0.2V
6.0
-40 C
o
25 C
o
5.6
APX809S-29SA-7
V
RESET
=V
IN
-0.2V
-40 C
o
Drive Current (mA)
Sink Current (mA)
8
5.2
4.8
4.4
4.0
3.6
3.2
2.8
25 C
o
6
125 C
o
125 C
o
4
2
0
1.0
1.4
1.8
2.2
2.6
3.0
2.4
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Input Voltage (V)
Input Voltage (V)
APX809S/810S
Document number: DS39140 Rev. 2 - 2
5 of 10
www.diodes.com
February 2019
© Diodes Incorporated
Analogue and Mixed Signal
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