MicroPower Microprocessor Reset Circuit with Manual Reset
Copyright
ANPEC Electronics Corp.
Rev. A.3 - Feb., 2004
APR3101/2/3
www.anpec.com.tw
1
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
Features
General Description
Applications
1.2V to 6V Input Voltage Range
Low Quiescent Current : less Than 1.5
A
High accuracy detection threshold : 1.5%
Fixed trimmed reset thresholds for 1.5V, 1.75V,
2.32V, 2.63V, 2.93V, 3.08V, 3.9V, 4.38V.
Manual Reset Input
Reset Timeout Period 250ms
Available output configurations
- Open-drain output
- CMOS active high output
- CMOS active low output
SOT-23-5 package
No external components
Pin Configuration
The APR3101/2/3 are designed to monitor voltage
supplies in
P and digital systems. The quiescent
current is extremely low, typically 1.5
A, making it
ideal for portable battery operated equipment. The
APR3101/2/3 operate by monitoring the system power
supply voltage. When the input voltage drops below a
fixed threshold or whenever manual reset is asserted,
the device asserts a reset signal for a fixed time pe-
riod after Vcc rises above the fixed threshold or manual
reset is deasserted. The APR3101/2/3 series is avail-
able with three output stage versions:APR3101 push-
pull active low output, APR3102 push-pull active high
output and APR3103 open drain active low output. The
APR3101/2/3 also have a debounced manual reset
input that is provided to override the reset monitor.
They are also designed to reject fast line transient
glitches on Vcc. The APR3101/2/3 are come in a
miniature SOT-23-5 package.
NC
GND
MR
V
CC
1
2
3
4
5
(3101/3)
(3102)
Reset
Reset
SOT-23-5 (Top
View)
Computers
Cell Phones
Portable Electronics
P Power Supply Monitoring
Copyright
ANPEC Electronics Corp.
Rev. A.3 - Feb., 2004
APR3101/2/3
www.anpec.com.tw
2
Ordering and Marking Information
Package Code
B : SOT-23-5
Temp. Range
I : -40 to 85 C
Handling Code
TR : Tape & Reel
Voltage Code :
15 : 1.5V ~ 50 : 5.0V
Lead Free Code
L : Lead Free Device Blank : Original Device
APR3101/2/3 -
Handling Code
Temp. Range
Package Code
Voltage Code
Date Code
X X
Voltage Code
A1/2/3
APR3101/2/3 B :
A:1.5V B:1.75V C:2.32V D:2.63V E:2.93V F:3.08V G:3.9V H:4.38V
Lead Free Code
Absolute Maximum Ratings
Symbol Parameter
Value
Unit
V
CC
V
CC
to GND
-0.3 to 6
V
RESET to GND (Push-Pull Output)
-0.3 to V
CC
+0.3
V
RESET
RESET to GND (Open Drain Output)
-0.3 to 6
V
I
CC
, I
MR
Maximum Continuous Input Current
20
mA
I
RESET
RESET/RESET
Current
20
mA
dVcc/dt
Rate of Rise of V
CC
100
V/
s
T
J
Junction Temperature Range
-40 to 150
C
T
L
Lead Temperature (Soldering, 10 second)
260
C
R
TH,JA
Thermal Resistance Junction to Ambient
357
C/W
P
D
Power Dissipation
Internally Limited
W
TSTG
Storage Temperature Range
-65 to +150
C
Pin Function Descrpition
PIN
No. Name
Description
1 GND
Ground
connection
2
NC
No internal connection
RESET
(APR3101/3)
RESET output remains low while V
CC
is below the reset threshold and remains
so for a fixed time period after V
CC
raises above the reset threshold.
3
RESET
(APR3102)
RESET output remains high while V
CC
is below the reset threshold and remains
so for a fixed time period after V
CC
raises above the reset threshold.
4 MR
Manual Reset active low input. A logic low signal on MR asserts a reset
condition. Asserted reset continues as long as MR is low and for a fixed time
period after MR returns high.
5 V
CC
Supply Voltage (+1.2V to +6V)
Note: The pin sequence here might not be correct for all different package types, and please refer pin
configuration in page1 for correct pin assignment.
Copyright
ANPEC Electronics Corp.
Rev. A.3 - Feb., 2004
APR3101/2/3
www.anpec.com.tw
4
Part Number
Part Description
APR3101
Reset Output Push Pull Active Low with Delay
APR3102
Reset Output Push Pull Active High with Delay
APR3103
Reset Output Open Drain Active Low with Delay
APR3101/2/3
Symbol
Parameter
Test Conditions
Min. Typ. Max.
Unit
V
CC
Supply Voltage
1.2 6 V
I
CC
Supply Current
V
CC
=1.5V~6V
1.5
4
A
T
A
=-40 to 85C
3
5
T
A
=25C
1.5%
V
TH
Reset Threshold
T
A
=-40 to 85C
2%
V
HYST
Hysteresis Range
20
mV
T
RTP
Reset Timeout Period
150
250
350
ms
V
OL
Reset Output Low
I
SINK
=1.2mA
0.5
V
V
OH
Reset Output High
I
SOURCE
=0.6mA
0.8*V
CC
T
D
V
CC
to Reset Delay
V
CC
=V
TH
to (V
TH
-100mV) 25
S
I
LE
Reset Output Leakage
0.5
A
T
MPW
MR Minimum Pulse Width
10
S
T
MRD
MR to Reset Delay
0.5
S
V
MIL
MR Input Low Threshold
0.4* V
CC
V
V
MIH
MR Input High Threshold
0.5* V
CC
R
MR
MR Pull-Up resistance
30 47 70
K
Application Circuit
V
CC
V
CC
GND
100k
APR3103 RESET
RESET
INPUT
P
V
CC
GND
Part Number Description
Electrical Characteristics
V
IN
= 5V, T
A
= -40 to 85
C unless otherwise noted. Typical values are at T
A
=25
C, V
CC
= 5V for 4.38V
versions, V
CC
= 3.3V for 3.08/2.93V versions, V
CC
= 3.0V for 2.63V. versions and V
CC
= 2.5V for 2.32V
versions, V
CC
= 2.0V for 1.75V versions , V
CC
= 1.8V for 1.5V versions.
V
CC
V
CC
GND
RESET
(RESET)
RESET
INPUT
P
V
CC
GND
APR3101
APR3102
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