APR3021/2/3
MicroPower Microprocessor Reset Circuit
Features
•
•
•
•
•
•
1.2V to 5.5V Input Voltage Range
Low Quiescent Current : less Than 1.5
µA
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.
Reset Timeout Period 250ms
Available output configurations
- Open-drain output
- CMOS active high output
- CMOS active low output
General Description
The APR3021/2/3 are designed to monitor voltage
supplies in
µP
and digital systems. The quiescent
current is extremely low, typically 1.5 µA, making it
ideal for portable battery operated equipment. The
APR3021/2/3 operate by monitoring the system
power supply voltage. When the input voltage drops
below a fixed threshold, the device asserts a reset
signal for a fixed time period after Vcc rises above
the fixed threshold. The APR3021/2/3 series is avail-
able with three output stage versions : APR3021
push-pull active low output, APR3022 push-pull ac-
tive high output and APR3023 open drain active low
output. They are also designed to reject fast line tran-
sient glitches on Vcc. The APR3021/2/3 are come in
•
•
SOT-23 , SOT-23-5 and SOT-89 packages
No external components
Applications
•
•
•
•
Computers
Cell Phones
Portable Electronics
µP
Power Supply Monitoring
a miniature SOT-23, SOT-23-5, SOT-89 packages.
Pin Configuration
GND
3
1
(3 0 2 1 /3 ) R e s e t
(3 0 2 2 ) R e s e t
2
V
CC
NC
NC
5
1
2
4
3
(3021/3) Reset
GND V
CC
(3022) Reset
SOT-23 (Top View)
SOT-23-5 (Top View)
1
2
3
(3021/3) Reset
(3022) Reset
GND
V
CC
SOT-89 (Top View)
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.
Copyright
ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
1
www.anpec.com.tw
APR3021/2/3
Ordering and Marking Information
A P R 3 02 1/2 /3 -
Lea d F re e C ode
H andling C ode
T e m p . R a nge
P a ck a g e C o d e
V o ltage C o de
P a c ka g e C o d e
A : S O T -23
B : S O T -23-5
D : S O T -89
T e m p . R a nge
I : -4 0 to 85
°
C
H andling C ode
T R : T ape & R eel
V o ltage C o de :
15 : 1.5V ~ 43 : 4 .38 V
Lea d F re e C ode
L : L e a d F re e D evic e
B lan k : O rigin a l D e vice
A P R 3 021/2/3 A /B : 21 /2/3 X X
D ate C ode
V o ltage C o de A :1.5V B :1.75V C :2.32V D :2.63V E :2.93V F :3.0 8V G :3.9V H :4.3 8V
A P R 3 021/2/3 -15 D :
A P R 3 021/2/3
XX XX X
15
XX XX X
- D ate C ode
;
15 - 1.5V
Absolute Maximum Ratings
Symbol
V
CC
V
RESET
I
MAX
I
RESET
dVcc/dt
T
J
T
L
R
TH,JA
P
D
V
CC
to GND
RESET to GND (Push-Pull Output)
RESET to GND (Open Drain Output)
Maximum Continuous Input Current
RESET/RESET Current
Rate of Rise of V
CC
Junction Temperature Range
Lead Temperature (Soldering, 10 second)
Thermal Resistance – Junction to Ambient
Power Dissipation
SOT-23
SOT-23-5
SOT-89
Parameter
Value
-0.3 to 6
-0.3 to V
CC
+0.3
-0.3 to 6
20
20
100
-40 to 150
260
357
357
180
Internally Limited
Unit
V
V
mA
mA
V/µs
°C
°C
°C/W
W
Pin Descrpition
No.
PIN
Name
RESET
(APR3021/3)
RESET
(APR3022)
V
CC
GND
Description
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
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.
Supply Voltage (+1.2V to +6V)
Ground connection
1
2
3
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.2 - Oct., 2003
2
www.anpec.com.tw
APR3021/2/3
Part Number Description
Part Number
APR3021
APR3022
APR3023
Part Description
Reset Output Push Pull Active Low with Delay
Reset Output Push Pull Active High with Delay
Reset Output Open Drain Active Low with Delay
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.
Symbol
V
CC
I
CC
V
TH
V
HYST
T
RTP
V
OL
V
OH
T
D
I
LE
Parameter
Supply Voltage
Supply Current
Reset Threshold
Hysteresis Range
Reset Timeout Period
Reset Output Low
Reset Output High
V
CC
to Reset Delay
Reset Output Leakage
Test Conditions
V
CC
=1.5V~6V
T
A
=-40 to 85°C
T
A
=25°C
T
A
=-40 to 85°C
APR3021/2/3
Min.
Typ.
Max.
1.2
6
1.5
4
3
5
±1.5%
±2%
20
150
250
350
0.5
0.8*V
CC
25
0.5
Unit
V
µA
I
SINK
=1.2mA
I
SOURCE
=0.6mA
V
CC
=V
TH
to (V
TH
-100mV)
mV
ms
V
µS
µA
Application Circuit
V
CC
V
CC
V
CC
100k
V
CC
V
CC
V
CC
APR3023 RESET
RESET
µ
P
INPUT
APR3021 RESET
APR3022 (RESET)
RESET
µ
P
INPUT
GND
GND
GND
GND
Copyright
ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
4
www.anpec.com.tw
Embedded System
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