AIC811/AIC812
Reset Circuits with Manual Reset Input
FEATURES
Ultra Low Supply Current 1µA(typ.)
Guaranteed Reset Valid to Vcc=0.9V
Available in two Output Types: Push-Pull Active
Low (AIC811), Push-Pull Active High (AIC812)
140ms Min. Power-On Reset Pulse Width
Internally Fixed Threshold 2.3V, 2.6V, 2.9V,
3.1V, 4.0V, 4.4V, and 4.6V
Tight Voltage Threshold Tolerance: 1.5%
Low profile Package: SOT-23-5
These devices perform as valid singles in applications
with Vcc ranging from 6.0V down to 0.9V. The reset
DESCRIPTION
AIC811/AIC812 are low-power microprocessor (µP)
supervisory circuits used to monitor power supplies in
µP and digital systems. They provide applications with
benefits of circuit reliability and low cost by eliminating
external components. AIC811/AIC812 also offer a
manual reset input.
APPLICATIONS
Notebook Computers
Digital Still Cameras
PDAs
Critical Microprocessor Monitoring
signal lasts for a minimum period of 140ms whenever
V
CC
supply voltage falls below preset threshold. Both
AIC811 and AIC812 were designed with a reset
comparator to help identify invalid signals, which last
less than 140ms. The only difference between them is
that they have an active-low
RESET
output and
active-high RESET output, respectively.
Low supply current (1
µA)
makes AIC811/AIC812 ideal
for portable equipment. The devices are
available
in
SOT-23-5 package.
TYPICAL APPLICATION CIRCUIT
V
CC
VCC
AIC811
(AIC812)
RESET
MR (RESET)
GND
VCC
µP
RESET
INPUT
GND
Pushbutton
Switch
Analog Integrations Corporation
Si-Soft Research Center
3A1, No.1, Li-Hsin Rd. I, Science Park, Hsinchu 300, Taiwan, R.O.C.
TEL: 886-3-5772500
FAX: 886-3-5772510
www.analog.com.tw
DS-811P-03 010405
1
AIC811/AIC812
ELECTRICAL CHARACTERISTICS
(Typical values are at T
A
=25°C, unless otherwise specified) (Note 1)
PARAMETER
Operating Voltage Range
Supply Current
SYMBOL
TEST CONDITIONS
V
CC
= V
TH
+0.1V
AIC811-23
AIC811-26
AIC811-29
T
A
=+25°C
T
A
= -40°C to +85°C
T
A
=+25°C
T
A
= -40°C to +85°C
T
A
=+25°C
T
A
= -40°C to +85°C
T
A
=+25°C
T
A
= -40°C to +85°C
T
A
=+25°C
T
A
= -40°C to +85°C
T
A
=+25°C
T
A
= -40°C to +85°C
T
A
=+25°C
T
A
=-40°C to +85°C
MIN.
0.9
TYP.
1
MAX.
6
3
2.335
2.346
2.639
2.652
2.944
2.958
3.147
3.162
4.060
4.080
4.466
4.488
4.669
4.692
UNIT
V
µA
V
CC
I
CC
2.265
2.254
2.561
2.548
2.857
2.842
3.054
3.038
3.940
3.920
4.334
4.312
4.531
4.508
2.3
2.6
2.9
3.1
4.0
4.4
4.6
Reset Threshold
V
TH
AIC811-31
AIC811-40
AIC811-44
AIC811-46
V
V
CC
to Reset Delay
Reset Active Timeout Period
T
RD
T
RP
T
MD
V
IH
V
IL
V
CC
=V
TH
to (V
TH
–0.1V),
V
TH
=3.1V
V
CC
T
A
=+25°C
= V
TH(MAX)
T
A
= -40°C to +85°C
Vcc=6V
0.7V
CC
140
100
20
230
560
1030
0.5
µS
mS
µS
V
KΩ
V
V
MR
to Reset Propagation
Delay
MR
Input Threshold
MR
Pull-Up Resistance
RESET
Output Voltage
0.25V
CC
10
20
30
0.2Vcc
0.8V
CC
0.2Vcc
V
CC
=V
TH
+0.1V, I
SOURCE
=1mA
V
CC
=V
TH
- 0.1V, I
SINK
=1mA
V
CC
=V
TH
+0.1V, I
SOURCE
=1mA
V
CC
=V
TH
- 0.1V, I
SINK
=1mA
0.8V
CC
V
OH
V
OL
V
OH
V
OL
RESET Output Voltage
Note1: Specifications are production tested at T
A
=25°C. Specifications over the -40°C to 85°C operating
temperature range are assured by design, characterization and correlation with Statistical Quality
Controls (SQC).
Note2:
RESET
output is for AIC811; RESET output is for AIC812.
4
AIC811/AIC812
TYPICAL PERFORMANCE CHARACTERISTICS
1.5
120
Power-Down Reset Delay (µS)
1.4
1.3
110
100
90
80
70
60
50
40
30
20
10
0
-60
-40
-20
0
20
40
V
TH
=2.3V
V
TH
=2.3V
V
OD
=V
TH
-V
CC
Supply Current (µA)
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
-40
-
20
0
20
V
TH
=3.1V
V
TH
=4.6V
V
OD
=50mV
V
OD
=100mV
V
OD
=200mV
40
60
80
100
60
80
100
Temperature (°C)
Fig 1 Supply Current vs. Temperature
Temperature (°C)
Fig 2 Power-Down Reset Delay vs. Temperature
240
Power-Down Reset Delay (µS)
Power-Down Reset Delay (µS)
220
200
180
160
140
120
100
80
60
40
20
0
-
60
-
40
-20
V
TH
=3.1V
V
OD
=V
TH
-V
CC
400
V
OD
=50mV
V
TH
=4.6V
V
OD
=V
TH
-V
CC
300
V
OD
=50mV
200
V
OD
=100mV
V
OD
=100mV
V
OD
=200mV
0
20
40
60
80
100
100
V
OD
=200mV
0
-60
-
40
-
20
0
20
40
60
80
100
Temperature (°C)
Fig 3 Power-Down Reset Delay vs. Temperature
Temperature (°C)
Fig 4 Power-Down Reset Delay vs. Temperature
600
Normalized Reset Threshold (V)
1.010
1.005
1.000
0.995
0.990
0.985
-40
-20
0
V
TH
=4.6V
Power-Up Reset Timeout (mS)
1.015
500
400
V
TH
=3.1V
300
200
V
TH
=3.1V
V
TH
=4.6V
V
TH
=2.3V
V
TH
=2.3V
100
0
-60
-40
-20
0
20
40
60
80
100
20
40
60
80
100
Temperature (°C)
Fig 5 Normalized Reset Threshold vs. Temperature
Temperature (°C)
Fig 6 Power-Up Reset Timeout vs. Temperature
5
Analog electronics
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