AIC809/AIC810
3-Pin Microprocessor Reset Circuits
FEATURES
Ultra Low Supply Current 1µA(typ.)
Guaranteed Reset Valid to Vcc=0.9V
Available in Three Output Type: Open-Drain
Active Low (AIC809N), Push-Pull Active Low
(AIC809), Push-Pull Active High (AIC810)
140ms Min. Power-On Reset Pulse Width
Internally Fixed Threshold 2.3V, 2.6V, 2.9V,
3.1V, 4.0V, 4.4V, 4.6V
Tight Voltage Threshold Tolerance: 1.5%
Tiny Package in SOT-23
These devices perform as valid singles in applications
with Vcc ranging from 6.0V down to 0.9V. The reset
signal lasts for a minimum period of 140ms whenever
V
CC
supply voltage falls below preset threshold. Both
DESCRIPTION
AIC809/AIC810 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.
APPLICATIONS
Notebook Computers
Digital Still Cameras
PDAs
Critical Microprocessor Monitoring
AIC809 and AIC810 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 AIC809/AIC810 ideal
for portable equipment. The devices are
available
in
SOT-23 package.
TYPICAL APPLICATION CIRCUIT
V
CC
VCC
AIC809
(AIC810)
RESET
(RESET)
GND
VCC
µP
RESET
INPUT
GND
Push-Pull Output
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-809P-02 010405
1
AIC809/AIC810
ORDERING INFORMATION
AIC809X-XXXXXX
AIC810 -XXXXXX
PACKING TYPE
TR: TAPE & REEL
BG: BAG
PACKAGE TYPE
U: SOT-23
C: COMMERCIAL
P: LEAD FREE COMMERCIAL
RESET THRESHOLD VOLTAGE
23: 2.3V
26: 2.6V
29: 2.9V
31: 3.1V
40: 4.0V
44: 4.4V
46: 4.6V
OUTPUT TYPE
DEFAULT: Push-Pull type
N: N-ch Open-Drain type
(Additional voltage versions with a unit of 0.1V within the voltage range from 1.5V to 5.5V for this
product line may be available on demand with prior consultation with AIC.)
Example: AIC809-31-CUTR
3.1V and push-pull version, in SOT-23 Package & Tape & Reel Packing Type
AIC809-31-PUTR
3.1V and push-pull version, in Lead Free SOT-23 Package & Tape & Reel Packing
Type
PIN CONFIGURATION
SOT-23
TOP VIEW
1: GND
2: RESET (RESET)
3: VCC
3
1
2
SOT-23 Marking
Part No.
AIC809-23CU
AIC809-26CU
AIC809-29CU
AIC809-31CU
AIC809-40CU
AIC809-44CU
AIC809-46CU
Marking
RA23
RA26
RA29
RA31
RA40
RA44
RA46
Part No.
AIC809N23CU
AIC809N26CU
AIC809N29CU
AIC809N31CU
AIC809N40CU
AIC809N44CU
AIC809N46CU
Marking
RB23
RB26
RB29
RB31
RB40
RB44
RB46
Part No.
AIC810-23CU
AIC810-26CU
AIC810-29CU
AIC810-31CU
AIC810-40CU
AIC810-44CU
AIC810-46CU
Marking
RD23
RD26
RD29
RD31
RD40
RD44
RD46
2
AIC809/AIC810
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
AIC809-23
AIC809-26
AIC809-29
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
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
20
Reset Threshold
V
TH
AIC809-31
AIC809-40
AIC809-44
AIC809-46
V
V
CC
to Reset Delay
Reset Active Timeout Period
RESET
Output Voltage
T
RD
T
RP
V
OH
V
OL
V
OH
V
OL
V
CC
=V
TH
to (V
TH
-0.1V), V
TH
=3.1V
V
CC
= V
TH (MAX)
140
100
0.8V
CC
µS
560
1030
0.2Vcc
mS
V
V
230
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
RESET Output Voltage
0.8V
CC
0.2Vcc
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 AIC809; RESET output is for AIC810.
4
AIC809/AIC810
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
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