AIC809N44CUTR [AIC]
3-PIN MICROPROCESSOR RESET CIRCUITS; 3引脚微处理器复位电路
| 型号： | AIC809N44CUTR |
| 厂家： | 
ANALOG INTERGRATIONS CORPORATION |
| 描述： | 3-PIN MICROPROCESSOR RESET CIRCUITS |
| 文件： | 总8页 (文件大小：391K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AIC809/AIC810
3-Pin Microprocessor Reset Circuits
ꢀFEATURES
ꢀDESCRIPTION
ꢁ Ultra Low Supply Current 1µA(typ.)
ꢁ Guaranteed Reset Valid to Vcc=0.9V
AIC809/AIC810 are low-power microprocessor (µP)
supervisory circuits used to monitor power supplies in
ꢁ 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
µP and digital systems. They provide applications with
benefits of circuit reliability and low cost by eliminating
external components.
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
VCC supply voltage falls below preset threshold. Both
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
ꢁ Tight Voltage Threshold Tolerance: 1.5%
ꢁ Tiny Package in SOT-23
ꢀAPPLICATIONS
ꢁ Notebook Computers
ꢁ Digital Still Cameras
ꢁ PDAs
ꢁ Critical Microprocessor Monitoring
active-high RESET output, respectively.
Low supply current (1µA) makes AIC809/AIC810 ideal
for portable equipment. The devices are available in
SOT-23 package.
ꢀTYPICAL APPLICATION CIRCUIT
V
CC
VCC
VCC
AIC809
(AIC810)
µP
RESET
INPUT
RESET
(RESET)
GND
GND
Push-Pull Output
Analog Integrations Corporation
Si-Soft Research Center
DS-809P-02 010405
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
1
AIC809/AIC810
ꢀORDERING INFORMATION
AIC809X-XXXXXX
AIC810 -XXXXXX
PIN CONFIGURATION
SOT-23
TOP VIEW
1: GND
3
PACKING TYPE
TR: TAPE & REEL
BG: BAG
2: RESET (RESET)
3: VCC
1
2
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
ꢂ 3.1V and push-pull version, in SOT-23 Package & Tape & Reel Packing Type
AIC809-31-PUTR
ꢂ 3.1V and push-pull version, in Lead Free SOT-23 Package & Tape & Reel Packing
Type
ꢁ
SOT-23 Marking
Part No.
Marking
Part No.
Marking
Part No.
Marking
AIC809-23CU
AIC809-26CU
AIC809-29CU
AIC809-31CU
AIC809-40CU
AIC809-44CU
AIC809-46CU
RA23
RA26
AIC809N23CU
AIC809N26CU
AIC809N29CU
AIC809N31CU
AIC809N40CU
AIC809N44CU
AIC809N46CU
RB23
RB26
AIC810-23CU
AIC810-26CU
AIC810-29CU
AIC810-31CU
AIC810-40CU
AIC810-44CU
AIC810-46CU
RD23
RD26
RA29
RA31
RA40
RA44
RA46
RB29
RB31
RB40
RB44
RB46
RD29
RD31
RD40
RD44
RD46
2
AIC809/AIC810
Part No.
Marking
Part No.
Marking
Part No.
Marking
AIC809-23PU
AIC809-26PU
AIC809-29PU
AIC809-31PU
AIC809-40PU
AIC809-44PU
AIC809-46PU
RA23P
RA26P
AIC809N23PU
AIC809N26PU
AIC809N29PU
AIC809N31PU
AIC809N40PU
AIC809N44PU
AIC809N46PU
RB23P
RB26P
AIC810-23PU
AIC810-26PU
AIC810-29PU
AIC810-31PU
AIC810-40PU
AIC810-44PU
AIC810-46PU
RD23P
RD26P
RA29P
RA31P
RA40P
RA44P
RA46P
RB29P
RB31P
RB40P
RB44P
RB46P
RD29P
RD31P
RD40P
RD44P
RD46P
ꢀABSOLUTE MAXIMUM RATINGS
VCC
-0.3V ~6.5V
-0.3V ~ (VCC+0.3V)
20mA
RESET, RESET
Input Current (VCC)
Output Current (RESET or RESET )
Continuous Power Dissipation (TA = +70°C)
Operating Junction Temperature Range
Junction Temperature
20mA
320mW
-40°C ~ 85°C
125°C
Storage Temperature Range
Lead Temperature (Soldering) 10 sec
- 65°C ~ 150°C
260°C
Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
ꢀTEST CIRCUIT
AIC809
RESET
G ND
VCC
VIN
IIN
3
AIC809/AIC810
ꢀELECTRICAL CHARACTERISTICS
(Typical values are at TA=25°C, unless otherwise specified.) (Note 1)
PARAMETER
Operating Voltage Range
Supply Current
TEST CONDITIONS
MIN.
TYP. MAX. UNIT
SYMBOL
VCC
0.9
6
V
ICC
VCC = VTH +0.1V
1
3
µA
TA=+25°C
2.265
2.3
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
AIC809-23
AIC809-26
AIC809-29
TA= -40°C to +85°C 2.254
TA=+25°C 2.561
TA= -40°C to +85°C 2.548
TA=+25°C 2.857
TA= -40°C to +85°C 2.842
TA=+25°C 3.054
TA= -40°C to +85°C 3.038
TA=+25°C 3.940
TA= -40°C to +85°C 3.920
TA=+25°C 4.334
TA= -40°C to +85°C 4.312
2.6
2.9
3.1
4.0
4.4
4.6
Reset Threshold
VTH AIC809-31
AIC809-40
V
AIC809-44
TA=+25°C
4.531
4.508
AIC809-46
TA=-40°C to +85°C
VCC to Reset Delay
TRD VCC=VTH to (VTH -0.1V), VTH=3.1V
20
µS
TA=+25°C
140
100
230
560
Reset Active Timeout Period TRP VCC = VTH (MAX)
mS
TA= -40°C to +85°C
1030
VOH VCC=VTH+0.1V, ISOURCE=1mA
VOL VCC=VTH - 0.1V, ISINK=1mA
0.8VCC
RESET
Output Voltage
V
V
0.2Vcc
VOH
VOL
0.8VCC
V
CC=VTH-0.1V, ISOURCE=1mA
CC=VTH+0.1V, ISINK=1mA
RESET Output Voltage
0.2Vcc
V
Note1: Specifications are production tested at TA=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).
RESET
Note2:
output is for AIC809; RESET output is for AIC810.
4
AIC809/AIC810
ꢀTYPICAL PERFORMANCE CHARACTERISTICS
120
110
100
90
80
70
60
50
40
30
20
10
0
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
VTH=2.3V
VTH=2.3V
VOD=VTH-VCC
VTH=3.1V
VTH=4.6V
VOD=50mV
VOD=100mV
VOD=200mV
-60
-40
-20
0
20
40
60
80
100
-40
-20
0
20
40
60
80
100
Temperature (°C)
Fig 1 Supply Current vs. Temperature
Temperature (°C)
Fig 2 Power-Down Reset Delay vs. Temperature
240
220
200
180
160
140
120
100
80
VTH=3.1V
VTH=4.6V
VOD=50mV
400
300
200
100
0
VOD=VTH-VCC
VOD=VTH-VCC
VOD=50mV
VOD=100mV
VOD=200mV
60
VOD=100mV
VOD=200mV
40
20
0
-60
-40
-20
0
20
40
60
80
100
-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
500
400
300
200
100
0
1.015
1.010
1.005
1.000
0.995
0.990
0.985
VTH=4.6V
VTH=3.1V
VTH=4.6V
VTH=3.1V
VTH=2.3V
VTH=2.3V
-40
-20
0
20
40
60
80
100
-60
-40
-20
0
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
AIC809/AIC810
ꢀBLOCK DIAGRAMS
VCC
R1
Bandgap
-
RESET
+
Reset Generator
NMOS
R2
GND
N-ch Open-Drain Type
VCC
R1
Bandgap
-
Reset Generator
RESET
+
(RESET)
R2
GND
Push-Pull Type
6
AIC809/AIC810
ꢀPIN DESCRIPTIONS
GND Pin
RESET
: Ground.
Pin (AIC809) : Active low output pin.
threshold.
RESET
Output remains low while Vcc is below the reset
RESET Pin (AIC810) : Active high output pin. RESET output remains high while Vcc is below the reset
threshold.
Vcc Pin
: Supply voltage.
ꢀDETAIL DESCRIPTIONS OF TECHNICAL TERMS
internal timer is activated after VCC returns
RESET OUTPUT
RESET
above the reset threshold, and
low for the reset timeout period.
remains
μP will be activated at a valid reset state. These
μP supervisory circuits assert reset to prevent
code execution errors during power-up,
power-down, or brownout conditions.
BENEFITS OF HIGHLY ACCURATE RESET
THRESHOLD
RESET
AIC809/810 with specified voltage as 5V±10% or
3V±10% are ideal for systems using a 5V±5% or
3V±5% power supply. The reset is guaranteed to
is guaranteed to be a logic low for
VTH>VCC>0.9V. Once VCC exceeds the reset
RESET
threshold, an internal timer keeps
low
for the reset timeout period; after this interval,
RESET
assert after the power supply falls out of regulation,
but before power drops below the minimum
specified operating voltage range of the system
ICs. The pre-trimmed thresholds are reducing the
range over which an undesirable reset may occur.
goes high.
If a brownout condition occurs (VCC drops below
RESET
the reset threshold),
VCC goes below the reset threshold, the internal
RESET
goes low. Any time
timer resets to zero, and
goes low. The
ꢀAPPLICATION INFORMATION
below 0.9V. However in applications where
NEGATIVE-GOING VCC TRANSIENTS
In addition to issuing a reset to the μP during
RESET
must be valid down to 0V, adding a
RESET
pull-down resistor to
causes any leakage
RESET
power-up, power-down, and brownout conditions,
AIC809 series are relatively resistant to
short-duration negative-going VCC transient.
currents to flow to ground, holding
low.
INTERFACING TO μP WITH BIDIRECTIONAL
RESET PINS
ENSURING A VALID RESET OUTPUT DOWN
TO VCC=0
RESET
The
output on the AIC809N is open drain,
this device interfaces easily with μPs that have
bidirectional reset pins. Connecting the μ P
RESET
When VCC falls below 0.9V, AIC809
output no longer sinks current; it becomes an
open circuit. In this case, high-impedance CMOS
RESET
supervisor’s
microcontroller’s
resistor allows either device to assert reset.
output directly to the
RESET
pin with a single pull-up
RESET
logic inputs connecting to
can drift to
undetermined voltages. Therefore, AIC809/810
with CMOS is perfect for most applications of VCC
7
AIC809/AIC810
ꢀPHYSICAL DIMENSIONS (unit: mm)
ꢁ
SOT-23
D
S
Y
M
B
O
L
SOT-23
e
MILLIMETERS
MIN.
0.95
MAX.
1.45
A
A1
A2
b
0.05
0.90
0.30
0.08
0.15
1.30
0.50
0.22
c
A
A
e1
D
E
2.80
2.60
3.00
3.00
SEE VIEW B
b
E1
e
1.50
1.70
WITH PLATING
0.95 BSC
1.90 BSC
e1
BASE METAL
L
0.30
0°
0.60
8°
SECTION A-A
L1
θ
0.60 REF
GAUGE PLANE
SEATING PLANE
L
L1
VIEW B
Note:
Information provided by AIC is believed to be accurate and reliable. However, we cannot assume responsibility for use of any circuitry other
than circuitry entirely embodied in an AIC product; nor for any infringement of patents or other rights of third parties that may result from its
use. We reserve the right to change the circuitry and specifications without notice.
Life Support Policy: AIC does not authorize any AIC product for use in life support devices and/or systems. Life support devices or systems
are devices or systems which, (I) are intended for surgical implant into the body or (ii) support or sustain life, and whose failure to perform,
when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant
injury to the user.
8
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