AME AME8570

AME, Inc.
µProcessor Supervisory
AME8570
n General Description
n Functional Block Diagram
AME8570 Push-Pull RESET/ RESETB
The AME8570 family allows the user to customize the
CPU reset function without any external components.
The user has serveral choice of reset voltage thresholds,
reset time intervals, and output driver configurations, all
of which are preset at the factory.
These circuits monitor the power supply voltage of µP
based systems. When the power supply voltage drops
below the voltage threshold a reset is asserted immediately ( within an interval TD1 ). The reset remains asserted
after the supply voltage rises above the voltage threshold
for a time interval, TD2. The reset output may be either
active high ( RESET ) or active low ( RESETB ). The
reset output may be configured as either push/pull or
open drain. The state of the reset output is guaranteed
to be correct only when supply voltage is greater than
1V.
IN
R1
RESET/
RESETB
Delay
R2
VREF
N1
GND
AME8570 Open-Drain RESET/RESETB
IN
R1
I1
RESET/
RESETB
Delay
The AME8570 also provide a reset manually by pulling
the MRB input to ground.
Space saving SC-70 package and micropower quiescent current ( < 5.0µA ) make this family a natural for
portable battery powered equipment.
P1
I1
R2
VREF
N1
GND
n Features
AME8570 Push-Pull RESET/ RESETB with MRB
MRB
l Small Packages : SC-70, SOT-23
IN
l Tight Voltage Threshold Tolerance :
R1
± 1.50%
l Wide Temperature Range : -40OC to 85OC
RESET/
RESETB
Delay
l Low Quiescent Current < 5.0 µA
R2
l Manual Reset Input Option
l All AME's Lead Free Products Meet RoHS
P1
I1
VREF
N1
GND
Standards
AME8570 Open-Drain RESET/ RESETB with MRB
n Applications
MRB
IN
l Portable Electronics
R1
l Power Supplies
I1
l Computer Peripherals
l Data Acquisition Systems
R2
l Applications using CPUs
l Consumer Electronics
1
RESET/
RESETB
Delay
VREF
N1
GND
Rev. A.01
AME, Inc.
µProcessor Supervisory
AME8570
n Typical Operating Circuit
VIN
R*PULL-UP
VIN
µP
PUSH BUTTON RESET / RESETB
SWITCH
MRB
GND
RESET
INPUT
GND
Note: * External pull-up resistor is required if open-drain output is used. 10KΩ is recommended.
n Pin Configuration
SC-70-3
Top View
SOT-23
Top View
AME8570AEIT
3
AME8570AEET
3
1. GND
1. GND
2. RESET/RESETB
2. RESET/RESETB
AME8570
1
3. IN
AME8570
1
2
* Die Attach:
Non-Conductive Epoxy
3. IN
2
* Die Attach:
Non-Conductive Epoxy
SC-70-4
Top View
4
3
AME8570AEIU
1. GND
2. RESET/RESETB
AME8570
3. MRB
4. IN
1
2
* Die Attach:
Non-Conductive Epoxy
2
Rev. A.01
AME, Inc.
µProcessor Supervisory
AME8570
n Pin Description
AME8570AEIT / AME8570AEET
Pin Number
Pin Name
1
GND
2
RESET/RESETB
This pin can be ordered as RESET or RESETB. Reset is active high.
RESETB is active low. It is also available with an open-drain or push-pull
output.
IN
Positive power supply. A reset is asserted after this voltage drops below
a predetermined level. After VIN rises above that level the reset output
remains asserted until the end of the reset timeout period.
Pin Number
Pin Name
Pin Description
1
GND
2
RESET/RESETB
3
Pin Description
Ground
AME8570AEIU
3
3
MRB
4
IN
Ground
This pin can be ordered as RESET or RESETB. Reset is active high.
RESETB is active low. It is also available with an open-drain or push-pull
output.
Manual RESET. Active low. Pulling this pin low forces a reset. After a
low to high transition reset, remains asserted for exactly one reset timeout
period. This pin is internally pulled high. The pin is floating or tied to VIN ,
if it is unused.
Positive power supply. A reset is asserted after this voltage drops below
a predetermined level. After VIN rises above that level the reset output
remains asserted until the end of the reset timeout period.
Rev. A.01
AME, Inc.
µProcessor Supervisory
AME8570
n Ordering Information
AME8570 x x x x x x xx x
Special Feature
VIN Threshold Voltage (VTH)
Reset Time (TD2NOM)
Output Driver Option
Number of Pins
Package Type
Operating Ambient Temperature Range
Pin Configuration
Pin
Configuration
Operating Ambient
Temperature Range
E: -40OC to 85OC
1. GND
(SOT-23 ) 2. RESET/
(SC-70 -3)
RESETB
3. IN
A
A
(SC-70 -4)
Package
Type
E: SOT-2X
I: SC-70
Number
of
Pins
T: 3
U: 4
Output Options
A:
B:
C:
D:
RESETB/PP
RESETB/OD
RESET/PP
RESET/OD
Reset Time
(T D2NOM)
VIN Threshold
Voltage (VTH)
Special
Feature
F: 210ms
23: V TH=2.32V
26: V TH=2.63V
29: V TH=2.93V
31: V TH=3.08V
46: V TH=4.63V
Z: Lead free
1. GND
2. RESET/
RESETB
3. MRB
4. IN
(RESET=Active High)
(RESETB=Active Low)
(PP=Push-pull out)
(OD=Open-Drain
4
Rev. A.01
AME, Inc.
µProcessor Supervisory
AME8570
n Ordering Information
Part Number
Marking*
Output Voltage
Package
Operating Ambient
Temperature Range
AME8570AEETAF23Z
BJOww
2.32V
SOT-23
-40oC to 85oC
AME8570AEITAF23Z
BJPw
2.32V
SC-70-3
-40oC to 85oC
AME8570AEIUAF23Z
BJQw
2.32V
SC-70-4
-40oC to 85oC
AME8570AEETAF26Z
BJRww
2.63V
SOT-23
-40oC to 85oC
AME8570AEITAF26Z
BJSw
2.63V
SC-70-3
-40oC to 85oC
AME8570AEIUAF26Z
BJTw
2.63V
SC-70-4
-40oC to 85oC
AME8570AEETAF29Z
BJUww
2.93V
SOT-23
-40oC to 85oC
AME8570AEITAF29Z
BJVw
2.93V
SC-70-3
-40oC to 85oC
AME8570AEIUAF29Z
BJWw
2.93V
SC-70-4
-40oC to 85oC
AME8570AEETCF29Z
BJXww
2.93V
SOT-23
-40oC to 85oC
AME8570AEITCF29Z
BJYw
2.93V
SC-70-3
-40oC to 85oC
AME8570AEIUCF29Z
BJZw
2.93V
SC-70-4
-40oC to 85oC
AME8570AEETAF31Z
BKAww
3.08V
SOT-23
-40oC to 85oC
AME8570AEITAF31Z
BKBw
3.08V
SC-70-3
-40oC to 85oC
AME8570AEIUAF31Z
BKCw
3.08V
SC-70-4
-40oC to 85oC
AME8570AEETBF31Z
BKDww
3.08V
SOT-23
-40oC to 85oC
AME8570AEITBF31Z
BKEw
3.08V
SC-70-3
-40oC to 85oC
AME8570AEIUBF31Z
BKFw
3.08V
SC-70-4
-40oC to 85oC
AME8570AEETAF46Z
BKGww
4.63V
SOT-23
-40oC to 85oC
AME8570AEITAF46Z
BKHw
4.63V
SC-70-3
-40oC to 85oC
AME8570AEIUAF46Z
BKIw
4.63V
SC-70-4
-40oC to 85oC
AME8570AEETCF46Z
BKJww
4.63V
SOT-23
-40oC to 85oC
AME8570AEITCF46Z
BKKw
4.63V
SC-70-3
-40oC to 85oC
AME8570AEIUCF46Z
BKLw
4.63V
SC-70-4
-40oC to 85oC
Note: ww & w represents the date code and pls refer to the Date Code Rule on Package Dimension.
* A line on top of the first letter represents lead free plating such as BJOww.
Pls consult AME sales office or authorized Rep./Distributor for the availability of output voltage or package type.
5
Rev. A.01
AME, Inc.
µProcessor Supervisory
AME8570
n Absolute Maximum Ratings
Parameter
Maximum
Unit
6
V
20
mA
Supply Voltage
Input Current, VIN
Output Current, RESET, RESETB
B*
ESD Classification
Note: Caution: Stress above the listed in absolute maximum ratings may cause permanent damage to the device.
* HBM B: 2000V ~ 3999V
n Recommended Operating conditions
Parameter
Symbol
Rating
Unit
Ambient Temperature Range
TA
- 40 to 85
Junction Temperature Range
TJ
- 40 to 125
Storage Temperature Range
TSTG
- 65 to 150
O
C
n Thermal Information
Parameter
Thermal Resistance*
(Junction to Case)
Package
Die Attach
Symbol Maximum
θJC
SOT-23
Unit
140
o
C/W
Thermal Resistance
(Junction to Ambient)
SOT-23
Internal Power Dissipation
SOT-23
Non-Conductive
Epoxy
Solder Iron (10 Sec) **
θJA
280
PD
400
350
mW
o
C
* Measure θJC on center of molding compound if IC has no tab.
** MIL-STD-202G 210F
6
Rev. A.01
AME, Inc.
µProcessor Supervisory
AME8570
n Electrical Specifications
TA = 25OC unless otherwise noted.
Parameter
VIN Range
Symbol
Test Condition
VRANGE
TA = -40oC to 85oC
o
Supply Current
RESET Threshold
IIN
1
Max
Units
5.5
V
5
10
µA
VTH
-1.5%
VTH
+1.5%
TA = -40 C to 85 C
VTH
-2%
VTH
+2%
VRelease - VTH
10
VTH
VHYST
Typ
o
VIN = VTH x1.10, TA = -40 C to 85 C
MRB unconnected
o
Hysteresis Range
Min
o
30
60
V
mV
ISOURCE = 0.5mA,
RESETB Output
Voltage High
VIN > VTH (MAX)
VIN > 1.8V
ISOURCE = 0.15mA,
1.8V >= VIN > 1.0V
ISOURCE = 0.5mA,
VOH
0.8V IN
V
VIN > 1.8V
ISOURCE = 0.15mA,
RESET Output
Voltage High
VIN < VTH (MIN)
RESETB Output Voltage Low
VIN < VTH (MIN)
ISINK = 1.2mA,
VIN > VTH (MAX)
TJ = -40oC to 85oC
1.8V >= VIN > 1.0V
RESET Output Voltage Low
VOL
VIN to RESET Delay
TD1
RESET Timeout Period
TD2
MRB Input Threshold
MRB Pulse Width
MRB IL
MRB IH
0.5
VIN = VTH -100mV; TA = -40oC to 85oC
TA = -40oC to 85oC
Version F
VIN = VTH x 1.2
µS
40
140
210
V
600
0.7
0.8V IN
mS
V
µS
1
MRB Noise Immunity
(pulse width with no reset)
100
nS
MRB to RESET Delay
500
nS
MRB Pull Up Resistance
7
80
120
KΩ
Rev. A.01
AME, Inc.
µProcessor Supervisory
AME8570
n Timing Diagram
VRelease
VTH
VIN
TD2
50%
TD1
50%
TD1
50%
RESET
TD2
50%
RESETB
n Applications Information
Supply Transients
These devices have a certain immunity to fast negative
going transients. In the following pages the graph titled
"Glitch Rejection" indicates the maximum allowable glitch
amplitude and duration to avoid triggering an unintended
reset. As shown in the graph shorter transients can have
larger amplitudes without triggering resets.
Glitch Rejection
Reset Time vs. Temperature
600
140
550
500
Reset Time (ms)
Glitch Duration (µS)
120
100
80
60
40
400
350
300
250
20
200
0
0.01
0.1
Glitch Amplitude (V)
8
450
1
150
-45 -35 -25 -15 -5
5
15
25
35
45
55
65
75
85
95 105 115
Temperature (oC)
Rev. A.01
AME, Inc.
AME8570
µProcessor Supervisory
n Detailed Description
The AME8570 are designed to interface with the reset
input of a microprocessor and to prevent code-execution
errors due to power up, power down, and other power
supply errors.
Reset Output
Each output pin in the family can be configured to be
either push-pull or open-drain. In addition each output may
be either active high or active low. Active high reset outputs are denoted as RESET. Active low reset outputs
are denoted as RESETB. The selection guide on this
data sheet shows all possible combinations of output
driver configuration.
A reset will be asserted if any of two things happen:
1) VIN drops below the threshold (VTH)
2) The MRB pin is pulled low.
The reset will remain asserted for the prescribed reset
interval after:
1) VIN rises above the threshold (VTH)
2) MRB goes high
Manual Reset Input
The AME8570 feature a manual reset feature (MRB).
A logic low on the MRB pin asserts a reset. The reset
remains asserted as long as the MRB pin remains low.
After the MRB pin transitions to a high state the reset
remains asserted for the prescribed reset interval (TD2).
The MRB pin is internally pulled up to VIN by a 100K
resistor. It is internally debounced to reject switching
transients.
The MRB pin is ESD protected by diodes connected
to VIN and GND. So the MRB pin should never be driven
higher than VIN or lower than GND.
Glitch Rejection
The AME8570 family will reject negative going transients
on the VIN line to some extent. The smaller the duration
of the transient the larger its amplitude may be without
triggering a reset. The "Glitch Rejection" chart in the
graphs section of this datasheet shows the relation between glitch amplitude and allowable glitch duration to
avoid unintended resets.
Accurate Output State at Low VIN
With VIN voltage on the order of the MOS transistor
threshold (<1.0V) the outputs of the AME8570 may become undefined. For parts with active low output
(RESETB) a resistor placed between RESETB and GND
on the order of 100K will ensure that the RESETB output
stays low when VIN is lower than the threshold voltage of
the part. In a like manner a resistor on the order of 100K
when placed between RESET and VIN will ensure parts
with active high output (RESET) will remain high when
VIN is lower than the threshold voltage of the part.
9
Rev. A.01
AME, Inc.
µProcessor Supervisory
AME8570
Reset VTH vs. Temperature
IIN vs. Temperature
2.70
2.69
3.0
2.68
AME8570AEETAF26
Reset Vth (V)
Supply Current @ 5V (µA)
3.5
2.5
2.0
AME8570AEETAF26
2.67
2.66
2.65
2.64
2.63
2.62
1.5
2.61
1.0
-45 -35 -25 -15
-5
5
15
25
35
45
55
65
75
85
2.60
-45 -35 -25 -15 -5
95 105 115
Temperature (oC)
Temperature (oC)
Threshold Hysteresis vs. Temperature
IIN vs. VIN
2.8
0.030
2.4
0.025
85oC
1.6
Hysteresis (V)
IIN (µA)
2.0
0o C
1.2
-40oC
0.8
0.020
0.015
0.010
0.005
0.4
0.0
0.0
5 15 25 35 45 55 65 75 85 95 105 115
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
VIN (V)
0.000
-40
-20
0
20
40
60
80
Temperature (oC)
Reset VOL vs. Temperature
0.034
Reset VOL @ 0.8mA (V)
0.032
0.030
0.028
AME8570AEETAF26
0.026
0.024
0.022
0.020
0.018
0.016
0.014
0.012
0.010
-45 -35 -25 -15 -5
5 15 25 35 45 55 65 75 85 95 105 115
Temperature (oC)
10
Rev. A.01
AME, Inc.
µProcessor Supervisory
AME8570
n Date Code Rule
For SOT-23 Package Only
Marking
Date Code
Year
A
A
A
W
W
xxx0
A
A
A
W
W
xxx1
A
A
A
W
W
xxx2
A
A
A
W
W
xxx3
A
A
A
W
W
xxx4
A
A
A
W
W
xxx5
A
A
A
W
W
xxx6
A
A
A
W
W
xxx7
A
A
A
W
W
xxx8
A
A
A
W
W
xxx9
Date Code
Year
For SC-70 Package Only
Marking
11
w: Work Week Code
A
A
A
W
xxx0
A:
01&02
K:
21&22
U:
41&42
A
A
A
W
xxx1
B:
03&04
L:
23&24
V:
43&44
A
A
A
W
xxx2
C:
05&06
M:
25&26
W:
45&46
A
A
A
W
xxx3
D:
07&08
N:
27&28
X:
47&48
A
A
A
W
xxx4
E:
09&10
O:
29&30
Y:
49&50
A
A
A
W
xxx5
F:
11&12
P:
31&32
Z:
51&52
A
A
A
W
xxx6
G:
13&14
Q:
33&34
A
A
A
W
xxx7
H:
15&16
R:
35&36
A
A
A
W
xxx8
I:
17&18
S:
37&38
A
A
A
W
xxx9
J:
19&20
T:
39&40
Rev. A.01
AME, Inc.
µProcessor Supervisory
AME8570
n Tape and Reel Dimension
SOT-23
P
W
AME
AME
PIN 1
Carrier Tape, Number of Components Per Reel and Reel Size
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
SOT-23
8.0±0.1 mm
4.0±0.1 mm
3000pcs
180±1 mm
SC-70-3
P
W
AME
AME
PIN 1
Carrier Tape, Number of Components Per Reel and Reel Size
12
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
SC-70-3
8.0±0.1 mm
4.0±0.1 mm
3000pcs
180±1 mm
Rev. A.01
AME, Inc.
µProcessor Supervisory
AME8570
n Tape and Reel Dimension
SC-70-4
P
W
AME
AME
PIN 1
Carrier Tape, Number of Components Per Reel and Reel Size
13
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
SC-70-4
8.0±0.1 mm
4.0±0.1 mm
3000pcs
180±1 mm
Rev. A.01
AME, Inc.
µProcessor Supervisory
AME8570
n Package Dimension
SOT-23
Top View
Side View
SYMBOLS
INCHES
MIN
MAX
MIN
MAX
A
1.00
1.40
0.0394
0.0551
A1
0.00
0.15
0.0000
0.0059
b
0.35
0.50
0.0138
0.0197
D
2.70
3.10
0.1063
0.1220
E
1.40
1.80
0.0551
0.0709
E
H
L
D
MILLIMETERS
1.90 BSC
e
e
θ1
H
2.40
θ1
3.00
0.35BSC
L
0
o
10
0.09449 0.11811
0.0138BSC
o
0o
10 o
b
14
A1
A
Front View
0.0748 BSC
Rev. A.01
AME, Inc.
µProcessor Supervisory
AME8570
n Package Dimension
SC-70-3
Top View
Side View
SYMBOLS
D
0.15(0.006)
e1
D
E/2
E1/2
E
E1
0.15(0.006)
A
C
e
See Detail A
B
.10(0.004) M
CAB
b
Front View
MAX
MIN
MAX
A
0.80
1.10
0.031
0.043
A1
0.00
0.10
0.000
0.004
A2
0.80
1.00
0.031
0.039
b
0.15
0.40
0.006
0.016
b1
0.15
0.25
0.006
0.010
c
0.08
0.25
0.003
0.010
c1
0.08
0.20
0.003
0.008
D
1.90
2.20
0.075
0.087
E
2.00
2.45
0.079
0.096
E1
1.15
1.35
0.045
0.053
e
A2
A
SEATING PLANE
.10(0.004)
A1
C
Detail A
C
INCHES
MIN
C
A
MILLIMETERS
0.65BSC
0.0255BSC
e1
1.20
1.40
0.047
0.055
L
0.26
0.46
0.010
0.018
θ1
0o
8o
0o
8o
θ2
4o
10o
4o
10o
SECTION A-A
θ1
(b)
b1
c1 c
.15(.0059)
H
GAGE
PLANE
BASE METAL
θ
L
15
Rev. A.01
AME, Inc.
µProcessor Supervisory
AME8570
n Package Dimension
SC-70-4
D
e1
θ
e
SYMBOLS
L
E
E1
L1
0.20
c
d
b
b1
SIDE VIEW
MAX
MIN
MAX
A
0.900
1.100
0.035
0.043
A1
0.000
0.100
0.000
0.004
A2
0.900
1.000
0.035
0.039
b
0.250
0.400
0.010
0.016
b1
0.350
0.500
0.014
0.020
c
0.080
0.150
0.003
0.006
d
0.050 TYP
0.002 TYP
D
2.000
2.200
0.079
0.087
E
1.150
1.350
0.045
0.053
E1
2.150
2.450
0.085
0.096
e1
L
L1
θ
A2
INCHES
MIN
e
TOP VIEW
MILLIMETERS
0.650 TYP
1.200
0.026TYP
1.400
0.525 REF
0.260
0
o
0.055
0.021 REF
0.460
8
0.047
o
0.010
0
o
0.018
8o
A
A1
FRONT VIEW
16
Rev. A.01
www.ame.com.tw
E-Mail: sales@ame.com.tw
Life Support Policy:
These products of AME, Inc. are not authorized for use as critical components in life-support
devices or systems, without the express written approval of the president
of AME, Inc.
AME, Inc. reserves the right to make changes in the circuitry and specifications of its devices and
advises its customers to obtain the latest version of relevant information.
 AME, Inc. , July 2007
Document: 1221-DS8570-A.01
Corporate Headquarter
U.S.A (Subsidiary)
AME, Inc.
Analog Microelectronics, Inc.
2F, 302 Rui-Guang Road, Nei-Hu District
3100 De La Cruz Blvd., Suite 201
Taipei 114, Taiwan.
Tel: 886 2 2627-8687
Santa Clara, CA. 95054-2046
Tel : (408) 988-2388
Fax: 886 2 2659-2989
Fax: (408) 988-2489