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AME, Inc.
AME8570
n General Description
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 P 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. The AME8570 also provide a reset manually by pulling the MRB input to ground. Space saving SC-70 package and micropower quiescent current ( < 5.0A ) make this family a natural for portable battery powered equipment.
GND
Processor Supervisory
n Functional Block Diagram
AME8570 Push-Pull RESET/ RESETB
IN R1 I1 Delay R2 GND VREF N1 P1 RESET/ RESETB
AME8570 Open-Drain RESET/RESETB
IN R1 I1
Delay
RESET/ RESETB N1
R2
VREF
n Features
l Small Packages : SC-70, SOT-23 l Tight Voltage Threshold Tolerance : 1.50% l Wide Temperature Range : -40OC to 85OC l Low Quiescent Current < 5.0 A l Manual Reset Input Option l All AME's Lead Free Products Meet RoHS Standards
AME8570 Push-Pull RESET/ RESETB with MRB
MRB IN R1 I1 Delay R2 GND VREF N1 P1 RESET/ RESETB
AME8570 Open-Drain RESET/ RESETB with MRB
n Applications
l Portable Electronics l Power Supplies l Computer Peripherals l Data Acquisition Systems l Applications using CPUs l Consumer Electronics
1
MRB IN R1 I1 Delay R2 GND VREF N1 RESET/ RESETB
Rev. A.01
AME, Inc.
AME8570
n Typical Operating Circuit
Processor Supervisory
VIN
R*PULL-UP
VIN P
PUSH BUTTON RESET / RESETB SWITCH MRB GND
RESET INPUT GND
Note: * External pull-up resistor is required if open-drain output is used. 10K is recommended.
n Pin Configuration
SC-70-3 Top View
3
SOT-23 Top View AME8570AEIT 1. GND 2. RESET/RESETB
3
AME8570AEET 1. GND 2. RESET/RESETB
AME8570
3. IN
AME8570
3. IN
1
2
1
2
* Die Attach: Non-Conductive Epoxy SC-70-4 Top View
4 3
* Die Attach: Non-Conductive Epoxy
AME8570AEIU 1. GND 2. RESET/RESETB
AME8570
3. MRB 4. IN
1
2
* Die Attach: Non-Conductive Epoxy
2 Rev. A.01
AME, Inc.
AME8570
n Pin Description
AME8570AEIT / AME8570AEET
Processor Supervisory
Pin Number
1 2
Pin Name
GND RESET/RESETB Ground
Pin Description
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. 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.
3
IN
AME8570AEIU
Pin Number
1 2
Pin Name
GND RESET/RESETB Ground
Pin Description
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.
3
MRB
4
IN
3
Rev. A.01
AME, Inc.
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
Processor Supervisory
Pin Configuration
Operating Ambient Temperature Range
Package Type
Number of Pins T: 3 U: 4
Output Options
Reset Time (T D2NOM)
VIN Threshold Voltage (VTH) 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
Special Feature
E: -40OC to 85OC 1. GND (SOT-23 ) 2. RESET/ (SC-70 -3) RESETB 3. IN A A
(SC-70 -4)
E: SOT-2X I: SC-70
A: B: C: D:
RESETB/PP RESETB/OD RESET/PP RESET/OD
F: 210ms
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.
AME8570
n Ordering Information
Part Number
AME8570AEETAF23Z AME8570AEITAF23Z AME8570AEIUAF23Z AME8570AEETAF26Z AME8570AEITAF26Z AME8570AEIUAF26Z AME8570AEETAF29Z AME8570AEITAF29Z AME8570AEIUAF29Z AME8570AEETCF29Z AME8570AEITCF29Z AME8570AEIUCF29Z AME8570AEETAF31Z AME8570AEITAF31Z AME8570AEIUAF31Z AME8570AEETBF31Z AME8570AEITBF31Z AME8570AEIUBF31Z AME8570AEETAF46Z AME8570AEITAF46Z AME8570AEIUAF46Z AME8570AEETCF46Z AME8570AEITCF46Z AME8570AEIUCF46Z
Processor Supervisory
Marking*
BJOww BJPw BJQw BJRww BJSw BJTw BJUww BJVw BJWw BJXww BJYw BJZw BKAww BKBw BKCw BKDww BKEw BKFw BKGww BKHw BKIw BKJww BKKw BKLw
Output Voltage
2.32V 2.32V 2.32V 2.63V 2.63V 2.63V 2.93V 2.93V 2.93V 2.93V 2.93V 2.93V 3.08V 3.08V 3.08V 3.08V 3.08V 3.08V 4.63V 4.63V 4.63V 4.63V 4.63V 4.63V
Package
SOT-23 SC-70-3 SC-70-4 SOT-23 SC-70-3 SC-70-4 SOT-23 SC-70-3 SC-70-4 SOT-23 SC-70-3 SC-70-4 SOT-23 SC-70-3 SC-70-4 SOT-23 SC-70-3 SC-70-4 SOT-23 SC-70-3 SC-70-4 SOT-23 SC-70-3 SC-70-4
Operating Ambient Temperature Range
-40oC to 85oC -40oC to 85oC -40oC to 85oC -40oC to 85oC -40oC to 85oC -40oC to 85oC -40oC to 85oC -40oC to 85oC -40oC to 85oC -40oC to 85oC -40oC to 85oC -40oC to 85oC -40oC to 85oC -40oC to 85oC -40oC to 85oC -40oC to 85oC -40oC to 85oC -40oC to 85oC -40oC to 85oC -40oC to 85oC -40oC to 85oC -40oC to 85oC -40oC to 85oC -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.
AME8570
n Absolute Maximum Ratings
Parameter
Supply Voltage Input Current, VIN 20 Output Current, RESET, RESETB ESD Classification B* mA
Processor Supervisory
Maximum
6
Unit
V
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
Ambient Temperature Range Junction Temperature Range Storage Temperature Range
Symbol
TA TJ TSTG
Rating
- 40 to 85 - 40 to 125 - 65 to 150
Unit
O
C
n Thermal Information
Parameter
Thermal Resistance* (Junction to Case) Thermal Resistance (Junction to Ambient) Internal Power Dissipation Solder Iron (10 Sec) **
Package
SOT-23
Die Attach
Symbol Maximum
JC 140
Unit
o
C/W
SOT-23
Non-Conductive Epoxy
JA PD
280
SOT-23
400 350
mW
o
C
* Measure JC on center of molding compound if IC has no tab. ** MIL-STD-202G 210F
6
Rev. A.01
AME, Inc.
AME8570
n Electrical Specifications
TA = 25OC unless otherwise noted.
Parameter VIN Range Supply Current Symbol VRANGE IIN Test Condition TA = -40oC to 85oC VIN = VTH x1.10, TA = -40 C to 85 C MRB unconnected VTH -1.5% TA = -40 C to 85 C Hysteresis Range RESETB Output Voltage High VOH RESET Output Voltage High RESETB Output Voltage Low RESET Output Voltage Low VIN to RESET Delay RESET Timeout Period MRB Input Threshold MRB Pulse Width MRB Noise Immunity (pulse width with no reset) MRB to RESET Delay MRB Pull Up Resistance 80 VIN < VTH (MIN) VHYST VRelease - VTH ISOURCE = 0.5mA, VIN > VTH (MAX) VIN > 1.8V ISOURCE = 0.15mA, 1.8V >= VIN > 1.0V ISOURCE = 0.5mA, VIN > 1.8V ISOURCE = 0.15mA, 1.8V >= VIN > 1.0V VOL TD1 TD2 MRB IL MRB IH VIN < VTH (MIN) VIN > VTH (MAX) TA = -40oC to 85oC ISINK = 1.2mA, TJ = -40oC to 85oC 40 140 210 600 0.7 0.8V IN 1 100 500 120 0.5 V S mS V S nS nS K 0.8V IN V
o o o o
Processor Supervisory
Min 1
Typ
Max 5.5
Units V A
5
10 VTH +1.5% VTH +2%
RESET Threshold
VTH
VTH -2% 10 30
V
60
mV
VIN = VTH -100mV; TA = -40oC to 85oC Version F
VIN = VTH x 1.2
7
Rev. A.01
AME, Inc.
AME8570
n Timing Diagram
VRelease VTH
Processor Supervisory
VIN
TD2
50% RESET
TD1
50%
TD2
50% RESETB
TD1
50%
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
140 120
600 550 500
Reset Time vs. Temperature
Glitch Duration (S)
100 80 60 40 20 0 0.01 0.1 1
Reset Time (ms)
450 400 350 300 250 200 150 -45 -35 -25 -15 -5
5
15
25
35
45
55
65
75
85
95 105 115
Glitch Amplitude (V)
Temperature (oC)
8
Rev. A.01
AME, Inc.
AME8570
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. 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.
Processor Supervisory
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.
The reset will remain asserted for the prescribed reset interval after: 1) VIN rises above the threshold (VTH) 2) MRB goes high
9
Rev. A.01
AME, Inc.
AME8570
IIN vs. Temperature
3.5
Processor Supervisory
Reset VTH vs. Temperature
2.70 2.69
Supply Current @ 5V (A)
3.0
AME8570AEETAF26
2.68
AME8570AEETAF26
2.5
Reset Vth (V)
2.67 2.66 2.65 2.64 2.63 2.62 2.61
2.0
1.5
1.0 -45 -35 -25 -15
-5
5
15
25
35
45
55
65
75
85
95 105 115
2.60 -45 -35 -25 -15 -5
5 15 25 35 45 55 65 75 85 95 105 115
Temperature (oC)
Temperature (oC)
IIN vs. VIN
2.8 2.4
Threshold Hysteresis vs. Temperature
0.030
85oC
0.025
Hysteresis (V)
2.0
0.020
IIN (A)
1.6
0o C
0.015
1.2 0.8 0.4
-40oC
0.010
0.005
0.0 0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0.000 -40
-20
0
20
40
60
80
VIN (V)
Temperature (oC)
Reset VOL vs. Temperature
0.034 0.032
Reset VOL @ 0.8mA (V)
0.030 0.028 0.026 0.024 0.022 0.020 0.018 0.016 0.014 0.012
AME8570AEETAF26
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.
AME8570
n Date Code Rule
For SOT-23 Package Only
Marking A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A Date Code W W W W W W W W W W W W W W W W W W W W Year xxx0 xxx1 xxx2 xxx3 xxx4 xxx5 xxx6 xxx7 xxx8 xxx9
Processor Supervisory
For SC-70 Package Only
Marking A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A Date Code W W W W W W W W W W Year xxx0 xxx1 xxx2 xxx3 xxx4 xxx5 xxx6 xxx7 xxx8 xxx9
w: Work Week Code A: B: C: D: E: F: G: H: I: J: 01&02 03&04 05&06 07&08 09&10 11&12 13&14 15&16 17&18 19&20 K: L: M: N: O: P: Q: R: S: T: 21&22 23&24 25&26 27&28 29&30 31&32 33&34 35&36 37&38 39&40 U: V: W: X: Y: Z: 41&42 43&44 45&46 47&48 49&50 51&52
11
Rev. A.01
AME, Inc.
AME8570
n Tape and Reel Dimension
SOT-23
P
Processor Supervisory
W AME PIN 1 AME
Carrier Tape, Number of Components Per Reel and Reel Size
Package SOT-23 Carrier Width (W) 8.00.1 mm Pitch (P) 4.00.1 mm Part Per Full Reel 3000pcs Reel Size 1801 mm
SC-70-3
P
W AME PIN 1 AME
Carrier Tape, Number of Components Per Reel and Reel Size
Package SC-70-3 Carrier Width (W) 8.00.1 mm Pitch (P) 4.00.1 mm Part Per Full Reel 3000pcs Reel Size 1801 mm
12
Rev. A.01
AME, Inc.
AME8570
n Tape and Reel Dimension
SC-70-4
P
Processor Supervisory
W AME PIN 1 AME
Carrier Tape, Number of Components Per Reel and Reel Size
Package SC-70-4 Carrier Width (W) 8.00.1 mm Pitch (P) 4.00.1 mm Part Per Full Reel 3000pcs Reel Size 1801 mm
13
Rev. A.01
AME, Inc.
AME8570
n Package Dimension
SOT-23
Top View D Side View
Processor Supervisory
SYMBOLS A
L
MILLIMETERS MIN
1.00 0.00 0.35 2.70 1.40
INCHES MIN
0.0394 0.0000 0.0138 0.1063 0.0551
MAX
1.40 0.15 0.50 3.10 1.80
MAX
0.0551 0.0059 0.0197 0.1220 0.0709
A1 b D E e
E
H
1.90 BSC 2.40 3.00
0.0748 BSC 0.09449 0.11811 0.0138BSC
o
e
c1
H L 1
0.35BSC 0
o
Front View
10
0o
10 o
14
A1
b
A
Rev. A.01
AME, Inc.
AME8570
n Package Dimension
SC-70-3
Processor Supervisory
Top View D e1
0.15(0.006)
Side View
SYMBOLS
C A A D
MILLIMETERS MIN MAX
1.10 0.10 1.00 0.40 0.25 0.25 0.20 2.20 2.45 1.35
INCHES MIN
0.031 0.000 0.031 0.006 0.006 0.003 0.003 0.075 0.079 0.045
MAX
0.043 0.004 0.039 0.016 0.010 0.010 0.008 0.087 0.096 0.053
A A1 A2
0.80 0.00 0.80 0.15 0.15 0.08 0.08 1.90 2.00 1.15
E1/2 E1
0.15(0.006)
E/2 E
b b1 c
C e
.10(0.004) M
B CAB b
See Detail A
c1 D E E1 e e1
Front View
0.65BSC 1.20 0.26 0o 4o 1.40 0.46 8o 10o
0.0255BSC 0.047 0.010 0o 4o 0.055 0.018 8o 10o
A2
A
SEATING PLANE
L 1 2
.10(0.004)
C
A1
C
Detail A c1
SECTION A-A
(b) b1 c1 c
.15(.0059)
H
GAGE PLANE
BASE METAL
c L
15
Rev. A.01
AME, Inc.
AME8570
n Package Dimension
SC-70-4
Processor Supervisory
D e1 e
L
SYMBOLS A A1 A2
E
MILLIMETERS MIN
0.900 0.000 0.900 0.250 0.350 0.080
INCHES MIN
0.035 0.000 0.035 0.010 0.014 0.003
MAX
1.100 0.100 1.000 0.400 0.500 0.150
MAX
0.043 0.004 0.039 0.016 0.020 0.006
b b1 c
E1
L1 0.20 c
d D E E1
0.050 TYP 2.000 1.150 2.150 2.200 1.350 2.450
0.002 TYP 0.079 0.045 0.085 0.087 0.053 0.096
d b TOP VIEW b1
e
0.650 TYP 1.200 1.400
0.026TYP 0.047 0.055
SIDE VIEW
e1 L L1
0.525 REF 0.260 0
o
0.021 REF 0.010 0
o
0.460 8
o
0.018 8o
A2
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. (c) AME, Inc. , July 2007 Document: 1221-DS8570-A.01
Corporate Headquarter
AME, Inc.
2F, 302 Rui-Guang Road, Nei-Hu District Taipei 114, Taiwan. Tel: 886 2 2627-8687 Fax: 886 2 2659-2989
U.S.A (Subsidiary)
Analog Microelectronics, Inc.
3100 De La Cruz Blvd., Suite 201 Santa Clara, CA. 95054-2046 Tel : (408) 988-2388 Fax: (408) 988-2489

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