AME
AME8570M
n
General Description
The AME8570M 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 immedi-
ately ( within an interval T
D1
). The reset remains asserted
after the supply voltage rises above the voltage threshold
for a time interval, T
D2
. 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 AME8570M also provide a reset manually by pull-
ing the MRB input to ground.
Space saving SC-70 package and micropower quies-
cent current (<3.0µA ) make this family a natural for por-
table battery powered equipment.
µProcessor
Supervisory
n
Functional Block Diagram
AME8570M Push-Pull RESET/ RESETB
IN
R1
I1
Delay
R2
GND
V
REF
N1
P1
RESET/
RESETB
AME8570M Open-Drain RESET/RESETB
IN
R1
I1
Delay
R2
V
REF
N1
RESET/
RESETB
n
Features
l
Small Packages : SC-70-4, SOT-23,
TSOT-23A, SOT-25, TSOT-25A, SOT-143
l
Tight Voltage Threshold Tolerance:± 1.50%
l
Wide Temperature Range : -40
O
C to +85
O
C
l
Low Quiescent Current <3.0µA
l
Manual Reset Input Option
l
Green Products Meet RoHS Standards
AME8570M Push-Pull RESET/ RESETB with MRB
MRB
IN
R1
I1
Delay
R2
GND
V
REF
N1
P1
RESET/
RESETB
AME8570M 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
Rev. A.10
GND
R2
V
REF
IN
R1
I1
MRB
Delay
N1
RESET /
RESETB
1
AME
AME8570M
n
Typical Operating Circuit
V
CC
V
IN
R*
PULL-UP
V
IN
µP
PUSH BUTTON RESET / RESETB
SWITCH
MRB
GND
RESET
INPUT
GND
µProcessor
Supervisory
Note: * External pull-up resistor is required if open-drain output is used. 10KΩ is recommended.
n
Pin Configuration
SOT-23/TSOT-23A
Top View
3
SC-70-4
Top View
AME8570M-AETxxxxxx
1. GND
2. RESET/RESETB
4
3
AME8570M-AIUxxxxxx
1. GND
2. RESET/RESETB
3. MRB
4. IN
AME8570M
3. IN
AME8570M
1
1
2
2
* Die Attach:
Non-Conductive Epoxy
SOT-23/TSOT-23A
Top View
3
* Die Attach:
Non-Conductive Epoxy
SOT-23/TSOT-23A
Top View
AME8570M-BETxxxxxx
1. RESET/RESETB
2. GND
3
AME8570M-CETxxxxxx
1. RESET/RESETB
2. IN
AME8570M
3. IN
AME8570M
3. GND
1
2
* Die Attach:
Non-Conductive Epoxy
1
2
* Die Attach:
Conductive Epoxy
2
Rev. A.10
AME
AME8570M
n
Pin Configuration (Contd.)
SOT-25/TSOT-25A
Top View
5
4
µProcessor
Supervisory
SOT-143
Top View
AME8570M-AEVxxxxxx
1. RESET/RESETB
2. IN
4
3
AME8570M-A4Uxxxxxx
1. GND
2. RESET/RESETB
AME8570 M
3. GND
4. NC
5. NC
AME 8570 M
3. MRB
4. IN
1
2
3
1
* Die Attach:
Non-Conductive Epoxy
2
* Die Attach:
Conductive Epoxy
n
Pin Description
AME8570M-AET/AME8570M-BET/AME8570M-CET
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 V
IN
rises above that level the reset output remains
asserted until the end of the reset timeout period.
3
IN
Rev. A.10
3
AME
AME8570M
n
Pin Description (Contd.)
AME8570M-AIU / AME8570M-A4U
µProcessor
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.
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 V
IN
, if it
is unused.
Positive power supply. A reset is asserted after this voltage drops below a
predetermined level. After V
IN
rises above that level the reset output remains
asserted until the end of the reset timeout period.
3
MRB
4
IN
AME8570M-AEV
Pin Number
1
Pin Name
RESET/RESETB
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 V
IN
rises above that level the reset output remains
asserted until the end of the reset timeout period.
Ground.
No Internal Connection.
2
IN
3
4,5
GND
NC
4
Rev. A.10
AME
AME8570M
n
Ordering Information
AME8570M - x x x x x xxx x
Special Feature 1
V
IN
Threshold Voltage (V
TH
)
Reset Time (T
D2NOM
)
Output Option
Number of Pins
Package Type
Pin Configuration
µProcessor
Supervisory
Pin
Configuration
Package
Type
Number
of
Pins
T: 3
U: 4
V: 5
Output Options
Reset Time
(T
D2NOM
)
V
IN
Threshold
Voltage (V
TH
)
Special Feature 1
A
(SOT-23)
(TSOT-23A)
1. GND
2. RESET/
RESETB
3. IN
1. Reset/
ResetB
2. GND
3. IN
1. Reset/
ResetB
2. IN
3. GND
1. GND
2. RESET/
RESETB
3. MRB
4. IN
1. RESET/
RESETB
2. IN
3. GND
4. NC
5. NC
1. GND
2. RESET/
RESETB
3. MRB
4. IN
E:
I:
4:
SOT-2X
SC-70
SOT-143
A:
B:
C:
D:
RESETB/PP
RESETB/OD
RESET/PP
RESET/OD
A: 1.5ms
E: 150ms
F: 210ms
B
(SOT-23)
(TSOT-23A)
C
(SOT-23)
(TSOT-23A)
(RESET=Active High)
(RESETB=Active Low)
(PP=Push-pull out)
(OD=Open-Drain output)
A
(SC-70-4)
160:
180:
200:
210:
230:
232:
263:
270:
280:
293:
300:
308:
400:
420:
438:
450:
463:
V
TH
= 1.60V
V
TH
= 1.80V
V
TH
= 2.00V
V
TH
= 2.10V
V
TH
= 2.30V
V
TH
= 2.32V
V
TH
= 2.63V
V
TH
= 2.70V
V
TH
= 2.80V
V
TH
= 2.93V
V
TH
= 3.00V
V
TH
= 3.08V
V
TH
= 4.00V
V
TH
= 4.20V
V
TH
= 4.38V
V
TH
= 4.50V
V
TH
= 4.63V
N/A: SOT-2X
K: 0.9mm max height
(for TSOT-2XA Only)
A
(SOT-25)
(TSOT-25A)
A
(SOT-143)
Rev. A.10
5
FPGA/CPLD
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
