AME
AME8510 / 8520 / 8530
n
General Description
The AME8510/8520/8530 family allows the user to cus-
tomize the CPU monitoring function without any external
components. The user has a large choice of reset volt-
age thresholds and output driver configurations, all of which
are preset at the factory. Each wafer is trimmed to the
customer's specifications.
These circuits will ignore fast negative going transients
on V
IN
. The state of the reset output is guaranteed to be
correct down to 1V.
After V
IN
crosses above a factory preset threshold, the
AME8510/8520/8530 assert a reset signal. After a pre-
determined time (the“reset” interval) the reset is
deasserted. If V
IN
ever drops below the threshold voltage
a reset is asserted immediately. In addition to a supply
monitoring function the AME8510/8520 also monitor tran-
sitions at the watch dog input (WDI). If a logic transition
does not occur at the WDI pin within a certain time inter-
val (the
“watchdog”interval)
then a reset is asserted. The
reset deasserts after the reset interval, as explained ear-
lier.
The AME8510/8530 can both assert a reset manually
by pulling the MRB input to ground.
Space saving SOT-25/TSOT-25 packages and
micropower quiescent current make this family a natural
for portable battery powered equipment.
Micropower
µP
Watch Dog Timer
n
Applications
l
Motherboards
l
Computer peripherals
l
Portable electronics
l
Applications using CPUs
l
Consumer electronics
n
Pin Configuration
SOT-25/TSOT-25
Top View
5
4
AME8510
1. Reset/ResetB
2. GND
AME8510
3. MRB
4. WDI
5. IN
1
2
3
* Die Attach:
Conductive Epoxy
SOT-25/TSOT-25
Top View
5
4
AME8520
1. Reset/ResetB
2. GND
AME8520
3. ResetB/Reset
4. WDI
5. IN
n
Features
l
Small Packages: SOT-25/TSOT-25
l
7 Voltage Threshold Options
l
Tight Voltage Threshold Tolerance ---±1.50%
l
12 Output Driver Configuration Options
l
Wide Temperature Range -------- -40
o
C to +85
o
C
l
Low Quiescent Current < 3.0µA
l
3 Bonding Options
l
All AME’s Lead Free Products Meet RoHS
Standards
1
2
3
1
2
3
* Die Attach:
Conductive Epoxy
SOT-25/TSOT-25
Top View
5
4
AME8530
1. Reset/ResetB
2. GND
AME8530
3. ResetB/Reset/NC
4. MRB
5. IN
* Die Attach:
Conductive Epoxy
Rev.I.09
1
AME
AME8510 / 8520 / 8530
n
Pin Description
Pin Number
Pin Name
AME8510 AME8520 AME8530
This pin may be either RESET or RESETB. RESETB is
active low. In the case of the AME8520 and AME8530 this pin
will always be the opposite polarity from pin 3. This pin can be
push/pull or open drain.
Micropower
µP
Watch Dog Timer
Pin Description
1
1
1
RESET/
RESETB
2
2
2
GND
Ground
N/A
3
3
RESET/
RESETB
This pin may be either RESETB or RESET. RESET is active
high. In the case of the AME8520 and AME8530 this pin will
always be the opposite polarity from pin 1. This pin can be
either push/pull or open drain.
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. If this function is unused then float this pin or tie it to
V
IN
.
3
N/A
4
MRB
4
4
N/A
WDI
Watch Dog Input. Any transition on this pin will reset the
watch dog timer. If this pin remains high or low for longer than
the watch dog interval then a reset is asserted. Float or
tristate this pin to disable the watch dog feature.
Positive power supply. A reset is asserted after this voltage
drops below a predetermined level. After V
IN
rises above that
level reset remains asserted until the end of the reset timeout
period.
5
5
5
IN
2
Rev.I.09
AME
AME8510 / 8520 / 8530
n
Ordering Information
AME8510 x x x x x x x xx x
Special Feature
V
IN
Threshold Voltage (V
TH
)
Watch Dog Interval
Reset Time (T
D2NOM
)
Output Driver Option
Number of Pins
Package Type
Operating Ambient Temperature Range
Pin Configuration
Operating
Ambient
Temperature
Range
Reset
Time
(T
D2NOM
)
Micropower
µP
Watch Dog Timer
Pin
Configuration
Package Number
Type
of
Pins
V: 5
Output Driver
Option
Watch
Dog
Interval
V
IN
Threshold
Voltage (V
TH
)
Special
Feature
A: 1. Reset/
(SOT-25)
ResetB
(TSOT-25)
2. GND
3. MRB
4. WDI
5. IN
E: -40
O
C to +85
O
C E: SOT-2X
A: PIN1_RESETB/PP D: 30ms
B: Pin1_RESETB/OD E: 150ms
C: PIN1_RESET/PP
F: 210ms
D: Pin1_RESET/OD
D: 1000 ms 22: V
TH
=
E: 1761 ms 23: V
TH
=
26: V
TH
=
29: V
TH
=
31: V
TH
=
42: V
TH
=
44: V
TH
=
45: V
TH
=
46: V
TH
=
2.19V L: Low profile
2.32V Y: Lead free &
Low profile
2.63V
Z: Lead free
2.93V
3.08V
4.20V
4.38V
4.50V
4.63V
(RESET = Active High)
(RESETB = Active Low)
(PP = Push pull out)
(OD = Open drain output )
Rev.I.09
3
AME
AME8510 / 8520 / 8530
n
Ordering Information
AME8520 x x x x x x x xx x
Special Feature
V
IN
Threshold Voltage (V
TH
)
Watch Dog Interval
Reset Time (T
D2NOM
)
Output Driver Option
Number of Pins
Package Type
Operating Ambient Temperature Range
Pin Configuration
Operating Ambient
Package Number
Temperature
of
Type
Range
Pins
E: -40
O
C to +85
O
C
E: SOT-2X
V: 5
Reset
Time
(T
D2NOM
)
Watch
Dog
Interval
Micropower
µP
Watch Dog Timer
Pin
Configuration
Output Driver
Option
V
IN
Threshold
Voltage (V
TH
)
Special
Feature
A: 1. Reset/
(SOT-25)
ResetB
(TSOT-25)
2. GND
3. Reset/
ResetB
4. WDI
5. IN
E: PIN1_RESETB/PP D: 30ms
PIN3_RESET/PP E: 150ms
F: PIN1_RESETB/PP F: 210ms
PIN3_RESET/OD
G:PIN1_RESETB/OD
PIN3_RESET/PP
H: PIN1_RESETB/OD
PIN3_RESET/OD
I: PIN1_RESET/PP
PIN3_RESETB/PP
J: PIN1_RESET/PP
PIN3_RESETB/OD
K: PIN1_RESET/OD
PIN3_RESETB/PP
L: PIN1_RESET/OD
PIN3_RESETB/OD
E: 1761 ms 22: V
TH
= 2.19V L: Low profile
23: V
TH
= 2.32V Y: Lead free &
26: V
TH
= 2.63V
Low profile
29: V
TH
= 2.93V Z: Lead free
31: V
TH
= 3.08V
42: V
TH
= 4.20V
44: V
TH
= 4.38V
45: V
TH
= 4.50V
46: V
TH
= 4.63V
(RESET = Active High)
(RESETB = Active Low)
(PP = Push pull out)
(OD = Open drain output )
4
Rev.I.09
嵌入式系统
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