Analog Microelectronics AME8530AEEVLFX46, AME8530AEEVLFX44, AME8530AEEVLFX31, AME8530AEEVLFX29, AME8530AEEVLFX26 Datasheet

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Analog Microelectronics AME8530AEEVLFX46, AME8530AEEVLFX44, AME8530AEEVLFX31, AME8530AEEVLFX29, AME8530AEEVLFX26 Datasheet

AME, Inc.

AME8510 / 8520 / 8530

Micropower μP Watch Dog Timer

n General Description

The AME8510/8520/8530 family allows the user to customize the CPU monitoring function without any external components. The user has a large choice of reset voltage 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 VDD. The state of the reset output is guaranteed to be correct down to 1V.

After VDD crosses above a factory preset threshold, the AME8510/8520/8530 assert a reset signal. After a predetermined time (the “reset” interval) the reset is deasserted. If VDD ever drops below the threshold voltage a reset is asserted immediately. In addition to a supply monitoring function the AME8510/8520 also monitor transitions at the watch dog (WDI) input. If a logic transition does not occur at the WDI pin within a certain time interval (the “watchdog” interval) then a reset is asserted. The reset deasserts after the reset interval, as explained earlier.

n Features

lSmall packages: SOT-23-5

l7 voltage threshold options

lTight voltage threshold tolerance --- ±1.50%

l 12 output driver configuration options

lWide temperature range -------- -45oC to 85oC

lLow temperature coefficient --- 100ppm/oC (max)

lLow quiescent current < 3.0μA

l3 bonding options

n Pin Configuration

The AME8510/8530 can both assert a reset manually

SOT-25 Top View

 

 

by pulling the MRB input to ground.

 

 

 

VD D

W D I

Space saving SOT25 packages and micropower quiescent current make this family a natural for portable battery powered equipment.

AME8511

AME8510

RESET/

RESETB G N D M R B

n Applications

V D D

W D I

 

lMotherboards

lComputer peripherals

lPortable electronics

lApplications using CPUs

lConsumer electronics

AME8511

AME8520

AME8510

RESET/

G N D

RESETB/

R E S E T B

R E S E T

 

V D D M R B

AME851

AME8530

AME8530

RESET/

G N D

RESETB/

R E S E T B

R E S E T

1

AME, Inc.

AME8510 / 8520 / 8530

Micropower μP Watch Dog Timer

n Ordering Information

AME8510AEEV X X X XX

AME8520AEEV X X X XX

AME8530AEEV X X X XX

VDD Threshold Voltage

22:VTH=2.19V

23:VTH=2.32V

26: VTH=2.63V

29: VTH=2.93V

31: VTH=3.08V

44: VTH=4.38V

46: VTH=4.63V

Watch Dog Interval (TWDNOM)

E: TD=1760mS

X: Without WDI option

Reset Time (TD2NOM)

F: TD=210mS

 

 

Output Driver Option

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pin 1

 

Pin 3

 

 

 

 

Polarity

*

Polarity

*

 

 

 

 

 

 

 

 

 

A:

RESETB

PP

N/A

N/A

 

 

B:

RESETB

OD

N/A

N/A

 

 

 

 

 

 

 

 

 

C:

RESET

PP

N/A

N/A

--For example--

 

D:

RESET

OD

N/A

N/A

AME8520AEEVEFE29 means:

 

E:

RESETB

PP

RESET

PP

 

 

 

 

 

 

 

Output at pin 1 is RESETB, push pull

 

F:

RESETB

PP

RESET

OD

Output at pin 3 is RESET, push pull

 

G:

RESETB

OD

RESET

PP

 

 

 

 

 

 

 

Reset time is 210mS

 

H:

RESETB

OD

RESET

OD

Watch dog interval is 1760mS

 

I:

RESET

PP

RESETB

PP

VDD threshold voltage is 2.93V

 

 

 

 

 

 

 

J:

RESET

PP

RESETB

OD

No temperature shutdown

 

K:

RESET

OD

RESETB

PP

 

 

L:

RESET

OD

RESETB

OD

 

 

 

 

 

 

 

VDD

WDI/MRB

AME851

8510/20/30

AME8530

PIN 1 GND PIN 3

*Output Driver Chart Explanation: PP = Push pull output

OD = Open drain output N/A = Not available (8510) RESET = Active high RESETB = Active low

Please consult AME sales office or authorized Rep. for other RESET TIME interval and Watch Dog time interval.

2

AME, Inc.

AME8510 / 8520 / 8530

Micropower μP Watch Dog Timer

 

 

 

 

 

 

 

 

 

 

n Absolute Maximum Ratings

 

 

 

 

 

 

 

 

 

Parameter

Maximum

Unit

 

 

 

 

 

 

 

Supply Voltage

6

V

 

 

 

 

 

 

 

ESD Classification

B

 

 

 

 

 

 

 

Caution: Stress above the listed absolute rating may cause permanent damage to the device

n Recommended Operating Conditions

 

 

 

 

 

 

 

 

 

Parameter

Rating

 

 

 

 

 

 

 

 

Supply Voltage

0.9 - 5 V

 

 

 

 

 

 

 

 

Ambient Temperature Range

- 40 to +85 oC

 

 

 

 

 

 

 

 

Junction Temperature

- 40 to +125 oC

 

 

 

 

 

 

 

n Thermal Information

 

 

 

 

 

 

 

 

Parameter

Maximum

Unit

 

 

 

 

 

 

 

Thermal Resistance (SOT-25)

256

oC /W

 

 

 

 

 

 

 

Maximum Junction Temperature

150

oC

 

 

Maximum Lead Temperature ( 10 Sec)

300

oC

 

 

 

 

 

 

3

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