Analog Microelectronics AME8501CEFTDF46, AME8501CEFTDF44, AME8501CEFTDF42, AME8501CEFTDE40, AME8501CEFTDE31 Datasheet

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Analog Microelectronics, Inc.

AME8500 / 8501

Micropower μP Reset Family

n General Description

The AME8500 family allows the user to customize the CPU reset function without any external components. The user has a large choice of reset voltage thresholds, reset time intervals, and output driver configurations, all of which are preset at the factory. Each wafer is trimmed to the customer's specifications.

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 for supply voltages greater than 1V.

The AME8501 includes all the above functionality plus an overtemperature shutdown function. When the ambient temperature exceeds 800C a reset is asserted and remains asserted until the temperature falls below 600C.

Space saving SOT23 packages and micropower quiescent current (<3.0μA) make this family a natural for portable battery powered equipment.

n Features

lSmall packages: SOT-23, SOT-89

l11 voltage threshold options

lTight voltage threshold tolerance ---±1.50%

l4 reset interval options

l4 output configuration options

lWide temperature range -------- -40oC to 85oC

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

lLow quiescent current < 3.0μA

lThermal shutdown option (AME8501)

n Applications

lPortable electronics

lPower supplies

lComputer peripherals

lData acquisition systems

lApplications using CPUs

lConsumer electronics

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Analog Microelectronics AME8501CEFTDF46, AME8501CEFTDF44, AME8501CEFTDF42, AME8501CEFTDE40, AME8501CEFTDE31 Datasheet

Analog Microelectronics, Inc.

AME8500 / 8501

 

Micropower μP Reset Family

 

 

 

 

 

 

n Pin Configuration

 

 

AME8500AEET

AME8500BEET

AME8500CEET

AME8501AEET

AME8501BEET

AME8501CEET

3

3

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

2

 

 

1

2

 

 

1

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1: GND

 

 

 

 

1: Reset/ResetB

1: Reset/ResetB

 

 

 

 

2: GND

 

 

 

2: VDD

 

 

 

2: Reset/ResetB

 

 

 

 

 

 

 

3: VDD

 

 

 

 

3: VDD

 

 

 

3: GND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AME8500AEFT

AME8500BEFT

AME8500CEFT

AME8501AEFT

AME8501BEFT

AME8501CEFT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

2

3

1

2

3

1

2

3

1: GND

 

 

1: Reset/ResetB

1: VDD

 

 

2: VDD

 

 

2: VDD

 

 

2: GND

 

3: Reset/ResetB

3: GND

 

3: Reset/ResetB

2

Analog Microelectronics, Inc.

AME8500 / 8501 Micropower μP Reset Family

n Ordering Information

AME8500xEET

X X XX

( SOT-23)

AME8501xEET

X X XX

( SOT-23)

AME8500xEFT

X X XX

( SOT-89)

AME8501xEFT

X X XX

( SOT-89)

VDD Threshold Voltage (VTH)

21: VTH=2.1V

24: VTH=2.4V

26:VTH=2.63V

27:VTH=2.7V

28:VTH=2.8V

29:VTH=2.93V

31: VTH=3.08V

40: VTH=4.0V

42: VTH=4.20V

44: VTH=4.38V

46: VTH=4.63V

note: Please contact AME sales dept. for other voltage options.

Reset Time (TD2NOM)

A:TD=1.5mS

D:TD=30mS

E:TD=150mS

F:TD=210mS

Output Driver Option

 

 

characteristic of

 

 

 

RESET or RESETB pin

 

 

 

 

 

 

--For example--

 

Polarity

*

 

 

 

 

 

 

AME8500AEETAF27 means:

A:

RESETB

PP

 

Output is RESETB, push pull

B:

RESETB

OD

* Output Driver Chart Explanation:

 

 

 

 

 

Reset time is 210mS

C:

RESET

PP

PP = Push pull output

VDD threshold voltage is 2.7V

D:

RESET

OD

OD = Open drain output

No temperature shutdow n

 

 

 

Polarity

 

 

 

 

RESET = Active high

Note: AME8500 without over-temperature thermal shutdown function.

AME8501 with over-temperature thermal shutdown function.

3

Analog Microelectronics, Inc.

AME8500 / 8501

Micropower μP Reset Family

 

 

 

 

 

 

 

 

 

 

n Absolute Maximum Ratings

 

 

 

 

 

 

 

 

Parameter

Maximum

Unit

 

 

 

 

 

 

 

Supply Voltage

7

V

 

 

 

 

 

 

 

ESD Classification

B

 

 

 

 

 

 

 

 

Input Current, VDD

20

mA

 

 

 

 

 

 

 

Output Current, RESET, ResetB

20

mA

 

 

 

 

 

 

 

Rate of Rise, VDD

100

V/μs

 

 

 

 

 

 

n Recommended Operating Conditions

 

 

 

 

 

 

 

 

 

Parameter

Rating

 

 

 

 

 

 

 

 

Supply Voltage

1.6 - 5 V

 

 

 

 

 

 

 

 

Ambient Temperature Range

-40 to +85 oC

 

 

 

 

 

 

 

 

Junction Temperature

-40 to +125 oC

 

 

 

 

 

 

 

 

Storage Temperature

-65 to 150 OC

 

 

 

 

 

 

 

n Thermal Information

 

 

 

 

 

 

 

 

Parameter

Maximum

Unit

 

 

 

 

 

 

 

Thermal Resistance (SOT-23)

325

oC /W

 

 

 

 

 

 

Thermal Resistance (SOT-89)

180

 

 

 

 

 

 

 

 

 

 

Power Dissipation (SOT-23)

350

mW

 

 

 

 

 

 

Power Dissipation (SOT-89)

650

 

 

 

 

 

 

 

 

 

 

Maximum Junction Temperature

150

oC

 

 

Maximum Lead Temperature ( 10 Sec)

300

oC

 

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

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