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

Analog Microelectronics, Inc.

1

AME8500 / 8501

Micropower

µµ

µµ

µP Reset Family

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n Features

l Small packages: SOT-23, SOT-89
l 1 1 voltage threshold options
l Tight voltage threshold tolerance ---±1.50%
l 4 reset interval options
l 4 output configuration options
l Wide temperature range -------- -40

o

C to 85oC

l Low temperature coefficient --- 100ppm/

o

C (max)

l Low quiescent current < 3.0µA
l Thermal shutdown option (AME8501)

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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, 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 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.

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n Applications

l Portable electronics
l Power supplies
l Computer peripherals
l Data acquisition systems
l Applications using CPUs
l Consumer electronics

Analog Microelectronics, Inc.

2

AME8500 / 8501

Micropower

µµ

µµ

µP Reset Family

nn

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n Pin Configuration

AME8500AEET
AME8501AEET

1: GND
2: Reset/ResetB
3: V

DD

3

1

2

AME8500BEET
AME8501BEET

1: Reset/ResetB
2: GND
3: V

DD

3

1

2

AME8500AEFT
AME8501AEFT

1: GND
2: V

DD

3: Reset/ResetB

3

2

1

AME8500BEFT
AME8501BEFT

1: Reset/ResetB
2: V

DD

3: GND

3

2

1

3

1

2

AME8500CEET
AME8501CEET

1: Reset/ResetB
2: V

DD

3: GND

3

2

1

1: V

DD

2: GND
3: Reset/ResetB

AME8500CEFT
AME8501CEFT

Analog Microelectronics, Inc.

3

AME8500 / 8501

Micropower

µµ

µµ

µP Reset Family

Note: AME8500 without over-temperature thermal shutdown function.

AME8501 with over-temperature thermal shutdown function.

n

Ordering I nformat ion

AM E8500xEET X X XX ( SOT- 23)
AM E8501xEET X X XX ( SOT- 23)
AM E8500xEFT X X XX ( SOT-89)
AM E8501xEFT X X XX ( SOT-89)

VDD Threshold Vol ta ge (VTH)

21: VTH=2.1V
24: V

TH

=2.4V

26: V

TH

=2.63V

27: V

TH

=2.7V

28: V

TH

=2.8V

29: V

TH

=2.93V

31: V

TH

=3.08V

40: V

TH

=4.0V

42: V

TH

=4.20V

44: V

TH

=4.38V

46: V

TH

=4.63V

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

Re set T im e (T D

2NOM

)

A: TD=1.5mS
D: T

D

=30mS

E: T

D

=150mS

F: T

D

=210mS

Output Driver Option

--For example-- *
AME8500AEE TAF27 means: A: PP
Output is RESETB, push pull B: OD * Output Driver Chart Explanation:
Reset tim e is 210mS C: PP PP = Push pull output
V

DD

threshold voltage is 2.7V D: OD OD = Open drain out put

No temperature shutdown Polarity

RESET = Active high

RESETB

RESET

RESET

characteristic of

RESET or RESETB pin

Polarity

RESETB

Analog Microelectronics, Inc.

4

AME8500 / 8501

Micropower

µµ

µµ

µP Reset Family

nn

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n Absolute Maximum Ratings

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n Recommended Operating Conditions

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n Thermal Information

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

Ambient Temperature Range
Junction Temperature

Suppl y Voltage

Parameter

-40 to +85 oC

-40 to + 125 oC

Storage T em per at ure

-65 to 150 OC

Rating

1.6 - 5 V

Maximum Unit

7V

B
20 mA
20 mA

100 V/µs

Parameter

Supply Vol tage
ESD Classification

Rate of Rise, V

DD

Output Current, RESET, ResetB

I n put Current, V

DD

Maximum Unit

325
180
350
650
150

o

C

300

o

C

Parameter

Maximu m Lead T em per at ure ( 10 Sec)

Maximu m Junct ion Temper at ure

o

C / W

mW

Thermal Resistance (SOT-89)
Power Dissipation (SOT-23)
Power Dissipation (SOT-89)

Thermal Resistance (SOT-23)

Analog Microelectronics, Inc.

5

AME8500 / 8501

Micropower

µµ

µµ

µP Reset Family

n

n n

n

Electrical Specifications

T

A

=

25oC unless otherwise noted

PARAMETER SYMBOL MIN TYP MAX UNITS

15.5

15.5

3.0

µ

A

5.0

V

THNOM

-

1.5% V

THNOM

+

1.5%

V

THNOM

-

2.0% V

THNOM

+

2.0%

Hysteresis Range V

HYST

20 mV

RESET Threshold Tem p co 30 pp m

RESETB Output Voltage Low V

DD

<Vth min

RESET Output Voltage Low V

DD

>Vth max

RESETB Output Voltage High V

DD

>Vth max

RESET Output Voltage High V

DD

<Vth min

V

DD

to Reset Delay T

D1

40 200

µ

S

Version A 0.5 1.5 5 mS

Version D 15 30 50 mS

Version E 80 150 230 m S

Version F 140 210 500 m S

Temperature Shutdown T

OFF

80

o

C

Temperature Shutdown Hysteresis T

HYS

20

o

C

Note1: The data based on V

TH

=2.7V part type.

0.8V

DD

V

0.5 V

mVV

TH

V

RANG E

V

I

DD

VDD= VTH - 100mV, TA= -40 ~ 85OC

V

DD

Range*

Supply Current

Rese t Threshold

V

OL

V

OH

I

SINK

=1.2mA,

TA= -40~85

O

C

I

SOURCE

=0.5mA,

TA= -40~85

O

C

V

Release

- VTH, note1

TEST CONDITIONS

TA=-40~85OC

V

DD

=

3.0V

V

DD

=

3.0V, TA=-40~85OC

T A=-4 0 ~85

O

C

Reset T imeout Period* T

D2

T A = -40 ~ 85OC

AME8501 only

AME8501 only

Analog Microelectronics, Inc.

6

AME8500 / 8501

Micropower

µµ

µµ

µP Reset Family

nnnn

A ME8500/ 01 pin descript ion

V

DD

GND

Positive power supply. A reset is asserted
after thi s volt age drops below a

predetermined level. After V

DD

rises above

that level the reset output remains as serted
until t he end of the reset tim eout peri od.

Ground

DescriptionName

RESETB/

RESET

This pin can be ordered as RESET or
RESETB. RESET is active high. RESETB
is act ive low. It i s also avai l abl e with an
open drain or pushpull out put.

Analog Microelectronics, Inc.

7

AME8500 / 8501

Micropower

µµ

µµ

µP Reset Family

nn

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n Timing Diagram

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n Applications information

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.

Supply Transients

0

20

40

60

80

100

120

140

0.01 0.1 1

Glitch Rejection

Glitch Duration (

µ

µµ

µ

S)

Glitch Amplitude (V)

V

DD

T

D2

V

TH

RESETB

V

TH

T

D1

T

D2

T

D1

RESET

50%

50%

50%

50%

Analog Microelectronics, Inc.

8

AME8500 / 8501

Micropower

µµ

µµ

µP Reset Family

0

0.4

0.8

1.2

1.6

2

012345

IDD vs. V

DD

I

DD

(

µ

µµ

µ

A)

VDD (V)

85OC

-40OC

0OC

37

38

39

40

41

42

43

-40-200 20406080100

TD1 Delay vs. Temperature

TD2 Delay (

µ

µµ

µ

S)

Temperature (OC)

0

0.1

0.2

0.3

0.4

0.5

-40 -20 0 20 40 60 80 100

Threshold Hysteresis vs.

Temperature

Hysteresis (% of V

TH

)

Temperature (OC)

190

195

200

205

210

215

220

-45-5255585115

Temperature (0C)

Reset Time (mS)

Reset Time vs. Temperature

AME8500AEETAF26

2.630

2.632

2.634

2.636

2.638

2.640

2.642

2.644

2.646

2.648

2.650

-45 -5 25 55 85 115

Temperature (0C)

Reset Vth (V)

Reset Vth vs. Temperature

AME8500AEETAF26

2.10

2.15

2.20

2.25

2.30

2.35

-45 -5 25 55 85 115

Temperature (0C)

Supply Current @ 5V (uA)

IDD vs. Temperatrue

AME8500AEETAF26

Analog Microelectronics, Inc.

9

AME8500 / 8501

Micropower

µµ

µµ

µP Reset Family

0.220

0.225

0.230

0.235

0.240

0.245

0.250

0.255

0.260

0.265

-45 -5 25 55 85 115

Temperature (0C)

Reset VOL @ 0.8mA (V)

Reset VOL vs. Temperature

AME8500AEETAF26

Analog Microelectronics, Inc.

10

AME8500 / 8501

Micropower

µµ

µµ

µP Reset Family

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n Package Dimension

SOT-23

SOT-89

MIN MAX MIN MAX

A 1.40 1.60 0.0551 0.0630

A

1

0.89 - 0.0350 -

b 0.36 0.52 0.0142 0.0205

b

1

0.41 0.56 0.0161 0.0220
C 0.35 0.44 0.0138 0.0173
D 4.40 4.60 0.1732 0.1811

D

1

1.35 1.83 0.0531 0.0720

HE - 4.25 - 0.1673

E 2.29 2.60 0.0902 0.1024
e 2. 90 3.10 0.1142 0.1220
H 0.35 0.70 0.0138 0.0276

S1 1.40 1.60

0.0551 0.0630

SYMBOLS

MILLIMETERS INCHES

MIN MAX MIN MAX

A 1 .00 1.40 0.0394 0.0551

A

1

0.00 0.15 0.0000 0.0059

A

2

0.70 1.25 0.0276 0.0492
b 0.35 0.50 0.0138 0.0197
C 0 .09 0.25 0.0035 0.0098
D 2 .70 3.10 0.1063 0.1220
E 1.40 1 .80 0.0551 0.0709
e
H 2 .60 3.00 0.1024 0.1181
L 0.35 0.55 0.0138 0.0197

θ1

θ1θ1

θ1 0

o

9

o

0

o

9

o

1.90 BSC 0.0748 BSC

SYMBOLS

MILLIMETERS INCHES

Life Support Policy:

These products of Analog Microelectronics, Inc. are not authorized for use as critical components in life-

support devices or systems, without the express written approval of the president

of Analog Microelectronics, Inc.

Analog Microelectronics, 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.

 Analog Microelectronics, Inc. , December 2001

Document: 2007-DS8500/8501-F

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