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AME8500CEFTBA18中文资料

AME8500 / 8501

μProcessor Supervisory

l Small packages: SOT-23, SOT-89l 11 voltage threshold options

l Tight voltage threshold tolerance ---±1.50%l 5 reset interval options l 4 output configuration options

l Wide temperature range -------- -40o C to 85o C l Low temperature coefficient --- 100ppm/o C (max)l Low quiescent current < 3.0μA l Thermal shutdown option (AME8501)

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 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 for supply voltages greater than 1V.

The AME8501 includes all the above functionality plus an overtemperature shutdown function. When the ambi-ent temperature exceeds 80o C a reset is asserted and remains asserted until the temperature falls below 60o C.Space saving SOT23 packages and micropower qui-escent current (<3.0μA) make this family a natural for portable battery powered equipment.

n General Description

n Features

n Typical Operating Circuit

Note: * External pull-up resistor is required if open-drain output is used. 10 k ? is recommended.

n Block Diagram

l Portable electronics l Power supplies

l Computer peripherals l Data acquisition systems l Applications using CPUs l Consumer electronics

n Applications

AME8500 with Push-Pull RESET

V DD

RESET

AME8500 with Push-Pull RESET

μProcessor Supervisory

AME8500 / 8501

n Block Diagram (contd.)

AME8500AEET AME8501AEET 1.GND

2.Reset/ResetB

3.V DD

SOT-23Top View

123

n Pin Configuration

SOT-23Top View

AME8500CEET AME8501CEET 1.Reset/ResetB 2.V DD 3.GND

123

AME8500BEET AME8501BEET 1.Reset/ResetB 2.GND 3.V DD

AME8500 with Open-Drain RESET

V AME8500 with Open-Drain RESET

V DD

AME8500AEET AME8501AEET 1.GND

2.Reset/ResetB

3.V DD

SOT-23-L Top View

AME8500 / 8501

μProcessor Supervisory

n Pin Configuration (contd.)

SOT-89Top View

AME8500AEFT AME8501AEFT 1.GND 2.V DD

3.Reset/ResetB

AME8500CEFT AME8501CEFT 1.V DD 2.GND

3.Reset/ResetB

AME8500BEFT AME8501BEFT 1.Reset/ResetB 2.V DD 3.GND

132

SOT-23-L Top View

AME8500BEET AME8501BEET 1.Reset/ResetB 2.GND 3.

V DD

123

SOT-23-L Top View

AME8500CEET AME8501CEET 1.Reset/ResetB 2.V

DD 3.GND

SOT-25Top View

AME8500BEEV AME8501BEEV 1.Reset/ResetB 2.V DD 3.GND 4.N/C 5.

N/C

μProcessor Supervisory

AME8500 / 8501

n Ordering Information

Operating Temperature Range Number of Pins Package Type

Pin Configuration

Special Feature

AME8501 x x x x x x x x

Output Driver Option Reset Time (T D2NOM )VDD Threshold Voltage (V TH )AME8500 x x x x x x x x A

1. GND E:-40O C to 85O C E:SOT-2X T:3A:RESETB /PP A:1.5 ms 15:VTH= 1.5V L:Low profile (SOT-23)

2. Reset/F:SOT-89V:5

B:RESETB /OD D:30 ms 16:VTH= 1.6V Y: ResetB C:RESET/ PP E:150 ms 18:VTH= 1.8V 3. VDD D:RESET/ OD F:210 ms

19:VTH= 1.9V Z:Lead free B

1. Reset/20:VTH=

2.0V (SOT-23)

ResetB 21:VTH= 2.1V 2. GND 22:VTH= 2.2V 3. VDD 23:VTH= 2.32V C

1. Reset/24:VTH=

2.4V (SOT-23)

ResetB 26:VTH= 2.63V 2. VDD 27:VTH= 2.7V 3. GND 28:VTH= 2.8V A

1. GND 29:VTH=

2.93V (SOT-89)

2. VDD 31:VTH=

3.08V 3. Reset/40:VTH=

4.0V ResetB 42:VTH= 4.2V B

1. Reset/44:VTH= 4.38V (SOT-89)

ResetB 46:VTH= 4.63V

2. VDD

3. GND C

1. VDD (SOT-89)

2. GND

3. Reset/ ResetB

Lead free &Low profile Output Driver

Option

Characteristic

of RESET or

RESETB pin

Special Feature

Reset Time (T D2NOM )

VDD Threshold Voltage (V TH )

Package

Type

Number of Pins Operating Temperature

Range

Configuration (PP = Push pull out)(RESET = Active High)(RESETB = Active Low)(OD = Open drain output polarity )

AME8500 / 8501μProcessor Supervisory n Ordering Information

6μProcessor Supervisory

AME8500 / 8501

n Ordering Information (contd.)

AME8500 / 8501μProcessor Supervisory n Ordering Information (contd.)

Please consult AME sales office or authorized Rep./Distributor for other voltage options.

μProcessor Supervisory

AME8500 / 8501

n Absolute Maximum Ratings

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

AME8500 / 8501μProcessor Supervisory

10μProcessor Supervisory

AME8500 / 8501

n Timing Diagram

n Applications Information

Supply Transients

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.

Glitch Rejection Reset Time vs. Temperature

(

)

Glitch Amplitude (V)

100

120

140

0.010.11

(

)

190

195

200

205

210

215

220

-45-5255585115

Temperature (o C)

AME8500 / 8501

μProcessor Supervisory

I DD vs. V DD

Threshold Hysteresis vs. Temperature

T D1 Delay vs. Temperature

I DD vs. Temperature

Reset V TH vs. Temperature

Reset VOL vs. Temperature

S u p p l y C u r r e n t @ 5V (u A )

Temperature (o C)2.10

2.15

2.20

2.252.30

2.35

-45

-5

115

2.630

2.632

2.6342.6362.6382.6402.6422.644

2.6462.648

2.650-45

-5

115

R e s e t V t h (V )

Temperature (o

I D D (u A )

V DD (V)

0.4

0.8

1.2

1.6

012345

D 2 D e l a y (u S )

Temperature (o C)

3738

43-40

-20020406080100

H y s t e r e

s i s (% o f V T H )

Temperature (o C)00.1

0.2

0.3

0.4

0.5

-40

-20020406080100

0.220

0.225

0.2300.2350.2400.2450.2500.2550.260

0.265-45

-5255585115

e s e t V O L @ 0.8m A (V )

Temperature (o C)

μProcessor Supervisory

AME8500 / 8501

n Package Dimension

SOT-23

c 1

Top View

Side View

SOT-23-L

c 1

Top View

Side View

AME8500 / 8501

μProcessor Supervisory

n Package Dimension

SOT-89

Top View Side View

SOT-25

Top View

Side View

Front View