APE6809U-C [A-POWER]

3PIN MICROPROCESSOR RESET CIRCUIT; 3PIN微处理器复位电路


型号：	APE6809U-C
厂家：	ADVANCED POWER ELECTRONICS CORP.
描述：	3PIN MICROPROCESSOR RESET CIRCUIT 3PIN微处理器复位电路微处理器复位电路
文件：	总9页 (文件大小：171K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Advanced Power

Electronics Corp.

APE6809_6812

3PIN MICROPROCESSOR RESET CIRCUIT

FEATURES

DESCRIPTION

The APE6809_6812 are used for microprocessor (µP)

supervisory circuits to monitor the power supplies in µP and

digital systems. They provide excellent circuit reliability and

low cost by eliminating external components and

Precision Monitoring of +2.5, +3V, +3.3V,

and +5V Power-Supply Voltages

Fully Specified Over Temperature

Available in Three Output Configurations

adjustments when used with +5V, +3.3V, +3.0V, +2.5V

Push-Pull

Low Output(APE6809/APE6811)

powered circuits.

RESET

These circuits perform a single function: they assert a reset

signal whenever the VCC supply voltage declines below a

preset threshold, keeping it asserted for at least 200ms after

VCC has risen above the reset threshold. Reset thresholds

suitable for operation with a variety of supply voltages are

available. The APE6809_6812 have push pull outputs. The

APE6809/APE6811 have an active low RESET output, while

the APE6810_6812 has an active high RESET output. The

reset comparator is designed to ignore fast transients on

VCC, and the outputs are guaranteed to be in the correct

logic state for VCC down to 1.0V. Low supply current makes

the APE6809_6812 ideal for use in portable equipment. The

APE6809_6812 is available in a 3-pin SOT-23 and SC-70

package.

Push-Pull RESET High Output(APE6810/APE6812)

200ms (Typ.)min Power-On Reset Pulse Width

25µA Supply Current

Guaranteed Reset Valid to VCC = +1.0V

Power Supply Transient Immunity

No External Components

Available in the 3-Pin Pb-Free SOT-23

and SC-70 Package

TYPICAL APPLICATION

VCC

Microprocessor

APE68XX

RESET

(RESET)

RESET

INPUT

GND

PACKAGE / ORDERING INFORMATION

APE68XX X - X

(Top View)

RESET

GND

Enable

Package

Voltage

(RESET)

U : SC-70

N : SOT-23

APE6811

APE6812

09 : Active-Low

10 : Active-High

11 : Active-Low

12 : Active-High

A: 4.63

B: 4.38

C: 4.00

D: 3.08

E: 2.93

F: 2.63

G: 2.25

H: 2.70

I : 4.25

APE6809

APE6810

V_CC

RESET

GND

(RESET)

SOT-23/SC-70

Data and specifications subject to change without notice

201102212

Advanced Power

Electronics Corp.

APE6809_6812

ABSOLUTE MAXIMUM RATINGS (at T_A=25°C)

VCC PIN Voltage (V_CC) ----------------------------------- GND - 0.3V to GND + 6.5V

RESET, RESET(Push-Pull) PIN Voltage (V_RESET) -- GND - 0.3V to VCC + 0.3V

Input Current, V_CC(I_CC) ------------------------------------ 20mA

Output Current, RESET, RESET (I_O) ------------------ 5mA

Power Dissipation(P_D) ------------------------------------- ( TJ-TA ) / Rthja

Storage Temperature Range(T_ST) ---------------------- -60°C To 150°C

Operating Temperature Range(T_OP) ------------------- -40°C To 85°C

Junction Temperature(T_J) -------------------------------- -40°C To 150°C

110^oC/W

Thermal Resistance from Junction to case(Rth_JC)

Note

250^oC/W

Thermal Resistance from Junction to Ambient(Rth_JA

)

Note. Rth_JAis measured with the PCB copper area of approximately 1 in²(Multi-layer). that need connect to GND pin.

ELECTRICAL SPECIFICATIONS

(V_DD=2.75V, T_A=25℃, unless otherwise specified)

UNITS

Parameter

Operating Vcc Range

SYM

V_Range

TEST CONDITION

V_CC= V_TH+1.0V

MIN

TYP MAX

Supply Current

I_CC

V_TH

V_THT

μA

APE6809_6812A

4.54

4.29

4.16

3.92

3.02

2.87

2.64

2.57

2.2

4.63 4.71

4.38 4.46

4.25 4.33

APE6809_6812B

APE6809_6812I

APE6809_6812C

4.08

Reset Threshold T_A=25^oC

APE6809_6812D

3.08 3.15

APE6809_6812E

2.93

2.7

APE6809_6812H

2.75

APE6809_6812F

2.63 2.69

APE6809_6812G

T_A= 0^oC to +85^oC

2.25

2.3

Reset Threshold Tempco

Set-up Time

ppm/^oC

μs

T_S

T_RD

V_CC= 0 to (V_TH– 100mV)

Vcc=V_THto (V_TH-100mV)

T_A= 0^oC to +85^oC

Vcc to Reset Delay

Reset Active Timeout Period

RESET

μs

T_DELAY

160

200

260

1.8V<V_CC< V_TH(min), I_SINK= 1.2mA

1.2V < V_CC< 1.8V, I_SINK= 50uA

V_CC> V_{TH (max)}, I_SOURCE= 500uA,

V_CC> V_{TH (max)}, I_SINK= 1.2mA,

1.8V < V_CC< V_{TH (min)}, I_SOURCE= 500uA

1.2V < V_CC< 1.8V, I_SOURCE= 150uA

Input voltage

V_OL

0.3

Output Voltage

(APE6809/APE6811)

RESET

V_OH

V_OL

0.8 V_CC

0.3

Output Voltage

V_OH

V_Hys

0.8 V_CC

(APE6810/APE6812)

Hysteresis at V_CC

Advanced Power

Electronics Corp.

APE6809_6812

PIN DESCRIPTIONS

PIN SYMBOL

VCC

PIN DESCRIPTION

Operating voltage input

Ground

GND

Reset output pin

RESET/(RESET)

L: for APE6809/APE6811

H: for APE6810/APE6812

BLOCK DIAGRAM

VCC

P-MOS

N-MOS

Delay

Circuit

RESET

/ RESET

VREF

GND

FUNCTION DESCRIPTION

A microprocessor’s (µP’s) reset input starts the µP in a known state. The

APE6809_6812 asserts reset to prevent code-execution errors during power-up,

power-down, or brownout conditions. They assert a reset signal whenever the VCC

supply voltage declines below a preset threshold, keeping it asserted for at least

200ms after VCC has risen above the reset threshold. The APE6809_6812 has a

push-pull output stage.

APPLICATION INFORMATION

Negative-Going VCC Transients

In addition to issuing a reset to the µP during power-up, power-down, and

brownout conditions, the APE6809_6812 is relatively immune to short-duration

negative-going VCC transients (glitches).

The APE6809_6812 does not generate a reset pulse. The graph was generated

using a negative going pulse applied to VCC, starting 0.5V above the actual reset

threshold and ending below it by the magnitude indicated (reset comparator overdrive).

The graph indicates the maximum pulse width a negative going VCC transient can

have without causing a reset pulse. As the magnitude of the transient increases (goes

farther below the reset threshold), the maximum allowable pulse width decreases.

Typically, a VCC transient that goes 50mV below the reset threshold A 0.1µF bypass

capacitor mounted as close as possible to the VCC pin provides additional transient

immunity.

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APE6809_6812

APPLICATION INFORMATION

Ensuring a Valid Reset Output Down to VCC = 0

RESET is guaranteed to be a logic low for VCC > 1.0V. Once VCC exceeds the

reset threshold, an internal timer keeps RESET low for the reset timeout period; after

this interval, RESET goes high. If a brownout condition occurs (VCC dips below the

reset threshold), RESET goes low. Any time VCC goes below the reset threshold, the

internal timer resets to zero, and RESET goes low. The internal timer starts after VCC

returns above the reset threshold, and RESET remains low for the reset timeout

period.

When VCC falls below 1.0V, the APE6809/APE6811 RESET output no longer sinks

current—it becomes an open circuit. Therefore, high-impedance CMOS logic inputs

connected to RESET can drift to undetermined voltages.

This presents no problem in most applications since most µP and other circuitry is

inoperative with VCC below 1.0V. However, in applications where RESET must be

valid down to 0V, adding a pull down resistor to causes any stray leakage currents to

flow to ground, holding RESET low. R1’s value is not critical; 100k is large enough not

to load RESET and small enough to pull RESET to ground. For the

APE6810/APE6812 if RESET is required to remain valid for VCC < 1.0V.

Ensuring a Valid Reset Output Down to VCC = 0

Most µP supervisor ICs has reset threshold voltages between 5% and 10%

below the value of nominal supply voltages. This ensures a reset will not occur within

5% of the nominal supply, but will occur when the supply is 10% below nominal. When

using ICs rated at only the nominal supply ±5%, this leaves a zone of uncertainty

where the supply is between 5% and 10% low, and where the reset may or may not be

asserted.

Advanced Power

Electronics Corp.

APE6809_6812

TYPICAL PERFORMANCE CHARACTERISTICS

Temperature Vs Threshold Voltage

Temperature Vs Reset Active Timeout Period

2.96

2.95

2.94

2.93

2.92

2.91

2.9

250

240

230

220

210

200

190

180

170

160

150

V_TH=2.93V

-50

-25

100

-50

-25

100

Temperature (℃)

Threshold Voltage Vs Supply Current

Temperature Vs Supply Current

V_TH=2.93V

V_CC=V_TH+1V

-50

-25

100

2.25

2.63

2.93

3.08

4.38

4.63

Temperature (℃)

Threshold Voltage (V)

Temperature Vs Power-Down Reset Delay

V_TH=2.25V

_OD=V_TH-V_CC

V_TH=2.93V

_OD=V_TH-V_CC

V_OD=50mV

V_OD=100mV

V_OD=200mV

V_OD=100mV

V_OD=200mV

-50

-25

100

-50

-25

100

Temperature (℃)

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Electronics Corp.

APE6809_6812

TYPICAL PERFORMANCE CHARACTERISTICS

Temperature Vs Power-Down Reset Delay

100

V_TH=4.63V

_OD=V_TH-V_CC

V_OD=100mV

V_OD=50mV

V_OD=200mV

-50

-25

100

Temperature (℃)

TIMING DIAGRAM

Giltch Immunity

3500

3000

2500

2000

1500

1000

500

3000

900

270

140

100 200 300 400 500 600 700 800 900 1000 1100

RESET COMPARATOR OVERDRIVE(mV)

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Electronics Corp.

APE6809_6812

MARKING INFORMATION

SOT-23

APPENDIX-1

Identification

Code

Part Number

Code

Part Number

APE6811N-A

APE6811N-B

APE6811N-C

APE6811N-D

APE6811N-E

APE6811N-F

APE6811N-G

APE6811N-H

APE6811N-I

APE6809N-A

Part Number : && (see Appendix-1)

Week:

A~Z : 01~26

a~z : 27~52

ID Code : Internal

APE6809N-B

APE6809N-C

APE6809N-D

APE6809N-E

APE6809N-F

APE6809N-G

APE6809N-H

APE6809N-I

&&YWS

Year :

A = 2010

APE6810N-A

APE6810N-B

APE6810N-C

APE6810N-D

APE6810N-E

APE6810N-F

APE6810N-G

APE6810N-H

APE6810N-I

APE6812N-A

APE6812N-B

APE6812N-C

APE6812N-D

APE6812N-E

APE6812N-F

APE6812N-G

APE6812N-H

APE6812N-I

1 = 2011

：

SC-70

APPENDIX-2

Identification

Code

Identification

Code

Part Number

APE6811U-A

APE6811U-B

APE6811U-C

APE6811U-D

APE6811U-E

APE6811U-F

APE6811U-G

APE6811U-H

APE6811U-I

APE6809U-A

Part Number : & (see Appendix-2)

APE6809U-B

APE6809U-C

APE6809U-D

APE6809U-E

APE6809U-F

APE6809U-G

APE6809U-H

APE6809U-I

APE6810U-A

APE6810U-B

APE6810U-C

APE6810U-D

APE6810U-E

APE6810U-F

APE6810U-G

APE6810U-H

APE6810U-I

Week:

A~Z : 01~26

a~z : 27~52

&YW

Year :

A = 2010

1 = 2011

：

APE6812U-A

APE6812U-B

APE6812U-C

APE6812U-D

APE6812U-E

APE6812U-F

APE6812U-G

APE6812U-H

APE6812U-I

：

Advanced Power

Electronics Corp.

APE6809_6812

PACKAGE OUTLINES

SOT-23-3L

GAUGE PLANE

VIEW C

SEE VIEW C

Dimensions in Millimeters

Dimensions in Inches

Symbol

Min.

1.05

0.05

0.90

0.30

0.08

2.70

2.60

1.40

0.30

0.50

1.80

0.85

0^o

Nom.

Max.

1.45

0.15

1.30

0.50

0.20

3.10

3.00

1.80

0.60

0.70

2.00

1.15

10^o

Min.

Nom.

Max.

0.041

0.002

0.035

0.012

0.003

0.106

0.102

0.055

0.012

0.020

0.071

0.033

0^o

0.057

0.006

0.051

0.020

0.008

0.122

0.118

0.071

0.024

0.028

0.079

0.045

10^o

1.10

0.043

2.90

2.80

1.60

0.60

1.90

1.00

5^o

0.114

0.110

0.063

0.024

0.075

0.039

5^o

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SC-70-3L

APE6809_6812

Dimensions in Millimeters

Dimensions in Inches

Symbol

Min.

0.80

0.00

0.70

0.25

0.08

1.80

1.95

1.15

Nom.

Max.

1.10

0.10

1.00

0.40

0.22

2.20

2.25

1.35

Min.

0.031

0.000

0.280

0.010

0.003

0.071

0.077

0.045

Nom.

Max.

0.043

0.004

0.039

0.016

0.009

0.087

0.089

0.053

0.90

2.00

2.10

1.25

1.30

0.36

0.15

0.035

0.079

0.083

0.049

0.051

0.014

0.006

0.26

0.46

0.10

8º

0.010

0.018

0.004

8º

0º

4º

12º

4º

12º

APE6809U-C [A-POWER]

相关型号：

APE6809U-D

APE6809U-E

APE6809U-F

APE6809U-G

APE6809U-H

APE6809U-I

APE6809U-I-HF

APE6810N-A

APE6810N-A-HF

APE6810N-B

APE6810N-B-HF

APE6810N-C