ANPEC APR3101, APR3102, APR3103 Service Manual

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APR3101/2/3

MicroPower Microprocessor Reset Circuit with Manual Reset

Features General Description

••

• 1.2V to 6V Input Voltage Range

••

• Low Quiescent Current : less Than 1.5 µA

••

• High accuracy detection threshold : ±1.5%

••

• Fixed trimmed reset thresholds for 1.5V, 1.75V,

••

2.32V, 2.63V, 2.93V, 3.08V, 3.9V, 4.38V.

••

• Manual Reset Input

••

• Reset Timeout Period 250ms

••

• Available output configurations

••

- Open-drain output

- CMOS active high output

- CMOS active low output

••

• SOT-23-5 package

••

• No external components

••

The APR3101/2/3 are designed to monitor voltage supplies in µP and digital systems. The quiescent current is extremely low, typically 1.5 µA, making it ideal for portable battery operated equipment. The APR3101/2/3 operate by monitoring the system power supply voltage. When the input voltage drops below a fixed threshold or whenever manual reset is asserted, the device asserts a reset signal for a fixed time period after Vcc rises above the fixed threshold or manual reset is deasserted. The APR3101/2/3 series is available with three output stage versions:APR3101 pushpull active low output, APR3102 push-pull active high

Applications

• Computers

• Cell Phones

• Portable Electronics

• µP Power Supply Monitoring

output and APR3103 open drain active low output. The APR3101/2/3 also have a debounced manual reset input that is provided to override the reset monitor. They are also designed to reject fast line transient glitches on Vcc. The APR3101/2/3 are come in a miniature SOT-23-5 package.

Pin Configuration

MRV

CC

45

123

NCGND

SOT-23-5 (T op View)

Reset Reset

(3101/3) (3102)

ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders.

Copyright  ANPEC Electronics Corp. Rev. A.3 - Feb., 2004

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APR3101/2/3

Ordering and Marking Information

APR3101/2/3 -

APR3101/2/3 B :

A1/2/3

X X

Date Code

Voltage Code

Lead Free Code Handling Code Temp. Range Package Code Voltage Code

°

A:1.5V B:1.75V C:2.32V D:2.63V E:2.93V F:3.08V G:3.9V H:4.38V

Package Code B : SOT-23-5 Temp. Range

I : -40 to 85 C

Handling Code

TR : Tape & Reel

Voltage Code :

15 : 1.5V ~ 50 : 5.0V Lead Free Code L : Lead Free Device Blank : Original Device

°

Absolute Maximum Ratings

Symbol Parameter Value Unit

VCC V

V

RESET

ICC, IMR Maximum Continuous Input Current 20 mA

I

RESET/RESET Current 20 mA

RESET

dVcc/dt Rate of Rise of VCC 100

TJ Junction Temperature Range -40 to 150 °C TL Lead Temperature (Soldering, 10 second) 260 °C

R

Thermal Resistance – Junction to Ambient 357 °C/W

TH,JA

PD Power Dissipation Internally Limited W

TSTG Storage Temperature Range -65 to +150

to GND -0.3 to 6 V

CC

RESET to GND (Push-Pull Output) -0.3 to VCC +0.3 RESET to GND (Open Drain Output) -0.3 to 6

V

V/µs

°

C

Pin Function Descrpition

No. Name

1 GND Ground connection 2 NC No internal connection

(APR3101/3)

3

RESET

(APR3102)

RESET output remains low while VCC is below the reset threshold and remains so for a fixed time period after V

RESET output remains high while V so for a fixed time period after V

Manual Reset active low input. A logic low signal on MR asserts a reset

4 MR

condition. Asserted r eset continues as long as MR is low and for a fixed tim e period after MR returns high.

5 VCC Supply Voltage (+1.2V to +6V)

Note: The pin sequence here might not be correct for all different package types, and please refer pin

configuration in page1 for correct pin assignment.

Copyright  ANPEC Electronics Corp. Rev. A.3 - Feb., 2004

Description

CC

raises above the reset threshold.

CC

is below the reset threshold and remains

CC

raises above the reset threshold.

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APR3101/2/3

Block Diagram

c c

V

MR

Reset

Generator

+ Timer

Oscillator

REF

V

RESET

GND

APR3101

MR

c c

V

Reset

GND

Generator

+ Timer

Oscillator

V

REF

APR3102

RESET

MR

c c

V

RESET

Copyright  ANPEC Electronics Corp. Rev. A.3 - Feb., 2004

GND

Reset

Generator

+ Timer

Oscillator

V

REF

APR3103

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APR3101/2/3

Part Number Description

Part Number Part Description

APR3101 Reset Output Push Pull Active Low with Delay APR3102 Reset Output Push Pull Active High with Delay APR3103 Reset Output Open Drain Active Low with Delay

Electrical Characteristics

VIN = 5V, TA = -40 to 85°C unless otherwise noted. Typical values are at TA=25°C, VCC = 5V for 4.38V versions, VCC = 3.3V for 3.08/2.93V versions, VCC = 3.0V for 2.63V. versions and VCC = 2.5V for 2.32V versions, VCC = 2.0V for 1.75V versions , VCC = 1.8V for 1.5V versions.

Symbol Parameter Test Conditions

VCC

V

T

VOH

T

V V

RMR

Supply Voltage

ICC

Supply Current V T

VTH

Reset Threshold Hysteresis Range 20 mV

HYST

Reset Timeout Period

RTP

VOL

Reset Output Low I Reset Output High I

TD

V

to Reset Delay VCC=VTH to (VTH-100mV) 25

CC

ILE

Reset Output Leakage 0.5 MR Minimum Pulse Width 10

MPW

MR to Reset Delay 0.5

MRD

MR Input Low Threshold 0.4* V

MIL

MR Input High Threshold 0.5* V

MIH

MR Pull-Up resistance

=1.5V~6V 1.5 4

CC

=-40 to 85°C 3 5

A

T A=25°C ±1.5% T

=-40 to 85°C ±2%

A

150 250 350

=1.2mA 0.5 V

SINK

=0.6mA 0.8*VCC

SOURCE

APR3101/2/3

Min. Typ. Max.

1.2 6

V

CC

30 47 70

Unit

V

µ

A

ms

µ

S

µ

A

µ

S

µ

S

KΩ

Application Circuit

CC

V

CC

V

APR3103 RESET

GND

Copyright  ANPEC Electronics Corp. Rev. A.3 - Feb., 2004

100k

RESET INPUT

V

µ

GND

CC

V

CC

P

APR3101 APR3102

CC

V

GND

RESET (RESET)

CC

V

RESET

P

µ

INPUT

GND

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APR3101/2/3

Timing Chart

Vcc

(APR3102)

RESE T

Reset Threshold Reset Threshold

(APR3101/ 3)

RESE T

MR

Reset Timeout P eriod 250ms

MR to Reset Delay 0.5us

Vc c t o Res et Delay 25us

Reset Timeout P eriod 250ms

Copyright  ANPEC Electronics Corp. Rev. A.3 - Feb., 2004

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