Analog Devices ADM6711 13 Datasheet

Microprocessor Supervisory

Circuit in 4-Lead SC70

ADM6711/ADM6713

FEATURES
Specified Over Temperature
Low Power Consumption (12 ␮A)
Precision Monitoring of 2.5 V, 3 V, 3.3 V, and 5 V Power

Supply Voltages

Reset Timeout

Period of 140 ms (Min)
Manual Reset Input
Output Stages

Push-Pull RESET Output (ADM6711)
Open-Drain RESET Output (ADM6713)

Reset Assertion Down to 1 V V

CC

Power Supply Glitch Immunity
4-Lead SC70 Package

APPLICATIONS
Microprocessor Systems
Computers
Controllers
Intelligent Instruments
Automotive Systems
Portable Instruments

GENERAL DESCRIPTION

The ADM6711/ADM6713 are reset generator circuits suitable
for use in microprocessor based systems. They provide a reset
signal on power-up, power-down, and whenever the supply volt­age falls below a preset threshold. In addition, both parts have a
debounced manual reset input so that a reset signal can also be
initiated with an external switch or logic signal.

With six different reset threshold options available ranging from

2.32 V to 4.63 V, the ADM6711/ADM6713 are suitable for
monitoring 2.5 V, 3 V, 3.3 V, and 5 V supplies. A reset timeout
of at least 140 ms occurs when V

rises above the threshold.

CC

This gives the supply voltage time to stabilize before the micro­processor starts up.

The ADM6711 has a push-pull output, so no additional external
components are needed. The ADM6713’s open-drain output
requires an external pull-up resistor, which can be connected to a
voltage higher than V

, if desired.

CC

FUNCTIONAL BLOCK DIAGRAMS

ADM6711

V

CC

MR

V

CC

MR

V

REF

DEBOUNCE

ADM6713

V

REF

DEBOUNCE

RESET

GENERATOR

240 ms

RESET

GENERATOR

240 ms

RESET

GND

RESET

GND

The parts are highly reliable with accurate voltage references
and immunity to fast, negative-going transients on V

CC

. Low
current consumption and space-efficient 4-lead SC70 packaging
make the ADM6711/ADM6713 ideal for use in low power
portable applications.

V

CC

V

CC

ADM6711/

ADM6713

MR

RESET

GND GND

*R

PULL-UP

*ADM6713 ONLY

RESET

V

CC

␮P

SYSTEM

Figure 1. Typical Operating Circuit

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Fax: [phone] © 2003 Analog Devices, Inc. All rights reserved.

ADM6711/ADM6713–SPECIFICATIONS

(VCC = Full Operating Range; TA = T

MIN

to T

MAX

; VCC Typ = 5 V

for L/M, 3.3 V for T/S, 3 V for R, and 2.5 V for Z models; unless otherwise noted.)

Parameter Min Typ Max Unit Test Conditions/Comments

SUPPLY

VCC Operating Voltage Range 1.0 5.5 V TA = 0°C to 70°C

1.2 5.5 V T

Supply Current 16 35 µAV

12 30 µAV

= –40°C to +125°C

A

< 5.5 V, ADM671_L/M,

CC

= –40°C to +85°C

T

A

< 3.6 V, ADM671_R/S/T/Z,

CC

TA = –40°C to +85°C

60 µAV

60 µAV

< 5.5 V, ADM671_L/M,

CC

= 85°C to 125°C

T

A

< 3.6 V, ADM671_R/S/T/Z,

CC

TA = 85°C to 125°C

RESET VOLTAGE THRESHOLD

ADM671_L 4.56 4.63 4.70 V TA = 25°C

4.50 4.75 V T

4.44 4.82 V T

ADM671_M 4.31 4.38 4.45 V T

4.25 4.50 V T

4.20 4.56 V T

ADM671_T 3.04 3.08 3.11 V T

3.00 3.15 V T

2.95 3.21 V T

ADM671_S 2.89 2.93 2.96 V T

2.85 3.00 V T

2.81 3.05 V T

ADM671_R 2.59 2.63 2.66 V T

2.55 2.70 V T

2.52 2.74 V T

ADM671_Z 2.28 2.32 2.35 V T

2.25 2.38 V T

= –40°C to +85°C

A

= 85°C to 125°C

A

= 25°C

A

= –40°C to +85°C

A

= 85°C to 125°C

A

= 25°C

A

= –40°C to +85°C

A

= 85°C to 125°C

A

= 25°C

A

= –40°C to +85°C

A

= 85°C to 125°C

A

= 25°C

A

= –40°C to +85°C

A

= 85°C to 125°C

A

= 25°C

A

= –40°C to +85°C

A

2.22 2.42 V TA = 85°C to 125°C

RESET THRESHOLD TEMPERATURE
COEFFICIENT 30 ppm/°C

VCC to RESET DELAY 20 µsV
RESET ACTIVE TIMEOUT PERIOD 140 240 460 ms T

= VTH to (VTH – 100 mV)

CC

= –40°C to +85°C

A

100 640 ms TA = 85°C to 125°C

RESET OUTPUT VOLTAGE

Low (ADM6711/ADM6713) 0.3 V VCC = VTH min, I

= 1.2 mA,

SINK

ADM671_R/S/T/Z

0.4 V V

= VTH min, I

CC

= 3.2 mA,

SINK

ADM671_L/M

High (ADM6711) 0.8 V

CC

0.3 V V
VV

>1.0 V, I

CC

> VTH max, I

CC

SINK

= 50 µA

SOURCE

= 500 µA,

ADM6711R/S/T/Z

0.8 V

CC

VV

> VTH max, I

CC

SOURCE

= 800 µA,

ADM6711L/M

RESET OPEN-DRAIN OUTPUT
LEAKAGE CURRENT 1 µAV

> VTH, RESET deasserted

CC

MANUAL RESET (MR)

Input Threshold 0.3 V

CC

0.7 VCCVV

VV

IL

IH

Pull-Up Resistance 10 20 kΩ
Minimum Pulsewidth 1 µs
Glitch Immunity 100 ns
Reset Delay 200 ns

Specifications subject to change without notice.

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ADM6711/ADM6713

ABSOLUTE MAXIMUM RATINGS*

(TA = 25°C, unless otherwise noted.)

VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +6 V

RESET (Push-Pull) . . . . . . . . . . . . . . –0.3 V to (V

+ 0.3 V)

CC

RESET (Open-Drain) . . . . . . . . . . . . . . . . . . . –0.3 V to +6 V

MR . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to (V

+ 0.3 V)

CC

Input Current

, MR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA

V

CC

Output Current

Table I. RESET Threshold Options

Model RESET Threshold (V)

ADM671_L 4.63
ADM671_M 4.38
ADM671_T 3.08
ADM671_S 2.93
ADM671_R 2.63
ADM671_Z 2.32

RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA

Rate of Rise, V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 V/µs

CC

␪JA Thermal Impedance, SC70 . . . . . . . . . . . . . . . . . 146°C/W

Operating Temperature Range . . . . . . . . . . –40°C to +125°C

Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C

Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . . 300°C

*Stresses above those listed under Absolute Maximum Ratings may cause perma-

nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those listed in the operational
sections of this specification is not implied. Exposure to absolute maximum ratings
for extended periods of time may affect device reliability.

ORDERING GUIDE

Model RESET Threshold (V) Temperature Range Branding Quantity (k)

ADM6711LAKS-REEL 4.63 –40°C to +125°CM0B 10
ADM6711LAKS-REEL-7 4.63 –40°C to +125°CM0B 3
ADM6711MAKS-REEL 4.38 –40°C to +125°C M0C 10
ADM6711MAKS-REEL-7 4.38 –40°C to +125°C M0C 3
ADM6711TAKS-REEL 3.08 –40°C to +125°C M0D 10
ADM6711TAKS-REEL-7 3.08 –40°C to +125°C M0D 3
ADM6711SAKS-REEL 2.93 –40°C to +125°C M0E 10
ADM6711SAKS-REEL-7 2.93 –40°C to +125°C M0E 3
ADM6711RAKS-REEL 2.63 –40°C to +125°C M0F 10
ADM6711RAKS-REEL-7 2.63 –40°C to +125°C M0F 3
ADM6711ZAKS-REEL 2.32 –40°C to +125°C M0G 10
ADM6711ZAKS-REEL-7 2.32 –40°C to +125°C M0G 3
ADM6713LAKS-REEL 4.63 –40°C to +125°CM0H 10
ADM6713LAKS-REEL-7 4.63 –40°C to +125°CM0H 3
ADM6713MAKS-REEL 4.38 –40°C to +125°C M0J 10
ADM6713MAKS-REEL-7 4.38 –40°C to +125°C M0J 3
ADM6713TAKS-REEL 3.08 –40°C to +125°CM0K 10
ADM6713TAKS-REEL-7 3.08 –40°C to +125°CM0K 3
ADM6713SAKS-REEL 2.93 –40°C to +125°C M0L 10
ADM6713SAKS-REEL-7 2.93 –40°C to +125°C M0L 3
ADM6713RAKS-REEL 2.63 –40°C to +125°CM0M 10
ADM6713RAKS-REEL-7 2.63 –40°C to +125°CM0M 3
ADM6713ZAKS-REEL 2.32 –40°C to +125°C M0N 10
ADM6713ZAKS-REEL-7 2.32 –40°C to +125°C M0N 3

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection. Although the
ADM6711/ADM6713 feature proprietary ESD protection circuitry, permanent damage may occur on
devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are
recommended to avoid performance degradation or loss of functionality.

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