Analog Devices ADM6384 prd Datasheet

Microprocessor Supervisory

Preliminary Technical Data

FEATURES

Precision 1.8V to 5V Power Supply Monitoring
31 Reset Threshold Options:

1.58V to 5.0V
Four Reset Timeouts:
1ms, 20ms, 140ms, 1120ms
Manual Reset Input
Reset Output Stage- Push-Pull Active-Low
Guaranteed Reset Output valid to V
Power Supply Glitch Immunity
Specified Over -40°C to +125°C Temperature Range
4-Lead SC70 Package

APPLICATIONS

Microprocessor Systems
Computers
Controllers
Intelligent Instruments
Portable Equipment

GENERAL DESCRIPTION

The ADM6384 is a supervisory circuit which monitors power
supply voltage levels in microprocessor-based systems. A
power-on-reset signal is generated when the supply voltage rises
to a preset threshold level. The ADM6384’s debounced manual
reset input can be used to initiate a reset by means of an
external push-button or logic signal.

The part is available in a choice of the following 31 reset
threshold options, from 1.58V to 5.0V. The minimum reset
timeout periods are 1ms, 20ms, 140ms and 1120ms.

The ADM6384 is available in a 4-lead SC70 package and
typically consumes only 7µA, making it suitable for use in low
power portable applications

CC

=1V

Circuit in 4-Lead SC70

ADM6384

FUNCTIONAL BLOCK DIAGRAM

ADM6384

V

CC

MR

V

REF

DEBOUNCE

ADM6384

MR

Figure 1. Typical ADM6384 Operating Circuit

V

CC

GND

RESET

GENERATOR

RESET

100K

RESET

GND

V

CC

MICROPROCESSOR

SYSTEM

RESET

GND

Rev. PrD

Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective companies.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone]
Fax: [phone] © 2005 Analog Devices, Inc. All rights reserved.

www.analog.com

ADM6384 Preliminary Technical Data

ADM6384—SPECIFICATIONS

Table 1. VCC=Full Operating Range, TA=-40oC to 125oC, unless otherwise noted

Parameter Min Typ Max Units Test Conditions/Comments

SUPPLY
VCC Operating Voltage Range 1 5.5 V

Supply Current 7 13 µA VCC=5.5V, no load
6 11 µA VCC=3.6V, no load
4 7 µA VCC=2.5V, no load1
3 6 µA VCC=1.8V, no load1

RESET THRESHOLD VOLTAGE

ADM6384_50_
ADM6384_49_ 4.78 4.90 5.02 V
ADM6384_48_
ADM6384_47_ 4.58 4.70 4.82 V
ADM6384_46_
ADM6384_45_ 4.39 4.5 4.61 V
ADM6384_44_
ADM6384_43_ 4.19 4.30 4.41 V
ADM6384_42_ 4.1 4.2 4.31 V
ADM6384_41_ 4.0 4.1 4.2 V
ADM6384_40_ 3.9 4.0 4.1 V
ADM6384_39_ 3.8 3.9 4.0 V
ADM6384_38_ 3.71 3.8 3.9 V
ADM6384_37_ 3.61 3.7 3.79 V
ADM6384_36_ 3.51 3.6 3.69 V
ADM6384_35_ 3.41 3.5 3.59 V
ADM6384_34_ 3.32 3.4 3.49 V
ADM6384_33_ 3.22 3.3 3.38 V
ADM6384_32_ 3.12 3.2 3.28 V
ADM6384_31_
ADM6384_30_ 2.93 3.0 3.08 V
ADM6384_29_
ADM6384_28_ 2.73 2.8 2.87 V
ADM6384_27_ 2.63 2.70 2.77 V
ADM6384_26_
ADM6384_25_ 2.44 2.5 2.56 V
ADM6384_24_ 2.34 2.4 2.46 V
ADM6384_23_
ADM6384_22_
ADM6384_17_

ADM6384_16_
RESET THRESHOLD TEMPERATURE COEFFICIENT 40 ppm/°C
RESET THRESHOLD HYSTERESIS 3 mV
RESET TIMEOUT PERIOD

ADM6384_ _D1 1 2 ms

ADM6384_ _D2 20 40 ms

ADM6384_ _D3 140 280 ms

ADM6384_ _D4 1120 2240 ms

VCC to RESET DELAY
RESET

Output Voltage

VOL 0.3 V VCC>=1.0V, I

0.3 V VCC>=2.5V, I

4.88 5.00 5.12 V

4.68 4.80 4.92 V

4.51 4.63 4.74 V

4.27 4.38 4.48 V

3.00 3.08 3.15 V

2.85 2.93 3.00 V

2.56 2.63 2.69 V

2.26 2.31 2.37 V

2.13 2.19 2.24 V

1.62 1.67 1.71 V

1.54 1.58 1.61 V

35 µs V

falling at 10mV/µs

CC

=80µA

SINK

=1.2mA

SINK

Rev. PrD | Page 2 of 10

Preliminary Technical Data ADM6384

Parameter Min Typ Max Units Test Conditions/Comments

0.4 V VCC>=4.5V, I
VOH 0.8x VCC V VCC>=2.5V, I

0.8x VCC V VCC>=4.5V, I
RESET

Rise Time

MANUAL RESET INPUT
MR Input Threshold

VIL 0.3xVCC V VCC <4V

0.8 V VCC <4V
VIH 0.7xVCC V VCC >4V

2.4 V VCC >4V
MR Input Pulse Width
MR Glitch Rejection
MR Pull-up Resistance
MR to Reset Delay

1

T

= 25oC Only

A

5 25 ns

1 µs

100 ns

32 63 100

200 ns

k⍀

From 10% to 90% V

=3.3V

V

CC

=3.2mA

SINK

SOURCE

SOURCE

=500µA

=800µA

, CL=5pF,

CC

ABSOLUTE MAXIMUM RATINGS

Table 2. TA = 25°C unless otherwise noted.

Parameter Rating
VCC -0.3V to +6V
RESET

Output Current (
Operating Temperature Range -40°C to +125°C
Storage Temperature Range -65°C to +150°C

θJA Thermal Impedance, SC70

Lead Temperature
Soldering (10 sec) 300°C
Vapour Phase (60 sec) 215°C
Infrared (15 sec) 220°C

RESET

)

-0.3V to +6V
20mA

146°C/W

Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only and functional operation of the device at these or
any other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.

Rev. PrD | Page 3 of 10