Microprocessor Supervisory
Circuit in 4-Lead SC70
ADM6384
FEATURES
Precision power supply monitoring
31 reset threshold options: 1.58 V to 5.0 V
Four reset timeouts: 1 ms, 20 ms, 140 ms, and 1120 ms
Manual reset input
Reset output stage
Push-pull active-low
Guaranteed reset output valid to V
CC
= 1 V
Power supply glitch immunity
Specified over the −40°C to +125°C temperature range
4-lead SC70 package
FUNCTIONAL BLOCK DIAGRAMS
ADM6384
V
CC
V
REF
RESET
GENERATOR
RESET
MR
DEBOUNCE
GND
05305-001
Figure 1.
APPLICATIONS
Microprocessor systems
Computers
Controllers
Intelligent instruments
Portable equipment
V
CC
V
CC
ADM6384
MR
RESET
100kΩ
MICROPROCESSOR
RESET
GENERAL DESCRIPTION
The ADM6384 is a supervisory circuit that 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 debounced manual reset input of the
ADM6384 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 31 reset threshold options,
from 1.58 V to 5.0 V. The minimum reset timeout periods are
1 ms, 20 ms, 140 ms, and 1120 ms.
The ADM6384 is available in a 4-lead SC70 package and typi-
cally consumes only 7 µA, making it suitable for use in low
power, portable applications.
Figure 2.
Rev. C
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.
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Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2005–2011 Analog Devices, Inc. All rights reserved.
05305-002
GND
GND
ADM6384
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagrams ............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 5
ESD Caution .................................................................................. 5
Pin Configuration and Function Descriptions ............................. 6
Typical Performance Characteristics ..............................................7
Circuit Description............................................................................9
Reset Output ..................................................................................9
Manual Reset Input .......................................................................9
Applications Information .............................................................. 10
Negative-Going V
CC
Transients ................................................ 10
Ensuring Reset Valid to V
CC
= 0 V ........................................... 10
Outline Dimensions ....................................................................... 11
Ordering Guide .......................................................................... 11
REVISION HISTORY
4/11—Rev. B to Rev. C
Updated Outline Dimensions ....................................................... 11
Changes to Ordering Guide .......................................................... 11
7/08—Rev. A to Rev. B
Changes to Figure 5, Figure 8, and Figure 9.................................. 7
Changes to Figure 10 ........................................................................ 8
Changes to Figure 15 ...................................................................... 11
Changes to Ordering Guide .......................................................... 11
1/07—Rev. 0 to Rev. A
Updated Format .................................................................. Universal
Changes to Specifications Table ...................................................... 3
Updated Outline Dimensions ....................................................... 11
Changes to Ordering Guide .......................................................... 11
7/05—Revision 0: Initial Version
Rev. C | Page 2 of 12
ADM6384
SPECIFICATIONS
V
CC
= full operating range, T
A
= −40°C to +125°C, unless otherwise noted.
Table 1.
Parameter
SUPPLY
V
CC
Operating Voltage Range
Supply Current
Min
1
7
6
4
3
4.88
4.78
4.68
4.58
4.51
4.39
4.27
4.19
4.1
4.0
3.9
3.8
3.71
3.61
3.51
3.41
3.32
3.22
3.12
3.00
2.93
2.85
2.73
2.63
2.56
2.44
2.34
2.26
2.13
1.62
1.54
5.00
4.90
4.80
4.70
4.63
4.5
4.38
4.30
4.2
4.1
4.0
3.9
3.8
3.7
3.6
3.5
3.4
3.3
3.2
3.08
3.0
2.93
2.8
2.70
2.63
2.5
2.4
2.31
2.19
1.67
1.58
60
35
2 × V
TH
1
20
140
1120
2
40
280
2240
Typ
Max
5.5
13
11
7
6
5.12
5.02
4.92
4.82
4.74
4.61
4.48
4.41
4.31
4.2
4.1
4.0
3.9
3.79
3.69
3.59
3.49
3.38
3.28
3.15
3.08
3.00
2.87
2.77
2.69
2.56
2.46
2.37
2.24
1.71
1.61
Unit
V
µA
µA
µA
µA
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
ppm/°C
µs
mV
ms
ms
ms
ms
Test Conditions/Comments
V
CC
= 5.5 V, no load
V
CC
= 3.6 V, no load
V
CC
= 2.5 V, no load
1
V
CC
= 1.8 V, no load
1
RESET THRESHOLD VOLTAGE
ADM6384x50x
ADM6384x49x
ADM6384x48x
ADM6384x47x
ADM6384x46x
ADM6384x45x
ADM6384x44x
ADM6384x43x
ADM6384x42x
ADM6384x41x
ADM6384x40x
ADM6384x39x
ADM6384x38x
ADM6384x37x
ADM6384x36x
ADM6384x35x
ADM6384x34x
ADM6384x33x
ADM6384x32x
ADM6384x31x
ADM6384x30x
ADM6384x29x
ADM6384x28x
ADM6384x27x
ADM6384x26x
ADM6384x25x
ADM6384x24x
ADM6384x23x
ADM6384x22x
ADM6384x17x
ADM6384x16x
RESET THRESHOLD TEMPERATURE COEFFICIENT
V
CC
to Reset Delay
RESET THRESHOLD HYSTERESIS
RESET TIMEOUT PERIOD
ADM6384xxD1
ADM6384xxD2
ADM6384xxD3
ADM6384xxD4
V
CC
falling at 10 mV/µs from V
TH
+
100 mV to V
TH
− 100 mV
Rev. C | Page 3 of 12
ADM6384
Parameter
MANUAL RESET INPUT
MR Input Threshold
V
IL
V
IH
MR Input Pulse Width
MR Glitch Rejection
MR Pull-Up Resistance
MR to Reset Delay
RESET OUTPUT VOLTAGE
V
OL
Min
Typ
Max
Unit
Test Conditions/Comments
0.3 × V
CC
0.8
0.7 × V
CC
2.4
1
32
100
63
200
100
V
V
V
V
µs
ns
kV
ns
V
V
V
V
V
V
CC
< 4 V
V
CC
> 4 V
V
CC
< 4 V
V
CC
> 4 V
0.3
0.3
0.4
0.8 × V
CC
0.8 × V
CC
V
OH
1
V
CC
≥ 1.0 V, I
SINK
= 80 µA
V
CC
≥ 2.5 V, I
SINK
= 1.2 mA
V
CC
≥ 4.5 V, I
SINK
= 3.2 mA
V
CC
≥ 2.5 V, I
SOURCE
= 500 µA
V
CC
≥ 4.5 V, I
SOURCE
= 800 µA
T
A
= 25°C only.
Rev. C | Page 4 of 12
ADM6384
ABSOLUTE MAXIMUM RATINGS
T
A
= 25°C, unless otherwise noted.
Table 2.
Parameter
V
CC
RESET
Output Current (RESET)
Operating Temperature Range
Storage Temperature Range
θ
JA
Thermal Impedance, SC70
Soldering Temperature
Sn/Pb
Pb-Free
Rating
−0.3 V to +6 V
−0.3 V to +6 V
20 mA
−40°C to +125°C
−65°C to +150°C
331°C/W
240°C, 30 sec
260°C, 40 sec
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; 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.
ESD CAUTION
Rev. C | Page 5 of 12
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