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ADM6320CZ29ARJ-RL7

P1-P3P4-P6P7-P9P10-P12P13-P14
Supervisory Circuits with Watchdog
and Manual Reset in 5-Lead SOT-23
Data Sheet ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
Rev. H Document Feedback
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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 ©2004–2015 Analog Devices, Inc. All rights reserved.
Technical Support www.analog.com
FEATURES
26 reset threshold options
2.5 V to 5 V in 100 mV increments
4 reset timeout options
1 ms, 20 ms, 140 ms, and 1120 ms (minimum)
4 watchdog timeout options
6.3 ms, 102 ms, 1600 ms, and 25.6 sec (typical)
Manual reset input
Reset output stages
Push-pull active low
Open-drain active low
Push-pull active high
Low power consumption: 5 μA
Guaranteed reset output valid to V
CC
= 1 V
Power supply glitch immunity
Specified over industrial temperature range
5-lead SOT-23 package
APPLICATIONS
Microprocessor systems
Computers
Controllers
Intelligent instruments
Portable equipment
FUNCTIONAL BLOCK DIAGRAMS
ADM6316
V
CC
V
CC
MR
GND WDI
RESET
RESET
GENERATOR
WATCHDOG
DETECTOR
DEBOUNCE
V
REF
0
4533-001
Figure 1.
ADM6320
V
CC
MR
GND WDI
RESET
RESET
GENERATOR
WATCHDOG
DETECTOR
DEBOUNCE
V
REF
04533-028
Figure 2.
GENERAL DESCRIPTION
The ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/
ADM6321/ADM6322 are supervisory circuits that monitor
power supply voltage levels and code execution integrity in
microprocessor-based systems. As well as providing power-on
reset signals, an on-chip watchdog timer can reset the micro-
processor if it fails to strobe within a preset timeout period. A
reset signal can also be asserted by an external push button
through a manual reset input. The seven devices feature different
combinations of watchdog input, manual reset input, and output
stage configuration, as shown in Table 1.
Each device is available in a choice of 26 reset threshold options
ranging from 2.5 V to 5 V in 100 mV increments. There are also
four reset timeout options of 1 ms, 20 ms, 140 ms, and 1120 ms
(minimum) and four watchdog timeout options of 6.3 ms, 102 ms,
1600 ms, and 25.6 sec (typical).
The ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/
ADM6321/ADM6322 are available in 5-lead SOT-23 packages
and typically consume only 3 μA, making them suitable for use
in low power portable applications.
Table 1. Selection Table
Part No. Watchdog Manual Reset
Output Stage
RESET
RESET
ADM6316 Yes Yes Push-pull No
ADM6317 Yes Yes No Push-pull
ADM6318 Yes No Push-pull Push-pull
ADM6319 No Yes Push-pull Push-pull
ADM6320 Yes Yes Open-drain No
ADM6321 Yes No Open-drain Push-pull
ADM6322 No Yes Open-drain Push-pull
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322 Data Sheet
Rev. H | Page 2 of 14
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Functional Block Diagrams ............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 5
ESD Caution .................................................................................. 5
Pin Configurations and Function Descriptions ........................... 6
Typical Performance Characteristics ............................................. 7
Circuit Description ........................................................................... 9
Reset Output ................................................................................. 9
Open-Drain
RESET
Output ........................................................9
Manual Reset Input .......................................................................9
Watchdog Input .............................................................................9
Applications Information .............................................................. 10
Watchdog Input Current ........................................................... 10
Negative Going V
CC
Transie nts ................................................. 10
Ensuring Reset Valid to V
CC
= 0 V ........................................... 10
Watchdog Software Considerations ......................................... 10
Model Options ................................................................................ 11
Outline Dimensions ....................................................................... 13
Ordering Guide .......................................................................... 14
REVISION HISTORY
12/15—Rev. G to Rev. H
Added Endnote 1 and Endnote 2, Table 2 ..................................... 3
Change to Model Options Section Title ...................................... 11
Added Endnote 1, Table 5.............................................................. 11
Changes to Table 8 .......................................................................... 12
Changes to Ordering Guide .......................................................... 14
1/15—Rev. F to Rev. G
Changes to Table 8 .......................................................................... 12
5/13—Rev. E to Rev. F
Changes to Table 8 .......................................................................... 12
Changes to Ordering Guide .......................................................... 13
10/10—Rev. D to Rev. E
Changes to Table 8 .......................................................................... 12
Updated Outline Dimensions ....................................................... 13
8/08—Rev. C to Rev. D
Change to Figure 18 ......................................................................... 9
4/07—Rev. B to Rev. C
Added Figure 2................................................................................... 1
Changes to Figure 23 ...................................................................... 13
Changes to Ordering Guide .......................................................... 13
1/07—Rev. A to Rev. B
Changes to Functional Block Diagram ........................................... 1
Changes to Figure 18 ...................................................................... 10
5/06—Rev. 0 to Rev. A
Updated Format .................................................................. Universal
Changes to Functional Block Diagram ........................................... 1
Changes to Table 8 .......................................................................... 12
Changes to Figure 22 ...................................................................... 13
Changes to Ordering Guide .......................................................... 13
10/04—Revision 0: Initial Version
Data Sheet ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
Rev. H | Page 3 of 14
SPECIFICATIONS
V
CC
= full operating range, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Table 2.
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
SUPPLY
V
CC
Operating Voltage Range 1 5.5 V
Supply Current 10 20 µA V
CC
= 5.5 V
5 12 µA V
CC
= 3.6 V
RESET THRESHOLD VOLTAGE V
TH
− 1.5% V
TH
V
TH
+ 1.5% V T
A
= 25°C
V
TH
− 2.5% V
TH
V
TH
+ 2.5% V T
A
= −40°C to +85°C
RESET THRESHOLD TEMPERATURE
COEFFICIENT
40 ppm/°C
RESET THRESHOLD HYSTERESIS 3 mV
RESET TIMEOUT PERIOD
ADM63xxA
1
1 1.4 2 ms
ADM63xxB
1
20 28 40 ms
ADM63xxC
1
140 200 280 ms
ADM63xxD
1
1120 1600 2240 ms
V
CC
TO RESET DELAY 40 µs V
CC
falling at 1 mV/µs
PUSH-PULL OUTPUT (ADM6316, ADM6317,
ADM6318, ADM6319, ADM6321, ADM6322)
RESET
Output Voltage
0.3 V
V
CC
≥ 1.0 V, I
SINK
= 50 µA
0.3 V
V
CC
≥ 1.2 V, I
SINK
= 100 µA
0.3 V V
CC
≥ 2.7 V, I
SINK
= 1.2 mA
0.4 V V
CC
≥ 4.5 V, I
SINK
= 3.2 mA
0.8 × V
CC
V V
CC
≥ 2.7 V, I
SOURCE
= 500 µA
V
CC
− 1.5 V V
CC
≥ 4.5 V, I
SOURCE
= 800 µA
RESET
Rise Time
5
25
ns
From 10% to 90% V
CC
, C
L
= 5 pF,
V
CC
= 3.3 V
RESET Output Voltage 0.3 V V
CC
≥ 2.7 V, I
SINK
= 1.2 mA
0.4 V V
CC
≥ 4.5 V, I
SINK
= 3.2 mA
0.8 × V
CC
V V
CC
≥ 1.8 V, I
SOURCE
= 150 µA
0.8 × V
CC
V
V
CC
≥ 2.7 V, I
SOURCE
= 500 µA
V
CC
− 1.5 V V
CC
≥ 4.5 V, I
SOURCE
= 800 µA
OPEN-DRAIN OUTPUT (ADM6320, ADM6321,
ADM6322)
RESET
Output Voltage
0.3
V
V
CC
≥ 1.0 V, I
SINK
= 50 µA
0.3 V V
CC
≥ 1.2 V, I
SINK
= 100 µA
0.3 V V
CC
≥ 2.7 V, I
SINK
= 1.2 mA
0.4 V V
CC
≥ 4.5 V, I
SINK
= 3.2 mA
Open-Drain Reset Output Leakage Current 1 µA
WATCHDOG INPUT (ADM6316, ADM6317,
ADM6318, ADM6320, ADM6321)
Watchdog Timeout Period
ADM63xxxW
2
4.3 6.3 9.3 ms
ADM63xxxX
2
71 102 153 ms
ADM63xxxY
2
1.12 1.6 2.4 sec
ADM63xxxZ
2
17.9 25.6 38.4 sec
WDI Pulse Width 50 ns V
IL
= 0.3 × V
CC
, V
IH
= 0.7 × V
CC
WDI Input Threshold 0.3 × V
CC
0.7 × V
CC
V
WDI Input Current 120 160 µA V
WDI
= V
CC
, time average
−20 −15 µA V
WDI
= 0, time average
P1-P3P4-P6P7-P9P10-P12P13-P14

ADM6320CZ29ARJ-RL7

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Manufacturer:
Analog Devices Inc.
Description:
Supervisory Circuits Watchdog Supervisor with MR. IC.
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