Supervisory Circuits with Watchdog
and Manual Reset in 5-Lead SOT-23
Data Sheet ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
FEATURES FUNCTIONAL BLOCK DIAGRAMS
26 reset threshold options
ADM6316
2.5 V to 5 V in 100 mV increments
V
CC
4 reset timeout options
V
CC
1 ms, 20 ms, 140 ms, and 1120 ms (minimum)
RESET
RESET
GENERATOR
V
REF
4 watchdog timeout options
6.3 ms, 102 ms, 1600 ms, and 25.6 sec (typical)
MR DEBOUNCE
Manual reset input
WATCHDOG
Reset output stages
DETECTOR
Push-pull active low
Open-drain active low
GND WDI
Push-pull active high
Figure 1.
Low power consumption: 5 A
Guaranteed reset output valid to VCC = 1 V
ADM6320
Power supply glitch immunity
Specified over industrial temperature range
V
CC
5-lead SOT-23 package
RESET
RESET
GENERATOR
V
REF
APPLICATIONS
Microprocessor systems
MR DEBOUNCE
WATCHDOG
Computers
DETECTOR
Controllers
Intelligent instruments
GND WDI
Portable equipment
Figure 2.
GENERAL DESCRIPTION
Each device is available in a choice of 26 reset threshold options
The ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/
ADM6321/ADM6322 are supervisory circuits that monitor ranging from 2.5 V to 5 V in 100 mV increments. There are also
power supply voltage levels and code execution integrity in four reset timeout options of 1 ms, 20 ms, 140 ms, and 1120 ms
microprocessor-based systems. As well as providing power-on (minimum) and four watchdog timeout options of 6.3 ms, 102 ms,
reset signals, an on-chip watchdog timer can reset the micro- 1600 ms, and 25.6 sec (typical). Not all device options are
processor if it fails to strobe within a preset timeout period. A released for sale as standard models. See the Ordering Guide for
reset signal can also be asserted by an external push button details.
through a manual reset input. The seven devices feature different
The ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/
combinations of watchdog input, manual reset input, and output
ADM6321/ADM6322 are available in 5-lead SOT-23 packages
stage configuration, as shown in Table 1.
and typically consume only 3 A, making them suitable for use
in low power portable applications.
Table 1. Selection Table
Output Stage
RESET
Part No. Watchdog Manual 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
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04533-028
04533-001ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322 Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Open-Drain RESET Output ........................................................9
Applications ....................................................................................... 1
Manual Reset Input .......................................................................9
Functional Block Diagrams ............................................................. 1
Watchdog Input .............................................................................9
General Description ......................................................................... 1
Applications Information .............................................................. 10
Revision History ............................................................................... 2
Watchdog Input Current ........................................................... 10
Specifications ..................................................................................... 3
Negative Going V Transients ................................................. 10
CC
Absolute Maximum Ratings ............................................................ 5
Ensuring Reset Valid to V = 0 V ........................................... 10
CC
ESD Caution .................................................................................. 5
Watchdog Software Considerations ......................................... 10
Pin Configurations and Function Descriptions ........................... 6
Device Model Options ................................................................... 11
Typical Performance Characteristics ............................................. 7
Outline Dimensions ....................................................................... 13
Circuit Description ........................................................................... 9
Ordering Guide .......................................................................... 13
Reset Output ................................................................................. 9
REVISION HISTORY
3/2018Rev. H to Rev. I
4/2007Rev. B to Rev. C
Added Figure 2 ................................................................................... 1
Changes to General Description Section ...................................... 1
Added Note 1, Table 2 ...................................................................... 3 Changes to Figure 23 ...................................................................... 13
Changed Model Options Section to Device Model Options Changes to Ordering Guide .......................................................... 13
Section .............................................................................................. 11
Changes to Device Model Options Section and Table 5 ........... 11 1/2007Rev. A to Rev. B
Deleted Table 8; Renumbered Sequentially ................................ 12 Changes to Functional Block Diagram ........................................... 1
Changes to Ordering Guide .......................................................... 13 Changes to Figure 18 ...................................................................... 10
12/2015Rev. G to Rev. H 5/2006Rev. 0 to Rev. A
Added Endnote 1 and Endnote 2, Table 2 ..................................... 3 Updated Format .................................................................. Universal
Change to Model Options Section Title ...................................... 11 Changes to Functional Block Diagram ........................................... 1
Added Endnote 1, Table 5 ............................................................. 11 Changes to Table 8 .......................................................................... 12
Changes to Table 8 .......................................................................... 12 Changes to Figure 22 ...................................................................... 13
Changes to Ordering Guide .......................................................... 14 Changes to Ordering Guide .......................................................... 13
1/2015Rev. F to Rev. G 10/2004Revision 0: Initial Version
Changes to Table 8 .......................................................................... 12
5/2013Rev. E to Rev. F
Changes to Table 8 .......................................................................... 12
Changes to Ordering Guide .......................................................... 13
10/2010Rev. D to Rev. E
Changes to Table 8 .......................................................................... 12
Updated Outline Dimensions ....................................................... 13
8/2008Rev. C to Rev. D
Change to Figure 18 ......................................................................... 9
Rev. I | Page 2 of 14