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Supervisory Circuits with Watchdog
and Manual Reset in 5-Lead SOT-23
Data Sheet ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
Rev. F Document Feedback
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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
04533-001
Figure 1.
ADM6320
V
CC
MR
GND WDI
RESET
RESET
GENERATOR
WATCHD
OG
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
microprocessor 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 parts feature
different combinations of watchdog input, manual reset input,
and output stage configuration, as shown in Table 1.
Each part 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
Verzeichnis
- ・ Konfiguration des Pinbelegungsdiagramms on Seite 6
- ・ Abmessungen des Paketumrisses on Seite 13
- ・ Teilenummerierungssystem on Seite 13
- ・ Typisches Anwendungsschaltbild on Seite 10
- ・ Beschreibung der Funktionen on Seite 6
- ・ Technische Daten on Seite 3 Seite 5
- ・ Anwendungsbereich on Seite 10
- ・ Elektrische Spezifikation on Seite 7
