Supervisory Circuits with Watchdog
and Manual Reset in 5-Lead SOT-23
ADM8316/ADM8318/ADM8319/ADM8320/ADM8321/ADM8322
Data Sheet
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
27 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
ADM8316
V
CC
V
CC
RESET
GENERATOR
RESET
V
REF
6.3 ms, 102 ms, 1.6 sec, and 25.6 sec (typical)
Manual reset input
Multiple reset output options
DEBOUNCE
MR
WATCHDOG
DETECTOR
Low power consumption
Specified over wide temperature range (−40°C to +125°C)
Qualified for automotive applications
5-lead SOT-23 package
GND
WDI
Figure 1. ADM8316
APPLICATIONS
ADM8320
Automotive infotainment
Microprocessor systems
Computers
RESET
V
CC
RESET
GENERATOR
V
REF
Controllers
Intelligent instruments
Portable equipment
MR
DEBOUNCE
WATCHDOG
DETECTOR
GND
WDI
Figure 2. ADM8320
GENERAL DESCRIPTION
The ADM8316/ADM8318/ADM8319/ADM8320/ADM8321/
ADM8322 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 switch through a manual reset input.
The six devices feature different combinations of watchdog
input, manual reset input, and output stage configuration,
as shown in Table 6.
Each device is available in a choice of 27 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,
1.6 sec, and 25.6 sec (typical). Not all device options are available
as standard models. See the Ordering Guide for details.
The ADM8316/ADM8318/ADM8319/ADM8320/ADM8321/
ADM8322 are available in 5-lead SOT-23 packages and typically
consume only 10 µA, making them suitable for use in low
power, portable applications.
Rev. C
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