PRELIMINARY TECHNICAL DATA
Supervisory Circuits with Watchdog
and Manual Reset in 5-Lead SOT-23
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
FEATURES
FUNCTIONAL BLOCK DIAGRAM
26 reset threshold options:
2.5 V to 5 V in 100 mV increments
4 reset timeout options:
ADM6316
V
CC
1 ms, 20 ms, 140 ms, and 1120 ms (Min)
4 watchdog timeout options:
6.3 ms, 102 ms, 1600 ms, and 25.6s (Typ)
Manual reset input
V
CC
RESET
RESET
GENERATOR
V
REF
DEBOUNCE
MR
Reset output stages:
WATCHDOG
DETECTOR
Push-pull active-low
Open-drain active-low
Push-pull active-high
GND
WDI
Low power consumption (3 µA)
Guaranteed reset output valid to VCC = 1 V
Power supply glitch immunity
Specified over industrial temperature range
5-lead SOT-23 package
Figure 1.
APPLICATIONS
Microprocessor systems
Computers
Controllers
Intelligent instruments
Portable equipment
GENERAL DESCRIPTION
The ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/
ADM6321/ADM6322 are supervisory circuits which 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
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
(min) and four watchdog timeout options of 6.3 ms, 102 ms,
1600 ms, and 25.6s (typ).
microprocessor if it fails to strobe within a preset timeout
period. A reset signal can also be asserted by means of 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.
The ADM6316-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
Output Stage
RESET
RESET
Part No.
Watchdog
Manual Reset
ADM6316
ADM6317
ADM6318
ADM6319
ADM6320
ADM6321
ADM6322
Yes
Yes
Yes
–
Yes
Yes
–
Push-Pull
–
–
Push-Pull
Push-Pull
Push-Pull
–
Push-Pull
Push-Pull
Open-Drain
Open-Drain
Open-Drain
Yes
Yes
-
Yes
Yes
–
Push-Pull
Push-Pull
Yes
Rev.PrC
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