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ADM6316CY46ARJ-RL7-ADM6318CY46ARJ-RL7-ADM6318CZ28ARJ-RL7-ADM6320CY46ARJ-RL7-ADM6321CY46ARJ-RL7-ADM6322C46ARJ-RL7
Supervisory Circuit with Manual Reset and Dual Active-Low/Active-High, Push-Pull Reset Outputs
Supervisory Circuits with Watchdog
and Manual Reset in 5-Lead SOT-23
Rev. 0
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 (min)
4 watchdog timeout options:
6.3 ms, 102 ms, 1600 ms, and 25.6s (typ)
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 VCC = 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 DIAGRAM
VCC
GNDWDI
RESET04533-0-001
Figure 1.
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 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 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
(min) and four watchdog timeout options of 6.3 ms, 102 ms,
1600 ms, and 25.6s (typ).
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
TABLE OF CONTENTS Specifications.....................................................................................3
Absolute Maximum Ratings............................................................5
ESD Caution..................................................................................5
Pin Configurations and Function Descriptions...........................6
Typical Performance Characteristics.............................................7
Circuit Description.........................................................................10
Reset Output...............................................................................10
Open-Drain RESET Output......................................................10
Manual Reset Input....................................................................10
Watchdog Input..........................................................................10
Application Information................................................................11
Watchdog Input Current...........................................................11
Negative-Going VCC Transients................................................11
Ensuring Reset Valid to VCC = 0 V...........................................11
Watchdog Software Considerations.........................................11
Outline Dimensions.......................................................................12
Ordering Guide..........................................................................12
REVISION HISTORY
10/04—Revision 0: Initial Version SPECIFICATIONS VCC = full operating range, TA = TMIN to TMAX, unless otherwise noted.
Table 2.
ABSOLUTE MAXIMUM RATINGS TA = 25°C, unless otherwise noted.
Table 3. Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
GND
VCC
WDI04533-0-002
Figure 2. ADM6316/ADM6320 Pin Configuration
RESET
GND
VCC
WDI04533-0-003
Figure 3. ADM6317 Pin Configuration
GND
RESET
VCC
WDI04533-0-004
Figure 4. ADM6318/ADM6321 Pin Configuration
GND
RESET
VCC04533-0-004
Figure 5. ADM6319/ADM6322 Pin Configuration
Table 4. Pin Function Descriptions
