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ADM6316 Datasheet(PDF) 1 Page - Analog Devices

Part No. ADM6316
Description  Supervisory Circuits with Watchdog and Manual Reset in 5-Lead SOT-23
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ADM6316 Datasheet(HTML) 1 Page - Analog Devices

 
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Supervisory Circuits with Watchdog
and Manual Reset in 5-Lead SOT-23
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
Rev.PrC
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703
© 2004 Analog Devices, Inc. All rights reserved.
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 (3 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
ADM6316
VCC
VCC
MR
GND
WDI
RESET
RESET
GENERATOR
WATCHDOG
DETECTOR
DEBOUNCE
VREF
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
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.
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
Output Stage
Part No.
Watchdog
Manual Reset
RESET
RESET
ADM6316
Yes
Yes
Push-Pull
ADM6317
Yes
Yes
Push-Pull
ADM6318
Yes
Push-Pull
Push-Pull
ADM6319
Yes
Push-Pull
Push-Pull
ADM6320
Yes
Yes
Open-Drain
ADM6321
Yes
-
Open-Drain
Push-Pull
ADM6322
Yes
Open-Drain
Push-Pull
PRELIMINARY TECHNICAL DATA


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