ADM6321 Analog Devices, ADM6321 Datasheet

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ADM6321

Manufacturer Part Number
ADM6321
Description
Supervisory Circuit with Watchdog, Manual Reset, and Active-High/Push-Pull Active-Low/Open-Drain
Manufacturer
Analog Devices
Datasheet

Specifications of ADM6321

Batt-backup-flg
No
Manual Reset Capability
No
Package
SOT
Power Fail Indicator
No
Reset Threshold Summary
26 Options--2.5 to 5V
Reset Output-stage
Active-High/Push-Pull,Active-Low/Open-Drain
Min Reset Timeout (ms)
1,1120,140,20
Typ Watchdog Timeout (ms)
102,1600,25,600,6.3
Watchdog Timer
Yes

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FEATURES
26 reset threshold options
4 reset timeout options
4 watchdog timeout options
Manual reset input
Reset output stages
Low power consumption: 5 μA
Guaranteed reset output valid to V
Power supply glitch immunity
Specified over industrial temperature range
5-lead SOT-23 package
APPLICATIONS
Microprocessor systems
Computers
Controllers
Intelligent instruments
Portable equipment
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.
Table 1. Selection Table
Part No.
ADM6316
ADM6317
ADM6318
ADM6319
ADM6320
ADM6321
ADM6322
Rev. E
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.
2.5 V to 5 V in 100 mV increments
1 ms, 20 ms, 140 ms, and 1120 ms (minimum)
6.3 ms, 102 ms, 1600 ms, and 25.6 sec (typical)
Push-pull active low
Open-drain active low
Push-pull active high
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
Watchdog
Yes
Yes
Yes
No
Yes
Yes
No
CC
= 1 V
Manual Reset
Yes
Yes
No
Yes
Yes
No
Yes
Supervisory Circuits with Watchdog
and Manual Reset in 5-Lead SOT-23
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
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.
V
MR
V
CC
MR
CC
V
V
REF
DEBOUNCE
REF
DEBOUNCE
FUNCTIONAL BLOCK DIAGRAMS
ADM6316
ADM6320
RESET
Push-pull
No
Push-pull
Push-pull
Open-drain
Open-drain
Open-drain
GND
©2004–2010 Analog Devices, Inc. All rights reserved.
GND
GENERATOR
GENERATOR
RESET
RESET
Figure 1.
Figure 2.
WATCHDOG
DETECTOR
WATCHDOG
DETECTOR
WDI
Output Stage
WDI
RESET
No
Push-pull
Push-pull
Push-pull
No
Push-pull
Push-pull
V
www.analog.com
CC
RESET
RESET

Related parts for ADM6321

ADM6321 Summary of contents

Page 1

... 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. RESET ...

Page 2

... ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagrams............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 5 ESD Caution.................................................................................. 5 Pin Configurations and Function Descriptions ........................... 6 Typical Performance Characteristics ............................................. 7 Circuit Description........................................................................... 9 Reset Output ................................................................................. 9 REVISION HISTORY 10/10—Rev Rev. E Changes to Table 8.......................................................................... 12 Updated Outline Dimensions ....................................................... 13 8/08— ...

Page 3

... TO RESET DELAY CC PUSH-PULL OUTPUT (ADM6316, ADM6317, ADM6318, ADM6319, ADM6321, ADM6322) RESET Output Voltage RESET Rise Time RESET Output Voltage OPEN-DRAIN OUTPUT (ADM6320, ADM6321, ADM6322) RESET Output Voltage Open-Drain Reset Output Leakage Current WATCHDOG INPUT (ADM6316, ADM6317, ADM6318, ADM6320, ADM6321) Watchdog Timeout Period ...

Page 4

... ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322 Parameter MANUAL RESET INPUT (ADM6316, ADM6317, ADM6319, ADM6320, ADM6322) MR Input Threshold MR Input Pulse Width MR Glitch Rejection MR Pull-Up Resistance MR to Reset Delay Min Typ Max 0.8 2.0 0.3 × V 0.7 × 100 230 Rev Page Unit Test Conditions/Comments V V > 4 < ...

Page 5

... ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 3. Parameter V CC RESET (ADM6320, ADM6321, ADM6322) All Other Pins Output Current (RESET, RESET) Operating Temperature Range Storage Temperature Range θ Thermal Impedance, SOT-23 JA Lead Temperature Soldering (10 sec) Vapor Phase (60 sec) Infrared (15 sec) Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device ...

Page 6

... Active-Low Reset Output. Asserted whenever V threshold Push-Pull Output Stage for the ADM6316/ADM6318/ADM6319. Open-Drain Output Stage for the ADM6320/ADM6321/ADM6322. Active-High Push-Pull Reset Output. Ground. Manual Reset Input. This is an active-low input that when forced low for at least 1 μs, generates a reset. It features a 52 kΩ internal pull-up. ...

Page 7

... ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322 TYPICAL PERFORMANCE CHARACTERISTICS 10.0 9.5 9.0 8 8.0 7.5 7.0 6.5 6 5.5 CC 5.0 4 4.0 3.5 –40 – TEMPERATURE (°C) Figure 7. Supply Current vs. Temperature (ADM6316/ADM6317/ADM6318/ADM6320/ADM6321 0.5 1.0 1.5 2.0 2.5 3.0 3.5 V (V) CC Figure 8. Supply Current vs. Supply Voltage 1.05 1.04 1.03 1.02 1.01 1.00 0.99 0.98 0.97 0.96 0.95 –40 – TEMPERATURE (°C) Figure 9. Normalized Reset Threshold vs. Temperature = 1 ...

Page 8

... Figure 16. Watchdog Input Minimum Pulse Width vs. Temperature Rev Page 190 180 170 160 150 140 130 120 110 100 –50 0 TEMPERATURE (°C) Figure 15. Manual Reset Minimum Pulse Width vs. Temperature (ADM6316/ADM6317/ADM6319/ADM6320/ADM6322) 3.8 3.6 3.4 NEGATIVE PULSE 3.2 3.0 2.8 2.6 2.4 POSITIVE PULSE 2.2 2.0 –40 10 TEMPERATURE (°C) (ADM6316/ADM6317/ADM6318/ADM6320/ADM6321 ...

Page 9

... In addition, problems with microprocessor code execution can be monitored and corrected with a watchdog timer (ADM6316/ADM6317/ ADM6318/ADM6320/ADM6321). If the user detects a problem with the system’s operation, a manual reset input is available (ADM6316/ADM6317/ADM6319/ADM6320/ADM6322) to reset the microprocessor, for example, by means of an external push button ...

Page 10

... TRANSIENTS CC To avoid unnecessary resets caused by fast power supply transients, the ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ ADM6321/ADM6322 are equipped with glitch rejection circuitry. The typical performance characteristic in Figure 14 plots V transient duration vs. the transient magnitude. The curves show combinations of transient magnitude and duration for which a reset is not generated for 4.63 V and 2.93 V reset threshold parts. For example, with the 2.93 V threshold, a transient that goes 100 mV below the threshold and lasts 8 μ ...

Page 11

... ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322 OPTIONS Table 5. Reset Voltage Threshold Options Part No. Min ADM63xxx50 4.925 ADM63xxx49 4.827 ADM63xxx48 4.728 ADM63xxx47 4.630 ADM63xxx46 4.561 ADM63xxx45 4.433 ADM63xxx44 4.314 ADM63xxx43 4.236 ADM63xxx42 4.137 ADM63xxx41 4.039 ADM63xxx40 3.940 ADM63xxx39 3.842 ADM63xxx38 3.743 ADM63xxx37 3.645 ADM63xxx36 3.546 ADM63xxx35 3.448 ADM63xxx34 3 ...

Page 12

... ADM6319C46-ARJZ-RL7 4.63 ADM6320CZ27-ARJZ-R7 2.7 ADM6320CX29-ARJZ-R7 2.93 ADM6320CY29-ARJ-RL7 2.93 ADM6320CY29-ARJZ-R7 2.93 ADM6320CZ29-ARJ-RL7 2.93 ADM6320CZ29-ARJZ-R7 2.93 ADM6320BX33-ARJZ-R7 3.3 ADM6320CW33-ARJZ-R7 3.3 ADM6320BX45-ARJZ-R7 4.5 ADM6320CY46-ARJ-RL7 4.63 ADM6320CY46-ARJZ-R7 4.63 ADM6321BZ25-ARJZ-R7 2.5 ADM6321AY43-ARJZ-R7 4.3 ADM6321CY46-ARJ-RL7 4.63 ADM6321CY46-ARJZ-R7 4.63 ADM6322C46-ARJ-RL7 4.63 ADM6322C46-ARJZ-RL7 4.63 Minimum Reset Timeout (ms) 140 1120 1120 1 1 140 140 20 1120 1120 20 140 140 140 140 140 140 140 140 20 140 140 20 140 140 ...

Page 13

... ADM6322xxARJZ-RL7 −40°C to +85°C 1 Complete the ordering code by inserting reset threshold, reset timeout, and watchdog timeout (ADM6316/ADM6317/ADM6318/ADM6320/ADM6321) suffixes from Table 5 to Table 7. No watchdog timeout is available for ADM6319/ADM6322. 2 Contact sales for the availability of nonstandard models. See Table 8 for a list of standard models. ...

Page 14

... ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322 NOTES Rev Page ...

Page 15

... ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322 NOTES Rev Page ...

Page 16

... ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322 NOTES ©2004–2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D04533-0-10/10(E) Rev Page ...

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