PRELIMINARY TECHNICAL DATA
Supervisory Circuits with Watchdog
and Manual Reset in 5-Lead SOT-23
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
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 V
CC
= 1 V
Power supply glitch immunity
Specified over industrial temperature range
5-lead SOT-23 package
FUNCTIONAL BLOCK DIAGRAM
ADM6316
V
CC
V
REF
V
CC
RESET
GENERATOR
RESET
MR
DEBOUNCE
WATCHDOG
DETECTOR
04533-0-001
GND
WDI
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
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.
Table 1. Selection Table
Output Stage
Part No.
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.
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.
Watchdog
Yes
Yes
Yes
–
Yes
Yes
–
Manual Reset
Yes
Yes
–
Yes
Yes
-
Yes
RESET
Push-Pull
–
Push-Pull
Push-Pull
Open-Drain
Open-Drain
Open-Drain
RESET
–
Push-Pull
Push-Pull
Push-Pull
–
Push-Pull
Push-Pull
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Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703
© 2004 Analog Devices, Inc. All rights reserved.
PRELIMINARY TECHNICAL DATA
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
TABLE OF CONTENTS
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 5
ESD Caution.................................................................................. 5
Pin Configurations and Function Descriptions ........................... 6
Typical Performance Characteristics ..............................................7
Outline Dimensions ....................................................................... 10
Ordering Guide .......................................................................... 11
Rev.PrC | Page 2 of 11
PRELIMINARY TECHNICAL DATA
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
SPECIFICATIONS
V
CC
= full operating range, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Table 2.
Parameter
SUPPLY
V
CC
Operating Voltage Range
Supply Current
RESET THRESHOLD VOLTAGE
V
TH
−
1.5%
V
TH
−
2.5%
RESET THRESHOLD TEMPERATURE COEFFICIENT
RESET THRESHOLD HYSTERESIS
RESET TIMEOUT PERIOD
ADM63__A
ADM63__B
ADM63__C
ADM63__D
V
CC
TO RESET DELAY
PUSH-PULL OUTPUT (ADM6316, ADM6317, ADM6318,
ADM6319, ADM6321, ADM6322)
RESET Output Voltage
V
TH
V
TH
40
3
1
20
140
1120
1.4
28
200
1600
40
2
40
280
2240
V
TH
+
1.5%
V
TH
+
2.5%
V
V
ppm/°C
mV
ms
ms
ms
ms
µs
T
A
= +25°C
T
A
= −40°C to +85°C
Min
1
10
5
Typ
Max
5.5
20
12
Unit
V
µA
µA
Test Conditions/Comments
V
CC
= 5.5 V
V
CC
= 3.6 V
V
CC
falling at 1 mV/µs
0.3
0.3
0.3
0.4
0.8 × V
CC
V
CC
− 1.5
RESET Rise Time
RESET Output Voltage
0.8 × V
CC
0.8 × V
CC
V
CC
– 1.5
OPEN-DRAIN OUTPUT (ADM6320, ADM6321,
ADM6322)
RESET Output Voltage
5
25
0.3
0.4
V
V
V
V
V
V
ns
V
V
V
V
V
CC
> = 1.0 V, I
SINK
= 50 µA
V
CC
> = 1.2 V, I
SINK
= 100 µA
V
CC
> = 2.7 V, I
SINK
= 1.2 mA
V
CC
> = 4.5 V, I
SINK
= 3.2 mA
V
CC
> = 2.7 V, I
SOURCE
= 500 µA
V
CC
> = 4.5 V, I
SOURCE
= 800 µA
From 10% to 90% V
CC
, C
L
= 5 pF,
V
CC
= 3.3 V
V
CC
> = 2.7 V, I
SINK
= 1.2 mA
V
CC
> = 4.5 V, I
SINK
= 3.2 mA
V
CC
> = 1.8 V, I
SOURCE
= 150 µA
V
CC
> = 2.7 V, I
SOURCE
= 500 µA
V
CC
> = 4.5 V, I
SOURCE
= 800 µA
Open-Drain Reset Output Leakage Current
WATCHDOG INPUT (ADM6316, ADM6317, ADM6318,
ADM6320, ADM6321)
Watchdog Timeout Period
0.3
0.3
0.3
0.4
1
V
V
V
V
µA
V
CC
> = 1.0 V, I
SINK
= 50 µA
V
CC
> = 1.2 V, I
SINK
= 100 µA
V
CC
> = 2.7 V, I
SINK
= 1.2 mA
V
CC
> = 4.5 V, I
SINK
= 3.2 mA
WDI Pulse Width
4.3
71
1.12
17.9
50
6.3
102
1.6
25.6
9.3
153
2.4
38.4
ms
ms
s
s
ns
ADM63___W
ADM63___X
ADM63___Y
ADM63___Z
V
IL
= 0.3 × V
CC
, V
IH
= 0.7 × V
CC
,
Rev.PrC | Page 3 of 11
PRELIMINARY TECHNICAL DATA
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
Parameter
WDI Input Threshold
WDI Input Current
−20
MANUAL RESET INPUT (ADM6316, ADM6317,
ADM6319, ADM6320, ADM6322)
MR Input Threshold
Min
0.3 × V
CC
Typ
Max
0.7 × V
CC
160
Unit
V
V
µA
µA
Test Conditions/Comments
120
−15
V
WDI
= V
CC
, time average
V
WDI
= 0, time average
0.8
2.0
0.3 × V
CC
0.7 × V
CC
MR Input Pulse Width
MR Glitch Rejection
MR Pull-up Resistance
MR to Reset Delay
1
35
100
52
230
75
V
V
V
V
µs
ns
k
ns
V
TH
> 4.0 V
V
TH
> 4.0 V
V
TH
<4.0 V
V
TH
< 4.0 V
V
CC
= 5V
Rev.PrC | Page 4 of 11
PRELIMINARY TECHNICAL DATA
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
ABSOLUTE MAXIMUM RATINGS
T
A
= 25°C, unless otherwise noted.
Table 3.
Parameter
V
CC
RESET (ADM6320, ADM6321, ADM6322)
Output Current (RESET, RESET)
Operating Temperature Range
Storage Temperature Range
θ
JA
Thermal Impedance, SOT-23
Lead Temperature
Soldering (10 sec)
Vapour Phase (60 sec)
Infrared (15 sec)
Rating
–0.3 V to +6 V
–0.3 V to +6 V
20 mA
–40°C to +85°C
–65°C to +125°C
270°C/W
300°C
215°C
220°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only and 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.
Rev.PrC | Page 5 of 11
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