Supervisory Circuits with Watchdog
and Manual Reset in 5-Lead SOT-23
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
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 (minimum)
4 watchdog timeout options
6.3 ms, 102 ms, 1600 ms, and 25.6 sec (typical)
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
ADM6316
VCC
VCC
RESET
GENERATOR
VREF
MR
RESET
DEBOUNCE
GND
04533-001
WATCHDOG
DETECTOR
WDI
Figure 1.
ADM6320
VCC
RESET
GENERATOR
VREF
APPLICATIONS
Microprocessor systems
Computers
Controllers
Intelligent instruments
Portable equipment
MR
RESET
DEBOUNCE
WATCHDOG
DETECTOR
GND
04533-028
Data Sheet
WDI
Figure 2.
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 devices feature different
combinations of watchdog input, manual reset input, and output
stage configuration, as shown in Table 1.
Each device 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). Not all device options are
released for sale as standard models. See the Ordering Guide for
details.
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.
Table 1. Selection Table
Output Stage
Part No.
ADM6316
ADM6317
ADM6318
ADM6319
ADM6320
ADM6321
ADM6322
Rev. I
Watchdog
Yes
Yes
Yes
No
Yes
Yes
No
Manual Reset
Yes
Yes
No
Yes
Yes
No
Yes
RESET
Push-pull
No
Push-pull
Push-pull
Open-drain
Open-drain
Open-drain
RESET
No
Push-pull
Push-pull
Push-pull
No
Push-pull
Push-pull
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ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Open-Drain RESET Output ........................................................9
Applications ....................................................................................... 1
Manual Reset Input .......................................................................9
Functional Block Diagrams ............................................................. 1
Watchdog Input .............................................................................9
General Description ......................................................................... 1
Applications Information .............................................................. 10
Revision History ............................................................................... 2
Watchdog Input Current ........................................................... 10
Specifications..................................................................................... 3
Negative Going VCC Transients................................................. 10
Absolute Maximum Ratings............................................................ 5
Ensuring Reset Valid to VCC = 0 V ........................................... 10
ESD Caution .................................................................................. 5
Watchdog Software Considerations ......................................... 10
Pin Configurations and Function Descriptions ........................... 6
Device Model Options ................................................................... 11
Typical Performance Characteristics ............................................. 7
Outline Dimensions ....................................................................... 13
Circuit Description ........................................................................... 9
Ordering Guide .......................................................................... 13
Reset Output ................................................................................. 9
REVISION HISTORY
3/2018—Rev. H to Rev. I
Changes to General Description Section ...................................... 1
Added Note 1, Table 2 ...................................................................... 3
Changed Model Options Section to Device Model Options
Section .............................................................................................. 11
Changes to Device Model Options Section and Table 5 ........... 11
Deleted Table 8; Renumbered Sequentially ................................ 12
Changes to Ordering Guide .......................................................... 13
1/2007—Rev. A to Rev. B
Changes to Functional Block Diagram...........................................1
Changes to Figure 18...................................................................... 10
12/2015—Rev. G to Rev. H
Added Endnote 1 and Endnote 2, Table 2 ..................................... 3
Change to Model Options Section Title ...................................... 11
Added Endnote 1, Table 5 ............................................................. 11
Changes to Table 8 .......................................................................... 12
Changes to Ordering Guide .......................................................... 14
5/2006—Rev. 0 to Rev. A
Updated Format .................................................................. Universal
Changes to Functional Block Diagram...........................................1
Changes to Table 8.......................................................................... 12
Changes to Figure 22...................................................................... 13
Changes to Ordering Guide .......................................................... 13
1/2015—Rev. F to Rev. G
Changes to Table 8 .......................................................................... 12
10/2004—Revision 0: Initial Version
4/2007—Rev. B to Rev. C
Added Figure 2...................................................................................1
Changes to Figure 23...................................................................... 13
Changes to Ordering Guide .......................................................... 13
5/2013—Rev. E to Rev. F
Changes to Table 8 .......................................................................... 12
Changes to Ordering Guide .......................................................... 13
10/2010—Rev. D to Rev. E
Changes to Table 8 .......................................................................... 12
Updated Outline Dimensions ....................................................... 13
8/2008—Rev. C to Rev. D
Change to Figure 18 ......................................................................... 9
Rev. I | Page 2 of 14
Data Sheet
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
SPECIFICATIONS
VCC = full operating range, TA = TMIN to TMAX, unless otherwise noted.
Table 2.
Parameter
SUPPLY
VCC Operating Voltage Range
Supply Current
RESET THRESHOLD VOLTAGE 1
RESET THRESHOLD TEMPERATURE
COEFFICIENT
RESET THRESHOLD HYSTERESIS
RESET TIMEOUT PERIOD1
ADM63xxA 2
ADM63xxB2
ADM63xxC2
ADM63xxD2
VCC TO RESET DELAY
PUSH-PULL OUTPUT (ADM6316, ADM6317,
ADM6318, ADM6319, ADM6321, ADM6322)
RESET Output Voltage
Min
Typ
1
VTH − 1.5%
VTH − 2.5%
10
5
VTH
VTH
40
Max
Unit
Test Conditions/Comments
5.5
20
12
VTH + 1.5%
VTH + 2.5%
V
µA
µA
V
V
ppm/°C
VCC = 5.5 V
VCC = 3.6 V
TA = 25°C
TA = −40°C to +85°C
3
1
20
140
1120
1.4
28
200
1600
40
mV
2
40
280
2240
0.3
0.3
0.3
0.4
0.8 × VCC
VCC − 1.5
5
RESET Rise Time
RESET Output Voltage
25
Open-Drain Reset Output Leakage Current
WATCHDOG INPUT (ADM6316, ADM6317,
ADM6318, ADM6320, ADM6321)
Watchdog Timeout Period1
ADM63xxxW 3
ADM63xxxX3
ADM63xxxY3
ADM63xxxZ3
WDI Pulse Width
WDI Input Threshold
WDI Input Current
4.3
71
1.12
17.9
50
0.3 × VCC
−20
6.3
102
1.6
25.6
120
−15
V
V
V
V
V
V
ns
0.3
0.4
V
V
V
V
V
0.3
0.3
0.3
0.4
1
V
V
V
V
µA
9.3
153
2.4
38.4
ms
ms
sec
sec
ns
V
µA
µA
0.8 × VCC
0.8 × VCC
VCC − 1.5
OPEN-DRAIN OUTPUT (ADM6320, ADM6321,
ADM6322)
RESET Output Voltage
ms
ms
ms
ms
µs
0.7 × VCC
160
Rev. I | Page 3 of 14
VCC falling at 1 mV/µs
VCC ≥ 1.0 V, ISINK = 50 µA
VCC ≥ 1.2 V, ISINK = 100 µA
VCC ≥ 2.7 V, ISINK = 1.2 mA
VCC ≥ 4.5 V, ISINK = 3.2 mA
VCC ≥ 2.7 V, ISOURCE = 500 µA
VCC ≥ 4.5 V, ISOURCE = 800 µA
From 10% to 90% VCC, CL = 5 pF,
VCC = 3.3 V
VCC ≥ 2.7 V, ISINK = 1.2 mA
VCC ≥ 4.5 V, ISINK = 3.2 mA
VCC ≥ 1.8 V, ISOURCE = 150 µA
VCC ≥ 2.7 V, ISOURCE = 500 µA
VCC ≥ 4.5 V, ISOURCE = 800 µA
VCC ≥ 1.0 V, ISINK = 50 µA
VCC ≥ 1.2 V, ISINK = 100 µA
VCC ≥ 2.7 V, ISINK = 1.2 mA
VCC ≥ 4.5 V, ISINK = 3.2 mA
VIL = 0.3 × VCC, VIH = 0.7 × VCC
VWDI = VCC, time average
VWDI = 0, time average
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
0.8
0.3 × VCC
1
35
100
52
230
Data Sheet
Max
Unit
Test Conditions/Comments
2.0
0.7 × VCC
V
V
µs
ns
kΩ
ns
VTH > 4.0 V
VTH < 4.0 V
75
Not all device options are released for sale as standard models. See the Ordering Guide for full details.
Complete the model code by replacing xx with a device generic number.
3
Complete the model code by replacing xxx with a device generic number and code for the reset timeout period.
1
2
Rev. I | Page 4 of 14
VCC = 5 V
Data Sheet
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Table 3.
Parameter
VCC
RESET (ADM6320, ADM6321, ADM6322)
All Other Pins
Output Current (RESET, RESET)
Operating Temperature Range
Storage Temperature Range
θJA Thermal Impedance, SOT-23
Lead Temperature
Soldering (10 sec)
Vapor Phase (60 sec)
Infrared (15 sec)
Rating
−0.3 V to +6 V
−0.3 V to +6 V
−0.3 V to (VCC + 0.3 V)
20 mA
−40°C to +85°C
−65°C to +125°C
270°C/W
Stresses at or above those listed under Absolute Maximum
Ratings may cause permanent damage to the product. This is a
stress rating only; functional operation of the product at these
or any other conditions above those indicated in the operational
section of this specification is not implied. Operation beyond
the maximum operating conditions for extended periods may
affect product reliability.
ESD CAUTION
300°C
215°C
220°C
Rev. I | Page 5 of 14
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
Data Sheet
5
GND 2
TOP VIEW
(Not to Scale)
MR 3
RESET 1
VCC
4
WDI
RESET 1
VCC
ADM6317
TOP VIEW
(Not to Scale)
MR 3
GND 2
4
WDI
VCC
4
WDI
Figure 5. ADM6318/ADM6321 Pin Configuration
04533-003
GND 2
5
5
TOP VIEW
(Not to Scale)
RESET 3
Figure 3. ADM6316/ADM6320 Pin Configuration
RESET 1
ADM6318/
ADM6321
RESET 3
Figure 4. ADM6317 Pin Configuration
ADM6319/
ADM6322
5
VCC
4
MR
TOP VIEW
(Not to Scale)
04533-005
GND 2
ADM6316/
ADM6320
04533-002
RESET 1
04533-004
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
Figure 6. ADM6319/ADM6322 Pin Configuration
Table 4. Pin Function Descriptions
Pin No.
1
2
3
4
5
Mnemonic
RESET (ADM6316/ADM6318/ADM6319/
ADM6320/ADM6321/ADM6322)
RESET (ADM6317)
GND (all models)
MR (ADM6316/ADM6317/ADM6320)
RESET (ADM6318/ADM6319/ADM6321/ADM6322)
WDI (ADM6316/ADM6317/ADM6318/
ADM6320/ADM6321)
MR (ADM6319/ADM6322)
VCC (all models)
Description
Active Low Reset Output. Asserted whenever VCC is below the reset
threshold, VTH.
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.
Active High Push-Pull Reset Output.
Watchdog Input. Generates a reset if the logic level on the pin remains low
or high for the duration of the watchdog timeout. The timer is cleared if a
logic transition occurs on this pin or if a reset is generated. Leave this pin
floating to disable the watchdog timer.
Manual Reset Input.
Power Supply Voltage Being Monitored.
Rev. I | Page 6 of 14
Data Sheet
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
TYPICAL PERFORMANCE CHARACTERISTICS
10.0
100
9.5
90
9.0
VCC TO RESET DELAY (µs)
80
VCC = 5V
8.0
7.0
6.5
6.0
VCC = 3V
5.5
5.0
4.5
VCC = 1.5V
3.5
–40
–20
0
20
40
TEMPERATURE (°C)
60
80
30
20
–20
0
20
40
TEMPERATURE (°C)
60
80
0
0.5
1.0
1.5
2.0
2.5 3.0
VCC (V)
3.5
4.0
4.5
5.0
5.5
320
300
280
260
240
220
200
180
160
140
120
100
–40
–20
0
20
40
TEMPERATURE (°C)
60
80
04533-010
MANUAL RESET TO RESET DELAY (ns)
340
04533-007
ICC (µA)
40
Figure 10. VCC Falling to Reset Propagation Delay vs. Temperature
Figure 11. Manual Reset to Reset Propagation Delay vs. Temperature
(ADM6316/ADM6317/ADM6319/ADM6320/ADM6322)
Figure 8. Supply Current vs. Supply Voltage
1.05
1.20
1.04
1.15
NORMALIZED RESET TIMEOUT
1.03
1.02
1.01
1.00
0.99
0.98
0.97
1.10
1.05
1.00
0.95
0.90
0.85
0.96
0.95
–40
–20
0
20
40
TEMPERATURE (°C)
60
80
0.80
–40
04533-008
NORMALIZED RESET THRESHOLD
50
0
–40
Figure 7. Supply Current vs. Temperature
(ADM6316/ADM6317/ADM6318/ADM6320/ADM6321)
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
60
10
04533-006
4.0
70
–20
0
20
40
TEMPERATURE (°C)
60
80
Figure 12. Normalized Reset Timeout Period vs. Temperature
Figure 9. Normalized Reset Threshold vs. Temperature
Rev. I | Page 7 of 14
04533-011
ICC (µA)
7.5
04533-009
8.5
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
190
180
MR MINIMUM PULSE WIDTH (ns)
1.15
1.10
1.05
1.00
0.95
–20
0
20
40
TEMPERATURE (°C)
60
80
140
130
120
0
TEMPERATURE (°C)
50
Figure 15. Manual Reset Minimum Pulse Width vs. Temperature
(ADM6316/ADM6317/ADM6319/ADM6320/ADM6322)
3.8
RESET OCCURS ABOVE CURVE
3.6
140
MINIMUM PULSE WIDTH (ns)
120
VTH = 4.63V
80
60
40
NEGATIVE PULSE
3.2
3.0
2.8
2.6
2.4
POSITIVE PULSE
1000
2.0
–40
Figure 14. Maximum VCC Transient Duration vs. Reset
Threshold Overdrive
10
TEMPERATURE (°C)
60
04533-015
100
OVERDRIVE VOLTAGE (mV)
3.4
2.2
VTH = 2.93V
04533-013
MAXIMUM TRANSIENT DURATION (µs)
160
0
10
150
100
–50
Figure 13. Normalized Watchdog Timeout Period vs. Temperature
(ADM6316/ADM6317/ADM6318/ADM6320/ADM6321)
20
160
04533-014
0.90
–40
100
170
110
04533-012
NORMALIZED WATCHDOG TIMEOUT
1.20
Data Sheet
Figure 16. Watchdog Input Minimum Pulse Width vs. Temperature
(ADM6316/ADM6317/ADM6318/ADM6320/ADM6321)
Rev. I | Page 8 of 14
Data Sheet
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
CIRCUIT DESCRIPTION
RESET OUTPUT
The ADM6316 features an active low push-pull reset output,
while the ADM6317/ADM6321/ADM6322 have active high
push-pull reset outputs. The ADM6318/ADM6319 feature dual
active low and active high push-pull reset outputs. For active
low and active high outputs, the reset signal is guaranteed to be
logic low and logic high, respectively, for VCC down to 1 V.
The reset output is asserted when VCC is below the reset threshold (VTH), when MR is driven low, or when WDI is not serviced
within the watchdog timeout period (tWD). Reset remains asserted
for the duration of the reset active timeout period (tRP) after VCC
rises above the reset threshold, after MR transitions from low to
high, or after the watchdog timer times out. Figure 17 illustrates
the behavior of the reset outputs.
VCC
VCC
VTH
VTH
1V
0V
MANUAL RESET INPUT
The ADM6316/ADM6317/ADM6319/ADM6320/ADM6322
feature a manual reset input (MR), which when driven low, asserts
the reset output. When MR transitions from low to high, reset
remains asserted for the duration of the reset active timeout
period before deasserting. The MR input has a 52 kΩ, internal
pull-up so that the input is always high when unconnected. An
external push-button switch can be connected between MR and
ground so that the user can generate a reset. Debounce circuitry
for this purpose is integrated on chip. Noise immunity is provided
on the MR input, and fast, negative going transients of up to 100
ns (typical) are ignored. A 0.1 μF capacitor between MR and
ground provides additional noise immunity.
WATCHDOG INPUT
The ADM6316/ADM6317/ADM6318/ADM6320/ADM6321
feature a watchdog timer that monitors microprocessor activity.
A timer circuit is cleared with every low-to-high or high-to-low
logic transition on the watchdog input pin (WDI), which detects
pulses as short as 50 ns. If the timer counts through the preset
watchdog timeout period (tWD), reset is asserted. The microprocessor is required to toggle the WDI pin to avoid being reset.
Failure of the microprocessor to toggle WDI within the timeout
period, therefore, indicates a code execution error, and the reset
pulse generated restarts the microprocessor in a known state.
As well as logic transitions on WDI, the watchdog timer is also
cleared by a reset assertion due to an undervoltage condition on
VCC or due to MR being pulled low. When reset is asserted, the
watchdog timer is cleared and does not begin counting again until
reset deasserts. The watchdog timer can be disabled by leaving
WDI floating or by three-stating the WDI driver.
VCC
VCC
tRP
tRD
0V
RESET
RESET
VCC
1V
0V
tRP
tRD
1V
0V
VCC
0V
04533-019
RESET
VCC
WDI
VTH
tRP
tWD
VCC
0V
Figure 17. Reset Timing Diagram
Figure 18. Watchdog Timing Diagram
OPEN-DRAIN RESET OUTPUT
The ADM6320/ADM6321/ADM6322 have an active low, opendrain reset output. This output structure requires an external
pull-up resistor to connect the reset output to a voltage rail no
higher than 6 V. The resistor must comply with the microprocessor’s logic low and logic high voltage level requirements
while supplying input current and leakage paths on the RESET
line. A 10 kΩ resistor is adequate in most situations.
Rev. I | Page 9 of 14
tRP
04533-022
The ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/
ADM6321/ADM6322 provide microprocessor supply voltage
supervision by controlling the reset input of the microprocessor.
Code execution errors are avoided during power-up, power-down,
and brownout conditions by asserting a reset signal when the
supply voltage is below a preset threshold and by allowing supply
voltage stabilization with a fixed timeout reset pulse after the
supply voltage rises above the threshold. 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.
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
Data Sheet
APPLICATIONS INFORMATION
WATCHDOG INPUT CURRENT
WATCHDOG SOFTWARE CONSIDERATIONS
To minimize watchdog input current (and minimize overall power
consumption), leave WDI low for the majority of the watchdog
timeout period. When driven high, WDI can draw as much as
160 µA. Pulsing WDI low-to-high-to-low at a low duty cycle
reduces the effect of the large input current. When WDI is
unconnected, a window comparator disconnects the watchdog
timer from the reset output circuitry so that reset is not asserted
when the watchdog timer times out.
In implementing the microprocessor’s watchdog strobe code,
quickly switching WDI low to high and then high to low (minimizing WDI high time) is desirable for current consumption
reasons. However, a more effective way of using the watchdog
function can be considered.
NEGATIVE GOING VCC TRANSIENTS
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 VCC
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 µs typically does not
cause a reset, but if the transient is any larger in magnitude or
duration, a reset is generated. An optional 0.1 µF bypass capacitor
mounted close to VCC provides additional glitch rejection.
A low-to-high-to-low WDI pulse within a given subroutine
prevents the watchdog from timing out. However, if the subroutine becomes stuck in an infinite loop, the watchdog cannot
detect this because the subroutine continues to toggle WDI. A
more effective coding scheme for detecting this error involves
using a slightly longer watchdog timeout. In the program that
calls the subroutine, WDI is set high. The subroutine sets WDI
low when it is called. If the program executes without error, WDI
is toggled high and low with every loop of the program. If the
subroutine enters an infinite loop, WDI is kept low, the watchdog
times out, and the microprocessor is reset (see Figure 20).
ENSURING RESET VALID TO VCC = 0 V
ADM6316/
ADM6318/
ADM6319
ADM6317/
ADM6318/
ADM6319/
ADM6321/
ADM6322
RESET
INFINITE LOOP:
WATCHDOG
TIMES OUT
SUBROUTINE
04533-021
SET WDI
LOW
RETURN
Figure 20. Watchdog Flow Diagram
VCC
RESET
100kΩ
ADM6316
MR
WDI
RESET
MICROPROCESSOR
I/O
RESET
04533-018
100kΩ
RESET
Figure 19. Ensuring Reset Valid to VCC = 0 V
Rev. I | Page 10 of 14
04533-020
VCC
SET WDI
HIGH
PROGRAM
CODE
Both active low and active high reset outputs are guaranteed to
be valid for VCC as low as 1 V. However, by using an external resistor
with push-pull configured reset outputs, valid outputs for VCC as
low as 0 V are possible. For an active low reset output, a resistor
connected between RESET and ground pulls the output low when
it is unable to sink current. For the active high case, a resistor
connected between RESET and VCC pulls the output high when it
is unable to source current. A large resistance, such as 100 kΩ,
must be used so that it does not overload the reset output when
VCC is above 1 V.
VCC
START
Figure 21. Typical Application Circuit
Data Sheet
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
DEVICE MODEL OPTIONS
The Watchdog Timers page on the ADI website also shows a list
of standard models. Contact a sales representative for information
on nonstandard models and be aware that samples and
production units have very long lead times.
The ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/
ADM6321/ADM6322 include many device options, however,
not all options are released for sale. Released options called
standard models and are listed in the Ordering Guide.
Table 5. Reset Voltage Threshold Options
Reset Threshold Number
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
Min
4.925
4.827
4.728
4.630
4.561
4.433
4.314
4.236
4.137
4.039
3.940
3.842
3.743
3.645
3.546
3.448
3.349
3.251
3.152
3.034
2.955
2.886
2.758
2.660
2.591
2.463
TA = +25°C
Typ
5.000
4.900
4.800
4.700
4.630
4.500
4.390
4.300
4.200
4.100
4.00
3.900
3.800
3.700
3.600
3.500
3.400
3.300
3.200
3.080
3.000
2.930
2.800
2.700
2.630
2.500
Max
5.075
4.974
4.872
4.771
4.699
4.568
4.446
4.365
4.263
4.162
4.060
3.959
3.857
3.756
3.654
3.553
3.451
3.350
3.248
3.126
3.045
2.974
2.842
2.741
2.669
2.538
Min
4.875
4.778
4.680
4.583
4.514
4.388
4.270
4.193
4.095
3.998
3.900
3.803
3.705
3.608
3.510
3.413
3.315
3.218
3.120
3.003
2.925
2.857
2.730
2.633
2.564
2.438
TA = −40°C to +85°C
Max
5.125
5.023
4.920
4.818
4.746
4.613
4.490
4.408
4.305
4.203
4.100
3.998
3.895
3.793
3.690
3.588
3.485
3.383
3.280
3.157
3.075
3.000
2.870
2.768
2.696
2.563
Table 6. Reset Timeout Options
Suffix
A
B
C
D
Min
1
20
140
1.12
Typ
1.6
30
200
1.60
Max
2
40
280
2.24
Unit
ms
ms
ms
sec
Typ
6.3
102
1.6
25.6
Max
9.3
153
2.24
38.4
Unit
ms
ms
sec
sec
Table 7. Watchdog Timer Options
Suffix
W
X
Y
Z
Min
4.3
71
1.12
17.9
Rev. I | Page 11 of 14
Unit
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
Data Sheet
ADM63 _ _ _ _ARJ_-_
ORDERING QUANTITY
RL7: 3000 PIECE REEL
R7: 3000 PIECE REEL RoHS COMPLIANT
GENERIC NUMBER
(16 TO 22)
Z: RoHS COMPLIANT
PACKAGE CODE
RJ: 5-LEAD SOT-23
WATCHDOG TIMEOUT PERIOD
W: 6.3ms (TYP)
X: 102ms (TYP)
Y: 1.6sec (TYP)
Z: 25.6sec (TYP)
TEMPERATURE RANGE
A: –40°C TO +85°C
RESET THRESHOLD NUMBER
(25 TO 50)
Figure 22. Ordering Code Structure (Modified Diagram)
Rev. I | Page 12 of 14
04533-024
RESET TIMEOUT PERIOD
A: 1ms (MIN)
B: 20ms (MIN)
C: 140ms (MIN)
D: 1120ms (MIN)
Data Sheet
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
OUTLINE DIMENSIONS
3.00
2.90
2.80
1.70
1.60
1.50
5
1
4
2
3.00
2.80
2.60
3
0.95 BSC
1.90
BSC
1.45 MAX
0.95 MIN
0.15 MAX
0.05 MIN
0.50 MAX
0.35 MIN
0.20 MAX
0.08 MIN
10°
5°
0°
SEATING
PLANE
0.60
BSC
0.55
0.45
0.35
11-01-2010-A
1.30
1.15
0.90
COMPLIANT TO JEDEC STANDARDS MO-178-AA
Figure 23. 5-Lead Small Outline Transistor Package [SOT-23]
(RJ-5)
Dimensions shown in millimeters
ORDERING GUIDE
Model1, 2, 3
ADM6316AY27ARJZ-R7
ADM6316AY29ARJZ-R7
ADM6316AZ29ARJZ-R7
ADM6316BX30ARJZ-R7
ADM6316BX46ARJZ-R7
ADM6316CW25ARJZ-R7
ADM6316CY26ARJZ-R7
ADM6316CY29ARJZ-R7
ADM6316CY46ARJZ-R7
ADM6316DZ26ARJ-RL7
ADM6316DZ26ARJZ-R7
ADM6316DZ31ARJZ-R7
ADM6317CY29ARJZ-R7
ADM6318BX49ARJZ-R7
ADM6318CY29ARJZ-R7
ADM6318CY46ARJ-RL7
ADM6318CY46ARJZ-R7
ADM6318CZ28ARJZ-R7
ADM6319B25ARJZ-R7
ADM6319B31ARJZ-RL7
ADM6319C29ARJZ-RL7
ADM6319C46ARJZ-RL7
ADM6320BX33ARJZ-R7
ADM6320BX45ARJZ-R7
ADM6320CX29ARJZ-R7
ADM6320CY29ARJ-RL7
ADM6320CY29ARJZ-R7
Reset
Voltage
Threshold (V)
2.7
2.93
2.93
3
4.63
2.5
2.63
2.93
4.63
2.63
2.63
3.08
2.93
4.9
2.93
4.63
4.63
2.8
2.5
3.08
2.93
4.63
3.3
4.5
2.93
2.93
2.93
Minimum
Reset
Timeout (ms)
1
1
1
20
20
140
140
140
140
1120
1120
1120
140
20
140
140
140
140
20
20
140
140
20
20
140
140
140
Typical
Watchdog
Timeout (sec)4
1.6
1.6
25.6
0.102
0.102
0.0063
1.6
1.6
1.6
25.6
25.6
25.6
1.6
0.102
1.6
1.6
1.6
25.6
N/A
N/A
N/A
N/A
0.102
0.102
0.102
1.6
1.6
Temperature
Range
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
Rev. I | Page 13 of 14
Package
Description
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
Package
Option
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
Ordering
Quantity
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
Marking
Code
M7Q
M7Q
M7Q
M7Q
M7Q
M7Q
M7Q
M7Q
M7Q
N00
M7Q
M7Q
M9N
M4Q
M4Q
N02
M4Q
M4Q
N0S
N0S
N0S
N0S
N0T
N0T
N0T
N04
N0T
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
Model1, 2, 3
ADM6320CY31ARJZ-R7
ADM6320CY46ARJZ-R7
ADM6320CZ27ARJZ-R7
ADM6320CZ29ARJ-RL7
ADM6320CZ29ARJZ-R7
ADM6321AX29ARJZ-R7
ADM6321AY30ARJZ-R7
ADM6321AY31ARJZ-R7
ADM6321AY43ARJZ-R7
ADM6321BZ25ARJZ-R7
ADM6321CY46ARJZ-R7
ADM6322C29ARJZ-R7
ADM6322C46ARJZ-RL7
Reset
Voltage
Threshold (V)
3.08
4.63
2.7
2.93
2.93
2.93
3
3.08
4.3
2.5
4.63
2.93
4.63
Minimum
Reset
Timeout (ms)
140
140
140
140
140
1
1
1
1
20
140
140
140
Typical
Watchdog
Timeout (sec)4
1.6
1.6
25.6
25.6
25.6
0.102
1.6
1.6
1.6
25.6
1.6
N/A
N/A
Temperature
Range
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
1
Package
Description
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
Package
Option
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
RJ-5
Data Sheet
Ordering
Quantity
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
Marking
Code
N0T
N0T
N0T
N04
N0T
M8L
M8L
M8L
M8L
M8L
M8L
M8J
M8J
Z = RoHS Compliant Part.
The ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322 include many device options, however, not all options are released for sale. Released
options called standard models and are listed in the Ordering Guide. The Watchdog Timers page on the ADI website also shows a list of standard models. Contact a
sales representative for information on nonstandard models and be aware that samples and production units have very long lead times.
3
If ordering nonstandard models, complete the ordering code (see Figure 22) by inserting the reset voltage threshold, reset timeout, and watchdog timer
(ADM6316/ADM6317/ADM6318/ADM6320/ADM6321) suffixes from Table 5 to Table 7. No watchdog timeout is available for ADM6319/ADM6322.
4
N/A means not applicable.
2
©2004–2018 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D04533-0-3/18(I)
Rev. I | Page 14 of 14
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