AD ADM6318 Supervisory circuits with watchdog and manual reset in 5-lead sot-23 Datasheet

PRELIMINARY TECHNICAL DATA
Supervisory Circuits with Watchdog
and Manual Reset in 5-Lead SOT-23
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
FEATURES
FUNCTIONAL BLOCK DIAGRAM
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
ADM6316
VCC
RESET
GENERATOR
VREF
MR
VCC
RESET
DEBOUNCE
GND
04533-0-001
WATCHDOG
DETECTOR
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.
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.
ADM6316
ADM6317
ADM6318
ADM6319
ADM6320
ADM6321
ADM6322
Watchdog
Yes
Yes
Yes
–
Yes
Yes
–
Manual Reset
Yes
Yes
–
Yes
Yes
Yes
RESET
RESET
Push-Pull
–
Push-Pull
Push-Pull
Open-Drain
Open-Drain
Open-Drain
–
Push-Pull
Push-Pull
Push-Pull
–
Push-Pull
Push-Pull
Rev.PrC
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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.
PRELIMINARY TECHNICAL DATA
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
TABLE OF CONTENTS
Specifications..................................................................................... 3
Typical Performance Characteristics ..............................................7
Absolute Maximum Ratings............................................................ 5
Outline Dimensions ....................................................................... 10
ESD Caution.................................................................................. 5
Ordering Guide .......................................................................... 11
Pin Configurations and Function Descriptions ........................... 6
Rev.PrC | Page 2 of 11
PRELIMINARY TECHNICAL DATA
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
Min
Typ
Max
Unit
Test Conditions/Comments
10
5
5.5
20
12
V
µA
µA
VCC = 5.5 V
VCC = 3.6 V
VTH +
1.5%
VTH +
2.5%
V
TA = +25°C
V
TA = −40°C to +85°C
1
RESET THRESHOLD VOLTAGE
VTH −
1.5%
VTH −
2.5%
RESET THRESHOLD TEMPERATURE COEFFICIENT
RESET THRESHOLD HYSTERESIS
RESET TIMEOUT PERIOD
ADM63__A
ADM63__B
ADM63__C
ADM63__D
VCC TO RESET DELAY
PUSH-PULL OUTPUT (ADM6316, ADM6317, ADM6318,
ADM6319, ADM6321, ADM6322)
RESET Output Voltage
VTH
VTH
40
3
1
20
140
1120
1.4
28
200
1600
40
ppm/°C
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 Period
WDI Pulse Width
4.3
71
1.12
17.9
50
6.3
102
1.6
25.6
Rev.PrC | Page 3 of 11
V
V
V
V
V
V
ns
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, I SOURCE = 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, I SOURCE = 800 µA
0.3
0.4
V
V
V
V
0.3
0.3
0.3
0.4
1
V
V
V
V
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
9.3
153
2.4
38.4
ms
ms
s
s
ns
ADM63___W
ADM63___X
ADM63___Y
ADM63___Z
VIL = 0.3 × VCC, VIH = 0.7 × VCC,
0.8 × VCC
0.8 × VCC
VCC – 1.5
OPEN-DRAIN OUTPUT (ADM6320, ADM6321,
ADM6322)
RESET Output Voltage
ms
ms
ms
ms
µs
PRELIMINARY TECHNICAL DATA
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
Parameter
WDI Input Threshold
Min
0.3 × VCC
WDI Input Current
−20
MANUAL RESET INPUT (ADM6316, ADM6317,
ADM6319, ADM6320, ADM6322)
MR Input Threshold
Typ
120
−15
Max
0.7 × VCC
160
0.8
2.0
0.3 × VCC
0.7 × VCC
MR Input Pulse Width
MR Glitch Rejection
MR Pull-up Resistance
MR to Reset Delay
1
35
100
52
230
Rev.PrC | Page 4 of 11
75
Unit
V
V
µA
µA
V
V
V
V
µs
ns
k⍀
ns
Test Conditions/Comments
VWDI = VCC, time average
VWDI = 0, time average
VTH > 4.0 V
VTH > 4.0 V
VTH <4.0 V
VTH < 4.0 V
VCC = 5V
PRELIMINARY TECHNICAL DATA
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Table 3.
Parameter
VCC
RESET (ADM6320, ADM6321, ADM6322)
Output Current (RESET, RESET)
Operating Temperature Range
Storage Temperature Range
θJA 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
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.
300°C
215°C
220°C
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
PRELIMINARY TECHNICAL DATA
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
TOP VIEW
(Not to Scale)
GND 2
4
WDI
RESET 3
5
VCC
RESET 1
ADM6318/
ADM6321
TOP VIEW
(Not to Scale)
4
WDI
Figure 3. ADM6317 Pin Configuration
GND 2
4
WDI
04533-0-004
GND 2
VCC
TOP VIEW
(Not to Scale)
MR 3
Figure 2. ADM6316/ADM6320 Pin Configuration
RESET 1
5
ADM6317
04533-0-003
MR 3
RESET 1
VCC
04533-0-002
GND 2
5
ADM6316/
ADM6320
RESET 3
Figure 4. ADM6318/ADM6321 Pin Configuration
5
VCC
4
MR
ADM6319/
ADM6322
TOP VIEW
(Not to Scale)
04533-0-004
RESET 1
Figure 5. 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
MR (ADM6316/ADM6317/
ADM6320)
RESET (ADM6318/ADM6319/
ADM6321/ADM6322)
WDI
(ADM6316/ADM6317/
ADM6318/ADM6320/ADM6321)
MR (ADM6319/ADM6322)
VCC
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 which, when forced low for at least 1 µs,
generates a reset. It features a 52 k⍀ 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 floating to disable the watchdog timer.
Manual Reset Input.
Power Supply Voltage Being Monitored.
Rev.PrC | Page 6 of 11
PRELIMINARY TECHNICAL DATA
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
TYPICAL PERFORMANCE CHARACTERISTICS
10.0
100
9.5
90
9.0
80
VCC TO RESET DELAY (µs)
8.5
VCC = 5V
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
340
65
60
55
50
45
40
35
30
25
20
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
300
280
260
240
220
200
180
160
140
120
100
–40
04533-0-007
15
10
320
–20
0
20
40
TEMPERATURE (°C)
60
80
04533-0-010
MANUAL RESET TO RESET DELAY (ns)
75
70
ICC (µA)
40
Figure 9. VCC Falling to Reset Propagation Delay vs. Temperature
80
Figure 10. Manual Reset to Reset Propagation Delay vs. Temperature
(ADM6316/ADM6317/ADM6319/ADM6320/ADM6322)
Figure 7. 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
04533-0-008
NORMALIZED RESET THRESHOLD
50
0
–40
Figure 6. Supply Current vs. Temperature
(ADM6316/ADM6317/ADM6318/ADM6320/ADM6321)
5
0
60
10
04533-0-006
4.0
70
Figure 8. Normalized Reset Threshold vs. Temperature
0.80
–40
–20
0
20
40
TEMPERATURE (°C)
60
80
Figure 11. Normalized Reset Timeout Period vs. Temperature
Rev.PrC | Page 7 of 11
04533-0-011
ICC (µA)
7.5
04533-0-009
8.0
PRELIMINARY TECHNICAL DATA
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
190
1.20
MR MINIMUM PULSE WIDTH (ns)
1.10
1.05
1.00
0.95
160
150
140
130
120
0
20
40
TEMPERATURE (°C)
60
80
100
–50
Figure 12. Normalized Watchdog Timeout Period vs. Temperature
(ADM6316/ADM6317/ADM6318/ADM6320/ADM6321)
3.8
140
3.6
MINIMUM PULSE WIDTH (ns)
120
VTH = 4.9V
80
60
40
0
10
3.4
NEGATIVE PULSE
3.2
3.0
2.8
2.6
2.4
POSITIVE PULSE
2.2
VTH = 2.93V
100
OVER DRIVE VOD (mV)
1000
04533-0-013
20
50
Figure 14. Manual Reset Minimum Pulse Width vs. Temperature
(ADM6316/ADM6317/ADM6319/ADM6320/ADM6322)
160
100
0
TEMPERATURE (°C)
04533-0-014
–20
Figure 13. Maximum VCC Transient Duration vs. Reset Threshold Overdrive
Rev.PrC | Page 8 of 11
2.0
–40
10
TEMPERATURE (°C)
60
Figure 15. Watchdog Input Minimum Pulse Width vs. Temperature
(ADM6316/ADM6317/ADM6318/ADM6320/ADM6321)
04333-0-015
0.90
–40
MAXIMUM TRANSIENT DURATION (µs)
170
110
04533-0-012
NORMALIZED WATCHDOG TIMEOUT
180
1.15
PRELIMINARY TECHNICAL DATA
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
Table 5. Reset Threshold Options
Part No.
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
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
ADM63 _ _ _ 50
ADM63 _ _ _ 49
ADM63 _ _ _ 48
ADM63 _ _ _ 47
ADM63 _ _ _ 46
ADM63 _ _ _ 45
ADM63 _ _ _ 44
ADM63 _ _ _ 43
ADM63 _ _ _ 42
ADM63 _ _ _ 41
ADM63 _ _ _ 40
ADM63 _ _ _ 39
ADM63 _ _ _ 38
ADM63 _ _ _ 37
ADM63 _ _ _ 36
ADM63 _ _ _ 35
ADM63 _ _ _ 34
ADM63 _ _ _ 33
ADM63 _ _ _ 32
ADM63 _ _ _ 31
ADM63 _ _ _ 30
ADM63 _ _ _ 29
ADM63 _ _ _ 28
ADM63 _ _ _ 27
ADM63 _ _ _ 26
ADM63 _ _ _ 25
Table 6. Reset Timeout Options
Suffix
A
B
C
D
Min
1
20
140
1.12
Typ
1.6
30
200
1.60
TA = −40°C to +85°C
Min
Max
4.875
5.125
4.778
5.023
4.680
4.920
4.583
4.818
4.514
4.746
4.388
4.613
4.270
4.490
4.193
4.408
4.095
4.305
3.998
4.203
3.900
4.100
3.803
3.998
3.705
3.895
3.608
3.793
3.510
3.690
3.413
3.588
3.315
3.485
3.218
3.383
3.120
3.280
3.003
3.157
2.925
3.075
2.857
3.000
2.730
2.870
2.633
2.768
2.564
2.696
2.438
2.563
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
Table 7. Watchdog Timer Operations
Max
2
40
280
2.24
Unit
ms
ms
ms
s
Suffix
W
X
Y
Z
Min
4.3
71
1.12
17.9
Typ
6.3
102
1.6
25.6
Max
9.3
153
2.24
38.4
Unit
ms
ms
s
s
Table 8. Standard Models
Model
ADM6316CY29ARJ
ADM6316CY46ARJ
ADM6318CY46ARJ
ADM6319C46ARJ
ADM6320CY29ARJ
ADM6320CY46ARJ
ADM6321CY46ARJ
ADM6322C46ARJ
Reset Threshold (V)
2.93
4.63
4.63
4.63
2.93
4.63
4.63
4.63
Minimum Reset Timeout (ms)
140
140
140
140
140
140
140
140
Rev.PrC | Page 9 of 11
Typical Watchdog Timeout (s)
1.6
1.6
1.6
1.6
1.6
1.6
1.6
1.6
PRELIMINARY TECHNICAL DATA
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
OUTLINE DIMENSIONS
2.90 BSC
5
4
2.80 BSC
1.60 BSC
1
2
3
PIN 1
0.95 BSC
1.90
BSC
1.30
1.15
0.90
1.45 MAX
0.15 MAX
0.50
0.30
0.22
0.08
SEATING
PLANE
10°
5°
0°
COMPLIANT TO JEDEC STANDARDS MO-178AA
Figure 16. 5-Lead Small Outline Transistor Package [SOT-23]
(RJ-5)
Dimensions shown in millimeters
Rev.PrC | Page 10 of 11
0.60
0.45
0.30
PRELIMINARY TECHNICAL DATA
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322
ORDERING GUIDE
ADM63__ __ __ __ A RJ - __
Generic No.
Ordering Quantity:
(16 - 22)
RL7: 10,000 piece Reel
RL: 3,000 piece Reel
Reset Timeout Period
A: 1ms (min)
B: 20ms (min)
C: 140ms (min)
D: 1120ms (min)
Watchdog Timeout Period
W: 6.3ms (typ)
X: 102ms (typ)
Y: 1.6s (typ)
Z: 25s (typ)
Reset Threshold No.
(25 - 50)
Package Code:
RJ: 5-Lead SOT-23
Temperature Range:
A: -40°C
-40 CCto
A:
to +85
+85°C
Figure 17. Ordering Code Structure
Model12
ADM6316 _ _ __ ARJ-RL7
ADM6317 _ _ __ ARJ-RL7
ADM6318 _ _ __ ARJ-RL7
ADM6319 _ __ ARJ-RL7
ADM6320 _ _ __ ARJ-RL7
ADM6321 _ _ __ ARJ-RL7
ADM6322 _ __ ARJ-RL7
1
2
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
Quantity
3k
3k
3k
3k
3k
3k
3k
Package Option
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
Branding
N00
N01
N02
N03
N04
N05
N06
Complete the ordering code by inserting reset timeout, watchdog timeout (ADM6316/17/18/20/21) and reset threshold suffixes from tables 5 to 7.
Contact the factory for the availability of nonstandard models. See Table 8 for a list of standard models.
© 2004 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
PR04533-0-6/04(PrC)
Rev.PrC | Page 11 of 11
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