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ADM6316 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer ADM6316
Beschreibung Supervisory Circuits with Watchdog and Manual Reset
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 16 Seiten
ADM6316 Datasheet, Funktion
Data Sheet
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 (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
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
Watchdog
Yes
Yes
Yes
No
Yes
Yes
No
Manual Reset
Yes
Yes
No
Yes
Yes
No
Yes
FUNCTIONAL BLOCK DIAGRAMS
ADM6316
VCC
VREF
RESET
GENERATOR
VCC
RESET
MR DEBOUNCE
WATCHDOG
DETECTOR
GND
ADM6320
WDI
Figure 1.
VCC
VREF
MR DEBOUNCE
RESET
GENERATOR
WATCHDOG
DETECTOR
RESET
GND
WDI
Figure 2.
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.
RESET
Push-pull
No
Push-pull
Push-pull
Open-drain
Open-drain
Open-drain
Output Stage
RESET
No
Push-pull
Push-pull
Push-pull
No
Push-pull
Push-pull
Rev. F
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Tel: 781.329.4700 ©2004–2013 Analog Devices, Inc. All rights reserved.
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ADM6316 Datasheet, Funktion
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322 Data Sheet
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
RESET 1
5 VCC
ADM6316/
ADM6320
GND 2 TOP VIEW
(Not to Scale)
MR 3
4 WDI
Figure 3. ADM6316/ADM6320 Pin Configuration
RESET 1
5 VCC
ADM6318/
ADM6321
GND 2 TOP VIEW
(Not to Scale)
RESET 3
4 WDI
Figure 5. ADM6318/ADM6321 Pin Configuration
RESET 1
5 VCC
ADM6317
GND 2 TOP VIEW
(Not to Scale)
MR 3
4 WDI
Figure 4. ADM6317 Pin Configuration
RESET 1
5 VCC
ADM6319/
ADM6322
GND 2 TOP VIEW
(Not to Scale)
RESET 3
4 MR
Figure 6. ADM6319/ADM6322 Pin Configuration
Table 4. Pin Function Descriptions
Pin No. Mnemonic
1 RESET (ADM6316/ADM6318/ADM6319/
ADM6320/ADM6321/ADM6322)
RESET (ADM6317)
2 GND (all models)
3 MR (ADM6316/ADM6317/ADM6320)
RESET (ADM6318/ADM6319/ADM6321/ADM6322)
4 WDI (ADM6316/ADM6317/ADM6318/
ADM6320/ADM6321)
MR (ADM6319/ADM6322)
5 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. F | Page 6 of 16

6 Page









ADM6316 pdf, datenblatt
ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322 Data Sheet
Table 8. Standard Models
Model
ADM6316CW25-ARJZ-R7
ADM6316DZ26-ARJ-RL7
ADM6316DZ26-ARJZ-R7
ADM6316AY27-ARJZ-R7
ADM6316AY29-ARJZ-R7
ADM6316AZ29ARJZ-R7
ADM6316CY29-ARJ-RL7
ADM6316CY29-ARJZ-R7
ADM6316BX30-ARJZ-R7
ADM6316DZ31-ARJ-RL7
ADM6316DZ31-ARJZ-R7
ADM6316BX46-ARJZ-R7
ADM6316CY26ARJZ-R7
ADM6316CY46-ARJ-RL7
ADM6316CY46-ARJZ-R7
ADM6318CZ28-ARJ-RL7
ADM6318CZ28-ARJZ-R7
ADM6318CY29-ARJZ-R7
ADM6318CY45-ARJZ-R7
ADM6318CY46-ARJ-RL7
ADM6318CY46-ARJZ-R7
ADM6318BX49-ARJZ-R7
ADM6319C29-ARJ-RL7
ADM6319C29-ARJZ-RL7
ADM6319B25ARJZ-R7
ADM6319B31-ARJZ-RL7
ADM6319C46-ARJ-RL7
ADM6319C46-ARJZ-RL7
ADM6320CZ27-ARJZ-R7
ADM6320CX29-ARJZ-R7
ADM6320CY29-ARJ-RL7
ADM6320CY29-ARJZ-R7
ADM6320CZ29-ARJ-RL7
ADM6320CZ29-ARJZ-R7
ADM6320BX33-ARJZ-R7
ADM6320CW33-ARJZ-R7
ADM6320BX45-ARJZ-R7
ADM6320CY46-ARJ-RL7
ADM6320CY46-ARJZ-R7
ADM6321BZ25-ARJZ-R7
ADM6321AY30ARJZ-R7
ADM6321AY31ARJZ-R7
ADM6321AY43-ARJZ-R7
ADM6321CY46-ARJ-RL7
ADM6321CY46-ARJZ-R7
ADM6322C29ARJZ-RL7
ADM6322C46-ARJ-RL7
ADM6322C46-ARJZ-RL7
Reset Threshold (V)
2.5
2.63
2.63
2.7
2.93
2.93
2.93
2.93
3
3.08
3.08
4.63
2.63
4.63
4.63
2.8
2.8
2.93
4.5
4.63
4.63
4.9
2.93
2.93
2.5
3.08
4.63
4.63
2.7
2.93
2.93
2.93
2.93
2.93
3.3
3.3
4.5
4.63
4.63
2.5
3
3.08
4.3
4.63
4.63
2.93
4.63
4.63
Minimum Reset Timeout (ms)
140
1120
1120
1
1
1
140
140
20
1120
1120
20
140
140
140
140
140
140
140
140
140
20
140
140
20
20
140
140
140
140
140
140
140
140
140
20
20
140
140
20
1
1
1
140
140
140
140
140
Typical Watchdog Timeout (sec)
0.0063
25.6
25.6
1.6
1.6
25.6
1.6
1.6
0.102
25.6
25.6
0.102
1.6
1.6
1.6
25.6
25.6
1.6
1.6
1.6
1.6
0.102
N/A
N/A
n/A
N/A
N/A
N/A
25.6
0.102
1.6
1.6
25.6
25.6
0.102
0.0063
0.102
1.6
1.6
25.6
1.6
1.6
1.6
1.6
1.6
N/A
N/A
N/A
Rev. F | Page 12 of 16

12 Page





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