ADM823 Analog Devices, ADM823 Datasheet - Page 6

• Manufacturer Part Number: ADM823
• Description: Supervisory Circuit with Watchdog and Manual Reset in 5-Lead SC70 and SOT-23
• Manufacturer: Analog Devices

Specifications of ADM823

• Batt-backup-flg: No
• Manual Reset Capability: Yes
• Package: SC70,SOT
• Power Fail Indicator: No
• Reset Threshold Summary: 7 Options--2.19 to 4.63V
• Reset Output-stage: Active-Low/Push-Pull
• Min Reset Timeout (ms): 140
• Typ Watchdog Timeout (ms): 1600
• Watchdog Timer: Yes

ADM823/ADM824/ADM825
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
Table 4. Pin Function Descriptions
Pin No.
1
2
3
4
5
Figure 2. ADM823 Pin Configuration
RESET
Mnemonic
RESET
GND
MR (ADM823)
RESET (ADM824/ADM825)
WDI (ADM823/ADM824)
MR (ADM825)
V
GND
MR
CC
1
2
3
(Not to Scale)
ADM823
TOP VIEW
5
4
V
WDI
CC
Active High, Push-Pull Reset Output.
Description
Active Low, Push-Pull Reset Output. Asserted whenever V
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 kΩ internal pull-up.
Watchdog Input. Generates a reset if the voltage 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.
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 kΩ internal pull-up.
Power Supply Voltage Being Monitored.
Figure 3. ADM824 Pin Configuration
RESET
RESET
GND
Rev. C | Page 6 of 12
1
2
3
(Not to Scale)
ADM824
TOP VIEW
5
4
V
WDI
CC
CC
is below the reset threshold, V
Figure 4. ADM825 Pin Configuration
RESET
RESET
GND
1
2
3
(Not to Scale)
ADM825
TOP VIEW
5
4
V
MR
CC
TH
.