ADM6821(Rev0) View Datasheet(PDF) - Analog Devices

Part Name

Description

MFG CO.

ADM6821
(Rev.:Rev0)

Low Voltage Supervisory Circuits with Watchdog and Manual Reset in 5-Lead SOT-23

Analog Devices 

ADM6821/ADM6822/ADM6823/ADM6824/ADM6825

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS

RESET 1

5 VCC

ADM6821

GND 2 TOP VIEW

(Not to Scale)

MR 3

4 WDI

Figure 2. ADM6821 Pin Configuration

RESET 1

5 VCC

ADM6824

GND 2 TOP VIEW

(Not to Scale)

RESET 3

4 WDI

Figure 4. ADM6824 Pin Configuration

RESET 1

5 VCC

ADM6822/

GND 2 ADM6823

TOP VIEW

MR 3 (Not to Scale) 4 WDI

Figure 3. ADM6822/ADM6823 Pin Configuration

RESET 1

5 VCC

ADM6825

GND 2 TOP VIEW

(Not to Scale)

RESET 3

4 MR

Figure 5. ADM6825 Pin Configuration

Table 4. Pin Function Descriptions

Pin No. Name

1

RESET

(ADM6822/ADM6823/ADM6824/ADM6825)

RESET (ADM6821)

2

GND

3

MR (ADM6821/ADM6822/ADM6823)

RESET (ADM6824/ADM6825)

4

WDI

(ADM6821/ADM6822/ADM6823/ADM6824)

MR (ADM6825)

5

VCC

Description

Active-Low Reset Output. Asserted whenever VCC is below the reset threshold, VTH.

Open-Drain Output Stage for the ADM6822.

Push-Pull Output Stage for the ADM6823/ADM6824/ADM6825.

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 50 kΩ internal pull-up.

Active-High Push-Pull Reset Output.

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.

Power Supply Voltage Being Monitored.

Rev. 0 | Page 6 of 12

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