ADM6321 Series

Supervisory Circuit with Watchdog, Manual Reset, and Active-High/Push-Pull Active-Low/Open-Drain

Catalog

Supervisory Circuit with Watchdog, Manual Reset, and Active-High/Push-Pull Active-Low/Open-Drain

Part	Output	Voltage - Threshold	Reset	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Supplier Device Package	Package / Case	Number of Voltages Monitored	Type	Reset Timeout [Min]	Reset Timeout
Analog Devices ADM6321CY46ARJZ-R7	Open Drain Push-Pull	4.63 V	Active High/Active Low	85 °C	-40 °C	Surface Mount	SOT-23-5	SC-74A SOT-753	1	Simple Reset/Power-On Reset	140 ms
Analog Devices ADM6321BZ25ARJZ-R7	Open Drain Push-Pull	2.5 V	Active High/Active Low	85 °C	-40 °C	Surface Mount	SOT-23-5	SC-74A SOT-753	1	Simple Reset/Power-On Reset		20 ms
Analog Devices ADM6321AY43ARJZ-R7	Open Drain Push-Pull	4.3 V	Active High/Active Low	85 °C	-40 °C	Surface Mount	SOT-23-5	SC-74A SOT-753	1	Simple Reset/Power-On Reset		1 ms

Catalog

Supervisory Circuit with Watchdog, Manual Reset, and Active-High/Push-Pull Active-Low/Open-Drain

Key Features

• 26 reset threshold options2.5 V to 5 V in 100 mV increments

• 2.5 V to 5 V in 100 mV increments

• 4 reset timeout options1 ms, 20 ms, 140 ms, and 1120 ms (minimum)

• 1 ms, 20 ms, 140 ms, and 1120 ms (minimum)

• 4 watchdog timeout options6.3 ms, 102 ms, 1600 ms, and 25.6 sec (typical)

• 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

Description

TheADM6316/ADM6318/ADM6319/ADM6320/ ADM6321 /ADM6322are 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 of the data sheet.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 in the data sheet for details.The ADM6316/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.APPLICATIONSMicroprocessor systemsComputers and controllersIntelligent instrumentsPortable equipment