Part # ADM6821 AD6822 AD6823 AD6824 AD6825 datasheet

Part Manufacturer: Analog Devices

Analog Devices

Part Description: ADM6821/ADM6822/ADM6823/ADM6824/ADM6825 Low Voltage Supervisory Circuits with Watchdog and Manual Reset in 5-Lead SOT-23 Data Sh

Part Details:

Low Voltage Supervisory Circuits with Watchdog and Manual Reset in 5-Lead SOT-23 ADM6821/ADM6822/ADM6823/ADM6824/ADM6825 FEATURES FUNCTIONAL BLOCK DIAGRAM Precision low voltage monitoring 9 reset threshold options: 1.58 V to 4.63 V ADM6823 VCC 140 ms (min) reset timeout Watchdog timer with 1.6 sec timeout VCC RESET RESET GENERATOR Manual reset input VREF Reset output stages Push-pull active-low MR DEBOUNCE WATCHDOG Open-drain active-low DETECTOR Push-pull active-high Low power consumption (7 A) GND WDI 04535-001 Guaranteed reset output valid to VCC = 1 V Power supply glitch immunity Figure 1. Specified from -40°C to +125°C 5-lead SOT-23 package APPLICATIONS Microprocessor systems Computers Controllers Intelligent instruments Portable equipment GENERAL DESCRIPTION The ADM682x are supervisory circuits that monitor power Each part is available in nine reset threshold options, ranging supply voltage levels and code execution integrity in from 1.58 V to 4.63 V. The reset and watchdog timeout periods microprocessor-based systems. As well as providing power-on are fixed at 140 ms (min) and 1.6 sec (typ), respectively. reset signals, an on-chip watchdog timer can reset the microprocessor if it fails to strobe within a preset timeout The ADM682x are available in 5-lead SOT-23 packages and period. A reset signal can also be asserted by means of an typically consume only 7 A, making them suitable for use in external push-button through a manual reset input. The parts low power, portable applications. feature different combinations of watchdog input and manual reset input and output stage configurations, as shown in Table 1.

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ADM6821 AD6822 AD6823 AD6824 AD6825.pdf Datasheet