ADM8616

Data Sheet Low Voltage Supervisory Circuits with Watchdog Timer in 4-Lead SC70 ADM8616/ADM8617 FEATURES Precision 1.8 V to 5 V power supply monitoring 9 RESET threshold options 1.58 V to 4.63 V 4 RESET timeout options 1 ms, 20 ms, 140 ms, 1120 ms 3 watchdog timeout options 6.3 ms, 102 ms, 1.6 sec RESET output stages Push-pull active-low (ADM8616) Open-drain active-low (ADM8617) Low power consumption (5 μA) Guaranteed reset output valid to VCC = 1 V Power supply glitch immunity Specified over −40°C to +85°C temperature range 4-lead SC70 package APPLICATIONS Microprocessor systems Computers Controllers Intelligent instruments Portable equipment GENERAL DESCRIPTION The ADM8616/ADM8617 are supervisory circuits that monitor power supply voltage levels and code execution integrity in microprocessor-based systems. A power-on reset signal generates when the supply voltage rises to a preset threshold level. The ADM8616/ ADM8617 have an on-chip watchdog timer that can reset the microprocessor if it fails to strobe within a preset timeout period. Each part is available in the following nine reset threshold options: 1.58 V, 1.67 V, 2.19 V, 2.32 V, 2.63 V, 2.93 V, 3.08 V, 4.38 V, and 4.63 V. There are four reset timeout options: 1 ms, 20 ms, 140 ms, and 1120 ms. There are also three possible watchdog timeouts available: 6.3 ms, 102 ms, and 1.6 sec. Not all device options are released for sale as standard models. See the Ordering Guide for details. FUNCTIONAL BLOCK DIAGRAM ADM8616 VCC...