What this reset IC does and where it fits
The ADM1817-R23AKS-RL from Analog Devices is a simple reset/power-on reset IC that monitors a single supply voltage and asserts a reset signal when the voltage drops below its 2.31 V threshold. The reset output is active high with a push-pull, totem pole stage, so it drives a logic high during power-up, brown-out, and manual reset conditions. The reset timeout is a minimum of 100 ms, giving downstream microcontrollers, DSPs, or FPGAs time to stabilize before the reset de-asserts. Housed in a compact SC-70-3 (SOT-323) package, this part suits space-constrained boards in industrial control, telecom, or embedded systems where a dedicated supervisor is needed without the overhead of a multi-voltage sequencer.
2.31 V threshold — the so-what for your rail
The 2.31 V threshold is the trip point at which the reset asserts.
Active high output — confirm your logic polarity
The reset output is active high, meaning the pin goes high when the monitored voltage falls below threshold and stays high for the 100 ms timeout after the voltage recovers. Most microcontrollers expect an active low reset, so verify your processor's reset polarity before specifying this part. If your design uses an active low reset, the ADM1817-R23AKS-RL would need an inverter or a different part number in the ADM1817 family.
SC-70-3 package — board area and assembly
The SC-70-3 (SOT-323) package is a surface-mount package with three leads.
Sourcing and lifecycle
The ADM1817-R23AKS-RL carries an active product status from Analog Devices, with ROHS3 compliance.