Two-rail watchdog in a SOT-23-8
The MAX6705RKA+T is a multi-voltage supervisor from Analog Devices that keeps an eye on two supply rails — one fixed at 2.63V, the other adjustable via an external resistor divider — and pulls the reset output low when either dips below its threshold. The push-pull, totem-pole output holds reset active for a minimum of 140 ms after all rails recover, giving the system time to stabilize before the processor starts executing code. It's a compact supervisor for mixed-voltage boards where a single SOT-23-8 package replaces two separate reset ICs.
Temperature range and environment
Rated for -40°C to 125°C ambient, this supervisor handles industrial enclosures, outdoor telecom cabinets, and under-hood automotive environments without needing a higher-grade part. The SOT-23-8 footprint is hand-solderable with a fine tip and a steady hand — good for prototyping or low-volume builds where reflow isn't an option.
Lifecycle and sourcing
The MAX6705RKA+T is listed as Active in production with ROHS3 compliance. No end-of-life notice or last-time-buy window has been announced. For BOM planning, this part is sourced through independent distribution and quoted to order against an RFQ — availability and current pricing are confirmed at quote time.