Three voltage rails, one supervisor — what the thresholds mean
The MAX6701YKA-T: This supervisor monitors three independent voltage rails: one fixed threshold at 2.19 V and two adjustable channels that let you set the trip point with an external resistor divider — useful when your board has a mix of fixed-core and variable-I/O supplies that need sequencing. The active-low reset output is push-pull (totem pole), so it drives the reset line cleanly without needing an external pull-up — one less resistor on the board. Reset timeout is a minimum of 140 ms, giving the downstream processor enough time to stabilise after the rails come up before it is released from reset.