65°C trip point, active-low open-drain — what it means on the board
The ADT6501SRJZP065RL7 is a factory-programmed thermostat that asserts its output when the die temperature exceeds 65°C. The active-low open-drain output pulls low on an overtemperature event, so it can drive a logic input or a pull-up resistor without level-shifting. Supply voltage is 2.7 V minimum, and the output sinks up to 20 mA. That means it can directly drive a small relay or an optocoupler LED without a buffer transistor, as long as the pull-up voltage stays within the open-drain rating.
Active production — no end-of-life concern for this BOM line
Analog Devices lists the ADT6501SRJZP065RL7 as Active on the lifecycle record. No NRND or EOL notice is on file, so this part is still being manufactured and can be specified into new designs without a last-time-buy clock. Packaging options include Tape & Reel (TR) for automated pick-and-place and Cut Tape (CT) for prototype or low-volume builds. The SOT-23-5 footprint is a standard surface-mount package with a 0.95 mm pitch — no special layout considerations beyond the usual decoupling cap near the supply pin.
Drop-in with the 75°C sibling — same pinout, different trip point
The closest functional sibling is the ADT6501SRJZP075RL7, which shares the same pinout, package, supply voltage, and open-drain output but switches at 75°C with a ±6°C accuracy. If a board was laid out for the 75°C variant, the 65°C version drops in without rewiring — just a different trip threshold and tighter accuracy.