What this reference is and where it fits
The Maxim Integrated MAX6045AEUR+T is a precision series voltage reference that delivers a fixed 4.5 V output with ±0.2% initial accuracy and a 20 ppm/°C temperature coefficient. It operates from a 4.7 V to 12.6 V input rail and supplies up to 500 µA to the load — enough to bias the reference input of a successive-approximation ADC, set the common-mode point on an op-amp chain, or provide a stable threshold for a comparator. The SOT-23-3 package (TO-236-3 / SC-59 footprint) keeps board area small, and the -40°C to +85°C operating range suits industrial control, outdoor telecom, and automotive cabin-domain electronics where a clean, drift-stable voltage is needed without an external trim pot.
4.5 V fixed output — what it means for the BOM
The 4.5 V output is fixed — no feedback pin or trim network. That simplifies the BOM but locks the reference to this one rail.
Package and mounting
Housed in a standard SOT-23-3 (TO-236-3 / SC-59) surface-mount package, the MAX6045AEUR+T shares a footprint with countless other three-terminal references and regulators. No thermal pad or exposed paddle — the SOT-23-3 dissipates through the leads and board copper, adequate at the 500 µA output level since the part rarely dissipates more than a few milliwatts.
Lifecycle and sourcing
It is ROHS3 compliant.