36 MHz Cortex-M3 with 128 KB Flash — what the ceiling buys you
The STM32F101RBT6TR: The 36 MHz ceiling is the deliberate cost-optimization point in the family — it runs the Cortex-M3 core at half the speed of the STM32F103 sibling, which is a direct trade for lower active current and a lower BOM entry price. For applications that need the M3 pipeline and peripheral set but don't need 72 MHz throughput — sensor hubs, simple motor controls, human-machine interfaces — this part fits without paying for unused clock headroom.
Peripheral set and connectivity — what's available on the bus
The peripheral list includes DMA, PDR, POR, PVD, PWM, a temperature sensor, and a watchdog timer. The 16-channel 12-bit ADC (A/D 16x12b) handles analog sensor inputs without an external converter.
The Vcc range of 2V to 3.6V lets the MCU run directly from two alkaline cells or a shared 3.3V rail without a separate LDO.
The lifecycle status is listed as Active. The base product number STM32F101 anchors the family, so die revisions or errata updates would roll under the same ordering code.
Sourcing posture — quoted to order on the spot market
No stock-count or lead-time figure is published here because the supply picture changes weekly — a direct RFQ returns the real-time position.