STM32L072CBY6TR is an STMicroelectronics Arm Cortex-M0+ microcontroller with 128 KB Flash, 32 MHz, in WLCSP-49 tape and reel — for ultra-low-power sensing in the smallest possible footprint: miniature LoRa nodes and ingestible-scale sensors. The 3.3x3.3 mm wafer-level package plus sub-microamp sleep is the selection point: multi-year battery life at chip scale. Selection advice: the Y6TR denotes WLCSP-49 in tape and reel — confirm 0.4 mm-pitch WLCSP assembly and inspection capability; this package is unforgiving. ST lists this order code as active; we verify availability per lot. Parameters verified against the ST official product page.
Ordering-code highlights reviewed against official manufacturer documentation.
STM32L072CB is available in the following manufacturer order codes. They share the same STM32L072CB design; the table highlights package, packing and ordering differences. Quote the exact code your BOM needs.
| Order code | Package | Packing | Key difference |
|---|---|---|---|
| STM32L072CBT6 | LQFP-48 | — | — |
| STM32L072CBT6TR | LQFP 48 7x7x1.4 mm | — | Compared with STM32L072CBT6, package and listed temperature grade match, but the order-code suffix differs. Verify the factory packing and PCB footprint before treating order codes as interchangeable. |
| STM32L072CBU6 | UFQFPN 48 7x7x0.55 mm | — | Compared with STM32L072CBT6, package changes from LQFP 48 7x7x1.4 mm to UFQFPN 48 7x7x0.55 mm. Verify the factory packing and PCB footprint before treating order codes as interchangeable. |
| STM32L072CBY6TR | WLCSP 49 3.3x3.3x0.6 P 0.4 mm | — | Compared with STM32L072CBT6, package changes from LQFP 48 7x7x1.4 mm to WLCSP 49 3.3x3.3x0.6 P 0.4 mm. Verify the factory packing and PCB footprint before treating order codes as interchangeable. |
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Browse existing catalog records — same series first, then the same category and manufacturer. These are not confirmed replacements; compatibility requires engineering review.
These are order-code variants of the same STMicroelectronics series. They share the core design; the ordering code selects the exact configuration — STM32L072CBT6 (LQFP-48); STM32L072CBT6TR: Compared with STM32L072CBT6, package and listed temperature grade match, but the order-code suffix differs. Verify the factory packing and PCB footprint before treating order codes as interchangeable.; STM32L072CBU6: Compared with STM32L072CBT6, package changes from LQFP 48 7x7x1.4 mm to UFQFPN 48 7x7x0.55 mm. Verify the factory packing and PCB footprint before treating order codes as interchangeable.. STM32L072CBY6TR itself is the WLCSP 49 3.3x3.3x0.6 P 0.4 mm configuration. A code that differs by even one character may be a different device, so always quote the complete code exactly as it appears on your BOM.
From the verified technical profile: Core: Arm Cortex-M0+; Flash memory: 128 KB; CPU frequency: 32 MHz. These are the catalog-recorded values for STM32L072CBY6TR — always re-check them against the manufacturer datasheet revision quoted on your BOM before finalizing the design.