STM32F103RCY6TR is an STMicroelectronics Arm Cortex-M3 microcontroller with 256 KB Flash, 72 MHz, in WLCSP-64 tape and reel — full F103 performance in a 4.5x4.4 mm chip-scale package. The wafer-level package is the selection point: the smallest possible F103 footprint for wearables and ultra-dense boards. Selection advice: the Y6TR denotes WLCSP-64 in tape and reel — confirm 0.5 mm-pitch WLCSP assembly and inspection capability; this package is unforgiving. Electrically identical to the LQFP RC parts, so firmware ports directly. 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.
STM32F103RC is available in the following manufacturer order codes. They share the same STM32F103RC design; the table highlights package, packing and ordering differences. Quote the exact code your BOM needs.
| Order code | Package | Packing | Key difference |
|---|---|---|---|
| STM32F103RCT6 | LQFP-64 | — | — |
| STM32F103RCT6TR | LQFP 64 10x10x1.4 mm | — | Compared with STM32F103RCT6, 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. |
| STM32F103RCT7 | LQFP 64 10x10x1.4 mm | — | Compared with STM32F103RCT6, temperature grade changes from -40.0 to 85.0 °C to -40.0 to 105.0 °C. Verify the factory packing and PCB footprint before treating order codes as interchangeable. |
| STM32F103RCT7TR | LQFP 64 10x10x1.4 mm | — | Compared with STM32F103RCT6, package changes from LQFP 64 10x10x1.4 mm to LQFP 64 10x10x1.4 mmSupply Voltage Min Volt2.0Supply Voltage Max Volt3.6. Verify the factory packing and PCB footprint before treating order codes as interchangeable. |
| STM32F103RCY6TR | WLCSP 64 4.5x4.4x0.6 P 0.5 mm | — | Compared with STM32F103RCT6, package changes from LQFP 64 10x10x1.4 mm to WLCSP 64 4.5x4.4x0.6 P 0.5 mm. Verify the factory packing and PCB footprint before treating order codes as interchangeable. |
Exact MPN, manufacturer and suffix
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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 — STM32F103RCT6 (LQFP-64); STM32F103RCT6TR: Compared with STM32F103RCT6, 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.; STM32F103RCT7: Compared with STM32F103RCT6, temperature grade changes from -40.0 to 85.0 °C to -40.0 to 105.0 °C. Verify the factory packing and PCB footprint before treating order codes as interchangeable.. STM32F103RCY6TR itself is the WLCSP 64 4.5x4.4x0.6 P 0.5 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-M3; Flash memory: 256 KB; CPU frequency: 72 MHz. These are the catalog-recorded values for STM32F103RCY6TR — always re-check them against the manufacturer datasheet revision quoted on your BOM before finalizing the design.