component
BLUENRG-355MC
Public Made by Adomby adom
STMicroelectronics RF Transceiver ICs, QFN-48-EP(6x6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownBLUENRG-355MC
STMicroelectronics · RF Transceiver ICs · QFN-48-EP(6x6)
BLUENRG-355MC from STMicroelectronics, in a QFN-48-EP(6x6). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | PB3 | bidirectional | GPIO, 5 V tolerant (FT_a); alternate functions USART_CTS, LPUART_TX, TIM1_CH4; additional functions ADC_VINP0 and wakeup. |
| 2 | PB2 | bidirectional | GPIO, 5 V tolerant (FT_a); alternate functions USART_RTS_DE, PDM_DATA, TIM1_CH3; additional functions ADC_VINM0 and wakeup. |
| 3 | PB1 | bidirectional | GPIO, 5 V tolerant (FT_a); alternate functions SPI1_NSS, PDM_CLK, TIM1_ETR; additional functions ADC_VINP1 and wakeup. |
| 4 | PB0 | bidirectional | GPIO, 5 V tolerant (FT_a); alternate functions USART_RX, LPUART_RTS_DE, TIM1_CH2N; additional functions ADC_VINM1 and wakeup. |
| 5 | PA15 | bidirectional | GPIO, 5 V tolerant (FT_a); alternate functions I2C2_SMBA, SPI1_MOSI, TIM1_BKIN2; additional functions ADC_VINP2 and wakeup. |
| 6 | PA14 | bidirectional | GPIO, 5 V tolerant (FT_a); alternate functions I2C2_SDA, SPI1_MISO, TIM1_BKIN; additional functions ADC_VINM2 and wakeup. |
| 7 | PA13 | bidirectional | GPIO, 5 V tolerant (FT_a); alternate functions I2C2_SCL, SPI1_SCK, SPI2_MISO, TIM1_ETR, I2S2_MISO; additional functions ADC_VINP3 and wakeup. |
| 8 | PA12 | bidirectional | GPIO, 5 V tolerant (FT_a); alternate functions I2C1_SMBA, SPI1_NSS, SPI2_MOSI, TIM1_CH1, I2S2_SD; additional functions ADC_VINM3 and wakeup. |
| 9 | PA11 | bidirectional | GPIO, 5 V tolerant (FT); alternate functions MCO, SPI1_NSS, RX_SEQUENCE, SPI3_MOSI, TIM1_CH6, I2S3_SD; wakeup, GPIO in DEEPSTOP, RTC_OUT. |
| 10 | PA10 | bidirectional | GPIO, 5 V tolerant (FT); alternate functions LCO, SPI1_MISO, TX_SEQUENCE, SPI3_MCK, TIM1_CH5, I2S3_MCK; BOOT (forced high during reset activates the UART bootloader), wakeup, GPIO in DEEPSTOP, LCO. |
| 11 | PA9 | bidirectional | GPIO, 5 V tolerant (FT); alternate functions USART_TX, SPI1_SCK, RTC_OUT, SPI3_NSS, TIM1_CH4, I2S3_WS; wakeup, GPIO in DEEPSTOP, LCO. |
| 12 | PA8 | bidirectional | GPIO, 5 V tolerant (FT); alternate functions USART_RX, SPI1_MOSI, RX_SEQUENCE, SPI3_MISO, TIM1_CH3, I2S3_MISO; wakeup, GPIO in DEEPSTOP, RTC_OUT. |
| 13 | PA0 | bidirectional | GPIO, 5 V tolerant, Fm+ capable (FT_f); alternate functions I2C1_SCL, USART_CTS, SPI2_MCK, TIM1_CH3, I2S2_MCK; wakeup. |
| 14 | PA1 | bidirectional | GPIO, 5 V tolerant, Fm+ capable (FT_f); alternate functions I2C1_SDA, SPI2_MISO, USART_TX, TIM1_CH4, I2S2_MISO; wakeup. |
| 15 | PA2 | bidirectional | GPIO, 5 V tolerant (FT); alternate functions SWDIO, USART_CK, TIM_BKIN, SPI3_MCK, TIM1_CH5, I2S3_MCK; wakeup. |
| 16 | PA3 | bidirectional | GPIO, 5 V tolerant (FT); alternate functions SWCLK, USART_RTS_DE, TIM_BKIN2, SPI3_SCK, TIM1_CH6, I2S3_SCK; wakeup. |
| 17 | PA4 | bidirectional | GPIO, 5 V tolerant (FT); alternate functions LCO, SPI2_NSS, LPUART_TX, TIM1_CH1, I2S2_WS; wakeup, GPIO in DEEPSTOP, LCO. |
| 18 | PA5 | bidirectional | GPIO, 5 V tolerant (FT); alternate functions MCO, SPI2_SCK, LPUART_RX, TIM1_CH2, I2S2_SCK; wakeup, GPIO in DEEPSTOP, LCO. |
| 19 | PA6 | bidirectional | GPIO, 5 V tolerant (FT); alternate functions LPUART_CTS, SPI2_MOSI, SPI2_NSS, TIM1_CH1, I2S2_SD, I2S2_WS; wakeup, GPIO in DEEPSTOP, LCO. |
| 20 | PA7 | bidirectional | GPIO, 5 V tolerant (FT); alternate functions LPUART_RTS_DE, SPI2_MISO, SPI2_SCK, TIM1_CH2, I2S2_MISO, I2S2_SCK; wakeup, GPIO in DEEPSTOP, RTC_OUT. |
| 21 | VDD2 | power_in | Supply pin, 1.7-3.6 V battery voltage input. |
| 22 | RF1 | bidirectional | RF input/output, 50 Ω impedance, connects to the antenna through matching network. |
| 23 | VDDRF | power_in | RF supply pin, 1.7-3.6 V battery voltage input. |
| 24 | OSCOUT | passive | 32 MHz crystal output (RF-type pin). |
| 25 | OSCIN | passive | 32 MHz crystal input (RF-type pin). |
| 26 | VDD4 | power_in | Supply pin, 1.7-3.6 V battery voltage input. |
| 27 | PB15 | bidirectional | GPIO, 5 V tolerant (FT); alternate functions I2C1_SMBA, TX_SEQUENCE, MCO, TIM1_CH4N, TIM1_CH6, USART_TX. |
| 28 | PB14 | bidirectional | GPIO, 5 V tolerant (FT_a); alternate functions SPI1_MOSI, I2C2_SDA, TIM1_ETR, TIM1_CH3N, TIM1_CH5, USART_RX; additional function VIN_PVD. |
| 29 | PB13/XTAL1 | bidirectional | GPIO, 5 V tolerant (FT); alternate functions SPI1_MISO, I2C2_SCL, PDM_CLK, TIM1_BKIN2, TIM1_CH4; additional function SXTAL1 (32 kHz crystal). |
| 30 | PB12/XTAL0 | bidirectional | GPIO, 5 V tolerant (FT); alternate functions SPI1_SCK, LCO, PDM_DATA, TIM1_BKIN, TIM1_CH3; additional function SXTAL0 (32 kHz crystal). |
| 31 | VCAP | power_out | 1.2 V digital core supply pin, connect decoupling capacitor. |
| 32 | VFBSD | passive | SMPS output; connect to the L/C network, or supply voltage applied here when DC-DC is off (1.4-3.6 V feedback range). |
| 33 | NC | unconnected | Not connected. |
| 34 | VSS | power_in | SMPS ground; must be connected to the ground plane. |
| 35 | VLXSD | passive | SMPS input/output switching node connected to the DC-DC inductor. |
| 36 | VDDSD | power_in | SMPS supply pin, 1.7-3.6 V battery voltage input. |
| 37 | VDD3 | power_in | Supply pin, 1.7-3.6 V battery voltage input. |
| 38 | RSTN | bidirectional | Reset pin with weak pull-up (25-55 kΩ); active low, also the only exit from SHUTDOWN mode. |
| 39 | VDD1 | power_in | Supply pin, 1.7-3.6 V battery voltage input. |
| 40 | VDDA | power_in | 1.2 V analog ADC core supply pin (absolute maximum 1.32 V). |
| 41 | PB11 | bidirectional | GPIO, 5 V tolerant (FT); alternate functions SPI1_SCK, SPI2_NSS, I2C1_SCL, TIM1_CH1, TIM1_CH4N, I2S2_WS; wakeup. |
| 42 | PB10 | bidirectional | GPIO, 5 V tolerant (FT); alternate functions SPI1_NSS, SPI2_SCK, I2C1_SDA, TIM1_CH2, TIM1_CH3N, I2S2_SCK; wakeup. |
| 43 | PB9 | bidirectional | GPIO, 5 V tolerant (FT); alternate functions USART_TX, LPUART_CTS, SPI2_MCK, TIM1_CH1N, TIM1_CH2N, I2S2_MCK; wakeup. |
| 44 | PB8 | bidirectional | GPIO, 5 V tolerant (FT); alternate functions USART_CK, LPUART_RX, TIM1_CH4, TIM1_CH1N; wakeup. |
| 45 | PB7 | bidirectional | GPIO, 5 V tolerant, Fm+ capable (FT_f); alternate functions I2C2_SDA, SPI2_SCK, LPUART_RX, TIM1_CH2, I2S2_SCK; wakeup. |
| 46 | PB6 | bidirectional | GPIO, 5 V tolerant, Fm+ capable (FT_f); alternate functions I2C2_SCL, SPI2_NSS, LPUART_TX, TIM1_CH1, I2S2_WS; wakeup. |
| 47 | PB5 | bidirectional | GPIO, 3.6 V tolerant (TT), not 5 V tolerant; alternate functions LPUART_RX, SPI2_MOSI, PDM_CLK, I2S2_SD; additional functions PGA_VBIAS_MIC and wakeup. |
| 48 | PB4 | bidirectional | GPIO, 5 V tolerant (FT); alternate functions LPUART_TX, SPI2_MISO, PDM_DATA, I2S2_MISO; additional functions PGA_VIN and wakeup. |
| 49 | GND | power_in | Exposed pad ground; must be connected to the ground plane. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | QFN-48-EP(6x6) |
| Category | RF And Wireless |
| Pins | 49 |
CAD (KiCad official)
- Symbol:
BLUENRG-355MC - Footprint:
Package_DFN_QFN:QFN-48-1EP_6x6mm_P0.4mm_EP4.2x4.2mm - 3D model: QFN-48-EP(6x6), generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.9 mm nominal QFN height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files:
bluenrg-355mc-etched.step/bluenrg-355mc-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bluenrg-355mc.step/bluenrg-355mc.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (73 pp, sha256
c3c8def9f2699f65, retrieved 2026-10-01, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).