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BLUENRG-355AC
Public Made by Adomby adom
STMicroelectronics RF Transceiver ICs, QFN-32-EP(5x5). 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-355AC
STMicroelectronics · RF Transceiver ICs · QFN-32-EP(5x5)
BLUENRG-355AC from STMicroelectronics, in a QFN-32-EP(5x5). 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 | I/O pin with 5 V tolerance; supports USART_CTS, LPUART_TX, TIM1_CH4 alternate functions; ADC_VINP0 analog input; wakeup capable. |
| 2 | PB2 | bidirectional | I/O pin with 5 V tolerance; supports USART_RTS_DE, PDM_DATA, TIM1_CH3 alternate functions; ADC_VINM0 analog input; wakeup capable. |
| 3 | PB1 | bidirectional | I/O pin with 5 V tolerance; supports SPI1_NSS, PDM_CLK, TIM1_ETR alternate functions; ADC_VINP1 analog input; wakeup capable. |
| 4 | PB0 | bidirectional | I/O pin with 5 V tolerance; supports USART_RX, LPUART_RTS_DE, TIM1_CH2N alternate functions; ADC_VINM1 analog input; wakeup capable. |
| 5 | PA11 | bidirectional | I/O pin with 5 V tolerance; supports MCO, SPI1_NSS, RX_SEQUENCE, SPI3_MOSI, TIM1_CH6, I2S3_SD alternate functions; provides GPIO output and RTC_OUT in DEEPSTOP mode; wakeup capable. |
| 6 | PA10 | bidirectional | I/O pin with 5 V tolerance; supports LCO, SPI1_MISO, TX_SEQUENCE, SPI3_MCK, TIM1_CH5, I2S3_MCK alternate functions; BOOT pin configuration; GPIO output in DEEPSTOP mode; wakeup capable. |
| 7 | PA9 | bidirectional | I/O pin with 5 V tolerance; supports USART_TX, SPI1_SCK, RTC_OUT, SPI3_NSS, TIM1_CH4, I2S3_WS alternate functions; GPIO output in DEEPSTOP mode; wakeup capable. |
| 8 | PA8 | bidirectional | I/O pin with 5 V tolerance; supports USART_RX, SPI1_MOSI, RX_SEQUENCE, SPI3_MISO, TIM1_CH3, I2S3_MISO alternate functions; GPIO output in DEEPSTOP mode; wakeup capable. |
| 9 | PA0 | bidirectional | I/O pin with 5 V tolerance and Fm+ capable; supports I2C1_SCL, USART_CTS, SPI2_MCK, TIM1_CH3, I2S2_MCK alternate functions; wakeup capable. |
| 10 | PA1 | bidirectional | I/O pin with 5 V tolerance and Fm+ capable; supports I2C1_SDA, SPI2_MISO, USART_TX, TIM1_CH4, I2S2_MISO alternate functions; wakeup capable. |
| 11 | PA2 | bidirectional | I/O pin with 5 V tolerance; supports SWDIO, USART_CK, TIM_BKIN, SPI3_MCK, TIM1_CH5, I2S3_MCK alternate functions; wakeup capable. |
| 12 | PA3 | bidirectional | I/O pin with 5 V tolerance; supports SWCLK, USART_RTS_DE, TIM_BKIN2, SPI3_SCK, TIM1_CH6, I2S3_SCK alternate functions; wakeup capable. |
| 13 | VDD2 | power_in | Battery voltage supply input, 1.7 to 3.6 V. |
| 14 | RF1 | bidirectional | RF input/output with 50 Ω characteristic impedance for antenna connection. |
| 15 | VDDRF | power_in | RF battery voltage supply input, 1.7 to 3.6 V. |
| 16 | OSCOUT | bidirectional | 32 MHz oscillator output for external crystal oscillator circuit. |
| 17 | OSCIN | bidirectional | 32 MHz oscillator input for external crystal oscillator circuit. |
| 18 | PB15 | bidirectional | I/O pin with 5 V tolerance; supports I2C1_SMBA, TX_SEQUENCE, MCO, TIM1_CH4N, TIM1_CH6, USART_TX alternate functions. |
| 19 | PB14 | bidirectional | I/O pin with 5 V tolerance and analog switch; supports SPI1_MOSI, I2C2_SDA, TIM1_ETR, TIM1_CH3N, TIM1_CH5, USART_RX alternate functions; VIN_PVD analog input. |
| 20 | PB13 | bidirectional | I/O pin with 5 V tolerance; supports SPI1_MISO, I2C2_SCL, PDM_CLK, TIM1_BKIN2, TIM1_CH4 alternate functions; SXTAL1 function for crystal oscillator. |
| 21 | PB12 | bidirectional | I/O pin with 5 V tolerance; supports SPI1_SCK, LCO, PDM_DATA, TIM1_BKIN, TIM1_CH3 alternate functions; SXTAL0 function for crystal oscillator. |
| 22 | VFBSD | passive | SMPS feedback voltage output for DC-DC converter step-down regulator. |
| 23 | VSS | power_in | Ground connection. |
| 24 | VLXSD | passive | SMPS inductor voltage input/output node. |
| 25 | VDDSD | power_in | Battery voltage supply input for SMPS, 1.7 to 3.6 V. |
| 26 | RSTN | input | Active-low reset input with internal pull-up resistor (25-55 kΩ) and 200 mV Schmitt trigger hysteresis. |
| 27 | VCAP | passive | Digital core voltage regulator output, nominally 1.2 V. |
| 28 | PB7 | bidirectional | I/O pin with 5 V tolerance and Fm+ capable; supports I2C2_SDA, SPI2_SCK, LPUART_RX, TIM1_CH2, I2S2_SCK alternate functions; wakeup capable. |
| 29 | PB6 | bidirectional | I/O pin with 5 V tolerance and Fm+ capable; supports I2C2_SCL, SPI2_NSS, LPUART_TX, TIM1_CH1, I2S2_WS alternate functions; wakeup capable. |
| 30 | PB5 | bidirectional | I/O pin with 3.6 V tolerance; supports LPUART_RX, SPI2_MOSI, PDM_CLK, I2S2_SD alternate functions; PGA_VBIAS_MIC analog output; wakeup capable. |
| 31 | PB4 | bidirectional | I/O pin with 5 V tolerance; supports LPUART_TX, SPI2_MISO, PDM_DATA, I2S2_MISO alternate functions; PGA_VIN analog input; wakeup capable. |
| 32 | VDD1 | power_in | Battery voltage supply input, 1.7 to 3.6 V. |
| 33 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | QFN-32-EP(5x5) |
| Category | RF And Wireless |
| Pins | 33 |
CAD (KiCad official)
- Symbol:
BLUENRG-355AC - Footprint:
Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.3x3.3mm - 3D model: QFN-32-EP(5x5) (KiCad packages3D, STEP)
- 3D model files:
bluenrg-355ac-etched.step/bluenrg-355ac-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bluenrg-355ac.step/bluenrg-355ac.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (73 pp, sha256
c3c8def9f2699f65, retrieved 2026-09-24, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).