STM32WB55CX

Part: STM32WB55CGU6 — STMicroelectronics

Type: Multiprotocol Wireless 32-bit MCU

Description: Dual-core wireless microcontroller with an Arm Cortex-M4 CPU running up to 64 MHz and a dedicated Cortex-M0+ radio coprocessor supporting Bluetooth 5.4 and IEEE 802.15.4 / Zigbee / Thread, operating from 1.71 to 3.6 V.

Operating Conditions:

• Supply voltage: 1.71 to 3.6 V (VDD)
• Operating temperature: -40 to 85 °C (suffix 6, maximum power dissipation)
• Maximum clock frequency: 64 MHz (AHB/APB1/APB2)

Absolute Maximum Ratings:

• Max supply voltage: 4.0 V (external main supply voltage VDDX - VSS)
• Max continuous current: 130 mA (total current into sum of all VDD power lines / out of sum of all VSS lines)
• Max junction/storage temperature: 130 °C max junction temperature (-65 to +150 °C storage temperature)

Key Specs:

• Total VDD source current: 130 mA max
• Output current sunk/sourced per I/O pin: 20 mA max
• Total output current sunk/sourced by all I/Os: 100 mA max
• Internal AHB/APB clock frequency: 0 to 64 MHz
• Analog supply voltage (VDDA): 1.62 to 3.6 V (ADC or COMP used)
• Backup supply voltage (VBAT): 1.55 to 3.6 V
• RF TX current: 5.2 mA at 0 dBm
• RF RX current: 4.5 mA

Features:

• 2.4 GHz RF transceiver supporting Bluetooth 5.4, IEEE 802.15.4-2011, Zigbee 3.0, and Thread 1.3
• Dual Arm architecture: Cortex-M4 CPU with FPU up to 64 MHz and Cortex-M0+ network coprocessor
• Built-in balun and high-efficiency embedded SMPS step-down converter with bypass mode
• Up to 1 MB Flash memory and up to 256 KB SRAM (64 KB with parity check)
• 12-bit ADC up to 4.26 Msps (up to 16-bit with hardware oversampling) and 2 ultra-low-power comparators
• Hardware crypto: 3x AES up to 256-bit, PKA, RNG, and secure firmware installation (SFI)
• Rich digital interfaces: USB 2.0 Full Speed (crystal-less), Quad-SPI, 2x SPI, 2x I2C, USART, LPUART, SAI

Applications:

• Bluetooth Low Energy and IEEE 802.15.4 connected devices
• Home automation, smart lighting, and building automation (Zigbee/Thread)
• Wearable electronics and medical devices
• Industrial IoT sensors and asset tracking

Package:

• UFQFPN48 (7 x 7 mm)
• VFQFPN68 (8 x 8 mm)
• WLCSP100 (0.4 mm pitch)
• UFBGA129 (0.5 mm pitch)

• Include ST state-of-the-art patented technology
• Radio
• -2.4 GHz
• -RF transceiver supporting Bluetooth ® 5.4 specification, IEEE 802.15.4-2011 PHY and MAC, supporting Thread 1.3 and Zigbee ® 3.0
• -RX sensitivity: -96 dBm (Bluetooth ® Low Energy at 1 Mbps), -100 dBm (802.15.4)
• -Programmable output power up to +6 dBm with 1 dB steps
• -Integrated balun to reduce BOM
• -Support for 2 Mbps
• -Support GATT caching
• -Support EATT (enhanced ATT)
• -Support advertising extension
• -Dedicated Arm ® 32-bit Cortex ® M0+ CPU for real-time Radio layer
• -Accurate RSSI to enable power control
• -Suitable for systems requiring compliance with radio frequency regulations ETSI EN 300 328, EN 300 440, FCC CFR47 Part 15 and ARIB STD-T66
• -Support for external PA
• -Available integrated passive device (IPD) companion chip for optimized matching solution (MLPF-WB-01E3, or MLPF-WB55-02E3, or MLPF-WB-02D3)
• Ultra-low-power platform
• -1.71 to 3.6 V power supply
• -- 40 °C to 85 / 105 °C temperature ranges
• -13 nA shutdown mode
• -600 nA Standby mode + RTC + 32 KB RAM
• -2.1 μA Stop mode + RTC + 256 KB RAM
• -Active-mode MCU: < 53 μA / MHz when RF and SMPS on

October 2024

• -Internal low-power 32 kHz (±5%) RC (LSI1)

DS11929 Rev 17

• -Internal low-power 32 kHz (stability ±500 ppm) RC (LSI2)
• -Internal multispeed 100 kHz to 48 MHz oscillator, auto-trimmed by LSE (better than ±0.25% accuracy)
• -High speed internal 16 MHz factory trimmed RC (±1%)
• -2x PLL for system clock, USB, SAI, ADC

The RF block contains dedicated pins, listed in Table 4 .

:

Table 4. RF pin list

The definition and values of input/output AC characteristics are given in Table 74 .

Unless otherwise specified, the parameters given are derived from tests performed under the ambient temperature and supply voltage conditions summarized in Table 24: General operating conditions .

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Table 74. I/O AC characteristics (1)(2)

1. This value represents the I/O capability but the maximum system frequency is limited to 64 MHz.

Stresses above the absolute maximum ratings listed in Table 20 , Table 21 and Table 22 may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these conditions is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.

Device mission profile (application conditions) is compliant with JEDEC JESD47 Qualification Standard, extended mission profiles are available on demand.

168

Table 20. Voltage characteristics (1)

1. VIN maximum must always be respected. Refer to Table 21 for the maximum allowed injected current values.
2. This formula must be applied only on the power supplies related to the IO structure described in the pin definition table.
3. To sustain a voltage higher than 4 V the internal pull-up/pull-down resistors must be disabled.
4. Include VREF- pin.

Table 21. Current characteristics

1. When several inputs are submitted to a current injection, the maximum ∑ |I INJ(PIN) | is the absolute sum of the negative injected currents (instantaneous values).

Table 22. Thermal characteristics

Table 22. Thermal characteristics

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The maximum chip junction temperature (T J max) must never exceed the values given in Table 24: General operating conditions .

The maximum chip-junction temperature, T J max, in degrees Celsius, can be calculated using the equation:

$$T_J\text{ max} = T_A\text{ max} + (P_D\text{ max} \times \Theta_{JA})$$

The schematic in Figure 4 and the external components listed in Table 4 are purely indicative. For more details refer to the 'Reference design' provided in separate documents.

Note:

Figure 4. External components for the RF part

Table 5. Typical external components

For more details refer to AN5165 'Development of RF hardware using STM32WB microcontrollers' available on www.st.com.

In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com . ECOPACK is an ST trademark.