| Parameters | 
                                
                                                                                                            
                                            | Factory Lead Time | 
                                            10 Weeks | 
                                        
                                                                            
                                            | Package / Case | 
                                            48-UFQFN Exposed Pad | 
                                        
                                                                            
                                            | Surface Mount | 
                                            YES | 
                                        
                                                                            
                                            | Operating Temperature | 
                                            -40°C~105°C TA | 
                                        
                                                                            
                                            | Part Status | 
                                            Active | 
                                        
                                                                            
                                            | Moisture Sensitivity Level (MSL) | 
                                            3 (168 Hours) | 
                                        
                                                                            
                                            | Number of Terminations | 
                                            48 | 
                                        
                                                                            
                                            | Type | 
                                            TxRx + MCU | 
                                        
                                                                            
                                            | Voltage - Supply | 
                                            1.71V~3.6V | 
                                        
                                                                            
                                            | Terminal Position | 
                                            QUAD | 
                                        
                                                                            
                                            | Terminal Form | 
                                            NO LEAD | 
                                        
                                                                            
                                            | Peak Reflow Temperature (Cel) | 
                                            NOT SPECIFIED | 
                                        
                                                                            
                                            | Supply Voltage | 
                                            3V | 
                                        
                                                                            
                                            | Terminal Pitch | 
                                            0.5mm | 
                                        
                                                                            
                                            | Reach Compliance Code | 
                                            compliant | 
                                        
                                                                            
                                            | Frequency | 
                                            2.405GHz~2.48GHz | 
                                        
                                                                            
                                            | Time@Peak Reflow Temperature-Max (s) | 
                                            NOT SPECIFIED | 
                                        
                                                                            
                                            | Base Part Number | 
                                            STM32WB55 | 
                                        
                                                                            
                                            | Memory Size | 
                                            512kB Flash 256kB SRAM | 
                                        
                                                                            
                                            | Number of I/O | 
                                            30 | 
                                        
                                                                            
                                            | Speed | 
                                            64 MHz | 
                                        
                                                                            
                                            | Bit Size | 
                                            32 | 
                                        
                                                                            
                                            | Has ADC | 
                                            YES | 
                                        
                                                                            
                                            | DMA Channels | 
                                            YES | 
                                        
                                                                            
                                            | PWM Channels | 
                                            YES | 
                                        
                                                                            
                                            | Protocol | 
                                            Bluetooth v5.0 | 
                                        
                                                                            
                                            | Power - Output | 
                                            6dBm | 
                                        
                                                                            
                                            | RF Family/Standard | 
                                            802.15.4, Bluetooth | 
                                        
                                                                            
                                            | Sensitivity | 
                                            -100dBm | 
                                        
                                                                            
                                            | Data Rate (Max) | 
                                            2Mbps | 
                                        
                                                                            
                                            | Serial Interfaces | 
                                            I2C, SPI, UART, USART, USB | 
                                        
                                                                            
                                            | Current - Receiving | 
                                            3.8mA~7mA | 
                                        
                                                                            
                                            | Current - Transmitting | 
                                            8.1mA~13.1mA | 
                                        
                                                                            
                                            | GPIO | 
                                            30 | 
                                        
                                                                            
                                            | Length | 
                                            7mm | 
                                        
                                                                            
                                            | Width | 
                                            7mm | 
                                        
                                                                            
                                            | RoHS Status | 
                                            RoHS Compliant | 
                                        
                                                                                                    
                            
                         
                                                STM32WB55CEU6 Overview
There is a 48-UFQFN Exposed Pad package on the board that RF transceiver IC is used to save space. It emerges as a TxRx + MCU with transceiver RF's  high efficiency.Look for transceiver variants by searching with STM32WB55.The system operates on the basis of the frequency 2.405GHz~2.48GHz.
STM32WB55CEU6 Features
48-UFQFN Exposed Pad package
TxRx + MCU 
Use STM32WB55
STM32WB55CEU6 Applications
There are a lot of STMicroelectronics STM32WB55CEU6 RF Transceiver ICs applications. 
- Internet of Things (IoT)
 -  
 - Industrial Controls
 - Receive
 - Chemical Sensors
 - LoT applications
 - Industrial and Data Logger
 - Remote Device Management
 - Transmit
 - Smart Meters