| Parameters | 
                                
                                                                                                            
                                            | Factory Lead Time | 
                                            142 Weeks | 
                                        
                                                                            
                                            | Mounting Type | 
                                            Surface Mount | 
                                        
                                                                            
                                            | Package / Case | 
                                            20-VFQFN Exposed Pad | 
                                        
                                                                            
                                            | Number of Pins | 
                                            20 | 
                                        
                                                                            
                                            | Operating Temperature | 
                                            -40°C~85°C | 
                                        
                                                                            
                                            | Packaging | 
                                            Tray | 
                                        
                                                                            
                                            | Published | 
                                            2011 | 
                                        
                                                                            
                                            | Part Status | 
                                            Obsolete | 
                                        
                                                                            
                                            | Moisture Sensitivity Level (MSL) | 
                                            3 (168 Hours) | 
                                        
                                                                            
                                            | Type | 
                                            TxRx + MCU | 
                                        
                                                                            
                                            | Voltage - Supply | 
                                            1.8V~3.6V | 
                                        
                                                                            
                                            | Frequency | 
                                            119MHz~1.05GHz | 
                                        
                                                                            
                                            | Operating Supply Voltage | 
                                            3.6V | 
                                        
                                                                            
                                            | Power - Output | 
                                            16dBm Max | 
                                        
                                                                            
                                            | RF Family/Standard | 
                                            General ISM < 1GHz | 
                                        
                                                                            
                                            | Data Rate (Max) | 
                                            1Mbps | 
                                        
                                                                            
                                            | Serial Interfaces | 
                                            SPI | 
                                        
                                                                            
                                            | Current - Receiving | 
                                            10.7mA~13.7mA | 
                                        
                                                                            
                                            | Current - Transmitting | 
                                            29mA~43mA | 
                                        
                                                                            
                                            | Modulation | 
                                            4GFSK, GFSK, GMSK, OOK | 
                                        
                                                                            
                                            | Sensitivity (dBm) | 
                                            -126 dBm | 
                                        
                                                                            
                                            | GPIO | 
                                            4 | 
                                        
                                                                            
                                            | RoHS Status | 
                                            RoHS Compliant | 
                                        
                                                                                                    
                            
                         
                                                SI4461-B0B-FM Overview
The 20-VFQFN Exposed Pad package RF transceiver IC is used for saving board space. For RF transceiver's mounting, it uses the Surface Mount method.When transceiver RF emerges as a TxRx + MCU, it shows high-performance and reliability.A high level of reliability is provided by using an advanced transceiver RF' packaging Tray.transceiver RF circuit boards with 20 pins are designed.The frequency of 119MHz~1.05GHz is used as the basis for RF transceivers operation.
SI4461-B0B-FM Features
20-VFQFN Exposed Pad package
Surface Mount for mounting
TxRx + MCU 
 Tray is used
20 pins
SI4461-B0B-FM Applications
There are a lot of Silicon Labs SI4461-B0B-FM RF Transceiver ICs applications. 
- Digital Remote
 -  
 - M2M Communication
 - Industrial Controls
 - Switch
 - Internet Radio
 - POS Terminals
 - Security Systems
 - HVAC
 - Retail