| Parameters | 
                                
                                                                                                            
                                            | Factory Lead Time | 
                                            8 Weeks | 
                                        
                                                                            
                                            | Mounting Type | 
                                            Surface Mount | 
                                        
                                                                            
                                            | Package / Case | 
                                            48-VFQFN Exposed Pad | 
                                        
                                                                            
                                            | Operating Temperature | 
                                            -40°C~85°C | 
                                        
                                                                            
                                            | Packaging | 
                                            Tray | 
                                        
                                                                            
                                            | Published | 
                                            2013 | 
                                        
                                                                            
                                            | Part Status | 
                                            Not For New Designs | 
                                        
                                                                            
                                            | Moisture Sensitivity Level (MSL) | 
                                            2  (1 Year) | 
                                        
                                                                            
                                            | Type | 
                                            TxRx + MCU | 
                                        
                                                                            
                                            | Voltage - Supply | 
                                            2.1V~3.6V | 
                                        
                                                                            
                                            | Frequency | 
                                            2.4GHz | 
                                        
                                                                            
                                            | Memory Size | 
                                            192kB Flash 12kB RAM | 
                                        
                                                                            
                                            | Protocol | 
                                            Zigbee® | 
                                        
                                                                            
                                            | Power - Output | 
                                            8dBm | 
                                        
                                                                            
                                            | RF Family/Standard | 
                                            802.15.4 | 
                                        
                                                                            
                                            | Sensitivity | 
                                            -102dBm | 
                                        
                                                                            
                                            | Data Rate (Max) | 
                                            5Mbps | 
                                        
                                                                            
                                            | Serial Interfaces | 
                                            I2C, JTAG, SPI, UART | 
                                        
                                                                            
                                            | Current - Receiving | 
                                            22mA~28.5mA | 
                                        
                                                                            
                                            | Current - Transmitting | 
                                            21.5mA~43.5mA | 
                                        
                                                                            
                                            | Modulation | 
                                            O-QPSK | 
                                        
                                                                            
                                            | RoHS Status | 
                                            Non-RoHS Compliant | 
                                        
                                                                                                    
                            
                         
                                                EM357-ZRT Overview
48-VFQFN Exposed Pad package saves space on the board. The RF transceiver's mounting method is Surface Mount.With transceiver RF's  high efficiency, it appears as a TxRx + MCU.High reliability is achieved with advanced transceiver RF' packaging Tray.The system operates on the basis of the frequency 2.4GHz.
EM357-ZRT Features
48-VFQFN Exposed Pad package
Surface Mount for mounting
TxRx + MCU 
 Tray is used
EM357-ZRT Applications
There are a lot of Silicon Labs EM357-ZRT RF Transceiver ICs applications. 
- Chemical Sensors
 - Digital Remote
 - Industrial and Data Logger
 - Automotive
 - Switch
 - Thermostats
 - Remote Control
 - Wireless Price Tags
 - Consumer Electronics
 - Health care