| Parameters | 
                                
                                                                                                            
                                            | Mounting Type | 
                                            Surface Mount | 
                                        
                                                                            
                                            | Package / Case | 
                                            20-UFQFN | 
                                        
                                                                            
                                            | Surface Mount | 
                                            YES | 
                                        
                                                                            
                                            | Operating Temperature | 
                                            -40°C~85°C | 
                                        
                                                                            
                                            | Packaging | 
                                            Tape & Reel (TR) | 
                                        
                                                                            
                                            | Published | 
                                            2003 | 
                                        
                                                                            
                                            | Part Status | 
                                            Discontinued | 
                                        
                                                                            
                                            | Moisture Sensitivity Level (MSL) | 
                                            3  (168 Hours) | 
                                        
                                                                            
                                            | Number of Terminations | 
                                            20 | 
                                        
                                                                            
                                            | Type | 
                                            Buttons, Slider, Wheel | 
                                        
                                                                            
                                            | HTS Code | 
                                            8542.39.00.01 | 
                                        
                                                                            
                                            | Voltage - Supply | 
                                            2V~3.6V | 
                                        
                                                                            
                                            | Terminal Position | 
                                            QUAD | 
                                        
                                                                            
                                            | Terminal Form | 
                                            NO LEAD | 
                                        
                                                                            
                                            | Number of Functions | 
                                            1 | 
                                        
                                                                            
                                            | Supply Voltage | 
                                            3.3V | 
                                        
                                                                            
                                            | Terminal Pitch | 
                                            0.4mm | 
                                        
                                                                            
                                            | JESD-30 Code | 
                                            S-XQCC-N20 | 
                                        
                                                                            
                                            | Supply Voltage-Max (Vsup) | 
                                            3.6V | 
                                        
                                                                            
                                            | Supply Voltage-Min (Vsup) | 
                                            2V | 
                                        
                                                                            
                                            | Interface | 
                                            I2C | 
                                        
                                                                            
                                            | Current - Supply | 
                                            393μA | 
                                        
                                                                            
                                            | Number of Inputs | 
                                            Up to 12 | 
                                        
                                                                            
                                            | Proximity Detection | 
                                            Yes | 
                                        
                                                                            
                                            | LED Driver Channels | 
                                            Up to 8 | 
                                        
                                                                            
                                            | Height Seated (Max) | 
                                            0.6mm | 
                                        
                                                                            
                                            | Length | 
                                            3mm | 
                                        
                                                                            
                                            | Width | 
                                            3mm | 
                                        
                                                                            
                                            | RoHS Status | 
                                            ROHS3 Compliant | 
                                        
                                                                                                    
                            
                         
                                                MPR121QR2 Overview
The packaging uses materials from Tape & Reel (TR). Mounting it on a PCB requires Surface Mount. Low package costs are one of the reasons for 20-UFQFN's popularity in the electronic industry. 2V~3.6V's normal operation is guaranteed by the 2V~3.6V Supply Voltage. There is a need to use inputs of Up to 12. Standard grade applications belong to Type Buttons, Slider, Wheel. Temperature -40°C~85°C should always be maintained during operation. 393μA provides this system with its supply current. There are Up to 8 channels on the LED drivers. Using terminations of 20, it is constructed. 3.3V-volt power is always supplied to the component. Vsup must be greater than 2V. As Vsup reaches maximum, 3.6V is reached. 
MPR121QR2 Features
20-UFQFN package
Up to 8 LED driver channels
MPR121QR2 Applications
There are a lot of NXP USA Inc. MPR121QR2 Capacitive Sensors applications. 
- Appliances
 - Level Sensor for Liquids, including Conductive ones such as Detergent, Soap, and Ink
 - E-reader
 - Material Stack Height
 - Appliances
 - Pointing devices
 - Proximity Sensor
 - White goods
 - Navigation devices
 - Television, audio/video