| Parameters | 
                                
                                                                                                            
                                            | Package / Case | 
                                            SOT-339 | 
                                        
                                                                            
                                            | Surface Mount | 
                                            YES | 
                                        
                                                                            
                                            | Number of Pins | 
                                            20 | 
                                        
                                                                            
                                            | JESD-609 Code | 
                                            e4 | 
                                        
                                                                            
                                            | Pbfree Code | 
                                            yes | 
                                        
                                                                            
                                            | Moisture Sensitivity Level (MSL) | 
                                            1 | 
                                        
                                                                            
                                            | Number of Terminations | 
                                            20 | 
                                        
                                                                            
                                            | Terminal Finish | 
                                            NICKEL PALLADIUM GOLD | 
                                        
                                                                            
                                            | Max Operating Temperature | 
                                            125°C | 
                                        
                                                                            
                                            | Min Operating Temperature | 
                                            -40°C | 
                                        
                                                                            
                                            | Additional Feature | 
                                            CASCADABLE | 
                                        
                                                                            
                                            | Technology | 
                                            CMOS | 
                                        
                                                                            
                                            | Terminal Position | 
                                            DUAL | 
                                        
                                                                            
                                            | Terminal Form | 
                                            GULL WING | 
                                        
                                                                            
                                            | Peak Reflow Temperature (Cel) | 
                                            260 | 
                                        
                                                                            
                                            | Number of Functions | 
                                            1 | 
                                        
                                                                            
                                            | Supply Voltage | 
                                            5V | 
                                        
                                                                            
                                            | Terminal Pitch | 
                                            0.65mm | 
                                        
                                                                            
                                            | Time@Peak Reflow Temperature-Max (s) | 
                                            30 | 
                                        
                                                                            
                                            | Pin Count | 
                                            20 | 
                                        
                                                                            
                                            | Qualification Status | 
                                            Not Qualified | 
                                        
                                                                            
                                            | Temperature Grade | 
                                            AUTOMOTIVE | 
                                        
                                                                            
                                            | Max Supply Voltage | 
                                            6V | 
                                        
                                                                            
                                            | Min Supply Voltage | 
                                            2V | 
                                        
                                                                            
                                            | Load Capacitance | 
                                            50pF | 
                                        
                                                                            
                                            | Number of Bits | 
                                            8 | 
                                        
                                                                            
                                            | Propagation Delay | 
                                            29 ns | 
                                        
                                                                            
                                            | Response Time | 
                                            16 ns | 
                                        
                                                                            
                                            | Family | 
                                            HC/UH | 
                                        
                                                                            
                                            | Output Polarity | 
                                            INVERTED | 
                                        
                                                                            
                                            | Logic IC Type | 
                                            IDENTITY COMPARATOR | 
                                        
                                                                            
                                            | High Level Output Current | 
                                            5.2mA | 
                                        
                                                                            
                                            | Low Level Output Current | 
                                            5.2mA | 
                                        
                                                                            
                                            | Height Seated (Max) | 
                                            2mm | 
                                        
                                                                            
                                            | Length | 
                                            7.2mm | 
                                        
                                                                            
                                            | Width | 
                                            5.3mm | 
                                        
                                                                            
                                            | RoHS Status | 
                                            RoHS Compliant | 
                                        
                                                                            
                                            | Lead Free | 
                                            Lead Free | 
                                        
                                                                                                    
                            
                         
                                                74HC688DB-T Overview
A convenient packaging is provided in the form of SOT-339 .As you can see, the comparator has20 terminals.With a voltage of 5V supplied, the comparator is capable of performing a wide range of demanding tasks.The pinout of the component starts from 20 pins it has.The comparator consists of 20 pins.Temperature higher than 125°C is not recommended.Lower temperatures than -40°C are unsuitable for it.There is a maximum voltage supply on the comparator of 6V .The comparator is capable of operating at a minimum supply voltage of 2V .
74HC688DB-T Features
74HC688DB-T Applications
There are a lot of NXP Semiconductors / Freescale 74HC688DB-T linear comparators  applications. 
- Self-diagnostics
 - Window Comparators
 - General-Purpose, Low-Voltage Applications
 - Power Supervision
 - Security Detection Systems
 - Laptop Computers
 - Wearable Devices
 - Portable Battery Monitoring
 - General-Purpose Portable Devices
 - Ultra-Low Power Systems