| 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 | 
                                        
                                                                            
                                            | Subcategory | 
                                            Arithmetic Circuits | 
                                        
                                                                            
                                            | 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 | 
                                        
                                                                            
                                            | Power Supplies | 
                                            5V | 
                                        
                                                                            
                                            | Temperature Grade | 
                                            AUTOMOTIVE | 
                                        
                                                                            
                                            | Max Supply Voltage | 
                                            5.5V | 
                                        
                                                                            
                                            | Min Supply Voltage | 
                                            4.5V | 
                                        
                                                                            
                                            | Load Capacitance | 
                                            50pF | 
                                        
                                                                            
                                            | Number of Bits | 
                                            8 | 
                                        
                                                                            
                                            | Propagation Delay | 
                                            34 ns | 
                                        
                                                                            
                                            | Response Time | 
                                            17 ns | 
                                        
                                                                            
                                            | Family | 
                                            HCT | 
                                        
                                                                            
                                            | Output Polarity | 
                                            INVERTED | 
                                        
                                                                            
                                            | Logic IC Type | 
                                            IDENTITY COMPARATOR | 
                                        
                                                                            
                                            | High Level Output Current | 
                                            4mA | 
                                        
                                                                            
                                            | Low Level Output Current | 
                                            4mA | 
                                        
                                                                            
                                            | Height Seated (Max) | 
                                            2mm | 
                                        
                                                                            
                                            | Length | 
                                            7.2mm | 
                                        
                                                                            
                                            | Width | 
                                            5.3mm | 
                                        
                                                                            
                                            | RoHS Status | 
                                            RoHS Compliant | 
                                        
                                                                            
                                            | Lead Free | 
                                            Lead Free | 
                                        
                                                                                                    
                            
                         
                                                74HCT688DB Overview
The product is packaged in SOT-339 to facilitate transportation.There are 20 terminals on the comparator.The component belongs to the Arithmetic Circuits family of electrical components.With a 5V voltage supply, the comparator can perform multiple demanding tasks.The device includes 20 pins.This comparator has 20 pins.5V power supplies are enough to run the device.Temperatures above 125°C are not recommended.Comparator electronics will not be able to function at temperatures below -40°C .5.5V is the maximum supply voltage of the comparator.A minimum supply voltage of 4.5V is allowed for this comparator.
74HCT688DB Features
74HCT688DB Applications
There are a lot of NXP Semiconductors / Freescale 74HCT688DB linear comparators  applications. 
- Automotive
 - General-Purpose, Low-Voltage Applications
 - Set Top Boxes
 - Window Comparators
 - Wireless Base Stations
 - Lithium ion battery monitoring
 - Current and voltage sensing
 - Consumer Medical Electronics
 - Ultra-Low Power Systems
 - Zero-Crossing Detectors