| Parameters | 
                                
                                                                                                            
                                            | Mounting Type | 
                                            Surface Mount | 
                                        
                                                                            
                                            | Package / Case | 
                                            20-SOIC (0.295, 7.50mm Width) | 
                                        
                                                                            
                                            | Supplier Device Package | 
                                            20-SO | 
                                        
                                                                            
                                            | Operating Temperature | 
                                            -40°C~125°C | 
                                        
                                                                            
                                            | Packaging | 
                                            Tube | 
                                        
                                                                            
                                            | Series | 
                                            74HCT | 
                                        
                                                                            
                                            | Part Status | 
                                            Obsolete | 
                                        
                                                                            
                                            | Moisture Sensitivity Level (MSL) | 
                                            1 (Unlimited) | 
                                        
                                                                            
                                            | Type | 
                                            Identity Comparator | 
                                        
                                                                            
                                            | Voltage - Supply | 
                                            4.5V~5.5V | 
                                        
                                                                            
                                            | Output | 
                                            Active Low | 
                                        
                                                                            
                                            | Number of Bits | 
                                            8 | 
                                        
                                                                            
                                            | Current - Quiescent (Iq) | 
                                            8μA | 
                                        
                                                                            
                                            | Current - Output High, Low | 
                                            4mA 4mA | 
                                        
                                                                            
                                            | Max Propagation Delay @ V, Max CL | 
                                            34ns @ 4.5V, 50pF | 
                                        
                                                                            
                                            | Output Function | 
                                            A=B | 
                                        
                                                                            
                                            | RoHS Status | 
                                            ROHS3 Compliant | 
                                        
                                                                                                    
                            
                         
                                                74HCT688D,652 Overview
The Packaging is made of Tube's materials.20-SOIC (0.295, 7.50mm Width) is well known for its low package costs in the electronics industry.Comparator is designed with 8 Bits.74HCT Series offers outstanding performance-cost ratios.Located in Surface Mount is this electronic part.The output of this electrical device is  Active Low.  An internal 4.5V~5.5V Supply Voltage ensures the device's normal operation.To ensure reliability, it operates at -40°C~125°C Operating Temperature.There is no minimum grade requirement for the Identity Comparator Type.The High/Low output current of 4mA 4mA makes it capable of securing maximum design flexibility.As its Supplier Device Package, it uses 20-SO.
74HCT688D,652 Features
20-SOIC (0.295, 7.50mm Width) package
8 Bits
74HCT series
74HCT688D,652 Applications
There are a lot of Rochester Electronics, LLC 74HCT688D,652  applications of comparators. 
- Process contollenr
 - Communications digltal frequency synthesizers: VHF, UHF, FM, AM, etc.
 - Fixed or programmable irequency division
 - Servo Motor Controls
 - Servo motor controls
 - Companion Appliceation Nole, ICAN-6374, "Application of the CMOS CD4059A Programmable Divide-by-N Counter in FM and Ctizens Band Transceiver Digital Tuners"
 - “Time out" timer for consume-appication industrial controls