| Parameters | 
                                
                                                                                                            
                                            | Package / Case | 
                                            SO | 
                                        
                                                                            
                                            | Surface Mount | 
                                            YES | 
                                        
                                                                            
                                            | Number of Pins | 
                                            20 | 
                                        
                                                                            
                                            | Number of Terminations | 
                                            20 | 
                                        
                                                                            
                                            | Max Operating Temperature | 
                                            70°C | 
                                        
                                                                            
                                            | Min Operating Temperature | 
                                            0°C | 
                                        
                                                                            
                                            | Additional Feature | 
                                            CASCADABLE | 
                                        
                                                                            
                                            | Technology | 
                                            TTL | 
                                        
                                                                            
                                            | Terminal Position | 
                                            DUAL | 
                                        
                                                                            
                                            | Terminal Form | 
                                            GULL WING | 
                                        
                                                                            
                                            | Number of Functions | 
                                            1 | 
                                        
                                                                            
                                            | Supply Voltage | 
                                            5V | 
                                        
                                                                            
                                            | Terminal Pitch | 
                                            1.27mm | 
                                        
                                                                            
                                            | Temperature Grade | 
                                            COMMERCIAL | 
                                        
                                                                            
                                            | Max Supply Voltage | 
                                            5.5V | 
                                        
                                                                            
                                            | Min Supply Voltage | 
                                            4.5V | 
                                        
                                                                            
                                            | Number of Bits | 
                                            8 | 
                                        
                                                                            
                                            | Propagation Delay | 
                                            9.5 ns | 
                                        
                                                                            
                                            | Response Time | 
                                            8 ns | 
                                        
                                                                            
                                            | Family | 
                                            F/FAST | 
                                        
                                                                            
                                            | Output Polarity | 
                                            INVERTED | 
                                        
                                                                            
                                            | Logic IC Type | 
                                            IDENTITY COMPARATOR | 
                                        
                                                                            
                                            | High Level Output Current | 
                                            1mA | 
                                        
                                                                            
                                            | Low Level Output Current | 
                                            20mA | 
                                        
                                                                            
                                            | Height Seated (Max) | 
                                            2.65mm | 
                                        
                                                                            
                                            | Width | 
                                            7.5mm | 
                                        
                                                                            
                                            | RoHS Status | 
                                            RoHS Compliant | 
                                        
                                                                            
                                            | Lead Free | 
                                            Lead Free | 
                                        
                                                                                                    
                            
                         
                                                N74F521D Overview
The product is packaged in SO for ease of transportation.The comparator has 20 terminals.With a 5V voltage supply, the comparator can perform multiple demanding tasks.The comparator has a pin count of 20 .Temperature higher than 70°C is not recommended.A temperature below 0°C is not suitable for the device.A comparator is designed to operate at a maximum supply voltage of 5.5V .There is a minimum supply voltage of 4.5V for this comparator.
N74F521D Features
N74F521D Applications
There are a lot of Rochester Electronics N74F521D linear comparators  applications. 
- Wireless Base Stations
 - Building automation
 - Automatic Test Equipment
 - Battery-Powered Electronics
 - Motor drives
 - Infotainment and Clusters
 - DC/DC and AC/DC power supplies
 - Window Comparators
 - Power Supervision
 - Analog front end