| Parameters | 
                                                                                                            
                                            | Mounting Type | Surface Mount | 
                                                                            
                                            | Package / Case | 48-FSOP (0.154, 3.90mm Width) | 
                                                                            
                                            | Operating Temperature | -40°C~85°C | 
                                                                            
                                            | Packaging | Tape & Reel (TR) | 
                                                                            
                                            | Part Status | Obsolete | 
                                                                            
                                            | Moisture Sensitivity Level (MSL) | 1  (Unlimited) | 
                                                                            
                                            | Type | Multiplexer/Demultiplexer | 
                                                                            
                                            | Voltage - Supply | 4V~5.5V | 
                                                                            
                                            | Base Part Number | FST33X257 | 
                                                                            
                                            | Circuit | 1 x 8:4 | 
                                                                            
                                            | Voltage Supply Source | Single Supply | 
                                                                            
                                            | Independent Circuits | 3 | 
                                                                                                    
                            
                         
                                                FST33X257QSPX Overview
Due to the fact that it is provided in the 48-FSOP (0.154, 3.90mm Width), digital switch allows the board to be compacted.It is packaged according to the Tape & Reel (TR) method.As far as mounting is concerned, digital switch ic uses Surface Mount.The analog IC in the multiplexers is identified as Multiplexer/Demultiplexer.A temperature of -40°C~85°C will not leave the turn signal swturn signal switchch susceptible to external influences.With a supply voltage of 4V~5.5V, designers have greater flexibility of digital controlled switch.There is a base part number FST33X257 that can be used to locate signal switch's related components as well.
FST33X257QSPX Features
Supplied in the 48-FSOP (0.154, 3.90mm Width) package
FST33X257QSPX Applications
There are a lot of ON Semiconductor FST33X257QSPX Signal Switches / Multiplexers / Decoders applications. 
- Night vision cameras
- Microprocessor instruction decoding
- VGA
- Audio transmission 
- Computer memory
- Electronic circuits
- Decimal decoder
- Arithmetic Logic Units
- Video transmission
- War field flying robot with a night vision flying camera