| Parameters | 
                                                                                                            
                                            | Terminal Position | QUAD | 
                                                                            
                                            | Supply Voltage | 3.3V | 
                                                                            
                                            | Terminal Pitch | 0.5mm | 
                                                                            
                                            | JESD-30 Code | S-XQCC-N40 | 
                                                                            
                                            | Function | Subscriber Line Interface Concept (SLIC) | 
                                                                            
                                            | Operating Temperature (Max) | 85°C | 
                                                                            
                                            | Operating Temperature (Min) | -40°C | 
                                                                            
                                            | Operating Supply Voltage | 3.3V | 
                                                                            
                                            | Temperature Grade | INDUSTRIAL | 
                                                                            
                                            | Interface | Serial | 
                                                                            
                                            | Number of Circuits | 2 | 
                                                                            
                                            | Height Seated (Max) | 1mm | 
                                                                            
                                            | Length | 6mm | 
                                                                            
                                            | Width | 6mm | 
                                                                            
                                            | Radiation Hardening | No | 
                                                                            
                                            | RoHS Status | ROHS3 Compliant | 
                                                                            
                                            | Factory Lead Time | 8 Weeks | 
                                                                            
                                            | Lifecycle Status | IN PRODUCTION (Last Updated: 1 month ago) | 
                                                                            
                                            | Mount | Surface Mount | 
                                                                            
                                            | Mounting Type | Surface Mount | 
                                                                            
                                            | Package / Case | QFN | 
                                                                            
                                            | Supplier Device Package | 40-QFN | 
                                                                            
                                            | Packaging | Tape & Reel (TR) | 
                                                                            
                                            | Part Status | Active | 
                                                                            
                                            | Moisture Sensitivity Level (MSL) | 3 (168 Hours) | 
                                                                            
                                            | Number of Terminations | 40 | 
                                                                                                    
                            
                         
                                                LE9540CUQCT Overview
Board space can be saved by using the QFN package.The way of Tape & Reel (TR) is employed for telecommunications equipment packing.Surface Mount is used as telecommunications equipment mounting type.2 circuits make up this  telecom IC .Mounted in Surface Mount-direction.There are 40 terminations can be found in telecom switching configuration.The voltage it operates at is 3.3V.With the voltage of 3.3V as its supply voltage, designers have a great deal of flexibility.The maximum operating temperature is 85°C.A minimum operating temperature of -40°C is supported.
LE9540CUQCT Features
Available in the QFN package
Operating supply voltage of 3.3V
LE9540CUQCT Applications
There are a lot of Microchip Technology LE9540CUQCT Telecom applications. 
- Central office
- Channel Service Units (CSUs): T1/E1/J1 
- Fiber Optic Terminals
- Interfaces to SONET STS-1 Networks
- T1 Digital Cross Connects (DSX-1)
- SONET/SDH terminal 
- Digital Cross-Connect Systems
- Set-Top Box
- Fiber to the Home (FTTH)
- Wireless base stations