| Parameters | 
                                                                                                            
                                            | Mount | Surface Mount | 
                                                                            
                                            | Mounting Type | Surface Mount | 
                                                                            
                                            | Package / Case | 256-BGA | 
                                                                            
                                            | Number of Pins | 256 | 
                                                                            
                                            | Packaging | Tray | 
                                                                            
                                            | Published | 1998 | 
                                                                            
                                            | Pbfree Code | yes | 
                                                                            
                                            | Part Status | Obsolete | 
                                                                            
                                            | Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 
                                                                            
                                            | Voltage - Supply | 3.3V | 
                                                                            
                                            | Base Part Number | DS21Q354 | 
                                                                            
                                            | Function | Transceiver | 
                                                                            
                                            | Operating Supply Voltage | 3.3V | 
                                                                            
                                            | Interface | E1 | 
                                                                            
                                            | Number of Transceivers | 4 | 
                                                                            
                                            | Radiation Hardening | No | 
                                                                            
                                            | RoHS Status | Non-RoHS Compliant | 
                                                                            
                                            | Lead Free | Lead Free | 
                                                                                                    
                            
                         
                                                DS21Q354B Overview
In order to save space on the board, 256-BGA packages are used.Telecommunications equipment is packed using the Tray method.Telecommunications equipment is mounted using Surface Mount.The supply voltage of 3.3V can increase efficiency.Telecom switching is mounted in a Surface Mount-direction.Telecom interfaces contain 256 pins.DS21Q354 is the base part number, which can be used to find more related parts.For designers, it offers a wide range of flexibility as it operates with the supply voltage of 3.3V.A 4 transceiver is incorporated into telecommunication tools.
DS21Q354B Features
Available in the 256-BGA package
Operating supply voltage of 3.3V
4 transceivers
DS21Q354B Applications
There are a lot of Maxim Integrated DS21Q354B Telecom applications. 
- T3 channelized access concentrators 
- Fiber to the Home (FTTH)
- T1/E1/J1 Multiplexer and Channel Banks
- Switching Systems
- Frame Relay Switches and Access Devices (FRADS)
- Multiplexers
- Digital Cross-connect Systems (DCS)
- Public switching systems 
- Cable Telephony
- T1/E1/J1 add/drop multiplexers (MUX)