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| PartNumber | DS21Q554BN+ | DS21Q554B | DS21Q554 |
| Description | Telecom Interface ICs Quad E1 Transceiver | Telecom Interface ICs Quad E1 Transceiver | Network Controller & Processor ICs Quad E1 Transceive |
| Manufacturer | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Product Category | Telecom Interface ICs | Telecom Interface ICs | Interface - Telecom |
| RoHS | Y | - | - |
| Product | T1/E1 Line Interface Units - LIUs | T1/E1 Line Interface Units - LIUs | T1/E1 Line Interface Units - LIUs |
| Packaging | Tube | Tube | Tray |
| Series | DS21Q554BN | DS21Q554B | DS21Q554 |
| Brand | Maxim Integrated | Maxim Integrated | - |
| Number of Channels | 4 Channel | 4 Channel | 4 Channel |
| Product Type | Telecom Interface ICs | Telecom Interface ICs | - |
| Factory Pack Quantity | 40 | 40 | - |
| Subcategory | Interface ICs | Interface ICs | - |
| Part # Aliases | 90-21Q55+4BN DS21Q554BN | 90-21Q55-4B0 DS21Q554B | 90-21Q55-400 |
| Mounting Style | - | SMD/SMT | SMD/SMT |
| Package / Case | - | BGA | - |
| Moisture Sensitive | - | Yes | - |
| Operating Supply Voltage | - | 5 V | 5 V |
| Package Case | - | - | BGA |
| Operating Temperature | - | - | - |
| Mounting Type | - | - | Surface Mount |
| Function | - | - | Transceiver |
| Interface | - | - | E1 |
| Voltage Supply | - | - | 5V |
| Supplier Device Package | - | - | 256-BGA (27x27) |
| Number of Circuits | - | - | 4 |
| Power Watts | - | - | - |
| Current Supply | - | - | - |