| PartNumber | DS21554LB+ | DS21554LB | DS21554LBN+ |
| Description | Telecom Interface ICs 3.3/5V E1 Transceiver | Telecom Interface ICs 3.3/5V E1 Transceiver | Network Controller & Processor ICs 3.3/5V E1 Transceive |
| Manufacturer | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Product Category | Telecom Interface ICs | Telecom Interface ICs | Interface - Telecom |
| RoHS | Y | - | - |
| Product | E1 Line Interface Units - LIUs | E1 Line Interface Units - LIUs | E1 Line Interface Units - LIUs |
| Supply Voltage Max | 5.25 V | 5.25 V | - |
| Supply Voltage Min | 4.75 V | 4.75 V | - |
| Minimum Operating Temperature | 0 C | 0 C | - 40 C |
| Maximum Operating Temperature | + 70 C | + 70 C | + 85 C |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | LQFP-100 | LQFP-100 | - |
| Packaging | Tube | Tube | Tray |
| Data Rate | 1.544 Mb/s | 1.544 Mb/s | 1.544 Mbps |
| Series | DS21554LB | DS21554LB | DS21554LBN |
| Brand | Maxim Integrated | Maxim Integrated | - |
| Number of Channels | 1 Channel | 1 Channel | 1 Channel |
| Moisture Sensitive | Yes | Yes | - |
| Operating Supply Voltage | 5 V | 5 V | 5 V |
| Product Type | Telecom Interface ICs | Telecom Interface ICs | - |
| Factory Pack Quantity | 20 | 90 | - |
| Subcategory | Interface ICs | Interface ICs | - |
| Part # Aliases | 90-21554+LB0 DS21554LB | - | 90-21554+LBN |
| Unit Weight | 0.046530 oz | 0.046530 oz | 0.046530 oz |
| Package Case | - | - | LQFP-100 |
| Operating Temperature | - | - | -40°C ~ 85°C |
| Mounting Type | - | - | Surface Mount |
| Function | - | - | Single-Chip Transceiver |
| Interface | - | - | E1, HDLC, J1, T1 |
| Voltage Supply | - | - | 4.75 V ~ 5.25 V |
| Supplier Device Package | - | - | 100-LQFP (14x14) |
| Number of Circuits | - | - | 1 |
| Power Watts | - | - | - |
| Current Supply | - | - | 75mA |
| Supply Voltage Max | - | - | 5.25 V |
| Supply Voltage Min | - | - | 4.75 V |