The MAX3270 is a complete clock recovery and data retiming IC for 155Mbps and 622Mbps SDH/SONET and ATM applications.
The MAX3270 IC provides clock recovery and data retiming for 155 Mbps (STM‑1/OC‑3) and 622 Mbps (STM‑4/OC‑12) SDH/SONET and ATM applications. It features differential ECL I/O, a fully integrated PLL with phase‑frequency detector, and an output frequency monitor for lock detection.
The device is supplied in a 44‑pin MQFP package, operates from –40 °C to +85 °C, and requires a +5 V VITL supply and –4.5 V VEE supplies. Pin functions include serial data inputs (SDIP/SDIN), clock‑rate select (CRS), external clock select (EXCS), and loop‑filter pins for external filter components.
| Supported Data Rates | 155 Mbps and 622 Mbps |
|---|---|
| Operating Temperature Range | -40 °C to +85 °C |
| Package Type | 44‑pin MQFP |
| Supply Voltage (VEE) | -4.5 V |
| Output Monitor Function | Provides lock detection |
| Input Interface | Differential ECL |
The MAX3270 supports both 155 Mbps and 622 Mbps data rates.
It operates from –40 °C to +85 °C.
The device is available in a 44‑pin MQFP package.