Maxim Integrated Products Inc. introduced the MAX3872/MAX3874 +3.3V multi-rate clock and data recovery (CDR) with an integrated limiting amplifier.

Manufactured using Maxim's second-generation in-house silicon germanium (SiGe) process, the MAX3872/MAX3874 have a small footprint, low power consumption, and loopback capability for system diagnostic testing. These devices are ideal for SONET/SDH receivers and regenerators, add/drop multiplexers, and DWDM transmission equipment.

The MAX3872 operates at all SONET rates from 155 Mbits/sec up to 2.7 Gbits/sec, as well as Ethernet data rates at 1.25/2.5 Gbits/sec. The MAX3874 is a dual-rate CDR operating at 2.488 Gbits/sec and 2.7 Gbits/sec for SONET applications. The MAX3872 and MAX3874 do not require an external-reference clock to recover the data from an input signal.

Operating from a single +3.3-volt supply, the MAX3872/MAX3874 feature 10mV input sensitivity and exceed ANSI, ITU, and Bellcore SONET/SDH jitter specifications. The devices generates only 2.7 m unit interval root mean square jitter and have 0.65 unit interval peak-to-peak high-frequency jitter tolerance. The MAX3872 and MAX3874 have a clock holdover capability when using a selectable-external reference clock. Other features include an adjustable-threshold range and an 800-mV peak-to-peak output-voltage swing.

The MAX3872/MAX3874 are available in a 5mm x 5mm 32-pin QFN package over the extended-temperature range (-40 degrees Celsius to +85 degrees Celsius). Prices for the MAX3872 start at $39.00 and $28.00 for the MAX3874 (1000-up, FOB USA). An evaluation kit is available to speed design.