MAX3991UTG+T

Overview

The MAX3991UTG+T is a clock and data recovery (CDR) integrated circuit designed for SONET/SDH and XFP optical receiver applications. It features a single CML input and two CML outputs with a 1:2 ratio, operating at frequencies up to 693.5MHz. The device functions within a supply voltage range of 3V to 3.6V and includes an internal PLL. It is housed in a 24-TQFN package with exposed pads, suitable for surface mount installation across an operating temperature range of 0°C to +85°C.

Feature Summary

• Integrated Clock and Data Recovery (CDR) with built-in amplifier
• Supports data rates up to 693.5MHz for SONET/SDH and XFP standards
• Single CML input drives dual CML outputs via 1:2 ratio
• Internal Phase-Locked Loop (PLL) for signal regeneration

Applications

• SONET/SDH optical receivers
• XFP form factor optical transceivers
• High-speed serial data recovery circuits

Procurement Notes

Verify the specific suffix 'T' against official Analog Devices documentation to confirm tape-and-reel packaging versus bulk tube availability. Confirm RoHS compliance status and lead times directly with authorized distributors, as this component may be subject to end-of-life or discontinuation notices.

Selection Notes

Select this component when designing optical receivers requiring CDR functionality with differential CML interfaces. Ensure the design supports the 3V to 3.6V supply range and accommodates the thermal requirements of the 24-TQFN package. Verify that the target application frequency does not exceed the 693.5MHz maximum specification.

Part Context

This part belongs to the MAX3991 series of clock and data recovery ICs from Maxim Integrated, now part of Analog Devices. It is specifically engineered for high-speed optical communication systems, providing signal integrity restoration for SONET/SDH protocols.

Replacement Considerations

Check for direct pin-compatible replacements within the MAX3991 family or updated generations from Analog Devices. Verify interface compatibility (CML) and electrical specifications before substituting.