IDT5T940-30NLGI

Overview

The IDT5T940-30NLGI is a precision clock generator designed for OC-192 applications, including SONET/SDH and Gigabit Ethernet systems. It operates within an industrial temperature range of -40°C to +85°C and accepts a supply voltage between 2.375V and 3.465V. The device features LVPECL outputs and supports input frequencies ranging from 19.44MHz to 666.52MHz. It provides multiplied output on QOUT (up to 666.52MHz) and regenerated clock output on QREG. Key functional capabilities include hitless switchover between redundant inputs, selectable loop bandwidths, and power-down modes.

Feature Summary

• Supports SONET non-FEC, FEC, 10GE copper, and 10GE optical input frequency standards
• Provides hitless switchover mechanism for redundant clock inputs (CLKIN and REFIN)
• Features selectable PLL bandwidths and three output frequency range modes via SELmode pin
• Includes lock indicator and power-down control functionality

Applications

• Terabit routers
• SONET / SDH systems
• Gigabit ethernet systems
• Digital cross connects
• Optical transceiver modules

Procurement Notes

Verify the specific suffix '30' confirms LVPECL output configuration, as the '-10' variant utilizes LVDS. Confirm package type matches the 28-VFQFPN (6x6mm) specification with exposed pad. Ensure compatibility with the 2.375V to 3.465V supply voltage range required for proper operation.

Selection Notes

Select this component when precise clock generation for OC-192 SONET/SDH or Gigabit Ethernet is required. Choose the '-30' suffix specifically for LVPECL output interfaces. Consider the available input frequency ranges (19.44MHz to 666.52MHz) and the need for redundant clock input support with automatic glitch-free switching.

Part Context

This device belongs to the IDT5T940 series of precision clock generators. It is manufactured by Integrated Device Technology, Inc., which is now part of Renesas Electronics Corporation. The product was originally distributed under the IDT brand before corporate integration.

Replacement Considerations

The datasheet explicitly recommends using the 8T49N222B-dddNLGI as a replacement part.