IDT5T940-10NLGI

Overview

The IDT5T940-10NLGI is a precision clock generator designed for OC-192 applications, manufactured by Renesas Electronics Corporation. It operates within an industrial temperature range of -40°C to +85°C and utilizes a 28-VFQFPN (6x6 mm) package with an exposed pad. The device supports differential LVDS or single-ended LVTTL inputs and provides differential LVDS outputs. Key electrical parameters include a supply voltage range of 2.375V to 3.465V and a maximum output frequency of 666.52MHz. It features selectable loop bandwidths, hitless switchover between redundant clocks, and power-down mode capabilities.

Feature Summary

• Supports SONET/SDH (OC-192), Gigabit Ethernet, and 10GE optical/copper input frequencies up to 666.52MHz.
• Provides differential LVDS outputs with jitter generation as low as 0.3ps RMS at high frequencies.
• Features hitless switchover mechanism allowing seamless transition between primary (CLKIN) and backup (REFIN) clock sources.
• Includes configurable PLL bandwidth settings and three modes for output frequency range selection via SELmode pin.

Applications

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

Procurement Notes

Verify the component's authenticity through authorized channels, as this part has reached its last time buy expiration date. Confirm that the specific ordering suffix matches the required LVDS output configuration. Ensure the supplier can provide traceability documentation consistent with Renesas Electronics Corporation manufacturing standards.

Selection Notes

Select the IDT5T940-10NLGI when LVDS outputs are specifically required for the application; the IDT5T940-30 variant offers LVPECL outputs instead. Consider the device's ability to handle redundant clock inputs if system reliability during clock failure is a priority. Verify that the input frequency requirements align with the supported ranges for SONET FEC/non-FEC or 10GE standards.

Part Context

This component belongs to the IDT5T940 series of precision clock generators. It is part of Renesas Electronics Corporation's portfolio following the acquisition of Integrated Device Technology. The device is engineered to meet strict timing requirements for high-speed telecommunications infrastructure, specifically targeting OC-192 performance levels.

Replacement Considerations

The datasheet explicitly identifies the 8T49N222B-dddNLGI as a replacement part for the IDT5T940 series. Designers should evaluate the new component's pinout compatibility and electrical specifications before implementation.