DS1181LE+T

Overview

The DS1181LE+T is a spread-spectrum clock modulator IC designed to reduce electromagnetic interference (EMI) in digital electronic equipment. It accepts an input clock signal between 20MHz and 134MHz and delivers a center-dithered output via an integrated phase-locked loop. The device operates on a single 3V to 3.6V supply, features LVCMOS output, and supports selectable modulation magnitudes of ±0.5%, ±1.0%, ±1.5%, or ±2.0%. Packaged in an 8-TSSOP format, it functions within a temperature range of -40°C to +125°C.

Feature Summary

• Modulates 20MHz to 134MHz clocks with center dithering
• Selectable spread-spectrum magnitudes: ±0.5%, ±1.0%, ±1.5%, ±2.0%
• Low cycle-to-cycle jitter of 75ps typical
• Pin-compatible with Alliance/PulseCore Semiconductor P2040 series

Applications

• LCD panels for TVs, desktop monitors, notebook, and tablet PCs
• Printers

Procurement Notes

Verify the 'T' suffix indicates tape-and-reel packaging. Confirm RoHS compliance status as indicated by the '+' designation. Check current availability as this component may be subject to discontinuation notices from Analog Devices/Maxim Integrated.

Selection Notes

Select based on required EMI attenuation levels corresponding to specific dither magnitudes. Ensure input clock frequency falls within the 20MHz to 134MHz operational range. Verify that the 8-TSSOP package dimensions fit the target PCB layout constraints.

Part Context

This part belongs to the DS1181L family of spread-spectrum clock modulators. The 'LE+' prefix denotes lead-free/RoHS-compliant construction suitable for automotive temperature ranges (-40°C to +125°C). The 'T' suffix specifically identifies the reel packaging variant.

Replacement Considerations

The datasheet notes pin compatibility with the Alliance/PulseCore Semiconductor P2040 series devices.