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844031-01

Obsolete

FemtoClock Crystal-to-LVDS Clock Generator

844031-01 Final Data Sheet
NOTICE - The following device(s) are recommended alternatives:
8T49N242 - FemtoClock NG Universal Frequency Translator

Overview

The 844031-01 is an Ethernet clock generator and a member of the HiPerClocks™ family of high performance devices. The 844031-01 uses an 18pF parallel resonant crystal over the range of 19.6MHz - 27.2MHz. For Ethernet applications, a 25MHz crystal is used to generate 312.5MHz. The 844031-01 has excellent <1ps phase jitter performance, over the 1.875MHz - 20MHz integration range. The 844031- 01 is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space.

844031-01 - Block Diagram
844031-01 - Pinout
844031-01 - Block Diagram
844031-01 - Pinout
  • One differential LVDS output
  • Crystal oscillator interface, 18pF parallel resonant crystal (19.6MHz - 27.2MHz)
  • Output frequency range: 245MHz - 340MHz
  • VCO range: 490MHz - 680MHz
  • RMS phase jitter at 312.5MHz, using a 25MHz crystal (1.875MHz - 20MHz): 0.53ps (typical)
  • 3.3V or 2.5V operating supply
  • 0 °C to 70 °C ambient operating temperature
  • Available in both standard (RoHS 5) and lead-free (RoHS 6) packages

Documentation

Design & Development

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.

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Diagram of ECAD Models

Models
Type Title Date
Model - IBIS
844031-01 IBIS Model
ZIP 63 KB
1 item

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