Overview

The 501B Loco™ is the most cost effective way to generate a high-quality clock output from a lower frequency crystal or clock input. The name LOCO stands for Low Cost Oscillator, as it is designed to replace crystal oscillators in most electronic systems. Using Phase-Locked Loop (PLL) techniques, the device uses a standard fundamental mode, inexpensive crystal to produce output clocks up to 15 MHz. Stored in the chip's ROM is the ability to generate nine different multiplication factors, allowing one chip to output many common frequencies (see table on page 2). The device also has an output enable pin which tri-states the clock output when the OE pin is taken low. This product is intended for clock generation. It has low output jitter (variation in the output period), but input to output skew and jitter are not defined or guaranteed. For applications which require defined input to output skew, use the 570B.

501B - Block Diagram
501B - Block Diagram
  • Packaged as 8 pin SOIC or die
  • Pb (lead) free package
  • IDT's lowest cost PLL clock
  • Zero ppm multiplication error
  • Output clock frequencies up to 15 MHz
  • Extremely low jitter of 25 ps (one sigma)
  • Compatible with popular CPUs
  • Duty cycle of 45/55 up to 20 MHz
  • Nine selectable frequencies
  • Operating voltage of 3.3 V or 5.5 V
  • Tri-state output for board level testing
  • 25 mA drive capability at TTL levels
  • Ideal for oscillator replacement
  • Industrial temperature version available
  • Advanced, low-power CMOS process

Documentation

Design & Development

ECAD Models

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

Explore ECAD Models
Diagram of ECAD Models

Product Options

    Processing table
    Pkg. Type
    Lead Count (#)
    Temp. Grade
    Pb (Lead) Free
    Carrier Type
    Buy / Sample
    Part Number
    501BMILF
    circleObsolete
    memory
    view_in_ar
    		SOIC 8 I Yes Tube
    501BMILFT
    circleObsolete
    memory
    view_in_ar
    		SOIC 8 I Yes Reel
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