Overview

The 343 is a low cost, triple-output, field programmable clock synthesizer. The 343 can generate three output frequencies from 250 kHz to 200 MHz, using up to three independently configurable PLLs. The outputs may employ Spread Spectrum techniques to reduce system electro-magnetic interference (EMI). Using IDT's VersaClock™ software to configure the PLL and output, the 343 contains a One-Time Programmable (OTP) ROM to allow field programmability. Using Phase-Locked Loop (PLL) techniques, the device runs from a standard fundamental mode, inexpensive crystal, or clock. It can replace multiple crystals and oscillators, saving board space and cost. The device also has a power down feature that tri-states the clock outputs and turns off the PLLs when the PDTS pin is taken low. The 343 is also available in factory-programmed custom versions for high-volume applications.

343 - Block Diagram
343 - Pinout
343 - Block Diagram
343 - Pinout
  • 8-pin SOIC package (Pb-free)
  • Highly accurate frequency generation
  • M/N Multiplier PLL: M = 1...2048, N = 1...1024
  • Output clock frequencies up to 200 MHz
  • Spread spectrum capability for lower system EMI

Documentation

Design & Development

Software Downloads
Type Title Date
Software & Tools - Software
VersaClock II Desktop Software Setup
Log in to Download ZIP 6.24 MB
1 item

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
    343MIPLF
    circleObsolete
    memory
    view_in_ar
    		SOIC 8 I Yes Tube
    343MIPLFT
    circleObsolete
    memory
    view_in_ar
    		SOIC 8 I Yes Reel
    343MPLF
    circleObsolete
    memory
    view_in_ar
    		SOIC 8 C Yes Tube
    343MPLFT
    circleObsolete
    memory
    view_in_ar
    		SOIC 8 C Yes Reel
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