概要

The 271 field programmable VCXO clock synthesizer generates up to six high-quality, high-frequency clock outputs including multiple reference clocks from a low-frequency crystal input. It is designed to replace crystals and crystal oscillators in most electronic systems. Using IDT's VersaClockTM software to configure PLLs and outputs, the 271 contains a One-Time Programmable (OTP) ROM for field programmability. Programming features include VCXO, eight selectable configuration registers and up to two sets of three low-skew outputs. Each of the two output groups are powered by a separate VDDO voltage. VDDO may vary from 1.8 V to VDD. Using Phase-Locked Loop (PLL) techniques, the device runs from a standard fundamental mode, inexpensive crystal, or clock. It can replace VCXOs, multiple crystals and oscillators, saving board space and cost. The 271 is also available in factory programmed custom versions for high-volume applications.

271 - Block Diagram
271 - Pinout
271 - Block Diagram
271 - Pinout
  • Packaged as 20-pin TSSOP – Pb-free, RoHS compliant
  • Eight addressable registers
  • Replaces multiple crystals and oscillators
  • Output frequencies up to 200 MHz at 3.3 V
  • Input crystal frequency of 5 to 27 MHz
  • Up to six reference outputs
  • Separate 1.8 to 3.3 V VDDO output level controls for each bank of 3 outputs
  • Up to two sets of three low-skew outputs
  • Operating voltages of 3.3 V
  • Controllable output drive levels
  • Advanced, low-power CMOS process

ドキュメント

設計・開発

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VersaClock II Desktop Software Setup
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1 item

ECADモデル

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Diagram of ECAD Models

製品選択

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    Processing table
    Pkg. Type
    Lead Count (#)
    Temp. Grade
    Pb (Lead) Free
    Carrier Type
    ご購入 / サンプル
    型名
    271PGILF
    circle廃止品
    memory
    view_in_ar
    		TSSOP 20 I Yes Tube
    271PGILFT
    circle廃止品
    memory
    view_in_ar
    		TSSOP 20 I Yes Reel
    271PGLF
    circle廃止品
    memory
    view_in_ar
    		TSSOP 20 C Yes Tube
    271PGLFT
    circle廃止品
    memory
    view_in_ar
    		TSSOP 20 C Yes Reel
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