Datasheet4U Logo Datasheet4U.com

ACS1790T Datasheet PLL Frequency Synthesizer

Manufacturer: SEMTECH

Overview

SCL SDA A0 FBCLK A1 VDDD2 ADVANCED COMMUNICATIONS PRODUCT GROUP Introduction The ACS1790T is a high-performance, low phase noise, programmable frequency synthesizer with ultra-fine dynamic output frequency control.

It can be used as a companion to a compatible ToPSync™ device to generate outputs locked to an external reference source or standalone for standard frequency generation for common applications.

The circuit includes an integrated VCO, loop filter, phase-and-frequency detector and output dividers.

Key Features

  • Optimised for Synchronous Ethernet, SONET and SDH operation.
  • Meets RMS jitter requirements of Gigabit Ethernet, 10 Gigabit Ethernet and OC-48 / STM16.
  • Default options for 25 MHz & 125 MHz or 25 MHz & 156.25 MHz outputs at reset.
  • High frequency LVPECL output: 10 MHz.
  • 200 MHz, 1 ppb step.
  • Low frequency LVCMOS output: 2 kHz.
  • 125 MHz 1.8V, 2.5V and 3.3V operation.
  • Very-low frequency feedback clock output for connection to ToPSync® or external PFD.