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Microchip Technology DSA504RT Six-Output Programmable Clock Generator

Microchip Technology DSA504RT Six-Output Programmable Clock Generator provides radiation-tolerant timing for space, aerospace, and defense systems. This programmable clock generator produces multiple synchronized frequencies from a single external clock reference, helping reduce the need for separate oscillators and buffers in complex spacecraft timing designs. The DSA504RT integrates a low-jitter fractional-divide APLL, two fractional dividers with spread-spectrum capability, two integer dividers, and six configurable output buffers. An internal crosspoint switch routes generated frequencies to any output, while each output can support differential formats or paired single-ended LVCMOS outputs. Microchip Technology DSA504RT also supports PCIe Gen1 to Gen7 compliant outputs and includes I2C configuration for timing control.

Features

  • Low-jitter fractional-divide APLL with spread-spectrum-capable fractional dividers
  • Integrated crosspoint switch for flexible frequency routing to each output
  • Configurable output buffers for differential or paired single-ended operation
  • Six-output any-frequency programmable clock generation
  • Independent output format selection with separate output supplies
  • Standby mode for reduced power use when inactive
  • I2C interface and OTP configuration for autonomous startup

Applications

  • Timing architectures operating during GNSS outages or disruptions
  • Systems using radiation-tolerant or radiation-hardened FPGAs and MCUs
  • Spacecraft timing distribution
  • Aerospace and defense systems
  • Navigation, communications, and scientific instrument timing

Specifications

  • External reference frequency range
    • 10MHz to 250MHz external differential clock
    • 10MHz to 200MHz external LVCMOS clock
  • Output frequency range
    • Differential output 
      • 0.35MHz to 250MHz (LPHCSL)
      • 0.35MHz to 662MHz (LVDS, LVPECL)
    • 0.35mHz to 200MHz LVCMOS output
  • PCIe Gen1 to Gen 7 compliant outputs
  • -55°C to +125°C temperature range
  • 1.71V to 3.63V operating voltage
  • Packages
    • VQFN28, 28-lead thin quad flat no-lead, 4mm x 4mm body size
    • CQFP32, 32-lead ceramic quad flat, 16mm x 16mm body size

Functional Block Diagram

Block Diagram - Microchip Technology DSA504RT Six-Output Programmable Clock Generator
Published: 2026-06-29 | Updated: 2026-06-30