PCIe Gen4 Compliant Ultra-Low Power Clock Generator With Four Programmable Outputs and EEPROM - CDCI6214

CDCI6214 (ACTIVE)

PCIe Gen4 Compliant Ultra-Low Power Clock Generator With Four Programmable Outputs and EEPROM

 

Description

The CDCI6214 device is an ultra-low power clock generator. The device selects between two independent reference inputs to a phase-locked loop and generates up to four different frequencies on configurable differential output channels and also a copy of the reference clock on a LVCMOS output channel.

Each of the four output channels has a configurable integer / fractional output divider and a dedicated integer divider. Together with the output muxes, this allows up to five different frequencies. Clock distribution dividers are reset in a deterministic way for clean clock gating and glitch-less update capability. Flexible power-down options allow to optimize the device for lowest power consumption in active and standby operation. Typically four 156.25 MHz LVDS outputs consume 150 mW at 1.8V. Typical RMS jitter of 386 fs for 100 MHz HCSL output enhances system margin for PCIe applications.

The CDCI6214 is configured using internal registers that are accessed by an I2C-compatible serial interface and internal EEPROM.

The CDCI6214 enables high-performance clock trees from a single reference at ultra-low power with a small footprint. The factory- and user-programmable EEPROM make the CDCI6214 ideal as easy-to-use, instant-on clocking solution with low power consumption.

Features

  • One Configurable High Performance, Low-Power PLL With 4 Programmable Outputs
  • RMS Jitter Performance
    • Supports PCIe Gen1 / Gen2 / Gen3 / Gen4 (typ. 386 fs)
  • Typical Power Consumption: 150 mW at 1.8 V(2)
  • Universal Clock Input
    • Differential AC-Coupled or LVCMOS: 1 MHz to 250 MHz
    • Crystal: 8 MHz to 50 MHz
  • Flexible Output Frequencies
    • 44.1 kHz to 350 MHz
    • Glitch-Less Output Divider Switching
    • Spread Spectrum Clocking (SSC) for PCIe
  • Four Individually Configurable Outputs
    • LVCMOS, LVDS or HCSL
    • Differential AC-Coupled With Programmable Swing (LVDS-, CML-, LVPECL-Compatible)
  • Fully Integrated PLL, Configurable Loop Bandwidth: 100 kHz to 3 MHz
  • Single or Mixed Supply Operation for Level Translation: 1.8 V, 2.5 V and 3.3 V
  • Configurable GPIOs
    • Status Signals
    • Up to 4 Individual Output Enables
    • Output Divider Synchronization
  • Flexible Configuration Options
    • I2C-Compatible Interface: Up to 400 kHz
    • Integrated EEPROM With Two Pages and External Select Pin
  • Industrial Temperature Range: –40ºC to 85ºC
  • Small Footprint: 24-Pin VQFN (4 mm × 4 mm)

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Parametrics Compare all products in Low Jitter <1psec RMS

 
Input Level
Number of Outputs
Output Frequency (Max) (MHz)
Output Level
Pin/Package
Operating Temperature Range (C)
Features
VCC Out (V)
Programmability
CDCI6214
XTAL   
4   
350   
LVCMOS
LVDS
LVPECL   
24VQFN   
-40 to 85   
I2C
Pin Programming   
1.8
2.5
3.3   
EEPROM
Pin configuration
Serial Interface   

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