CDCM61004RHB - 1:4 Ultra Low Jitter Crystal-In Clock Generator

The CDCM61004 is a highly versatile, low-jitter frequency synthesizer that can generate four low-jitter clock outputs, selectable between low-voltage positive emitter coupled logic (LVPECL), low-voltage differential signaling (LVDS), or low-voltage complementary metal oxide semiconductor (LVCMOS) outputs, from a low-frequency crystal ot LVCMOS input for a variety of wireline and data communication applications.

The CDCM61004 features an onboard PLL that can be easily configured solely through control pins. The overall output random jitter performance is less than 1ps, RMS (10 kHz...20 MHz), making this device a perfect choice for use in demanding applications such as SONET, Ethernet, Fibre Channel, and SAN.

Key Features

One Crystal/LVCMOS reference input including 24.8832 MHz, 25 MHz, and 26.5625 MHz
Input frequency range: 21.875...28.47 MHz
On-chip VCO operates in frequency range of 1.75...2.05 GHz
4x output available:
- Pin-selectable between LVPECL, LVDS, or 2-LVCMOS; operates at 3.3 V
LVCMOS bypass output available
Output frequency selectable by /1, /2, /3, /4, /6, /8 from a single output divider
Supports common LVPECL/LVDS output frequencies:
- 62.5 MHz, 74.25 MHz, 75 MHz, 77.76 MHz, 100 MHz, 106.25 MHz, 125 MHz, 150 MHz, 155.52 MHz, 156.25 MHz, 159.375 MHz, 187.5 MHz, 200 MHz, 212.5 MHz,250 MHz, 311.04 MHz, 312.5 MHz, 622.08 MHz, 625 MHz
Supports common LVCMOS output frequencies:
- 62.5 MHz, 74.25 MHz, 75 MHz, 77.76 MHz, 100 MHz, 106.25 MHz, 125 MHz, 150 MHz, 155.52 MHz, 156.25 MHz, 159.375 MHz, 187.5 MHz, 200 MHz, 212.5 MHz, 250 MHz
Output frequency range: 43.75...683.264 MHz
Internal PLL loop bandwidth: 400 kHz
High-performance PLL core:
- Phase noise typically at -146 dBc/Hz at 5 MHz offset for 625 MHz LVPECL output
- Random jitter typically at 0.509 ps, RMS (10 kHz...20 MHz) for 625 MHz LVPECL output
Output duty cycle corrected to 50% (± 5%)
Low output skew of 30 ps on LVPECL outputs
Divider programming using control pins:
- Two pins for prescaler/feedback divider