The 8V19N850 is a fully integrated Radio Unit Clock Synchronizer and Jitter Attenuator designed as a high-performance clock solution for phase/frequency synchronization and signal conditioning of wireless base station radio equipment. The device supports JESD204B/C subclass 0 and 1 device clocks and SYSREF synchronization for converters. The 8V19N850 supports two independent frequency domains: one that can be used for the digital clock (Ethernet and FEC rates) domain with four outputs, and the device clock (RF-PLL) domain with 12 outputs. The Ethernet domain generates frequencies from two independent APLLs for flexibility; the outputs of the RF clock domain generate very low phase noise clocks for ADC/DAC circuits.

From the integrated RF-PLL, the device supports the clock generation of high-frequency device clocks for driving ADC/DAC devices low-frequency synchronization signals (SYSREF). A dual DPLL front-end architecture supports any frequency translation. Each DPLL provides a programmable bandwidth and a DCO function for real-time frequency/phase adjustments. The DPLLs can lock on 1PPS input signals and establish lock within 100s or less. Frequency information can be applied from DPLL-0 to DPLL-1 and vice versa to enable the combining of the frequency characteristics of two references (combo-mode). The 8V19N850 is configured through a pin-mapped I3C (including legacy I2C) and 3/4-wire SPI interface. I2C with master capabilities reads a default configuration from an external ROM device. GPIO ports can be configured for reporting and controlling purposes.

Features

  • Device clock domain (RF-PLL) with support for JESD204B/C
  • Digital clock domain (Ethernet, FEC) with support for eEEC and T-BC/T-TSC Class C
  • 2 differential clock reference inputs with 1PPS (1Hz) to 1GHz input frequency
  • Dual DPLL front-end with independent clock paths
    • External control of the DCO for IEEE1588
    • Digital holdover with a 1.1 × 10-7 ppb accuracy
    • Programmable DPLL loop bandwidth 1mHz - 6kHz
    • Configurable phase delay (range: 1UI)
    • Hitless input switching with < 1ns output phase error
  • Reference monitors for input LOS, activity and frequency
  • 1 external synchronization input for JESD204B/C (LVCMOS)
  • 16 differential outputs
  • Optimized for low phase noise: -146dBc/Hz (1MHz offset; 245.76MHz clock)
  • Supply voltage (core): 3.3V; (outputs): 3.3V, 2.5V, and 1.8V
  • Board temperature range: -40°C to +105°C
  • Applicable Standards
    • ITU-T G.8262 EEC1/2, G.8262.1 eEEC
    • ITU-T G.8273.2 T-BC/T-TSC Class C
    • JESD204B and C

Applications

  • Wireless infrastructure 5G radio

Product Options

Part Number Part Status Pkg. Type DPLL Channels (#) Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
Active VFQFPN 2 88 I Yes Tray
Availability
Active VFQFPN 2 88 I Yes Reel
Availability
Active VFQFPN 2 88 I Yes Reel
Availability

Documentation & Downloads

Title language Type Format File Size Date
Datasheets & Errata
8V19N850D Datasheet Datasheet PDF 1.77 MB
User Guides & Manuals
8V19N850 Evaluation Board Manual Manual PDF 2.66 MB
8V19N850 Hardware Design Guide Guide PDF 401 KB
Application Notes & White Papers
8V19N850 Sysref Phase Deterministic and Phase Align Application Note PDF 261 KB
Frequency Control Word Setting Procedure for 8V19N850D Application Note PDF 41 KB
AN-807 Recommended Crystal Oscillators for Network Synchronization Application Note PDF 148 KB
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 495 KB
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 115 KB
AN-839 RMS Phase Jitter Application Note PDF 233 KB
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.15 MB
AN-815 Understanding Jitter Units Application Note PDF 565 KB
AN-806 Power Supply Noise Rejection Application Note PDF 438 KB
AN-805 Recommended Ferrite Beads Application Note PDF 121 KB
Downloads
Timing Commander Personality File for 8V19N850D (v3.1.0) Software ZIP 5.27 MB
Other
8V19N850D ITU-T G.8262 and G.8262.1 Compliance Test Report Report PDF 2.55 MB
RF Timing Family Product Overview Overview PDF 331 KB
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB

Boards & Kits

Part Number Title Type Company
8V19N850-EVK 8V19N850 Evaluation Kit Evaluation Renesas