The 813N2532I device uses IDT's fourth generation FemtoClock® NG technology for optimal high clock frequency and low phase noise performance, combined with a low power consumption and high power supply noise rejection. The 813N2532I is a PLL based synchronous multiplier that is optimized for PDH or SONET to Ethernet clock jitter attenuation and frequency translation. The 813N2532I is a fully integrated Phase Locked loop utilizing a FemtoClock NG Digital VCXO that provides the low jitter, high frequency SONET/PDH output clock that easily meets OC-48 jitter requirements. This VCXO technology simplifies PLL design by replacing the pullable crystal requirement of analog VCXOs with a fixed 27MHz generator crystal. Jitter attenuation down to 10Hz is provided by an external loop filter. Pre-divider and output divider multiplication ratios are selected using device selection control pins. The multiplication ratios are optimized to support most common clock rates used in PDH, SONET and Ethernet applications. The device requires the use of an external, inexpensive fundamental mode 27MHz crystal. The device is packaged in a space-saving 32-VFQFN package and supports commercial temperature range.

Features

  • Fourth generation FemtoClock® NG technology
  • Two LVPECL output pairs
  • Output frequencies: 19.44MHz, 25MHz, 125MHz, 155.52MHz and 156.25MHz
  • Two differential inputs support the following input types: LVPECL, LVDS, LVHSTL, HCSL
  • Accepts input frequencies from 8kHz to 38.88MHz including 8kHz, 19.44MHz, 25MHz and 38.88MHz
  • Crystal interface optimized for a 27MHz, 10pF parallel resonant crystal
  • Attenuates the phase jitter of the input clock by using a low-cost fundamental mode crystal
  • Customized settings for jitter attenuation and reference tracking using external loop filter connection
  • FemtoClock NG frequency multiplier provides low jitter, high frequency output
  • Absolute pull range: ±100ppm
  • Power supply noise rejection (PSNR): -95dB (typical)
  • RMS phase jitter @ 156.25MHz, using a 27MHz crystal (12kHz - 20MHz): 0.6ps (typical)
  • RMS phase jitter @ 155.52MHz, using a 27MHz crystal (12kHz - 20MHz): 0.622ps (typical)
  • RMS phase jitter @ 125MHz, using a 27MHz crystal (12kHz - 20MHz): 0.6ps (typical)
  • 3.3V supply voltage
  • -40°C to 85°C ambient operating temperature
  • Available in lead-free (RoHS 6) package

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
813N2532CKILF Last Time Buy NLG32P1 VFQFPN 32 I Yes Tray
Availability
813N2532CKILFT Last Time Buy NLG32P1 VFQFPN 32 I Yes Reel
Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
813N2532I Data Sheet Datasheet PDF 457 KB
Application Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 229 KB
AN-831 The Crystal Load curve Application Note PDF 308 KB
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 77 KB
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB
AN-839 RMS Phase Jitter Application Note PDF 149 KB
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 KB
AN-830 Quartz Crystal Drive Level Application Note PDF 59 KB
AN-815 Understanding Jitter Units Application Note PDF 476 KB
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB
AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 52 KB
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB
AN-806 Power Supply Noise Rejection Application Note PDF 353 KB
AN-801 Crystal-High Drive Level Application Note PDF 109 KB
PCNs & PDNs
PCN# : A1904-01 Add Greatek, Taiwan as an Alternate Assembly Facility Product Change Notice PDF 983 KB
PDN# : TP-19-06 Manufacturing Discontinuance Notice Product Discontinuation Notice PDF 1016 KB
PCN# : A1611-02 Add JCET China as Alternate Assembly and Change of Material Set at Alternate Assembly Location Product Change Notice PDF 583 KB
PCN# : A1511-01(R1) Add SPEL India as Alternate Assembly Location Product Change Notice PDF 596 KB
PCN# : A1511-01 Add SPEL India as Alternate Assembly Location Product Change Notice PDF 544 KB
PCN# : W1308-01 Change of Passivation Thickness Product Change Notice PDF 941 KB
Other
Timing Solutions Products Overview Overview PDF 4.11 MB
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB

Software & Tools

Title Other Languages Type Format File Size Date
813N2532I IBIS Model Model - IBIS ZIP 72 KB