The 813N322I-02 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 813N322I-02 is a PLL based synchronous multiplier that is optimized for Ethernet to SONET/PDH clock jitter attenuation and frequency translation. The 813N322I-02 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 industrial temperature range.

Features

  • Fourth Generation FemtoClock® NG technology
  • Two LVPECL output pairs
  • Each output supports independent frequency selection at 19.44MHz, 77.76MHz, 155.52MHz and 622.08MHz
  • Two differential inputs support the following input types: LVPECL, LVDS, LVHSTL, HCSL
  • Accepts input frequencies from 8kHz to 156.25MHz including 8kHz,19.44MHz, 25MHz, 62.5MHz, 77.76MHz, 125MHz, 155.52MHz and 156.25MHz
  • Crystal interface designed 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 an external loop filter connection
  • FemtoClock NG frequency multiplier provides low jitter, high frequency output
  • Absolute pull range: ±50ppm
  • Power supply noise rejection (PSNR): -95dB (typical)
  • FemtoClock NG VCXO frequency: 2488.32MHz
  • RMS phase jitter @ 155.52MHz, using a 27MHz crystal (12kHz '- 20MHz): 0.674ps (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
813N322AKI-02LF Obsolete NLG32 VFQFPN 32 I Yes Tray
Availability
813N322AKI-02LFT Obsolete NLG32 VFQFPN 32 I Yes Reel
Availability
813N322CKI-02LF Obsolete NLG32P1 VFQFPN 32 I Yes Tray
Availability
813N322CKI-02LFT Obsolete NLG32P1 VFQFPN 32 I Yes Reel
Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
813N322I-02 Final Data Sheet Datasheet PDF 620 KB
Application Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 322 KB
AN-831 The Crystal Load curve Application Note PDF 395 KB
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 495 KB
AN-840 Jitter Specifications for Timing Signals Application Note PDF 442 KB
AN-839 RMS Phase Jitter Application Note PDF 233 KB
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 115 KB
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 120 KB
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 160 KB
AN-830 Quartz Crystal Drive Level Application Note PDF 143 KB
AN-815 Understanding Jitter Units Application Note PDF 565 KB
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.15 MB
AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 136 KB
AN-806 Power Supply Noise Rejection Application Note PDF 438 KB
AN-805 Recommended Ferrite Beads Application Note PDF 121 KB
AN-801 Crystal-High Drive Level Application Note PDF 202 KB
PCNs & PDNs
PDN# : CQ-16-04 QUARTER MARKET DECLINED PDN Product Discontinuation Notice PDF 560 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