NOTICE - The following device(s) are recommended alternatives:
8V97051A - Low Power Wideband Fractional RF Synthesizer
Improved VCO calibration performance over full temperature range.
The 8V97051 is a high performance Wideband RF Synthesizer / PLL optimized for use as the local oscillator (LO) in Multi-Carrier, Multi-mode FDD & TDD Base Station radio card. It is offered in a compact 5x5, 32-VFQFN package.
The 8V97051 Wideband RF Synthesizer / PLL offers a default Fractional Mode with the option to use it with an Integer mode. It requires an external loop filter.
The 8V97051 with integrated Voltage Controlled Oscillator (VCO) supports output frequencies from 34.375MHz to 4400MHz and maintains superior phase noise and spurious performance.
RF_OUT[A:B] output drivers have independently programmable output power ranging from –4dBm to +7dBm. The RF_OUT outputs can be muted. The mute function is accessible via a SPI command or mute pin.

IDT’s RF Synthesizer family also includes the 8V97053 – Wideband RF Synthesizer / PLL with integrated VCO - that offers enhanced phase noise specifications geared to GSM and Band 42 radio cards applications.

For optimal performance, it is recommended to recalibrate the VCO when the temperature has varied more than 90°C from the temperature at which the previous calibration occurred. For applications where such recalibration of the VCO is not practical, refer to the IDT’s RF Synthesizer 8V97051A - Low Power Wideband Fractional RF Synthesizer – that ensures the VCO stays calibrated on a same VCO digital band across the entire temperature range.


  • Dual Differential Outputs
  • Output frequency range: 34.375MHz to 4400MHz (continuous range)
  • RF Output Divide by 1, 2, 4, 8, 16, 32, 64
  • Open Drain Outputs
  • Fractional-N synthesizer (also supports Integer-N mode)
  • 16-bit integer and 12-bit fractional
    (16-bit fractional when using the extended registers)
  • 3- or 4-wire SPI interface (compatible with 3.3V and 1.8V)
  • Single 3.3V supply
  • Logic compatibility: 1.8V
  • Programmable output power level: -4dBm to +5dBm
    (up to +7 when using the extended registers)
  • Mute Function
  • Ultra low PN for 1.1GHz LO: -143dBc/Hz @ 1MHz Offset, (typical)
  • Lock Detect Indicators
  • Input Reference frequency: 5MHz to 310MHz
  • Power Consumption: 380mW (typical) (RF_OUTB disabled)
  • 32-Lead, 5x5 VFQFN package
  • Automatic VCO band selection (Autocal feature)
  • -40°C to +85°C ambient operating temperature
  • Lead-free (RoHS 6) packaging
  • Supported by IDT Timing Commander software tool

Product Options

Part Number Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
Active VFQFPN 32 I Yes Tray
Active VFQFPN 32 I Yes Reel
Active VFQFPN 32 I Yes Reel


Title language Type Format File Size Date
Datasheets & Errata
8V97051 Datasheet Datasheet PDF 1.12 MB
User Guides & Manuals
RF Product Selection Guide Guide PDF 3.64 MB
8V9705x Loop Bandwidth Calculator Guide XLSX 18 KB
Timing Commander Installation Guide Guide PDF 497 KB
Application Notes & White Papers
Integer Boundary Spurs in Fractional-Feedback Phase-Locked Loops (PLLs) White Paper PDF 666 KB
PCN# : A1904-01 Add Greatek, Taiwan as an Alternate Assembly Facility Product Change Notice PDF 983 KB
PCN# : N1701-01 Die revision change Product Change Notice PDF 46 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# : W1512-01 Wafer Size change from 200mm to 300mm at Global Foundries Product Change Notice PDF 188 KB
PCN# : A1511-01 Add SPEL India as Alternate Assembly Location Product Change Notice PDF 544 KB
IDT Products for Wired Broadband Applications Application Briefs PDF 686 KB
RF Timing Family Product Overview Overview PDF 331 KB
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB
8V97051 Low-Power Wideband RF Synthesizer / PLL 日本語 Product Brief PDF 368 KB
Timing Commander Installer (v1.16.4) Software ZIP 19.79 MB
8V9705x Timing Commander Personality File v2.2.0 Software ZIP 3.09 MB


Title language Type Format File Size Date
8V97051 IBIS Model Model - IBIS IBS 1.45 MB

Boards & Kits

Part Number Title Type Company
EVK-8V97051 Evaluation Kit for 8V97051 Evaluation Renesas