3.3 V Serial Input MultiProtocol PLL Clock Synthesizer, Differential LVPECL Output NB4N441 www.onsemi.com Description The NB4N441 is a precision clock synthesizer which generates a differential LVPECL clock output frequency from 12.5 MHz to 425 MHz. A Serial Peripheral Interface (SPI) is used to configure the device to produce one of sixteen popular standard protocol output QFN24 MN SUFFIX frequencies from a single 27 MHz crystal reference. The NB4N441 CASE 485L also has the added feature of allowing application specific output frequencies from 12.5 MHz to 425 MHz using crystals within the range of 10 MHz to 28 MHz. MARKING DIAGRAM* Features 24 Performs Precision Clock Generation and Synthesis from a Single 1 27 MHz Crystal Reference NB4N Serial Load Capability for Proprietary Frequencies 441 ALYW Flexible Input Allows for External Clock Reference Exceeds Bellcore and ITU Jitter Generation Specification PLL Lock Detect Output A = Assembly Location L = Wafer Lot Output Enable Y = Year Fully Integrated PhaseLockLoop with Internal Loop Filter W = Work Week Operating Range: V = 3.135 V to 3.465 V = PbFree Package CC (Note: Microdot may be in either location) Small Footprint 24 Pin QFN *For additional marking information, refer to These Devices are PbFree and are RoHS Compliant Application Note AND8002/D. ORDERING INFORMATION Device Package Shipping QFN24 NB4N441MNG 92 Units / Tube (PbFree) For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. Semiconductor Components Industries, LLC, 2011 1 Publication Order Number: May, 2021 Rev. 3 NB4N441/DNB4N441 LOCKED XTAL R OUTDIV 27 MHz OSC CLKOUT 2, 4, 8, FB 16, 32 CLKOUT Feedback OE Divider V 2 V CC SDATA Frequency Control Logic SCLOCK Serial Load SLOAD Figure 1. Simplified Block Diagram V LOCKED VCC PLL CC Input Loop Prescaler PFD Filter VCO CLK/XTAL1 XTAL P R OUTDIV (N ) OE OSC XTAL2 2, 4, 8, CLKOUT FB 16, 32 CLKOUT Feedback Divider (M ) SDATA P 4:0 M 9:0 N 3:0 SCLOCK Frequency Control Logic SLOAD Serial Load GND Figure 2. Block Diagram www.onsemi.com 2