nbc12439a ON Semiconductor, nbc12439a Datasheet
nbc12439a
Available stocks
Related parts for nbc12439a
nbc12439a Summary of contents
Page 1
... Generator 50 MHz to 800 MHz Description The NBC12439 and NBC12439A are general purpose, PLL based synthesized clock sources. The VCO will operate over a frequency range of 400 MHz to 800 MHz. The VCO frequency is sent to the N-output divider, where it can be configured to provide division ratios ...
Page 2
... COUNTER 10-20MHz OSC 5 XTAL2 S_LOAD 7 P_LOAD 27 S_DATA 26 S_CLOCK Table 1. Output Division N [1:0] Output Division NBC12439, NBC12439A PWR_DOWN 2 PHASE POWER DETECTOR DOWN VCO ( 400-800 MHz LATCH LATCH BIT SR 7- BIT 17, 18 ...
Page 3
... Figure 2. 28-Lead PLCC (Top View S_CLOCK 1 S_DATA 2 S_LOAD 3 PLL_V 4 CC PLL_V 5 CC PWR_DOWN 6 FREF_EXT 7 XTAL1 Figure 4. 32-Lead QFN (Top View) NBC12439, NBC12439A N[ XTAL_SEL 15 14 M[6] M[ S_CLOCK 1 S_DATA 2 S_LOAD 3 PLL_V 4 CC PLL_V 5 ...
Page 4
... Exposed Pad for QFN-32 only * When left Open, these inputs will default LOW. ** When left Open, these inputs will default HIGH. NBC12439, NBC12439A Description These pins form an oscillator when connected to an external series-resonant crystal. This pin loads the configuration latches with the contents of the shift registers. The latches will be transparent when this signal is HIGH ...
Page 5
... Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. NBC12439, NBC12439A Characteristics Human Body Model ...
Page 6
... Max V = 3 -0 3.3 V 2.155 2.405 CC (Notes 3.3 V 1.355 1.675 CC (Notes -40°C to 85°C (NBC12439A)) A Min Typ Max Min Typ Max 2.0 2.0 0.8 1.0 2.5 2.5 0.4 3.855 4.105 3.855 4.105 3.055 3.305 3.055 3.305 ...
Page 7
... Table 8. AC CHARACTERISTICS (V (NBC12439A)) (Note 7) Symbol Characteristic F Input Frequency IN F Output Frequency OUT t Maximum PLL Lock Time LOCK t Period Jitter (RMS) jitter(pd) t Cycle-to-Cycle Jitter (Peak-to-Peak) jitter(cyc- cyc) t Setup Time s t Hold Time h tpw Minimum Pulse Width MIN DCO Output Duty Cycle ...
Page 8
... NBC12439, NBC12439A FUNCTIONAL DESCRIPTION for the output driver and the internal logic is separated from the power supply for the phase-locked loop to minimize noise induced jitter. ...
Page 9
... Programming the NBC12439 and NBC12439A is accomplished by properly configuring the internal dividers to produce the desired frequency at the outputs. The output frequency can by represented by this formula FREF_EXT OUT XTAL This can be simplified to FREF_EXT) OUT XTAL where F is the crystal frequency the loop divider XTAL modulus, and N is the output divider modulus ...
Page 10
... NBC12439, NBC12439A Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á 414 432 ...
Page 11
... SHIFT REG T0 14- BIT T1 T2 • T2=T1=1, T0=0: Test Mode • SCLOCK is selected, MCNT is on TEST output, SCLOCK FOUT pin. PLOAD acts as reset for test pin latch. When latch reset, T2 data is shifted out TEST pin. NBC12439, NBC12439A M[6:0] ...
Page 12
... PLL_V NBC12349A. Figure 8 illustrates a typical power supply filter scheme. The NBC12439 and NBC12439A are most susceptible to noise with spectral content in the 1 KHz to 1 MHz range. Therefore, the filter should be designed to target this range. The key parameter that needs to be met in the final filter ...
Page 13
... PCB layout techniques will produce effective capacitor resonances at frequencies adequate to supply the instantaneous switching current for the NBC12439 and NBC12439A outputs imperative that low inductance chip capacitors are used equally important that the board layout not introduce any of the inductance saved by using the leadless capacitors ...
Page 14
... The number of cycles used to look for the maximum jitter varies by application but the JEDEC spec is 10,000 observed cycles. The NBC12439 and NBC12439A exhibit long term and cycle-to-cycle jitter, which rivals that of SAW based oscillators. This jitter performance comes with the added flexibility associated with a synthesizer over a fixed frequency oscillator ...
Page 15
... NBC12439, NBC12439A S_DATA S_CLOCK t SET- UP Figure 14. Setup and Hold S_DATA t S_LOAD SET- UP Figure 15. Setup and Hold M[6:0] N[1:0] P_ LOAD t SET- UP Figure 16. Setup and Hold F OUT F OUT Pulse Width Figure 17. Output Duty Cycle t HOLD t HOLD t HOLD t PERIOD http://onsemi.com 15 tpw DCO + tPERIOD ...
Page 16
... NBC12439AFA NBC12439AFAG NBC12439AFAR2 NBC12439AFAR2G NBC12439AFN NBC12439AFNG NBC12439AFNR2 NBC12439AFNR2G NBC12439AMNG NBC12439AMNR4G †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. NBC12439, NBC12439A = OUT OUT ...
Page 17
... NBC12439, NBC12439A Resource Reference of Application Notes AN1405/D - ECL Clock Distribution Techniques AN1406/D - Designing with PECL (ECL at +5.0 V) AN1503/D - ECLinPSt I/O SPiCE Modeling Kit AN1504/D - Metastability and the ECLinPS Family AN1568/D - Interfacing Between LVDS and ECL AN1672/D - The ECL Translator Guide AND8001/D - Odd Number Counters Design ...
Page 18
... DIMENSION H DOES NOT INCLUDE DAMBAR PROTRUSION OR INTRUSION. THE DAMBAR PROTRUSION(S) SHALL NOT CAUSE THE H DIMENSION TO BE GREATER THAN 0.037 (0.940). THE DAMBAR INTRUSION(S) SHALL NOT CAUSE THE H DIMENSION TO BE SMALLER THAN 0.025 (0.635). NBC12439, NBC12439A PACKAGE DIMENSIONS PLCC-28 FN SUFFIX PLASTIC PLCC PACKAGE CASE 776-02 ISSUE E ...
Page 19
... DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. DAMBAR PROTRUSION SHALL NOT CAUSE THE D DIMENSION TO EXCEED 0.520 (0.020). 8. MINIMUM SOLDER PLATE THICKNESS SHALL BE 0.0076 (0.0003). 9. EXACT SHAPE OF EACH CORNER MAY VARY FROM DEPICTION. NBC12439, NBC12439A PACKAGE DIMENSIONS 32 LEAD LQFP CASE 873A-02 ISSUE C 4X 0.20 (0.008) AB ...
Page 20
... Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: orderlit@onsemi.com NBC12439, NBC12439A PACKAGE DIMENSIONS QFN32 5*5*1 0.5 P CASE 488AM-01 ISSUE ...