NBC12439 ON, NBC12439 Datasheet
NBC12439
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NBC12439 Summary of contents
Page 1
... PLL Synthesized Clock Generator 50 MHz to 800 MHz The NBC12439 is a general purpose, PLL based synthesized clock source. 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 The VCO and output frequency can be programmed using the parallel or serial interfaces to the configuration logic ...
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... OE 28 S_LOAD 7 P_LOAD 27 S_DATA 26 S_CLOCK Table 1. Output Division N [1:0] Output Division Figure 1. NBC12439 Block Diagram (28-Lead PLCC) NBC12439 PWR_DOWN 2 POWER PHASE DOWN DETECTOR VCO ( 400-800 MHz LATCH LATCH BIT SR 7- BIT SR ...
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... NBC12439 S_CLOCK 26 S_DATA 27 S_LOAD 28 PLL_V 1 CC PWR_DOWN 2 FREF_EXT 3 XTAL1 Figure 2. 28-Lead PLCC (Top View S_CLOCK 1 S_DATA 2 S_LOAD 3 PLL_V 4 CC PLL_V PWR_DOWN FREF_EXT 7 XTAL1 Figure 3. 32-Lead LQFP (Top View) http://onsemi.com 3 21 ...
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... The following gives a brief description of the functionality of the NBC12439 Inputs and Outputs. Unless explicitly stated, all inputs are CMOS/TTL compatible with either pull-up or pulldown resistors. The PECL outputs are capable of driving two series terminated 50 W transmission lines on the incident edge. PIN FUNCTION DESCRIPTION ...
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... Thermal Resistance (Junction to Ambient Thermal Resistance (Junction to Case Wave Solder sol 2. Maximum Ratings are those values beyond which device damage may occur. NBC12439 Characteristics Human Body Model Machine Model Charged Device Model Oxygen Index Condition 1 Condition 2 GND = ...
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... Output HIGH Voltage OH PECL FOUT FOUT V Output LOW Voltage OL PECL FOUT FOUT I Power Supply Current PLL_V CC 5. FOUT/FOUT output levels will vary 1:1 with V 6. FOUT/FOUT outputs are terminated through resistor to V NBC12439 5 Min Typ Max Min Condition V = 3 0.8 CC ...
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... FOUT/FOUT outputs are terminated through resistor Maximum frequency on FREF_EXT is a function of setting the appropriate M counter value, 25 MHz MHz, for the VCO to operate within the valid range of 400 MHz v f VCO 10. See applications information section. NBC12439 5 (Note 8) A Condition ...
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... NBC12439 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. The configuration logic has two sections: serial and parallel. The parallel interface uses the values at the M[6:0] and N[1:0] inputs to configure the internal counters ...
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... S_LOAD pin after the shift register is fully loaded will transfer the divide values into the counters. Figures 4 and 5 illustrate the timing diagram for both a parallel and a serial load of the NBC12439 synthesizer. M[6:0] and N[1:0] are normally specified after power-up through the parallel interface, and then possibly, fine tuned again through the serial interface ...
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... Table 5. NBC12439 Frequency Operating Range VCO Frequency (MHz) Range for a Crystal Frequency (MHz) of: M M[6: 0010100 21 0010101 22 0010110 23 0010111 24 0011000 25 0011001 26 0011010 27 0011011 28 0011100 29 0011101 30 0011110 31 0011111 32 0100000 33 0100001 34 0100010 35 0100011 36 0100100 37 0100101 38 0100110 39 0100111 40 0101000 400 41 0101001 410 42 0101010 420 ...
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... However, the PLL bypass mode may be of interest at the board level for functional debug. When T[2:0] is set to 110, the NBC12439 is placed in PLL bypass mode. In this mode the S_CLOCK input is fed directly into the M and N dividers. The N divider drives the FOUT differential pair and the M counter drives the TEST output pin ...
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... As the oscillator is somewhat sensitive to loading on its inputs, the user is advised to mount the crystal as close to the NBC12439 as possible to avoid any board level parasitics. To facilitate co-location, surface mount crystals are recommended, but not required ...
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... C3 Xtal Figure 8. PCB Board Layout for NBC12439 (28 PLCC) Note the dotted lines circling the crystal oscillator connection to the device. The oscillator is a series resonant circuit and the voltage amplitude across the crystal is relatively small imperative that no actively switching ...
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... These test processes can be correlated to earlier test methods and are more accurate. All of the jitter data reported on the NBC12439 was collected in this manner. Figure 11 shows the RMS jitter performance as a function of the VCO frequency range. The general trend is that as the VCO frequency is increased, the RMS output jitter will decrease ...
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... 400 500 600 VCO FREQUENCY (MHz) Figure 11. Cycle-to-Cycle RMS Jitter vs. VCO Frequency NBC12439 700 800 100 200 Figure 12. Cycle-to-Cycle RMS Jitter vs. http://onsemi.com 15 300 400 500 600 700 800 ...
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... S_DATA S_CLOCK t SET- UP Figure 13. Set-Up and Hold S_DATA t S_LOAD SET- UP Figure 14. Set-Up and Hold M[8:0] N[1:0] P_ LOAD t SET- UP Figure 15. Set-Up and Hold F OUT F OUT Pulse Width Figure 16. Output Duty Cycle NBC12439 t HOLD t HOLD t HOLD t PERIOD http://onsemi.com 16 tpw DCO + tPERIOD ...
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... NBC12439 F OUT Driver Device F OUT 2.0 V Figure 17. Typical Termination for Output Driver and Device Evaluation (See Application Note AND8020 - Termination of ECL Logic Devices.) http://onsemi.com D Receiver Device ...
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... 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 PACKAGE DIMENSIONS PLCC-28 FN SUFFIX PLASTIC PLCC PACKAGE CASE 776-02 ISSUE E ...
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... 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 PACKAGE DIMENSIONS LQFP-32 FA SUFFIX PLASTIC LQFP PACKAGE CASE 873A-02 ISSUE A 4X ...
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... Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: ONlit@hibbertco.com N. American Technical Support: 800-282-9855 Toll Free USA/Canada NBC12439 JAPAN: ON Semiconductor, Japan Customer Focus Center 2-9-1 Kamimeguro, Meguro-ku, Tokyo, Japan 153-0051 Phone: 81-3-5773-3850 ON Semiconductor Website: http://onsemi.com For additional information, please contact your local Sales Representative. http://onsemi.com 20 NBC12439/D ...