NBC12439, NBC12439A
3.3V/5V Programmable PLL
Synthesized Clock
Generator
50 MHz to 800 MHz
http://onsemi.com
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
of 1, 2, 4 or 8. The VCO and output frequency can be programmed
using the parallel or serial interfaces to the configuration logic. Output
frequency steps of 16 MHz, 8 MHz, 4 MHz, or 2 MHz can be
achieved using a 16 MHz crystal, depending on the output divider
settings. The PLL loop filter is fully integrated and does not require
any external components.
MARKING
DIAGRAMS
1 28
NBC12439xG
AWLYYWW
PLCC−28
FN SUFFIX
CASE 776
Features
•
•
•
•
•
•
•
•
•
•
Best−in−Class Output Jitter Performance, ±20 ps Peak−to−Peak
50 MHz to 800 MHz Programmable Differential PECL Outputs
Fully Integrated Phase−Lock−Loop with Internal Loop Filter
Parallel Interface for Programming Counter and Output Dividers
During Powerup
Minimal Frequency Overshoot
NBC12
439x
AWLYYWWG
LQFP−32
FA SUFFIX
CASE 873A
1
Serial 3−Wire Programming Interface
1
Crystal Oscillator Inputs 10 MHz to 20 MHz
32
QFN32
MN SUFFIX
CASE 488AM
Operating Range: VCC = 3.135 V to 5.25 V
CMOS and TTL Compatible Control Inputs
Pin and Function Compatible with Motorola MC12439 and
MPC9239
Powerdown of PECL Outputs (B16)
•
• 0°C to 70°C Ambient Operating Temperature (NBC12439)
• −40°C to 85°C Ambient Operating Temperature (NBC12439A)
• Pb−Free Packages are Available
x
A
WL, L
YY, Y
WW, W
G or G
NBC12
439x
AWLYYWWG
G
= Blank or A
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 17 of this data sheet.
© Semiconductor Components Industries, LLC, 2009
January, 2009 − Rev. 14
1
Publication Order Number:
NBC12439/D
