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Semiconductor Components Industries, LLC, 2012
March, 2012 − Rev. 4
1 Publication Order Number:
EVBUM2090/D
NBC124XXEVB
NBC12429/12430/12439
Evaluation Board User's
Manual
Device Description
The NBC124XX-series are high-speed, programmable
PLL-based clock synthesizers. A crystal (or an external
frequency source for the 12430 or 12439) provides a
reference frequency to the internal PLL. This reference
frequency is multiplied by a VCO to a desired frequency by
a ratio of integers. The VCO frequency is sent to the
N-output divider, where it can be configured to various
division ratios and then drive a pair of differential
(LV)PECL outputs.
Board Description
The NBC12429/430/439 Evaluation Board provides a
flexible and convenient platform to quickly evaluate,
characterize and verify the performance and operation of all
three NBC124XX Clock Generators. This user’s manual
provides detailed information on board contents, layout and
its use. It should be used in conjunction with a device data
sheet: NBC12429, NBC12430 or NBC12439.
The NBC12429/430/439 Evaluation Board is equipped
with a PLCC−28 surface mount socket. Device samples can
be ordered separately (www.onsemi.com
).
Board Features
Accommodates all Three NBC12429/430/439 Clock
Generators
Supports Use of 10 MHz to 20 MHz Through-Hole or
Surface Mount Crystal
Incorporates DIP Switch Controlled M and N Logic
Pins are Programmed on Board, Minimizing Excess
Cabling
P_Load is Push-button or Externally Controlled
Serial Input Interfaces are Accessed Externally via
SMA Connectors
Convenient and Compact Board Layout
3.3 V or 5 V Split-power Supply Operation
LVPECL/PECL Differential Output Signals are
Monitored via SMA Connectors
Figure 1. Evaluation Board (Top View) Figure 2. Evaluation Board (Bottom View)
http://onsemi.com
EVAL BOARD USER’S MANUAL
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