© Semiconductor Components Industries, LLC, 2016
April, 2016 − Rev. 1 1Publication Order Number:
EVBUM2295/D
NB3L208KMNGEVB
NB3L208K
Evaluation Board
User's Manual
Introduction
The NB3L208K is a differential 1:8 Clock fanout buffer
with High-speed Current Steering Logic (HCSL) outputs.
Inputs can directly accept differential LVPECL, LVDS and
HCSL signals. Single-ended LVPECL, HCSL, LVCMOS,
or LVTTL levels are accepted with a proper external V TH
reference supply. These signals will be translated to HCSL
and eight identical copies of Clock will be distributed,
operating up to 350 MHz.
This manual should be used in conjunction with the device
datasheet, which contains full technical details on the device
specifications and operation.
This evaluation board manual contains:
•Information on the NB3L208K Evaluation Board
•Block Diagram and Board Schematic
•Assembly Instructions
•Test and Measurement Setup Procedures
•Bill of Materials
Figure 1. NB3L208KMNGEVB Top and Bottom View
Top View Bottom View
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EVAL BOARD USER’S MANUAL
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QUICK START LAB SET-UP USER’S GUIDE
Equipment Required
1. DC Power Supply
2. Oscilloscope
3. Phase Noise Analyzer
4. Connectors for DC Power Supply
5. 50-W SMA Connectors for I/Os
Block Diagram
Figure 2. Time and Frequency Domain Block Diagram
Power Supply
Generator Tek DPO70404Agilent E5052B
SSA Signal
Source Analyzer
NB3L208K
CH1 CH2 CH3 CH4
VDD GND
CLK_IN CLK_IN DIF_0−7
DIF_0−7#
Balun
Note: Balun Connected to Outputs Only during Phase Noise Testing.
VDD GND
DIF_0−7
DIF_0−7#
Power Supplies
Each VDD, VDD_0 (VX on board), GND_0 (DUTGND
on board) and SMAGND power supply has a separate
side-launch banana jack located on bottom side of the test
board (as shown in Figure 1).
HCSL Outputs
HCSL outputs are typically loaded and terminated with
a series re s i s t o r ( R SERIES) = 33-W and 50-W to ground. This
can be easily accomplished by connecting the HCSL outputs
to the 50-W internal impedance in the oscilloscope. There
are on-board RSERIES = 33-W termination resistors installed
for each HCSL output.
Figure 3. Set-Up for HCSL Output
50 W to Ground via
SMA Connector to
Oscilloscope
RSERIES = 33 W
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Figure 4. NB3L208KEVB Schematic
EP TIED TO
DUT GND
SMAGNDSMAGNDSMAGND
SMAGNDSMAGNDSMAGND
SMAGND
SMAGND
SMAGND
SMAGND
SMAGND
SMAGND
SMAGND
SMAGND
SMAGND
SMAGND
SMAGND
SMAGND
SMAGND
SMAGND
SMAGND
SMAGND
33 W
33 W
33 W
33 W
33 W
33 W
33 W
33 W
33 W
33 W
33 W
33 W
33 W
33 W
33 W
33 W
SMAGND
SMAGND
R3 475 W
R2 50 W
R1 50 W
C1 0.1 mF
SMAGND
SMAGND
C2 0.1 mF
C3 0.1 mF
C5 0.1 mF
C4 0.1 mF
C6
10 mF
VDD_0
OE#_[7:6]
CLK_IN
CLK_IN#
GND
VDD
GND_0
VDD_0
VDD_0
GND_0
OE#_[5:4]
OE#_[3:2]
OE#_[1:0]
IREF
GND_0
VDD_0
DIF_7#
DIF_7
DIF_6#
DIF_6
DIF_5#
DIF_5
DIF_4#
DIF_4
DIF_3#
DIF_3
DIF_2#
DIF_2
DIF_1#
DIF_1
DIF_0#
DIF_0 1
2
3
4
5
6
7
8
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
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Test and Measurement Setup Procedures
1. Connect VDD and VDD_0 (VX on board) of
the NB3L208K to DC source with power supply
cables (do not turn power on, yet).
2. Connect SMAGND and DUTGND to
the appropriate DC source. For differential HCSL
inputs, both SMAGND and DUTGND are
connected together.
3. Connect the outputs of the generator to
the CLK_IN & CLK_IN# inputs with 50-W
connectors. For phase noise test, low noise
generator is required to ensure the best additive
RMS Phase jitter of the DUT.
4. Connect the DIF_n/DIF_n# outputs to the
appropriate oscilloscope channel. The board does
not have 50-W output termination, thus use of the
probes with 50-W termination is required.
Power-Up Sequence
1. Turn on DUT power supply.
2. Setup the generator VIH, VIL levels to set up
the inputs to desired inputs levels, i.e differential
LVPECL, LVDS, and HCSL signals or
Single-ended LVPECL, HCSL, LVCMOS,
or LVTTL. For differential HCSL inputs,
VIL = 0 V and VIH = 700 mV.
3. Monitor DIF_n/DIF_n# outputs on oscilloscope.
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BILL OF MATERIALS
Table 1. NB3L208KMNGEVB BILL OF MATERIALS
Component Qty. Description Manufacturer Part Number Web Site
SMA Connector 22 Edge Mount Johnson 142−0711−821
Banana Jack Connector 2Red − Side Launch Deltron 571−0500 Mouser #164−6219
Banana Jack Connector 1Black − Side Launch Deltron 571−0100 Mouser #164−6218
Banana Jack Connector 1Green − Side Launch Deltron Mouser
Chip Resistor 90-Q 0603 Vishay CRCW06030000Z0EA Digi-Key
541−0.0GTR−ND
Chip Resistor 16 33-Q 0402 Panasonic ERJ−2RKF33R0X Digi-Key
ERJ−2RKF33R0X
Chip Resistor 450-Q, 0603 Vishay FC0603E50R0BTBST1 Digi-Key
FC0603−50BFTR−ND
Chip Resistor 1475-Q 0603 Vishay TNPW0603475RBEEA Digi-Key
541−2027−2−ND
Capacitor 2 10 mF ±10%, Case “C” 25 V or 16 V KEMET T491C106K025AT
T491C106K016AS
Chip Capacitor 50.1 mF ±10%, 0603 AVX 0603C104KAT2A www.avx.com
Digi-Key
478−1129−1−ND
Stand-Off 4Standoff, 4−40 1/4 × 5/8 Keystone 1808 Digi-Key
1808K−ND
Screw 4 Screw, 4−40 × 0.25, PHP Building Fasteners PMS 440 0025 PH Digi-Key
H342−ND
Evaluation Board 1 NB3L208KEVB
QFN−32 Evaluation Board ON Semiconductor NB3L208KEVB
Device Under Test 1 DUT ON Semiconductor NB3L208K www.onsemi.com
NOTE: Components are available through most distributors, i.e. www.newark.com, www.Digikey.com.
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