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NB3L204K Datasheet

Differential 1:4 HCSL Fanout Buffer

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NB3L204K
2.5V, 3.3V Differential 1:4
HCSL Fanout Buffer
Description
The NB3L204K is a differential 1:4 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 Vth reference supply per Figures 4
and 6. The input signal will be translated to HCSL and provides four
identical copies operating up to 350 MHz.
The NB3L204K is optimized for ultra−low phase noise, propagation
delay variation and low output–to–output skew, and is DB400H
compliant. As such, system designers can take advantage of the
NB3L204K’s performance to distribute low skew clocks across the
backplane or the motherboard making it ideal for Clock and Data
distribution applications such as PCI Express, FBDIMM, Networking,
Mobile Computing, Gigabit Ethernet, etc.
Output drive current is set by connecting a 475 W resistor from
IREF (Pin 14) to GND per Figure 11. Outputs can also interface to
LVDS receivers when terminated per Figure 12.
Features
Maximum Input Clock Frequency > 350 MHz
2.5 V ±5% / 3.3 V ±10% Supply Voltage Operation
4 HCSL Outputs
DB400H Compliant
Individual OE Control Pin for Each Output
100 ps Max Output−to−Output Skew Performance
1 ns Typical Propagation Delay
500 ps Typical Rise and Fall Times
80 fs Maximum Additive RMS Phase Jitter
−40°C to +85°C Ambient Operating Temperature
QFN 24−pin Package, 4 mm x 4 mm
These Devices are Pb−Free and are RoHS Compliant
Typical Applications
PCI Express
FBDIMM
Mobile Computing
Networking
Gigabit Ethernet
www.onsemi.com
MARKING
DIAGRAM
QFN24
4x4
CASE 485DJ
1
NB3L
204K
ALYWG
G
NB3L204K = Specific Device Code
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information page 13 of this
data sheet.
© Semiconductor Components Industries, LLC, 2016
April, 2016 − Rev. 0
1
Publication Order Number:
NB3L204K/D


  ON Semiconductor Electronic Components Datasheet  

NB3L204K Datasheet

Differential 1:4 HCSL Fanout Buffer

No Preview Available !

OE0#
OE1#
CLK_IN
CLK_IN#
OE2#
OE3#
NB3L204K
VDD
VDD_O
DIF_0
DIF_0#
DIF_1
DIF_1 #
Figure 1. Simplified Block Diagram
DIF_2
DIF_2#
DIF_3
DIF_3 #
IREF
RREF
Figure 2. 24−Pin QFN Pinout
(Top View)
www.onsemi.com
2


Part Number NB3L204K
Description Differential 1:4 HCSL Fanout Buffer
Maker ON Semiconductor
Total Page 14 Pages
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