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NB3L208K Datasheet

2.5V / 3.3V Differential 1:8 HCSL Fanout Buffer

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NB3L208K pdf
NB3L208K
2.5V, 3.3V Differential 1:8
HCSL Fanout Buffer
Description
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 Vth reference supply per Figures 4
and 6. The input signal will be translated to HCSL and provides eight
identical copies operating up to 350 MHz.
The NB3L208K is optimized for ultra−low phase noise, propagation
delay variation and low output–to–output skew, and is DB800H
compliant. As such, system designers can take advantage of the
NB3L208K’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 27) 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
8 HCSL Outputs
DB800H Compliant
Individual OE Control Pin for Each Bank of 2 Outputs
100 ps Max Output−to−Output Skew Performance
1 ns Typical Propagation Delay
500 ps Typical Rise and Fall Times
80 fs Maximum Additive Phase Jitter RMS
−40°C to +85°C Ambient Operating Temperature
QFN 32−pin Package, 5 mm x 5 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
1 32
QFN32
G SUFFIX
CASE 488AM
1
NB3L
208K
AWLYYWWG
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
G = Pb−Free Package
ORDERING INFORMATION
See detailed ordering and shipping information page 12 of this
data sheet.
© Semiconductor Components Industries, LLC, 2014
December, 2014 − Rev. 1
1
Publication Order Number:
NB3L208K/D


  ON Semiconductor Electronic Components Datasheet  

NB3L208K Datasheet

2.5V / 3.3V Differential 1:8 HCSL Fanout Buffer

No Preview Available !

NB3L208K pdf
OE#_[1:0]
OE#_[3:2]
CLK_IN
CLK_IN#
OE#_[5:4]
OE#_[7:6]
NB3L208K
VDD
VDD_O
Figure 1. Simplified Block Diagram
DIF_0
DIF_0#
DIF_1
DIF_1#
DIF_2
DIF_2 #
DIF_3
DIF_3 #
IREF
RREF
DIF_4
DIF_4#
DIF_5
DIF_5#
DIF_6
DIF_6 #
DIF_7
DIF_7#
DIF_0 1
DIF_0# 2
DIF_1 3
DIF_1# 4
DIF_2 5
DIF_2# 6
DIF_3 7
DIF_3# 8
NB3L208K
Exposed Pad (EP)
24 DIF_4
23 DIF_4#
22 DIF_5
21 DIF_5#
20 DIF_6
19 DIF_6#
18 DIF_7
17 DIF_7#
Figure 2. 32−Pin QFN Pinout
(Top View)
www.onsemi.com
2


Part Number NB3L208K
Description 2.5V / 3.3V Differential 1:8 HCSL Fanout Buffer
Maker ON Semiconductor
Total Page 13 Pages
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