© Semiconductor Components Industries, LLC, 2009
August, 2009 − Rev. 4
1 Publication Order Number:
NB6L611/D
NB6L611
2.5V / 3.3V 1:2 Differential
LVPECL Clock / Data Fanout
Buffer
Multi−Level Inputs with Internal Termination
Description
The NB6L611 is a differential 1:2 clock or data fanout buffer. The
differential inputs incorporate internal 50 W termination resistors that
are accessed through the VTD pins and will accept LVPECL, CML,
LVDS, LVCMOS or LVTTL logic levels.
The V
REFAC
reference output can be used to rebias
capacitor−coupled differential or single−ended input signals. When
used, decouple V
REFAC
with a 0.01 mF capacitor and limit current
sourcing or sinking to 0.5 mA. When used, decouple V
REFAC
with a
0.01 mF capacitor and limit current sourcing or sinking to 0.5 mA.
When not used, V
REFAC
output should be left open.
The device is housed in a small 3x3 mm 16 pin QFN package.
The NB6L611 is a member of the ECLinPS MAX™ family of high
performance clock and data management products.
Features
• Input Clock Frequency > 4.0 GHz
• 280 ps Typical Propagation Delay
• 100 ps Typical Rise and Fall Times
• 0.5 ps maximum RMS Clock Jitter
• Differential LVPECL Outputs, 780 mV Amplitude, typical
• LVPECL Operating Range: V
CC
= 2.375 V to 3.63 V with V
EE
= 0 V
• NECL Operating Range: V
CC
= 0 V with V
EE
= −2.375 V to −3.63 V
• Internal Input Termination Resistors, 50 W
• V
REFAC
Reference Output Voltage
• Functionally Compatible with Existing 2.5 V / 3.3 V LVEL, LVEP,
EP, and SG Devices
• −40°C to +85°C Ambient Operating Temperature
• These are Pb−Free Devices
MARKING
DIAGRAM*
http://onsemi.com
QFN−16
MN SUFFIX
CASE 485G
NB6L
611
ALYWG
G
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
16
1
*For additional marking information, refer to
Application Note AND8002/D.
See detailed ordering and shipping information in the package
dimensions section on page 9 of this data sheet.
ORDERING INFORMATION
Figure 1. Simplified Logic Diagram
Q0
Q0
Q1
Q1
D
D
VTD
VTD
VREFAC
1