© Semiconductor Components Industries, LLC, 2012
March, 2012 − Rev. 5
1 Publication Order Number:
NB6L295M/D
NB6L295M
2.5V / 3.3V Dual Channel
Programmable Clock/Data
Delay with Differential CML
Outputs
Multi−Level Inputs w/ Internal Termination
The NB6L295M is a Dual Channel Programmable Delay Chip
designed primarily for Clock or Data de−skewing and timing
adjustment. The NB6L295M is versatile in that two individual
variable delay channels, PD0 and PD1, can be configured in one of
two operating modes, a Dual Delay or an Extended Delay.
In the Dual Delay Mode, each channel has a programmable delay
section which is designed using a matrix of gates and a chain of
multiplexers. There is a fixed minimum delay of 3.2 ns per channel.
The Extended Delay Mode amounts to the additive delay of PD0
plus PD1 and is accomplished with the Serial Data Interface MSEL bit
set High. This will internally cascade the output of PD0 into the input
of PD1. Therefore, the Extended Delay path starts at the IN0/IN0
inputs, flows through PD0, cascades to the PD1 and outputs through
Q1/Q1
. There is a fixed minimum delay of 6.0 ns for the Extended
Delay Mode.
The required delay is accomplished by programming each delay
channel via a 3−pin Serial Data Interface, described in the application
section. The digitally selectable delay has an increment resolution of
typically 11 ps with a net programmable delay range of either 0 ns to
6 ns per channel in Dual Delay Mode; or from 0 ns to 11.2 ns for the
Extended Delay Mode.
The Multi−Level Inputs can be driven directly by differential
LVPECL, LVDS or CML logic levels; or by single ended LVPECL,
LVCMOS or LVTTL. A single enable pin is available to control both
inputs. The SDI input pins are controlled by LVCMOS or LVTTL
level signals. The NB6L295M 16 mA CML output contains
temperature compensation circuitry. This device is offered in a 4 mm x
4 mm 24−pin QFN Pb−free package. The NB6L295M is a member of
the ECLinPS MAX™ family of high performance products.
Features
• Input Clock Frequency > 1.5 GHz with 210 mV
V
OUTPP
• Input Data Rate > 2.5 Gb/s
• Programmable Delay Range: 0 ns to 6 ns per Delay
Channel
• Programmable Delay Range: 0 ns to 11.2 ns for
Extended Delay Mode
• Total Delay Range: 3.2 ns to 8.5 ns per Delay Channel
• Total Delay Range: 6.2 ns to 16.6 ns in Extended Delay
Mode
• Monotonic Delay: 11 ps Increments in 511 Steps
• Linearity $20 ps, Maximum
• 100 ps Typical Rise and Fall Times
• 2.4 ps Typical Clock Jitter, RMS
• 20 ps Pk−Pk Typical Data Dependent Jitter
• LVPECL, CML or LVDS Differential Input Compatible
• LVPECL, LVCMOS, LVTTL Single Ended Input
Compatible
• 3−Wire Serial Interface
• Input Enable/Disable
• Operating Range: V
CC
= 2.375 V to 3.6 V
• CML Output Level; 380 mV Peak−to−Peak, Typical
• Internal 50 W Input/Output Termination Provided
• −40°C to 85°C Ambient Operating Temperature
• 24−Pin QFN, 4 mm x 4 mm
• These are Pb−Free Devices*
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
MARKING
DIAGRAM*
http://onsemi.com
QFN−24
MN SUFFIX
CASE 485L
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
*For additional marking information, refer to
Application Note AND8002/D.
See detailed ordering and shipping information in the package
dimensions section on page 12 of this data sheet.
ORDERING INFORMATION
NB6L
295M
ALYWG
G
1
24
24 1
