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NB2305A Datasheet

Zero Delay Clock Buffer

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NB2305A
3.3 V Zero Delay
Clock Buffer
The NB2305A is a versatile, 3.3 V zero delay buffer designed to
distribute highspeed clocks. It accepts one reference input and drives
out five lowskew clocks. It is available in a 8 pin package.
The 1H version of the NB2305A operates at up to 133 MHz, and
has higher drive than the 1 devices. All parts have onchip PLL’s that
lock to an input clock on the REF pin. The PLL feedback is onchip
and is obtained from the CLKOUT pad.
Multiple NB2305A devices can accept the same input clock and
distribute it. In this case the skew between the outputs of the two
devices is guaranteed to be less than 700 ps.
All outputs have less than 200 ps of cycletocycle jitter. The input
and output propagation delay is guaranteed to be less than 350 ps, and
the output to output skew is guaranteed to be less than 250 ps.
The NB2305A is available in two different configurations, as shown
in the ordering information table. The NB2305A1 is the base part. The
NB2305Ax1H* is the high drive version of the 1 and its rise and fall
times are much faster than 1 part.
Features
15 MHz to 133 MHz Operating Range, Compatible with CPU and
PCI Bus Frequencies
Zero Input Output Propagation Delay
Multiple LowSkew Outputs
OutputOutput Skew Less than 250 ps
DeviceDevice Skew Less than 700 ps
One Input Drives 5 Outputs
Less than 200 ps CycletoCycle Jitter is Compatible with PentiumR
Based Systems
Available in 8 Pin, 150 mil SOIC Package and 8 Pin TSSOP 4.4 mm
3.3 V Operation, Advanced 0.35 m CMOS Technology
These are PbFree Devices
http://onsemi.com
MARKING
DIAGRAMS*
8
1
SOIC8
D SUFFIX
CASE 751
8
XXXX
ALYW
G
1
8
1
TSSOP8
DT SUFFIX
CASE 948J
8
XXX
ALYWG
G
1
XXXX = Device Code
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = PbFree Package
(Note: Microdot may be in either location)
*For additional marking information, refer to
Application Note AND8002/D.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 6 of this data sheet.
*x = C for Commercial; I for Industrial.
© Semiconductor Components Industries, LLC, 2006
November, 2006 Rev. 5
1
Publication Order Number:
NB2305A/D


  ON Semiconductor Electronic Components Datasheet  

NB2305A Datasheet

Zero Delay Clock Buffer

No Preview Available !

NB2305A pdf
NB2305A
REF
PLL
CLKOUT
CLK1
CLK2
CLK3
CLK4
REF 1
CLK2 2
CLK1 3
GND 4
NB2305A
8 CLKOUT
7 CLK4
6 VDD
5 CLK3
Figure 1. Block Diagram
Figure 2. Pin Configuration
Table 1. PIN DESCRIPTION
Pin #
Pin Name
1 REF (Note1)
2 CLK2 (Note 2)
3 CLK1 (Note 2)
4 GND
5 CLK3 (Note 2)
6 VDD
7 CLK4 (Note 2)
8 CLKOUT (Note 2)
1. Weak pulldown.
2. Weak pulldown on all outputs.
Description
Input reference frequency, 5 V tolerant input.
Buffered clock output.
Buffered clock output.
Ground.
Buffered clock output.
3.3 V supply.
Buffered clock output.
Buffered clock output, internal feedback on this pin.
http://onsemi.com
2


Part Number NB2305A
Description Zero Delay Clock Buffer
Maker ON Semiconductor
Total Page 8 Pages
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