© Semiconductor Components Industries, LLC, 2006

November, 2006 − Rev. 5

1

Publication Order Number:

NB2305A/D

NB2305A

3.3 V Zero Delay

Clock Buffer

The NB2305A is a versatile, 3.3 V zero delay buffer designed to

distribute high−speed clocks. It accepts one reference input and drives

out five low−skew 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 on−chip PLL’s that

lock to an input clock on the REF pin. The PLL feedback is on−chip

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 cycle−to−cycle 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

PCI Bus Frequencies

Based Systems

*x = C for Commercial; I for Industrial.

MARKING

DIAGRAMS*

XXXX

= Device Code

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.

1

8

SOIC−8

D SUFFIX

CASE 751

See detailed ordering and shipping information in the package

dimensions section on page 6 of this data sheet.

ORDERING INFORMATION

http://onsemi.com

1

8

TSSOP−8

DT SUFFIX

CASE 948J

XXXX

ALYW

G

1

8

XXX

ALYWG

G

1

8