NB2304A
FBK
REF
CLKA1
PLL
CLKA2
B2
Extra Divider (−2)
CLKB1
Figure 1. Basic Block Diagram
(see Figures 11 and 12 for device specific Block Diagrams)
CLKB2
Table 1. CONFIGURATIONS (x = C for Commercial; I for Industrial)
Device
Feedback From
Bank A Frequency
NB2304Ax1
Bank A or Bank B
Reference
NB2304Ax1H
Bank A or Bank B
Reference
NB2304Ax2
Bank A
Reference
NB2304Ax2
Bank B
2 X Reference
Bank B Frequency
Reference
Reference
Reference B2
Reference
REF 1
CLKA1 2
CLKA2 3
GND 4
NB2304A
8 FBK
7 VDD
6 CLKB2
5 CLKB1
Figure 2. Pin Configuration
Table 2. PIN DESCRIPTION
Pin # Pin Name
Description
1 REF (Note 1) Input reference frequency, 5 V
tolerant input.
2 CLKA1 (Note 2) Buffered clock output, Bank A.
3 CLKA2 (Note 2) Buffered clock output, Bank A.
4
GND
Ground.
5 CLKB1 (Note 2) Buffered clock output, Bank B.
6 CLKB2 (Note 2) Buffered clock output, Bank B.
7
VDD
3.3 V supply.
8
FBK
PLL feedback input.
1. Weak pulldown.
2. Weak pulldown on all outputs.
http://onsemi.com
2