nb3n65027 ON Semiconductor, nb3n65027 Datasheet - Page 2

• Manufacturer Part Number: nb3n65027
• Description: 3.3v Programmable 3-pll Clock Synthesizer With 6 Lvttl/lvcmos Outputs W/oe
• Manufacturer: ON Semiconductor

1. All VDD and GND pins must be externally connected to a power supply for proper operation.
Table 1. PIN DESCRIPTION
Pin Number
10
12
13
14
15
16
17
18
19
20
11
1
2
3
4
5
6
7
8
9
Pin Name
REFOUT
X1/ICLK
CLKC1
CLKC2
CLKB2
CLKB1
CLKA2
CLKA1
ACS0
ACS1
BCS0
BCS1
VDD
GND
CCS
GND
VDD
NC
OE
X2
Two−Level Input
Two−Level Input
Tri−Level Input
Tri−Level Input
Tri−Level Input
(Note 1)
Pin Type
Output
Output
Output
Output
Output
Output
Output
Power
Power
Power
Power
Input
Input
Input
−
X1/ICLK
CLKC1
CLKC2
CLKB2
CLKB1
Figure 2. Pinout: QSOP−20 (Top View)
ACS0
ACS1
GND
VDD
X2
Crystal connection. Connect to a fundamental crystal or leave unconnected for a clock
input.
Crystal or Clock input connection. If a clock input is used, drive it into X1 and leave X2
unconnected.
A Clock Select 0. Selects outputs on CLKA1 and CLKA2 per table on page 3.
Connect to +3.3 V. Must be the same as pin 16.
A Clock Select 1. Selects outputs on CLKA1 and CLKA2 per table on page 3. Internal
pull−up.
Connect to ground.
Output Clock C1. Depends on setting of CCS per table on page 3.
Output Clock C2. Depends on setting of CCS per table on page 3. Same as CLKC1.
Output Clock B2. Depends on setting of BCS1, 0 per table on page 3.
Output Clock B1. Depends on setting of BCS1, 0 per table on page 3.
Clock C select pin. Selects outputs on CLKC1 and CLKC2 per table on page 3.
No Connect
Output Clock A2. Depends on setting of ACS1, 0 per table on page 3.
Connect to ground.
Output enable. Tri−states all outputs when low. Internal pull−up.
Connect to +3.3 V. Must be the same as pin 4.
Output Clock A1. Depends on setting of ACS1, 0 per table on page 3.
Buffered reference clock output. Same frequency as crystal or clock input.
B Clock Select 0. Selects outputs on CLKB1 and CLKB2 per table on page 3.
B Clock Select 1. Selects outputs on CLKB1 and CLKB2 per table on page 3. Internal
pull−up.
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1
2
3
4
5
6
7
8
9
10
2
20
19
18
17
16
15
14
13
12
11
BCS1
BCS0
REFOUT
CLKA1
VDD
OE
GND
CLKA2
NC
CCS
Pin Description