NBC12439 Ver la hoja de datos (PDF) - ON Semiconductor
Número de pieza
componentes Descripción
Fabricante
NBC12439 Datasheet PDF : 20 Pages
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NBC12439, NBC12439A
XTAL_SEL 15
FREF_EXT
3
4
10--20MHz
5
6
OE
28
S_LOAD
7
P_LOAD
27
S_DATA
26
S_CLOCK
PWR_DOWN +3.3 or 5.0 V
2
÷2
FREF
PHASE
DETECTOR
VCO
POWER
DOWN
XTAL1
OSC
XTAL2
7--BIT ÷ M
COUNTER
÷2
400--800
MHz
LATCH
÷N
(1, 2, 4, 8)
LATCH
1
PLL_VCC
+3.3 or 5.0 V
21, 25
VCC
24
23
FOUT
FOUT
20
TEST
0
1
7--BIT SR
0
1
2--BIT SR
LATCH
3--BIT SR
8 ¤ 14
17, 18
7
M[6:0]
2
N[1:0]
Figure 1. Block Diagram (28--Lead PLCC)
22, 19
Table 1. Output Division
N [1:0]
00
01
10
11
Output Division
2
4
8
1
Table 2. XTAL_SEL And OE
Input
0
PWR_DOWN
XTAL_SEL
OE
FOUT
FREF_EXT
Outputs Disabled
1
FOUT ÷ 16
XTAL
Outputs Enabled
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2
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