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NB4L6254 Fiches technique(PDF) 2 Page - ON Semiconductor

No de pièce NB4L6254
Description  2.5V / 3.3V Differential LVPECL 2x2 Clock Switch and Low Skew Fanout Buffer
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Fabricant  ONSEMI [ON Semiconductor]
Site Internet  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

NB4L6254 Fiches technique(HTML) 2 Page - ON Semiconductor

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NB4L6254
http://onsemi.com
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GND
VCC
OEA CLK0 CLK0
VCC
SEL0 GND
QB2
QB2
QB1
QB1
QB0
QB0
QA2
QA2
VCC
VCC
OEB
CLK1
QA1
VCC
GND
VCC
QA1
VCC
QA0
QA0
GND SEL1
CLK1
VCC
Figure 2. Pin Configuration (Top View)
LQFP−32
Table 1. PIN CONFIGURATION
Pin Name
I/O
Description
CLK0, CLK0
LVPECL Input
Differential reference clock signal input 0.
CLK1, CLK1
LVPECL Input
Differential reference clock signal input 1.
OEAb, OEB
LVCMOS Input
Output Enable
SEL0, SEL1
LVCMOS Input
Clock Switch Select
QA[0−2], QA[0−2]
QB[0−2], QB[0−2]
LVPECL Output
Differential LVPECL Clock Outputs, (banks A
and B) Typically terminated with 50 W resistor
to VCC – 2.0 V.
GND
Power Supply
Negative Supply Voltage
VCC
Power Supply
Positive supply voltage. All VCC pins must be
connected to the positive power supply for
correct DC and AC operation.
Table 2. FUNCTION TABLE
Control
Default
0
1
OEA
0
QA[0−2], QA[0−2] are active. Deassertion of
OEA can be asynchronous to the reference
clock without generation of output runt pulses
QA[0−2] = L, QA[0−2] = H (outputs disabled). Assertion of
OE can be asynchronous to the reference clock without
generation of output runt pulses
OEB
0
QB[0−2], QB[0−2] are active. Deassertion of
OEB can be asynchronous to the reference
clock without generation of output runt pulses
QB[0−2] = L, QB[0−2] = H (outputs disabled). Assertion of
OE can be asynchronous to the reference clock without
generation of output runt pulses
SEL0,
SEL1
00
Refer to Table 3
Refer to Table 3
Table 3. CLOCK SELECT CONTROL
SEL0
SEL1
CLK0 Routed To
CLK1 Routed to
Application Mode
0
0
QA[0:2] and QB[0:2]
1:6 Fanout of CLK0
0
1
QA[0:2] and QB[0:2]
1:6 Fanout of CLK1
1
0
QA[0:2]
QB[0:2]
Dual 1:3 Buffer
1
1
QB[0:2]
QA[0:2]
Dual 1:3 Buffer (Crossed)


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