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PI6C2308A4L Datasheet

  • PI6C2308A4L

  • 3.3V Zero-Delay Buffer

  • 388.78KB

  • 10頁(yè)

  • PERICOM   PERICOM

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PI6C2308A
3.3V Zero-Delay Buffer
Product Features
鈥?/div>
10 MHz to 140 MHz operating range
鈥?/div>
Zero input-output propagation delay, adjustable by
capacitive load on FBK input
鈥?/div>
Multiple configurations, see 聯(lián)Available PI6C2308A
Configurations聰 table
鈥?/div>
Input to output delay, less than 150ps
鈥?/div>
Multiple low skew outputs
- Output-output skew less than 200ps
- Device-device skew less than 500ps
- Two banks of four outputs, Hi-Z by two select inputs
鈥?/div>
Low Jitter, less than 200ps
鈥?/div>
3.3V operation
鈥?/div>
Available in industrial &commercial temperatures
鈥?/div>
Packages:
- Space-saving 16-pin, 150-mil SOIC (W)
- 16-pin TSSOP (L)
Functional Description
Providing two banks of four outputs, the PI6C2308A is a 3.3V zero-
delay buffer designed to distribute clock signals in applications
including PC, workstation, datacom, telecom, and high-performance
systems. Each bank of four outputs can be controlled by the select
inputs as shown in the Select Input Decoding Table.
The PI6C2308A provides 8 copies of a clock signal that has 150ps
phase error compared to a reference clock. The skew between the
output clock signals for PI6C2308A is less than 200ps. When there
are no rising edges on the REF input, the PI6C2308A enters a power
down state. In this mode, the PLL is off and all outputs are Hi-Z. This
results in less than 12碌A(chǔ) of current draw. The Select Input Decoding
table shows additional examples when the PLL shuts down. The
PI6C2308A configuration table shows all available devices.
The base part, PI6C2308A-1, provides output clocks in sync with
a reference clock. With faster rise and fall times, the PI6C2308A-1H
is the high-drive version of the PI6C2308A-1. Depending on which
output drives the feedback pin, PI6C2308A-2 provides 2X and 1X
clock signals on each output bank. The PI6C2308A-3 allows the user
to obtain 4X and 2X frequencies on the outputs. The PI6C2308A-4
provides 2X clock signals on all outputs. PI6C2308A (-1, -2, -3, -4)
allows bank B to be Hi-Z when all output clocks are not required.The
PI6C2308A-6 allows bank B to switch from Reference clock to half
of the frequency of Reference clock using the control inputs S1 and
S2 if Bank A is connected to feedback FBK. In addition, using the
control inputs S1 and S2, the PI6C2308A-6 allows bank A to switch
from Reference clock to 2X the frequency of Reference clock if Bank
B is connected to feedback FBK. For testing purposes, the select
inputs connect the input clock directly to outputs.
Block Diagrams
梅2
REF
PLL
MUX
FBK
CLKA1
CLKA2
CLKA3
CLKA4
梅2
Extra Divider (-3, -4)
S2
S1
Select Input
Decoding
CLKB1
Extra Divider (-2,-3)
CLKB2
CLKB3
CLKB4
PI6C2308A (-1, -1H, -2, -3, -4)
Pin Configuration PI6C2308A (-1, -1H, -2, -3, -4, -6)
REF
PLL
MUX
FBK
CLKA1
CLKA2
CLKA3
REF
CLKA1
CLKA2
VDD
1
2
3
4
5
6
7
8
16
15
FBK
CLKA4
CLKA3
VDD
GND
CLKB4
CLKB3
S1
S2
S1
Select Input
Decoding
梅2
MUX
CLKA4
16-Pin
13
W, L
12
11
10
9
14
GND
CLKB1
CLKB1
CLKB2
S2
PI6C2308A-6
CLKB2
CLKB3
CLKB4
1
PS8385B
08/03/00

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