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PI6C2401 Datasheet(PDF) 1 Page - Pericom Semiconductor Corporation

Part No. PI6C2401
Description  Phase-Locked Loop Clock Driver
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Maker  PERICOM [Pericom Semiconductor Corporation]
Homepage  http://www.pericom.com
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 1 page
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1
PS8419C
01/12/05
1
2
3
AVCC
4
CLK_OUT
CLK_IN
GND
FB_IN
8
7
6
5
AGND
VCC
S
Product Pin Configuration
Logic Block Diagram
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PI6C2401
Product Features
• High-Performance Phase-Locked-Loop Clock Distribution for
Networking, ATM, 100/134 MHz Registered DIMM Synchro-
nous DRAM modules for server/workstation/PC applications
• Zero Input-to-Output delay
• Lowjitter:Cycle-to-Cyclejitter ±100psmax.
• On-chip series damping resistor at clock output drivers
for low noise and EMI reduction
• Operates at 3.3V VCC
• Packaged in Plastic 8-pin SOIC Package (W)
Pb-free and Green Available
• Wide range of Clock Frequencies
Phase-Locked Loop Clock Driver
Product Description
The PI6C2401 features a low-skew, low-jitter, phase-locked loop
(PLL) clock driver. By connecting the feedback CLK_OUT output
to the feedback FB_IN input, the propagation delay from the
CLK_IN input to any clock output will be nearly zero.
Application
If the system designer needs more than 16 outputs with the features
just described, using two or more zero-delay buffers such as
PI6C2509Q, and PI6C2510Q, is likely to be impractical. The device-
to-device skew introduced can significantly reduce
the performance. Pericom recommends the use of a zero-delay
buffer and an eighteen output non-zero-delay buffer . As shown in
Figure 1, this combination produces a zero-delay buffer with all the
signal characteristics of the original zero-delay buffer, but with as
many outputs as the non-zero-delay buffer part. For example, when
combined with an eighteen output non-zero delay buffer, a system
designer can create a seventeen-output zero-delay buffer.
Figure 1. This Combination Provides Zero-Delay Between
the Reference Clocks Signal and 17 Outputs
17
Zero Delay
Buffer
PI6C2401
Reference
Clock
Signal
CLK_OUT
Feedback
18 Output
Non-Zero
Delay
Buffer
Se
c
r
u
o
S
t
u
p
t
u
On
w
o
d
t
u
h
S
L
L
P
1L
L
PN
0N
I
_
K
L
CY
Control Input
CLK_IN
FB_IN
S
PLL
CLK_OUT
8-Pin
W




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