1
PS8419C 01/12/05
1
2
3
AV
CC
4
CLK_OUT
CLK_IN
GND
FB_IN
8
7
6
5
AGND
V
CC
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
Low jitter: Cycle-to-Cycle jitter 100ps max.
On-chip series damping resistor at clock output drivers
for low noise and EMI reduction
Operates at 3.3V V
CC
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
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Control Input
CLK_IN
FB_IN
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PLL
CLK_OUT
8-Pin
W
PI6C2401
Phase-Locked Loop Clock Driver
2
PS8419C 01/12/05
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DC Specifications
(Absolute maximum ratings over operating free-air temperature range)
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Note: Stress beyond those listed under "absolute maximum ratings" may cause permanent damage to the device.
Note:
1. Continuous output current
PI6C2401
Phase-Locked Loop Clock Driver
3
PS8419C 01/12/05
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Recommended Operating Conditions
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Electrical Characteristics
(Over recommended operating free-air temperature range Pull Up/Down Currents, V
CC
= 3.0V)
AC Specifications
Timing Requirements
(Over recommended ranges of supply voltage and operating free-air temperature)
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Switching Characteristics
(Over recommended ranges of supply voltage and operating free-air temperature, C
L
=30pF)
Note: These switching parameters are guaranteed by design.
PI6C2401
Phase-Locked Loop Clock Driver
4
PS8419C 01/12/05
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Pericom Semiconductor Corporation 1-800-435-2336 www.pericom.com
Package Mechanical Information
Plastic 8-pin SOIC Package
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Ordering Information
.0040
.0098
SEATING PLANE
.013
.020
.050
BSC
.016
.0075
.0098
1
8
.0099
.0196
0-8
.050
.149
.157
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
3.78
3.99
.189
.196
4.80
5.00
1.27
.016
.026
1.35
1.75
.2284
.2440
5.80
6.20
0.406
0.660
0.330
0.508
0.10
0.25
0.40
1.27
0.19
0.25
0.25
0.50
x 45
.053
.068
REF
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