1
PS8384D 12/07/01
Product Features
Maximum rated frequency: 133 MHz
Low cycle-to-cycle jitter
Input to output delay, less than 200ps
External feedback pin allows outputs to be synchronized
to the clock input
5V tolerant input*
Operates at 3.3V V
DD
Test mode allows bypass of the PLL for system testing
purposes (e.g., IBIS measurements)
Clock frequency multipliers x to 4x dependent on option
Space-saving Packages:
16-pin, 150-mil SOIC (W)
16-pin 173-mil TSSOP (L)
Functional Description
The PI6C2308 is a PLL-based, zero-delay buffer, with the ability
to distribute eight outputs of up to 133 MHz at 3.3 V. Two banks of
four outputs exist, and, depending on product option ordered, can
supply either reference frequency, prescaled half frequency, or
multiplied 2x or 4x input clock frequencies. The PI6C2308 family has
a power-sparing feature: when input SEL2 is 0, the component will
3-state one or both banks of outputs depending on the state of input
SEL1. A PLL bypass test mode also exists. This product line is
available in high-drive and industrial environment versions.
An external feedback pin is used to synchronize the outputs to the
input; the relationship between loading of this signal and the other
outputs determines the input-output delay.
The PI6C2308 is characterized for both commercial and industrial
operation.
Notice:
This device is subject to import restriction. Please refer
to the Import Restriction Notice under the Ordering Information
section.
Block Diagram
Pin Configuration PI6C2308
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Zero-Delay Clock Buffer
PI6C2308
* FB_IN and CLKIN must reference the same voltage thresh-
olds for the PLL to deliver zero delay skewing
PLL
Option (-3, -4)
CLKIN
FB_IN
SEL1
SEL2
Decode
Logic
Decode
Logic
OUTA1
OUTA2
OUTA3
OUTA4
OUTB2
OUTB3
OUTB4
OUTB1
PI6C2308 (-1, -1H, -2, -3, -4)
2
PLL
CLKIN
FB_IN
SEL2
SEL1
OUTA1
OUTA2
OUTA3
OUTA4
OUTB2
OUTB3
OUTB4
OUTB1
PI6C2308-6
MUX
2
2
Option (-2, -3)
MUX
MUX
1
2
3
VDD
4
GND
5
OUTA2
6
OUTB2
7
SEL1
8
OUTB1
FB_IN
OUTA3
VDD
OUTB4
OUTB3
SEL2
16
15
14
13
12
11
10
9
CLKIN
OUTA1
GND
OUTA4
16-Pin
W, L
2
PS8384D 12/07/01
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PI6C2308
Zero Delay Clock Buffer
2
L
E
S
1
L
E
S
]
4
-
1
[
A
T
U
O
]
4
-
1
[
B
T
U
O
e
c
r
u
o
S
t
u
p
t
u
O
L
L
P
0
0
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t
a
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S
-
3
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t
a
t
S
-
3
L
L
P
F
F
O
0
1
L
L
P
e
t
a
t
S
-
3
L
L
P
N
O
1
0
N
I
K
L
C
N
I
K
L
C
N
I
K
L
C
F
F
O
1
1
L
L
P
L
L
P
L
L
P
N
O
Input Select Decoding for PI6C2308 (-1, -1H,-4)
e
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2
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N
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L
C
PI6C2308 Configurations
2
L
E
S
1
L
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S
]
4
-
1
[
A
T
U
O
]
4
-
1
[
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c
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L
L
P
0
0
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t
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-
3
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t
a
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-
3
L
L
P
F
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0
1
N
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L
C
2
/
N
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L
C
N
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L
C
F
F
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1
0
L
L
P
L
L
P
L
L
P
N
O
1
1
L
L
P
2
/
L
L
P
L
L
P
N
O
Input Select
Decoding for PI6C2308-6
Note:
1. Output phase is indeterminant (0 or 180 from CLKIN)
2
L
E
S
1
L
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S
]
4
-
1
[
A
T
U
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4
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0
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L
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0
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-
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L
L
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N
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1
0
N
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2
/
N
I
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N
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L
C
F
F
O
1
1
L
L
P
L
L
P
L
L
P
N
O
Input Select Decoding for PI6C2308 (-2,-3)
3
PS8384D 12/07/01
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PI6C2308
Zero Delay Clock Buffer
The relationship between loading of the FB_IN signal and other outputs determines the input-output delay. Zero delay is achieved when
all outputs, including feedback, are loaded equally.
Zero Delay and Skew Control
CLKIN Input to Output Bank Delay vs. Difference in Loading between FB_IN pin and OUTA/OUTB pins
Maximum Ratings
Supply Voltage to Ground Potential ............................................................................................................................. 0.5V to +7.0V
DC Input Voltage (Except CLKIN) ........................................................................................................................ 0.5V to V
DD
+0.5V
DC Input Voltage CLKIN ......................................................................................................................................................0.5 to 7V
Storage Temperature ................................................................................................................................................... 65C to +150C
Maximum Soldering Temperature (10 seconds)........................................................................................................................... 260C
Junction Temperature .................................................................................................................................................................. 150C
Static Discharge Voltage (per MIL-STD-883, Method 3015) .................................................................................................... >2000V
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Pin Description
Output Load Difference: FB_IN Load - OUTA/OUTB Load (pF)
CLKIN - Input to OUT
A/OUTB Dela
y (ps)
600
800
400
200
0
-200
-400
-600
-800
-900
-1000
-25
-20
-15
-10
-5
0
5
10
15
20
25
PI6C2308-1H
PI6C2308-1,2,3,4,6
4
PS8384D 12/07/01
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PI6C2308
Zero Delay Clock Buffer
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Operating Conditions
(V
CC
= 3.3V 0.3V)
DC Electrical Characteristics for Industrial Temperature Devices
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PS8384D 12/07/01
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PI6C2308
Zero Delay Clock Buffer
Notes:
1. See Switching Waveforms on page 7.
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AC Electrical Characteristics for Industial Temperature Devices
6
PS8384D 12/07/01
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PI6C2308
Zero Delay Clock Buffer
Notes:
1. See Switching Waveforms on page 7.
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AC Electrical Characteristics
for Commercial Temperature Device
DC Electrical Characteristics for Commercial Temperature Devices
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PS8384D 12/07/01
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PI6C2308
Zero Delay Clock Buffer
Switching Waveforms
tLOW
tHIGH
VDD/2
VDD/2
VDD/2
tF
tR
0.8V
2.0V
0.8V
2.0V
OUTPUT
0V
3.3V
VDD/2
VDD/2
VDD/2
VDD/2
VDD/2
VDD/2
tSK(O)
OUTPUT
OUTPUT
t0
INPUT
FB_IN
tSK(D)
OUTPUT Device 1
OUTPUT Device 2
Duty Cycle Timing
All Outputs Rise/Fall Time
Output-Output Skew
Input-Output Propagation Delay
Device-Device Skew
tDC =
tHIGH
tLOW
tHIGH +
VDD
CLOAD
VDD
GND
GND
CLK out
OUTPUTS
Test Circuit 1
Test Circuit 2
0.1F
0.1F
Test Circuit for all parameters except t
SLEW
VDD
10pF
VDD
GND
GND
CLK out
OUTPUTS
0.1F
0.1F
Test Circuit for t
SLEW
,Output slew rate on 1H device
1k
9
1k
9
8
PS8384D 12/07/01
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12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
PI6C2308
Zero Delay Clock Buffer
16-Pin SOIC (W) Package
Note: Controlling dimensions in millimeters. Ref: JEDEC MS - 012 AC
16-Pin TSSOP (L) Package
SEATING PLANE
.050
BSC
1
16
0-8
.149
.157
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
3.78
3.99
.386
.393
9.80
10.00
1.27
.053
.068
1.35
1.75
.2284
.2440
5.80
6.20
.0040
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.0260
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0.508
0.393
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.0075
.0098
0.25
0.50
.0099
.0196
x 45
0.19
0.25
.016
.050
0.41
1.27
REF
.193
.201
.047
max.
.002
.006
SEATING
PLANE
.0256
BSC
.018
.030
.004
.008
.252
BSC
1
16
.169
.177
X.XX
X.XX
DENOTES CONTROLLING
DIMENSIONS IN MILLIMETERS
0.05
0.15
6.4
0.45
0.75
0.09
0.20
4.3
4.5
1.20
4.9
5.1
0.65
0.19
0.30
.007
.012
9
PS8384D 12/07/01
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PI6C2308
Zero Delay Clock Buffer
Pericom Semiconductor Corporation
2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
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I
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Ordering Information (Commercial Temperature Device)
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Ordering Information (Industrial Temperature Device)
Import Restriction Notice:
Due to an agreement to settle a patent dispute, this device is only available for sale outside of the US and may not be subsequently
re-imported into the US as an individual component or as incorporated into equipment. Any sale is expressly conditioned on the
customer's agreement not to export the device or any product or equipment containing the device to the United States. Pericom
disclaims any liability for indemnity or other obligation or warranty if the devices or any product or equipment containing the
devices are imported in violation of this agreement.
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