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PI6C4512WE

P1-P3P4-P4
1
PS8763B 03/30/06
Features
• Zero ppm multiplication error
• Input crystal frequency range: 5 - 30MHz
• Input clock frequency range: 4 - 50MHz
• Output clock frequencies range ≤ 200MHz
• Period jitter ≤ 100ps (typ)
• 9 Selectable frequencies controlled by S
0
and S
1
pins
• Supply voltage: 3.3V ±10% or 5.0V ±10%
• Packaging (Pb-Free and Green):
—8-pin SOIC (W)
Description
The PI6C4512 is a precision general-purpose clock synthesizer with
fmax≤ 200MHz. The PI6C4512 uses an external low-cost crystal
to generate a very accurate rate and stable system clocks.
Block Diagram
PI6C4512
PLL Clock Multiplier
Pin Conguration
S
0
S
1
CLK
PLL Clock Synthesis
and
Control Circuit
Output
Buffe
r
Output
Buffe
r
Crystal
Oscillator
X2
X1 / ICLK
REF
1
2
3
4
8
7
6
5
X1 / ICLK
V
CC
GND
REF
X2
S
1
S
0
CLK
Clock Output Table
(1)
S
1
S
0
CLK
0 0 x 4
0 M x (16/3)
0 1 x 5
M 0 x 2.5
M M x 2
M 1 x (10/3)
1 0 x 6
1 M x 3
1 1 x 8
Notes:
1. M = Mid-level (unconnected, biases to V
CC
/2).
06-0034
PI6C4512
PLL Clock Multiplier
2
PS8763B 03/30/06
Pin Description
Name Pin Description
X1/ICLK 1 Crystal connection or clock input.
V
CC
2 Supply voltage: 3.3V ±10% or 5.0V ±10%
GND 3 Connect to GND
REF 4 Buffered crystal oscillator output clock
CLK 5 Clock output
S
0
6 Multiplier select pin 0. Connect to GND or V
CC
or oat (no connection).
S
1
7 Multiplier select pin 1. Connect to GND or V
CC
or oat (no connection).
X2 8 Crystal connection. Leave unconnected for clock input.
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested)
Storage temperature ......................................................-65°C to +150ºC
Ambient Operating Temperature ....................................... 0°C to +70ºC
Supply Voltage to Ground Potential (V
CC
)..................... -0.3V to +7.0V
Inputs (Referenced to GND)................................... -0.5V to V
CC
+0.5V
Clock Output (Referenced to GND) ....................... -0.5V to V
CC
+0.5V
Soldering Temperature (Max of 10 seconds).................................260ºC
Note:
Stresses greater than those listed under MAXIMUM RATINGS
may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other
conditions above those indicated in the operational sections of this
specication is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability.
External Components
The PI6C4512 requires a minimum number of external components for proper operation. Decoupling capacitors of 0.1µF || 0.01µF
should be connected between each V
DD
and GND and placed as close to the chip as possible. A series termination resistor of 33Ω
may be used for clock outputs. If a crystal is used, it should be a fundamental mode, parallel resonant crystal. Crystal capacitors
should be connected from X
1
to ground and from X
2
to ground to according to the crystal specications. The value of capacitors is
given by the following equation, where C
L
is the crystal load capacitance: Crystal caps (pF) = (C
L
-15) x 2.
Recommended Operation Conditions
Symbol Description Test Condition Min. Typ. Max. Units
V
CC
Supply Voltage 3 5.5 V
T
A
Operating Temperature 0 +70 °C
06-0034
PI6C4512
PLL Clock Multiplier
3
PS8763B 03/30/06
DC Electrical Characteristics (V
CC
= 3.3V ± 10% and 5.0V ± 10%, T
A
= 0°C to +70°C, unless otherwise noted)
Symbol Description Test Condition Pin Min. Typ. Max. Units
V
CC
Supply voltage V
CC
3 5.5 V
I
CC
Supply current No load, 20MHz crystal V
CC
` 12 30 mA
V
IH
Input logic HIGH ICLK (V
CC
/2) +1 V
CC
/2 V
V
IL
Input logic LOW ICLK V
CC
/2 (V
CC
/2)-1 V
V
IH
Input logic HIGH S
0
, S
1
V
CC
-0.5 V
V
IM
Input mid-level S
0
, S
1
V
CC
/2 V
V
IL
Input logic LOW S
0
, S
1
0.5 V
V
OH
High-level output voltage I
OH
= -12mA CLK, REF 2.4 V
V
OL
Low-level output voltage I
OL
= +12mA CLK, REF 0.4 V
I
S
Short circuit current CLK ±70 mA
AC Electrical Characteristics (V
CC
= 3.3V ±10% and 5.0V ± 10%, T
A
= 0°C to +70°C, unless noted)
Symbol Parameter Test Condition Pin Min. Typ. Max. Unit
F
IN
Input Frequency
Crystal ICLK 5 30 MHz
Clock ICLK 4 50 MHz
F
OUT
Output frequency
(1)
V
CC
: 4.5V to 5.5V CLK 20 200 MHz
V
CC
: 3.0V to 3.6V CLK 20 180 MHz
T
R
Output clock rise time
0.8V to 2.0V,
C
L
= 15pF load
CLK 1 ns
T
F
Output clock fall time
2.0V to 0.8V,
C
L
= 15pF load
CLK 1 ns
T
DC
Output clock duty-cycle
At V
CC
/2, f ≤ 150MHz CLK 45 50 55
%
At V
CC
/2, f > 150MHz CLK 40 50 60
BW PLL bandwidth f ≤ 150MHz CLK 10 kHz
T
PJ
Period Jitter 100MHz to 200MHz CLK 100 250 ps
Notes:
1. The phase relationship between input and output clocks can change at power up.
Recommended Crystal Specications
Parameter Value Units
Mode of Oscillation Fundamental AT
Frequency 5 - 30 MHz
Frequency Tolerance ±50 PPM
Temperature and Aging Stability ±50 PPM
CO/CI Ratio 240
Load Cap 18 pF
Equivalent Series Resistance 30 Ω
Recommended Crystal
Pericom recommends the Pericom 49S SMD series crystal,
which is a low cost, low prole SMD crystal packaged in a
HC-49/u short SMD package.
06-0034
P1-P3P4-P4

PI6C4512WE

Mfr. #:
Buy PI6C4512WE
Manufacturer:
Description:
IC PLL CLOCK MULT 8-SOIC
Lifecycle:
New from this manufacturer.
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