PI6CX100-272
27 MHz 3.3V VCXO
Product Features
•
3.3V operating voltage
•
Uses an inexpensive external crystal
•
On-chip VCXO with pull range of 400ppm
•
VCXO tuning voltage from 0 to 3.3V
•
10mA output drive at CMOS levels
•
Packaging: (Pb-free & Green available)
—8-pin SOIC (W)
Product Description
The PI6CX100-272 is a low-cost, high-performance 3.3V VCXO,
designed to replace expensive VCXO modules. The on-chip Volt-
age Controlled Crystal Oscillator accepts a 0 to 3.3V input voltage
to cause clocks to vary from -250 ppm to +150 ppm. This device
uses an inexpensive external pullable crystal at 27 MHz to produce
the same output frequency.
The PI6CX100-272 is designed for Set-Top Box applications.
Logic Block Diagram
V
IN
X1
X2
Product Pin Configuration
X1
NC
CLKOUT
Voltage
Controlled
Crystal
Oscillator
1
3
4
W
8
6
5
X2
NC
2
8-Pin
7
VIN
GND
CLKOUT
V
DD
Pin Description
Pin Name
X1, X2
NC
V
IN
GND
V
DD
CLKOUT
Note:
1. 0.1µF or 0.01µF bypass capacitor is required.
Number
1, 8
2, 7
3
4
5
6
I
PWR
O
PWR
Type
I
Description
Crystal Connection
No Connection
Voltage Input to VCXO
Ground
Clock Output
Power Supply
(1)
1
PS8813
02/27/06
PI6CX100-272
27 MHz 3.3V VCXO
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines,
not tested.)
Storage Temperature .........................................–55°C to 125°C
Ambient Temperature ........................................–40°C to 85°C
Supply Voltage V
DD
..............................................–0.5V to 7V
Inputs/Outputs Voltage.............................. –0.5V to V
DD
+0.5V
Output Current ..................................................................10mA
Soldering Lead Temperature (10s)................................... 260°C
Junction Temperature .......................................–50°C to 150°C
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
specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability.
DC Electrical Characteristics
Symbol
V
DD
V
OH
V
OL
I
OH
I
OL
I
DD
R
S
f
O
C
L
(Unless otherwise specified, V
DD
= 3.3V, f
O
= 27 MHz, V
IN
= 1.65V, Load = 15pF, T
A
= 25
o
C)
Desciption
Operating Voltage
Output High Volage
Output Low Voltage
Output High Current
Output Low Current
Supply Current
Negative Resistance
Input Frequency
Output load Capacitance
I
OH
=-12mA
I
OL
= -12mA
V
OH
= V
DD
-0.5V
V
OL
=0.5V
C
L
= 15pF
V
IN
= 0V
20
12
5
-150
27
15
30
30
Ω
MHz
pF
Test Condidtion
Min.
3.135
2.8
0.5
-12
mA
Typ.
3.3
Max.
3.465
V
Units
AC Electrical Characteristics
Symbol
T
R/
T
f
T
d
∆f
T
j
Lin
T
START
(Unless otherwise specified, f
O
= 27 MHz, Load = 15pF, T
A
= 25
o
C)
Desciption
Rise / Fall Time
Duty Cycle
Pull Range
Cycle-to-Cycle Jitter
Linearity
Oscillator Start Time
Test Condidtion
0.1V
DD
- 0.9V
DD
0.5V
DD
V
IN
= 0 - V
DD
C
L
= 15pf
V
IN
= 0.1V
DD
- 0.9 V
DD
V
DD
= 0.9V
DD
Trigger
Min.
45
400
50
±10
1.5
Typ.
1.5
Max.
6
55
Units
ns
%
ppm
ps
%
ms
10
2
PS8813
02/27/06
PI6CX100-272
27 MHz 3.3V VCXO
Pullability Characteristics
½½½
½½½
½½½½½½½½½½
½½
½½½
½½½½
½½½½
½½½½
½½½½½½½
½
½½½
½
½½½
½
½½½
½
Recommended Crystal Specifications
(PI6CX100-272 is optmized to work with SRX6737 Crystal)
Description
Mode of Oscillation
Frequency (typ)
Frequency Tolerance
Temperature plus Aging Stability`
Operating Temperature
C0 /C1
Load Capacitance (C
L
)
Equivalent Series Resistance (ESR)
Crystal
Fundamental
27.000 MHz
±30ppm
±50ppm
-20°C to +70°C
240 (max.)
14pF
35Ω (max.)
Measurement Circuit
X1
NC
VIN
VIN
GND
X2
NC
CLKOUT
VDD
0.01µF
3.3V
C
L
= 15pF
Note:
1. 0.1µF or 0.01µF bypass capacitor is required.
2. Crystal frequency is 27.000 MHz.
3
PS8813
02/27/06
PI6CX100-272
27 MHz 3.3V VCXO
Packaging Mechanical: Plastic 8-pin SOIC (W)
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½½½½ ½½½½½½½½½½½½½½½½½½
½½½½ ½½½½½½½½½½½½½½
Ordering Information
(1,2,3)
Ordering Code
PI6CX100-272W
PI6CX100-272WE
Package Code
W
W
Package Type
8-pin, 150mil wide SOIC
8-pin, 150mil wide SOIC
Operating Range
Industrial
Industrial
Notes:
1. Thermal characteristics can be found on the company web site at http://www.pericom.com/packaging/
2. E = Pb-free and Green
3. X suffix = Tape/Reel
Pericom Semiconductor Corporation • 1-800-435-2336 •
4
http://www.pericom.com
PS8813
02/27/06