PI6CX100-27
27 MHz 3.3V VCXO for
Set-Top Box Applications
Features
•
3.3V operating voltage
•
Uses an inexpensive external crystal
•
On-chip VCXO with pull range of 240ppm
•
VCXO tuning voltage from 0 to 3.3V
•
10mA output drive at CMOS levels
•
Available in SOIC package
Description
The PI6CX100-27 is a low-cost, high-performance 3.3V VCXO,
designed to replace expensive VCXO modules. The on-chip
Voltage Controlled Crystal Oscillator accepts a 0 to 3.3V input
voltage to cause clocks to vary by ±120ppm. This device uses an
inexpensive external pullable crystal at 27 MHz to produce the
same output frequency.
The PI6CX100-27 is designed for Set-Top Box applications.
Block Diagram
V
IN
X1
X2
Pin Configuration
X1
Output
Buffer
CLKOUT
Voltage
Controlled
Crystal
Oscillator
1
3
4
W
8
6
5
X2
NC
NC
2
8-Pin
7
VIN
GND
VDD
CLKOUT
Pin Description
Pin Name
X1, X2
NC
V
IN
GND
CLKOUT
V
DD
Note:
1. 0.1µF or 0.01µF bypass capacitor is required.
Number
1, 8
2
3
4
5
6
Type
I
I
PWR
O
PWR
Description
Crystal Connection
No Connection
Voltage Input to VCXO
Ground
Clock Output
Power Supply
(2)
1
PS8576C
09/22/04
PERICOM [ PERICOM SEMICONDUCTOR CORPORATION ]
