PRELIMINARY
CY2XF23
High Performance LVDS Oscillator with
Frequency Margining - I2C Control
Cypress Semiconductor Corporation
•
198 Champion Court
•
San Jose
, CA 95134-1709
•
408-943-2600
Document Number: 001-53145 Rev. *B
Revised September 18, 2009
Features
■ Low Jitter Crystal Oscillator (XO)
■ Less than 1ps Typical RMS Phase Jitter
■ Differential LVDS Output
■ Output Frequency from 50 MHz to 690 MHz
■ Frequency Margining through I2C Bus
■ Factory Configured or Field Programmable
■ Integrated Phase-Locked Loop (PLL)
■ Pb-Free Package: 5.0 x 3.2 mm LCC
■ Supply Voltage: 3.3V or 2.5V
■ Commercial and Industrial Temperature Ranges
Functional Description
The CY2XF23 is a high performance and high frequency Crystal
Oscillator (XO). It uses a Cypress proprietary low noise PLL to
synthesize the frequency from an integrated crystal. The output
frequency can be changed using the I2C Bus serial interface,
allowing easy frequency margin testing in applications.
The CY2XF23 is available as a factory configured device or as
a field programmable device.
Pinouts
Figure 1. Pin Diagram - 6 Pin Ceramic LCC
Logic Block Diagram
PROGRAMMABLE
CONFIGURATION
OUTPUT
DIVIDER
1
SDA
CRYSTAL
OSCILLATOR
LOW-NOISE
PLL
4
CLK
5
CLK#
2
SCL
I2C
INTERFACE
1
3
SDA
VSS
VDD
CLK
6
4
2
5CLK#
SCLK
Table 1. Pin Definitions - 6 Pin Ceramic LCC
Pin
Name
I/O Type
Description
1
SDA
I/O
I2C Serial Data
2SCLK
CMOS Input
I2C Serial Clock
4, 5
CLK, CLK#
LVDS Output
Differential Output Clock
6
VDD
Power
Supply Voltage: 2.5V or 3.3V
3
VSS
Power
Ground
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