CY2X014
Low Jitter LVPECL Crystal Oscillator
Low Jitter LVPECL Crystal Oscillator
Features
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Functional Description
The CY2X014 is a high-performance and high-frequency XO.
The device uses a Cypress proprietary low-noise PLL to
synthesize the frequency from an embedded crystal.
The CY2X014 is available as a factory-configured device or as
a field-programmable device. Factory-configured devices are
configured
for
general
use
(see
Standard
and
Application-Specific Factory Configurations)
or they can be
customer specific.
Low jitter crystal oscillator (XO)
Less than 1 ps typical root mean square (RMS) phase jitter
Differential low-voltage positive emitter coupled logic
(LVPECL) output
Output frequency from 50 MHz to 690 MHz
Factory-configured or field-programmable
Integrated phase-locked loop (PLL)
Output enable or power-down function
Supply voltage: 3.3 V or 2.5 V
Pb-free package: 5.0 x 3.2 mm leadless chip carrier (LCC)
Commercial and industrial temperature ranges
Logic Block Diagram
4
CRYSTAL
OSCILLATOR
LOW-NOISE
PLL
CLK
OUTPUT
DIVIDER
5
CLK#
PROGRAMMABLE
CONFIGURATION
1
OE/PD#
6
V
DD
3
V
SS
Cypress Semiconductor Corporation
Document Number: 001-10179 Rev. *H
•
198 Champion Court
•
San Jose
,
CA 95134-1709
•
408-943-2600
Revised October 5, 2012
CY2X014
Contents
Pin Configurations ........................................................... 3
Pin Definitions .................................................................. 3
Standard and Application-Specific
Factory Configurations .................................................... 4
Programming Description ............................................... 5
Field-programmable CY2X014 .................................... 5
Factory-configured CY2X014 ...................................... 5
Programming Variables ................................................... 5
Output Frequency ........................................................ 5
Pin 1: Output Enable (OE) or Power Down (PD#) ....... 5
Industrial versus Commercial Device Performance .... 5
Absolute Maximum Conditions ....................................... 6
Operating Conditions ....................................................... 6
DC Electrical Characteristics .......................................... 7
AC Electrical Characteristics .......................................... 8
Typical Output Characteristics ....................................... 9
Switching Waveforms .................................................... 10
Termination Circuits ....................................................... 10
Ordering Information ...................................................... 11
Possible Configurations ............................................. 11
Ordering Code Definitions ......................................... 11
Package Diagrams .......................................................... 12
Acronyms ........................................................................ 13
Document Conventions ................................................. 13
Units of Measure ....................................................... 13
Document History Page ................................................. 14
Sales, Solutions, and Legal Information ...................... 15
Worldwide Sales and Design Support ....................... 15
Products .................................................................... 15
PSoC Solutions ......................................................... 15
Document Number: 001-10179 Rev. *H
Page 2 of 15
CY2X014
Pin Configurations
Figure 1. 6-pin Ceramic LCC pinout
OE/PD# 1
DNU 2
V
SS
3
6 V
DD
5 CLK#
4 CLK
Pin Definitions
Pin
1
Name
OE/PD#
I/O Type
CMOS input
Description
Output enable pin:
Active HIGH. If OE = 1, CLK is enabled.
Power-down pin:
Active LOW. If PD# = 0, the device is powered down and the clock
is disabled. The functionality of this pin is programmable.
Do not use:
DNU pins are electrically connected, but perform no function
Supply voltage:
2.5 V or 3.3 V
Ground
4, 5
2
6
3
CLK, CLK#
DNU
V
DD
V
SS
LVPECL output
Differential output clock
–
Power
Power
Document Number: 001-10179 Rev. *H
Page 3 of 15
CY2X014
Standard and Application-Specific Factory Configurations
Part Number
CY2X014LXI106T
CY2X014LXI122T
CY2X014LXI125T
CY2X014LXI132T
CY2X014LXI153T
CY2X014LXI155T
Output Frequency
106.25 MHz
122.88 MHz
125.00 MHz
132.8125 MHz
153.60 MHz
155.52 MHz
Pin 1 Function
OE
OE
OE
OE
OE
OE
RMS Phase Jitter (Random)
Offset Range
637 kHz to 10 MHz
12 kHz to 20 MHz
1.875 MHz to 20 MHz
12 kHz to 20 MHz
1.875 MHz to 20 MHz
637 kHz to 10 MHz
12 kHz to 20 MHz
250 kHz to 5 MHz
12 kHz to 5 MHz
12 kHz to 20 MHz
1.875 MHz to 20 MHz
1.875 MHz to 20 MHz
2.55 MHz to 20 MHz
637 kHz to 10 MHz
12 kHz to 20 MHz
1.875 MHz to 20 MHz
12 kHz to 20 MHz
20 kHz to 80 MHz
50 kHz to 80 MHz
4 MHz to 80 MHz
Jitter (Typical)
0.54 ps
0.81 ps
0.34 ps
0.84 ps
0.36 ps
0.52 ps
0.78 ps
0.46 ps
0.49 ps
0.52 ps
0.31 ps
0.31 ps
0.31 ps
0.47 ps
0.45 ps
0.29 ps
0.42 ps
0.44 ps
0.44 ps
0.19 ps
CY2X014LXI156T
CY2X014LXI159T
CY2X014LXI212T
CY2X014LXI311T
CY2X014LXI312T
CY2X014LXI622T
156.25 MHz
159.375 MHz
212.50 MHz
311.04 MHz
312.50 MHz
622.08 MHz
OE
OE
OE
OE
OE
OE
Document Number: 001-10179 Rev. *H
Page 4 of 15
CY2X014
Programming Description
The CY2X014 is a programmable device. Prior to being used in
an application, it must be programmed with the output frequency
and other variables described in
Programming Variables.
Two
different device types are available, each with its own
programming flow. They are described in the following sections.
Programming Variables
Output Frequency
The CY2X014 can synthesize a frequency to a resolution of one
part per million (ppm), but the actual accuracy of the output
frequency is limited by the accuracy of the integrated reference
crystal.
The CY2X014 has an output frequency range of 50 MHz to
690 MHz, but the range is not continuous. The CY2X014 cannot
generate frequencies in the ranges of 521 MHz to 529 MHz and
596 MHz to 617 MHz.
Field-programmable CY2X014
Field programmable devices are shipped unprogrammed and
must be programmed before being installed on a printed circuit
board (PCB). Customers use
CyClockWizard™
software to
specify the device configuration and generate a JEDEC
(extension .jed) programming file. Programming of samples and
prototype quantities is available using the CyClockWizard
software along with a
CY3675-CLKMAKER1 CyClockMaker
Clock Programmer Kit
with a
CY3675-LCC6A socket adapter.
Cypress’s value-added distribution partners also provide
programming services. Field-programmable devices are
designated with an ‘F’ in the part number. They are intended for
quick prototyping and inventory reduction.
The software and programmer kit hardware can be downloaded
from
www.cypress.com
by clicking the hyperlinks in the previous
paragraph.
Pin 1: Output Enable (OE) or Power Down (PD#)
Pin 1 is programmed as either OE or PD#. The OE function is
used to enable or disable the CLK output quickly, but it does not
reduce core power consumption. The PD# function puts the
device into a low power state, but the wake-up takes longer
because the PLL must reacquire the lock.
Industrial versus Commercial Device Performance
Industrial and commercial devices have different internal
crystals. They have a potentially significant impact on
performance levels for applications requiring the lowest-possible
phase noise. CyClockWIzard software allows the user to select
between and view the expected performance of both options.
Table 1. Device Programming Variables
Variable
Output frequency
Pin 1 function (OE or PD#)
Temperature range (commercial or industrial)
Factory-configured CY2X014
For ready-to-use devices, the CY2X014 is available with no field
programming required. Pre-configured devices (see
Standard
and Application-Specific Factory Configurations)
are available
for samples or orders, or a request for a custom configuration
can be made. All requests are submitted to the local Cypress
Field Application Engineer (FAE) or sales representative. After
the request is processed, the user receives a new part number,
samples, and datasheet with the programmed values. This part
number is used for additional sample requests and production
orders. The CY2X014 is one-time programmable (OTP).
Document Number: 001-10179 Rev. *H
Page 5 of 15
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