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CDCE937PWR Scheda tecnica(PDF) 1 Page - Texas Instruments

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Il numero della parte CDCE937PWR
Spiegazioni elettronici  Flexible Low Power LVCMOS Clock Generator With SSC Support For EMI Reduction
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Produttore elettronici  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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CDCE937PWR Scheda tecnica(HTML) 1 Page - Texas Instruments

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CDCE(L)9xx Clock
Ethernet PHY
USB Controller
WiFi
FPGA
25 MHz
Copyright © 2016, Texas Instruments Incorporated
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Folder
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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
CDCE937, CDCEL937
SLAS564G – AUGUST 2007 – REVISED OCTOBER 2016
CDCEx937 Flexible Low Power LVCMOS Clock Generator
With SSC Support For EMI Reduction
1
1 Features
1
Member of Programmable Clock Generator
Family
CDCEx913: 1-PLL, 3 Outputs
CDCEx925: 2-PLL, 5 Outputs
CDCEx937: 3-PLL, 7 Outputs
CDCEx949: 4-PLL, 9 Outputs
In-System Programmability and EEPROM
Serial Programmable Volatile Register
Nonvolatile EEPROM to Store Customer
Setting
Flexible Input Clocking Concept
External Crystal: 8 MHz to 32 MHz
On-Chip VCXO: Pull Range ±150 ppm
Single-Ended LVCMOS up to 160 MHz
Free Selectable Output Frequency up to 230 MHz
Low-Noise PLL Core
PLL Loop Filter Components Integrated
Low Period Jitter (Typical 60 ps)
Separate Output Supply Pins
CDCE937: 3.3 V and 2.5 V
CDCEL937: 1.8 V
Flexible Clock Driver
Three User-Definable Control Inputs
[S0/S1/S2], for Example, SSC Selection,
Frequency Switching, Output Enable or Power
Down
Generates Highly Accurate Clocks for Video,
Audio, USB, IEEE1394, RFID, Bluetooth™,
WLAN, Ethernet™, and GPS
Generates Common Clock Frequencies Used
With TI-DaVinci™, OMAP™, DSPs
Programmable SSC Modulation
Enables 0-PPM Clock Generation
1.8-V Device Power Supply
Wide Temperature Range –40°C to 85°C
Packaged in TSSOP
Development and Programming Kit for Easy PLL
Design and Programming (TI Pro-Clock™)
2 Applications
D-TVs,
STBs,
IP-STBs,
DVD
Players,
DVD
Recorders, and Printers
3 Description
The CDCE937 and CDCEL937 devices are modular
PLL-based
low
cost,
high-performance,
programmable clock synthesizers, multipliers and
dividers. They generate up to 7 output clocks from a
single
input
frequency.
Each
output
can
be
programmed in-system for any clock frequency up to
230 MHz, using up to three independent configurable
PLLs.
The CDCEx937 has separate output supply pins,
VDDOUT, which is 1.8 V for CDCEL937 and to 2.5 V
to 3.3 V for CDCE937.
The input accepts an external crystal or LVCMOS
clock signal. If an external crystal is used, an on-chip
load capacitor is adequate for most applications. The
value of the load capacitor is programmable from 0 to
20 pF. Additionally, an on-chip VCXO is selectable
which allows synchronization of the output frequency
to an external control signal, that is, PWM signal.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
CDCE937,
CDCEL937
TSSOP (20)
6.50 mm x 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Typical Application Schematic


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