CDCEL937PWR ,Programmable 3-PLL VCXO Clock Synthesizer with 1.8-V LVCMOS Outputs 20-TSSOP -40 to 85Features 2 ApplicationsD-TVs, STBs, IP-STBs, DVD Players, DVD1• Member of Programmable Clock Genera ..
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CL431 , Precision Adjustable Shunt Reference
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CDCEL937PW-CDCEL937PWR
Programmable 3-PLL VCXO Clock Synthesizer with 1.8-V LVCMOS Outputs
CDCE(L)9xx ClockEthernet PHY
USB Controller
WiFi
FPGA
25 MHz
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CDCE937, CDCEL937SLAS564G –AUGUST 2007–REVISED OCTOBER 2016
CDCEx937 Flexible Low Power LVCMOS Clock Generator
With SSC Support For EMI Reduction Features Memberof 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 EEPROMto Store Customer
Setting Flexible Input Clocking Concept External Crystal:8 MHzto32 MHz On-Chip VCXO: Pull Range ±150 ppm Single-Ended LVCMOSupto 160 MHz Free Selectable Output Frequencyupto 230 MHz Low-Noise PLL Core PLL Loop Filter Components Integrated Low Period Jitter (Typical60 ps) Separate Output Supply Pins CDCE937: 3.3V and 2.5V CDCEL937: 1.8V Flexible Clock Driver Three User-Definable Control Inputs
[S0/S1/S2], for Example, SSC Selection,
Frequency Switching, Output Enableor 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 SSC Modulation Clock Generation Supplyto 85°C Kitfor Easy PLL
ApplicationsD-TVs, STBs, IP-STBs, DVD Players, DVD
Recorders, and Printers
DescriptionThe CDCE937 and CDCEL937 devices are modular
PLL-based low cost, high-performance,
programmable clock synthesizers, multipliers and
dividers. They generate upto7 output clocks froma
single input frequency. Each output can be
programmed in-system for any clock frequency upto
230 MHz, using upto three independent configurable
PLLs.
The CDCEx937 has separate output supply pins,
VDDOUT, whichis 1.8V for CDCEL937 andto 2.5V 3.3V for CDCE937.
The input accepts an external crystalor LVCMOS
clock signal.Ifan external crystalis used, an on-chip
load capacitoris adequate for most applications. The
valueof the load capacitoris programmable from0to pF. Additionally, an on-chip VCXOis selectable
which allows synchronizationof the output frequencyan external control signal, thatis, PWM signal.
Device Information(1)(1) Forall available packages, see the orderable addendumat
the endofthe datasheet.
Typical Application Schematic
