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CDCE937

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Programmable 3-PLL VCXO clock synthesizer with 2.5-V or 3.3-V LVCMOS outputs

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Data sheet

CDCE937

ACTIVE
Data sheet Order now

Product details

Function Clock synthesizer Number of outputs 7 Output frequency (max) (MHz) 230 Core supply voltage (V) 1.8 Output supply voltage (V) 2.5, 3.3 Input type LVCMOS, XTAL Output type LVCMOS Operating temperature range (°C) -40 to 85 Features Integrated EEPROM, Multiplier or divider, Spread-spectrum clocking (SSC) Rating Catalog
Function Clock synthesizer Number of outputs 7 Output frequency (max) (MHz) 230 Core supply voltage (V) 1.8 Output supply voltage (V) 2.5, 3.3 Input type LVCMOS, XTAL Output type LVCMOS Operating temperature range (°C) -40 to 85 Features Integrated EEPROM, Multiplier or divider, Spread-spectrum clocking (SSC) Rating Catalog
TSSOP (PW) 20 41.6 mm² 6.5 x 6.4
  • 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™)
  • APPLICATIONS
    • D-TVs, STBs, IP-STBs, DVD Players, DVD Recorders, and Printers

All other trademarks are the property of their respective owners
  • 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™)
  • APPLICATIONS
    • D-TVs, STBs, IP-STBs, DVD Players, DVD Recorders, and Printers

All other trademarks are the property of their respective owners

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.

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.
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Technical documentation

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Type Title Date
* Data sheet CDCEx937 Flexible Low Power LVCMOS Clock Generator With SSC Support For EMI Reduction datasheet (Rev. G) PDF | HTML 10 Oct 2016
Application note VCXO Application Guideline for CDCE(L)9xx Family (Rev. A) 23 Apr 2012
User guide CDCE(L)9XX & CDCEx06 Programming Evaluation Module Manual (Rev. A) 22 Nov 2010
Application note General I2C / EEPROM usage for the CDCE(L)9xx family 26 Jan 2010
Application note Troubleshooting I2C Bus Protocol 19 Oct 2009
Application note Usage of I2C for CDCE(L)949, CDCE(L)937, CDCE(L)925, CDCE(L)913 23 Sep 2009
User guide CDCE(L)9XX & CDCEx06 Programming Evaluation Module Manual 09 Dec 2008
Application note Generating Low Phase-Noise Clocks for Audio Data Converters from Low Frequency 31 Mar 2008
Application note Practical consideration on choosing a crystal for CDCE(L)9xx family 24 Mar 2008

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