The CDCE937-Q1 and CDCEL937-Q1 devices are modular, phase-locked loop (PLL)-based programmable clock synthesizers. These devices provide flexible and programmable options, such as output clocks, input signals, and control pins, so that the user can configure the CDCEx937-Q1 to the necessary specifications.
The CDCEx937-Q1 generates up to seven output clocks from a single input frequency to enable both board space and cost savings. Additionally, with multiple outputs, the clock generator can replace multiple crystals with one clock generator. This makes the device well-suited for head unit and telematics applications in infotainment and camera systems in ADAS, as these platforms are evolving into smaller and more cost effective systems.
Furthermore, each output can be programmed in-system for any clock frequency up to 230MHz through the integrated, configurable PLL. The PLL also supports spread-spectrum clocking (SSC) with programmable down and center spread. This provides better electromagnetic interference (EMI) performance to enable customers to pass industry standards such as CISPR-25.
Customization of frequency programming and SSC are accessed using three user-defined control pins. This eliminates the additional interface requirement to control the clock. Specific power-up and power-down sequences can also be defined to the user’s needs.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | CDCEx937-Q1 Programmable 3-PLL VCXO Clock Synthesizer With 1.8V, 2.5V, and 3.3V LVCMOS Outputs datasheet (Rev. D) | PDF | HTML | 23 Jul 2025 |
| Application note | Crystal or Crystal Oscillator Replacement with Silicon Devices | 18 Jun 2014 | ||
| 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 | ||
| Application note | Generating Low Phase-Noise Clocks for Audio Data Converters from Low Frequency | 31 Mar 2008 |
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| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| TSSOP (PW) | 20 | Ultra Librarian |
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