Programmable 3-PLL VCXO clock synthesizer with 1.8-V LVCMOS outputs
Product details
Parameters
Package | Pins | Size
Features
- 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
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.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | CDCEx937 Flexible Low Power LVCMOS Clock Generator With SSC Support For EMI Reduction datasheet (Rev. G) | Oct. 10, 2016 |
Technical articles | How to select an optimal clocking solution for your FPGA-based design | Dec. 09, 2015 | |
Technical articles | Clocking sampled systems to minimize jitter | Jul. 31, 2014 | |
Technical articles | Timing is Everything: How to optimize clock distribution in PCIe applications | Mar. 28, 2014 | |
User guide | CDCE(L)9XX & CDCEx06 Programming Evaluation Module Manual (Rev. A) | Nov. 22, 2010 | |
Application note | Troubleshooting I2C Bus Protocol | Oct. 19, 2009 | |
Application note | Usage of I2C for CDCE(L)949, CDCE(L)937, CDCE(L)925, CDCE(L)913 | Sep. 23, 2009 | |
User guide | CDCE(L)9XX & CDCEx06 Programming Evaluation Module Manual | Dec. 09, 2008 | |
Application note | Generating Low Phase-Noise Clocks for Audio Data Converters from Low Frequency | Mar. 31, 2008 | |
Application note | Practical consideration on choosing a crystal for CDCE(L)9xx family | Mar. 24, 2008 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The clock generator CDCE(L)949 family has integrated EEPROM that allows the default frequency settings to be saved upon start up. CDCEL9XXPROGEVM is a programming board that allows a fast programming of prototyping samples or small production quantities. It applies to all 8 devices in the family (...)
Software development
- CDCE949
- CDCE937
- CDCE925
- CDCE913
- CDCE906
- CDCE706
- CDCEL949
- CDCEL937
- CDCEL925
- CDCEL913
It is intended to be used with the evaluation modules of the above devices.
Features
- Easy and fast device programming through EEPROM, I2C
- Based on Labview
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
TSSOP (PW) | 20 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
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