Datasheet Texas Instruments CDCEL949 — Ficha de datos
| Fabricante | Texas Instruments |
| Serie | CDCEL949 |
Sintetizador de reloj VCXO programable de 4 PLL con salidas LVCMOS de 1.8 V
Hojas de datos
CDCE(L)913: Flexible Low Power LVCMOS Clock Generator With SSC Support for EMI Reduction datasheet
PDF, 1.5 Mb, Revisión: F, Archivo publicado: oct 27, 2016
Extracto del documento
Precios
Estado
| CDCEL949PW | CDCEL949PWG4 | CDCEL949PWR | CDCEL949PWRG4 | |
|---|---|---|---|---|
| Estado del ciclo de vida | Activo (Recomendado para nuevos diseños) | Activo (Recomendado para nuevos diseños) | Activo (Recomendado para nuevos diseños) | Activo (Recomendado para nuevos diseños) |
| Disponibilidad de muestra del fabricante | Sí | Sí | Sí | Sí |
Embalaje
| CDCEL949PW | CDCEL949PWG4 | CDCEL949PWR | CDCEL949PWRG4 | |
|---|---|---|---|---|
| N | 1 | 2 | 3 | 4 |
| Pin | 24 | 24 | 24 | 24 |
| Package Type | PW | PW | PW | PW |
| Industry STD Term | TSSOP | TSSOP | TSSOP | TSSOP |
| JEDEC Code | R-PDSO-G | R-PDSO-G | R-PDSO-G | R-PDSO-G |
| Package QTY | 60 | 60 | 2000 | 2000 |
| Carrier | TUBE | TUBE | LARGE T&R | LARGE T&R |
| Device Marking | CDCEL949 | CDCEL949 | CDCEL949 | CDCEL949 |
| Width (mm) | 4.4 | 4.4 | 4.4 | 4.4 |
| Length (mm) | 7.8 | 7.8 | 7.8 | 7.8 |
| Thickness (mm) | 1 | 1 | 1 | 1 |
| Pitch (mm) | .65 | .65 | .65 | .65 |
| Max Height (mm) | 1.2 | 1.2 | 1.2 | 1.2 |
| Mechanical Data | Descargar | Descargar | Descargar | Descargar |
Paramétricos
| Parameters / Models | CDCEL949PW | CDCEL949PWG4 | CDCEL949PWR | CDCEL949PWRG4 |
|---|---|---|---|---|
| Divider Ratio | Universal | Universal | Universal | Universal |
| Function | Clock Synthesizer | Clock Synthesizer | Clock Synthesizer | Clock Synthesizer |
| Input Level | Crystal, LVCMOS | Crystal, LVCMOS | Crystal, LVCMOS | Crystal, LVCMOS |
| Jitter-Peak to Peak(P-P) or Cycle to Cycle, C-C | 60 ps | 60 ps | 60 ps | 60 ps |
| Number of Outputs | 9 | 9 | 9 | 9 |
| Operating Temperature Range, C | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 |
| Output Frequency(Max), MHz | 230 | 230 | 230 | 230 |
| Output Level | LVCMOS | LVCMOS | LVCMOS | LVCMOS |
| Output Skew, ps | 150 | 150 | 150 | 150 |
| Package Group | TSSOP | TSSOP | TSSOP | TSSOP |
| Package Size: mm2:W x L, PKG | 24TSSOP: 50 mm2: 6.4 x 7.8(TSSOP) | 24TSSOP: 50 mm2: 6.4 x 7.8(TSSOP) | 24TSSOP: 50 mm2: 6.4 x 7.8(TSSOP) | 24TSSOP: 50 mm2: 6.4 x 7.8(TSSOP) |
| Programmability | EEPROM | EEPROM | EEPROM | EEPROM |
| Rating | Catalog | Catalog | Catalog | Catalog |
| Special Features | Integrated EEPROM,Multiplier/Divider,Spread Spectrum Clocking (SSC) | Integrated EEPROM,Multiplier/Divider,Spread Spectrum Clocking (SSC) | Integrated EEPROM,Multiplier/Divider,Spread Spectrum Clocking (SSC) | Integrated EEPROM,Multiplier/Divider,Spread Spectrum Clocking (SSC) |
| VCC, V | 1.8 | 1.8 | 1.8 | 1.8 |
| VCC Core, V | 1.8 | 1.8 | 1.8 | 1.8 |
| VCC Out, V | 1.8 | 1.8 | 1.8 | 1.8 |
Plan ecológico
| CDCEL949PW | CDCEL949PWG4 | CDCEL949PWR | CDCEL949PWRG4 | |
|---|---|---|---|---|
| RoHS | Obediente | Obediente | Obediente | Obediente |
Notas de aplicación
- VCXO Application Guideline for CDCE(L)9xx Family (Rev. A)PDF, 107 Kb, Revisión: A, Archivo publicado: abr 23, 2012
- Practical consideration on choosing a crystal for CDCE(L)9xx familyPDF, 60 Kb, Archivo publicado: marzo 24, 2008
- Usage of I2C for CDCE(L)949, CDCE(L)937, CDCE(L)925, CDCE(L)913PDF, 297 Kb, Archivo publicado: sept 23, 2009
This document presents a method to smoothly change frequency by IВІCв„ў protocol on Texas Instruments CDCE(L)949, CDCE(L)937, CDCE(L)925, CDCE(L)913 Clock Synthesizers, thus avoiding unnecessary intermediate frequencies. It also includes a code example to generate the IВІC protocol for the CDCE(L)9xx with the TMS320C645x. - Generating Low Phase-Noise Clocks for Audio Data Converters from Low FrequencyPDF, 860 Kb, Archivo publicado: marzo 31, 2008
Generating a high-frequency system clock Fs (128fs to 768fs) from a low-frequency sampling clock fs (10 kHz to 200 kHz) is challenging, while attempting to maintain low phase jitter. A traditional phase-lock loop (PLL) can do the frequency translation, but the added phase jitter prevents the generated system clock signal from effectively driving high-performance audio data converters. This applica - Troubleshooting I2C Bus ProtocolPDF, 184 Kb, Archivo publicado: oct 19, 2009
When using the I2Cв„ў bus protocol, the designer must ensure that the hardware complies with the I2C standard. This application report describes the I2C protocol and provides guidelines on debugging a missing acknowledgment, selecting the pullup resistors, or meeting the maximum capacitance load of an I2C bus. A conflict occurs if devices sharing the I2C bus have the same slave address. This
Linea modelo
Serie: CDCEL949 (4)
Clasificación del fabricante
- Semiconductors> Clock and Timing> Clock Generators> Spread-Spectrum Clocks