Clock Generators

CDCE913PWR

CDCE913PWR - Programmable 1-PLL VCXO Clock Synthesizer | TI

The Texas Instruments CDCE913PWR is a programmable 1-PLL VCXO clock synthesizer that generates up to three output clocks from a single input frequency, with outputs up to 230 MHz. It operates from a 1.8-V, 2.5-V, or 3.3-V supply and is housed in a 14-pin TSSOP package. The device features an integrated configurable PLL, spread-spectrum clocking for EMI reduction, and separate output supply pins (VDDOUT) for flexible voltage levels. A clock synthesizer is an electronic circuit that generates multiple output clock frequencies from a single reference input, using phase-locked loops (PLLs) and dividers. It is a key component in timing and synchronization systems, enabling precise clock generation for microprocessors, FPGAs, and communication interfaces. Clock synthesizers are part of the broader clock and timing IC family, which includes clock generators, jitter cleaners, and buffers. Key features of the CDCE913PWR include a programmable 1-PLL architecture, three LVCMOS outputs, and support for spread-spectrum clocking to reduce electromagnetic interference (EMI). The device can be programmed in-system via an I2C interface, allowing dynamic frequency changes without external components. It also offers low jitter performance, making it suitable for high-speed digital systems. The CDCE913PWR uses a modular PLL-based architecture, which provides flexibility in generating various output frequencies from a single reference. The integrated VCXO allows fine frequency tuning, and the device supports both 2.5-V and 3.3-V LVCMOS output levels. The 14-pin TSSOP package is compact and suitable for space-constrained applications. Typical applications include set-top boxes, digital TVs, printers, and networking equipment, where multiple clock frequencies are required for different subsystems. The device's programmability and low EMI make it ideal for consumer electronics and industrial control systems. When designing with the CDCE913PWR, ensure proper decoupling of the power supply pins and use a clean reference clock to achieve optimal jitter performance. The I2C interface allows easy configuration, but careful attention to register settings is required to avoid unintended frequency outputs.