Texas Instruments CDCEL9XXPROGEVM

Overview

CDCEL9XXPROGEVM from Texas Instruments is an evaluation and programming kit for the CDCEL949 programmable low-power LVCMOS clock generator, supporting in-system configuration of four independent PLLs, nine LVCMOS outputs up to 230MHz, spread-spectrum clocking (SSC), and EEPROM-based nonvolatile storage - used for rapid PLL design validation in video/audio timing, USB, Ethernet, and wireless interface applications.

For engineers reviewing the CDCEL9XXPROGEVM datasheet, CDCEL9XXPROGEVM pinout, CDCEL9XXPROGEVM application, or CDCEL9XXPROGEVM equivalent, this kit enables hands-on verification of CDCEL949 register programming, SSC modulation tuning, multi-PLL frequency synthesis, and output supply rail (1.8V) behavior under real-world load and thermal conditions.

Technical Context

The CDCEL9XXPROGEVM implements TI's Pro-Clock™ architecture to support full in-circuit programming of the CDCEL949 via I²C (SDA/SCL), including volatile register writes and EEPROM commits. It provides access to all 24-pin TSSOP signals - including Xin/CLK, S0/S1/S2 control inputs, VDD/VDDOUT, and nine Yx outputs - with on-board crystal oscillator support (8–32MHz), VCXO control voltage injection, and configurable load capacitance (0–20pF).

It enables real-time measurement of key CDCEL949 performance metrics: cycle-to-cycle jitter (70–120ps typ.), output skew (≤160ps), SSC center/down-spread selection, and 0ppm clock generation from 27MHz reference - all while maintaining the device's –40°C to 85°C operating range and 1.8V core supply compliance.

Key Specifications

Availability

CDCEL9XXPROGEVM is available at Aetrix Electronics and suitable for DTV, STB, IP-STB, DVD recorder, and printer timing development requiring stable component supply, fast prototyping turnaround, and production-ready clock system validation.

Supply support for CDCEL9XXPROGEVM includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and clock solutions - with over 40 years of leadership in precision timing devices and programmable clock architectures.

The CDCEL9XXPROGEVM belongs to TI's Pro-Clock™ evaluation platform series, designed specifically to accelerate time-to-market for high-performance, low-jitter clock synthesis in consumer audio/video, networking, and interface subsystems.

FAQ

What is the primary function of the CDCEL9XXPROGEVM?

The CDCEL9XXPROGEVM is a dedicated evaluation and programming kit for the CDCEL949 programmable clock generator. It enables engineers to configure, validate, and optimize the CDCEL949's four PLLs, nine LVCMOS outputs, spread-spectrum clocking, and EEPROM settings in real hardware - without requiring custom PCB design or firmware integration.

Does CDCEL9XXPROGEVM support both crystal and LVCMOS input sources?

Yes, the CDCEL9XXPROGEVM fully supports both input modes for the CDCEL949: external crystals (8–32 MHz fundamental mode) with programmable on-chip load capacitance (0–20 pF), and single-ended LVCMOS clock inputs up to 160 MHz. The board includes jumpers and layout provisions to select either source without modification.

Can CDCEL9XXPROGEVM program the CDCEL949's EEPROM and volatile registers?

Yes, the CDCEL9XXPROGEVM supports full I²C-based programming of both volatile registers and nonvolatile EEPROM on the CDCEL949. It uses TI's Pro-Clock™ software suite to write configuration data, store factory defaults, and commit user-defined settings - enabling one-time pre-programming before assembly or field reconfiguration.

How does CDCEL9XXPROGEVM assist with spread-spectrum clocking (SSC) validation?

The CDCEL9XXPROGEVM allows direct control and measurement of SSC parameters for the CDCEL949: users can select center-spread or down-spread modulation, adjust spread amplitude (±0.25% to ±2%), and verify EMI reduction using oscilloscope or spectrum analyzer probes on Yx outputs - all while monitoring jitter impact (e.g., 70–120 ps cycle-to-cycle).

Is CDCEL9XXPROGEVM compatible with other CDCEx9xx devices like CDCE949?

No - the CDCEL9XXPROGEVM is specifically designed for the CDCEL949 (1.8V output supply variant). While it shares the same 24-pin TSSOP footprint and functional architecture with CDCE949, its power delivery, decoupling, and default configuration are optimized for 1.8V VDDOUT operation and cannot safely support CDCE949's 2.5V/3.3V output rails without hardware modification.