Texas Instruments CDCM6208V2RGZT

Overview

CDCM6208V2RGZT from Texas Instruments is a 2:8 low-jitter clock generator and jitter cleaner with fractional-N synthesis, delivering eight configurable differential or CMOS clock outputs up to 800 MHz. It supports dual differential inputs (PRI_REF/SEC_REF), crystal input, and operates across –40°C to 85°C for wireless infrastructure baseband timing, SyncE, and IEEE 1588 timing servers.

For engineers reviewing the CDCM6208V2RGZT datasheet, CDCM6208V2RGZT pinout, CDCM6208V2RGZT application, or CDCM6208V2RGZT equivalent, key selection criteria include its 265 fs-rms synthesizer jitter, 4× integer + 4× fractional output dividers, flexible 1.8/2.5/3.3-V supply domains per output bank, SPI/I²C/pin-mode configuration, and 7×7 mm 48-VQFN (RGZ) package compatibility with high-channel-isolation clock distribution.

Technical Context

The CDCM6208V2RGZT integrates a low-noise PLL with VCO and dual reference input muxing (PRI_REF/SEC_REF), enabling automatic or manual switching between primary and secondary references. Its fractional-N divider architecture achieves <1 ppm frequency accuracy on four outputs without external crystals, supporting precise Ethernet synchronization and pico-cell base station timing.

Each of the eight outputs is independently configurable for LVPECL-like, CML, LVDS-like, HCSL, or LVCMOS signaling, with dedicated analog supply pins (VDD_Y0_Y1, VDD_Y2_Y3, etc.) allowing mixed-voltage operation. The device implements full power-down (PDN), output sync (SYNCN), and status reporting (STATUS0/STATUS1) for system-level timing control in multicore DSP and packet network applications.

Key Specifications

Pinout & Package

Package: 48-pin VQFN (RGZ), 7.0 mm × 7.0 mm, exposed thermal pad, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar clock generator applications.

Compared with LMK04828BISQE/NOPB and Si5341-A01A-GM, the CDCM6208V2RGZT offers optimal balance of jitter performance (265 fs-rms), dual-reference flexibility, crystal support, and 0.5-W power in a compact 48-VQFN-making it ideal for cost- and space-constrained wireless infrastructure and timing server designs where full DSPLL complexity is unnecessary.

Availability

CDCM6208V2RGZT is available at Aetrix Electronics and suitable for wireless infrastructure baseband clocking, SyncE timing servers, and pico-cell base station designs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for CDCM6208V2RGZT 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 company specializing in analog, embedded processing, and connectivity technologies, with leadership in precision timing, power management, and signal chain solutions.

The CDCM6208 product line delivers highly integrated, low-jitter clock generators optimized for wireless infrastructure, networking, and high-performance computing applications requiring flexible frequency synthesis and robust jitter cleaning.

FAQ

What is the maximum output frequency supported by the CDCM6208V2RGZT?

The CDCM6208V2RGZT supports differential output frequencies up to 800 MHz. This capability enables direct clocking of high-speed interfaces such as PCIe Gen2/Gen3, SRIO, and FPGA transceivers without additional frequency multiplication. All eight outputs (Y0–Y7) are individually programmable within this range using integer or fractional-N dividers, and the specification is validated across the full –40°C to 85°C operating temperature range per the SCAS931G datasheet.

Does the CDCM6208V2RGZT support crystal oscillator input?

Yes, the CDCM6208V2RGZT supports crystal input on the SEC_REF pins (pins 11 and 12). When configured in crystal mode, the internal oscillator circuit drives the crystal directly, eliminating the need for an external XO. The device accepts fundamental-mode crystals from 8 kHz to 250 MHz depending on supply voltage, and crystal operation is fully supported in both SPI/I²C and pin-mode configurations per Section 6.11 of the datasheet.

How does the CDCM6208V2RGZT achieve <1 ppm frequency accuracy?

The CDCM6208V2RGZT achieves <1 ppm frequency accuracy using its on-chip fractional-N divider architecture on four of its eight outputs (Y4–Y7). Unlike integer dividers that introduce quantization error, the fractional-N engine dynamically adjusts division ratios to synthesize exact target frequencies-e.g., 122.88 MHz or 156.25 MHz-with zero ppm residual error. This eliminates the need for multiple crystal oscillators and simplifies frequency planning in SyncE and IEEE 1588 timing systems.

Can the CDCM6208V2RGZT operate with mixed output voltage levels?

Yes, the CDCM6208V2RGZT supports mixed output voltage levels via dedicated analog supply pins: VDD_Y0_Y1, VDD_Y2_Y3, VDD_Y4, VDD_Y5, VDD_Y6, and VDD_Y7. Each pair or individual output bank can be independently set to 1.8 V, 2.5 V, or 3.3 V, enabling direct interface to heterogeneous devices-such as 1.8-V FPGA I/O banks, 2.5-V SerDes receivers, and 3.3-V legacy logic-without external level shifters or voltage translators.

What is the purpose of the SYNCN pin on the CDCM6208V2RGZT?

The SYNCN pin (pin 42) provides hardware-controlled output synchronization: a low-to-high transition forces all eight clock outputs (Y0–Y7) to realign their rising edges simultaneously, eliminating inter-output skew. This is critical for applications requiring deterministic phase relationships-such as multi-channel ADC/DAC sampling or parallel SerDes lanes. When held low, SYNCN disables all outputs; during normal operation, it remains high unless explicit phase alignment is required.