Texas Instruments CDCE72010RGCTG4

Overview

CDCE72010RGCTG4 from Texas Instruments is a ten-output high-performance clock synchronizer, jitter cleaner, and clock distributor that locks a VCXO/VCO (up to 1.5 GHz LVPECL) to one of two reference clocks (500 MHz differential or 250 MHz LVCMOS). It features programmable output dividers (1–80), individual skew control, SPI-configurable signaling (LVPECL/LVDS/LVCMOS), and integrated EEPROM for non-volatile settings. Used in telecom SERDES timing and precision test equipment.

For engineers reviewing the CDCE72010RGCTG4 datasheet, CDCE72010RGCTG4 pinout, CDCE72010RGCTG4 application, or CDCE72010RGCTG4 equivalent, key selection factors include its dual-reference redundancy, 50 ps typical output-to-output skew (LVDS), 200 μA–3 mA charge-pump current range, and support for frequency hold-over via HOLD/RESET pins - all critical for fail-safe telecom and instrumentation clocking.

Technical Context

The CDCE72010RGCTG4 implements a high-precision analog PLL with a fully programmable feedback divider (N), reference divider (R), and output dividers (P), enabling precise frequency synthesis per the relation f_{VCXO_IN}/f_REF = (P×N)/(R×M). Its dual-reference architecture supports automatic or manual REF_SEL switching between PRI_REF and SEC_REF inputs, with hold-over mode activation via HOLD pin or SPI.

It integrates on-chip VBB bias generation for single-ended inputs, internal 12-kΩ current-sense resistor for accurate charge-pump calibration, and independent 3-state control per output. All configuration-including output signaling type, divider values, skew offsets, and auxiliary input routing-is stored in non-volatile EEPROM and loaded at power-up.

Key Specifications

Pinout & Package

CDCE72010RGCTG4 is housed in a 64-pin QFN package (RGC, 9 mm × 9 mm, 0.5 mm pitch) with exposed thermal pad. The package supports JEDEC-compliant layout (6×6 vias) or enhanced thermal performance (10×10 vias), achieving θ_JA = 13.8°C/W at 100 LFM airflow.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMK04828BISQE/NOPB and Si5341-B-GM, CDCE72010RGCTG4 offers unique hardware-configurable defaults (CD mode), on-the-fly AUXIN reassignment, and integrated EEPROM - making it optimal for cost-sensitive, standalone timing modules requiring zero-firmware startup and field-reconfigurable redundancy.

Availability

CDCE72010RGCTG4 is available at Aetrix Electronics and suitable for telecom infrastructure, high-speed test equipment, and redundant timing systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for CDCE72010RGCTG4 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 decades of expertise in high-performance timing devices.

The CDCE72010RGCTG4 belongs to TI's high-precision clock synchronizer product line, designed specifically for jitter-critical applications in telecom, instrumentation, and SERDES systems where phase alignment, redundancy, and autonomous operation are mandatory.

FAQ

What is the maximum input frequency supported by CDCE72010RGCTG4 on the VCXO_IN pins?

The CDCE72010RGCTG4 supports up to 1.5 GHz on VCXO_IN when configured for LVPECL signaling, 800 MHz for LVDS, and 250 MHz for LVCMOS. This is confirmed in the Absolute Maximum Ratings and Timing Requirements sections of the official datasheet (SCAS858C), with corresponding input slew rate and amplitude specifications ensuring signal integrity at these rates. The CDCE72010RGCTG4 uses internal termination and VBB bias to maintain performance across this wide range.

Does CDCE72010RGCTG4 support both LVPECL and LVDS outputs simultaneously?

Yes, CDCE72010RGCTG4 supports mixed-signaling outputs: any combination of up to 10 differential outputs (LVPECL or LVDS) or up to 20 LVCMOS outputs. Each output pair (U0–U9) is independently configurable via SPI to operate in LVPECL, LVDS, or LVCMOS mode - verified in the "Output Configuration" section and Pin Functions table of the SCAS858C datasheet. Output 9 (U9P/U9N) may be reassigned as auxiliary input if needed.

How does the hold-over functionality work on CDCE72010RGCTG4?

The CDCE72010RGCTG4 activates frequency hold-over when the HOLD pin is asserted low (or via SPI register), placing the charge pump in 3-state while maintaining normal output operation. During hold-over, the device sustains the last-locked VCXO frequency without reference input - critical for fail-safe telecom timing. This behavior is explicitly defined in the "HOLD Input Pin" description and Figure 1 block diagram of the SCAS858C datasheet.

Is non-volatile configuration storage built into CDCE72010RGCTG4?

Yes, CDCE72010RGCTG4 integrates on-chip EEPROM that stores all configuration settings - including output signaling type, divider values, skew offsets, reference selection, and AUX_SEL behavior. Settings persist across power cycles and load automatically at startup, eliminating the need for external memory or host initialization. This is documented in the "Integrated On-Chip Non-Volatile Memory" feature list and "EEPROM" AC/DC Characteristics table (EEret = 10 years) of SCAS858C.

What package type and thermal characteristics apply to CDCE72010RGCTG4?

CDCE72010RGCTG4 uses a 64-pin QFN package (TI designation RGC, 9 mm × 9 mm, 0.5 mm pitch) with exposed thermal pad. Thermal resistance is θ_JA = 13.8°C/W (100 LFM, 10×10 vias) and θ_JP = 1.5°C/W, per the Package Thermal Resistance table in SCAS858C. The thermal pad must be soldered to a solid ground plane with ≥9 vias (0.3 mm diameter) for reliable operation at full load.